Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
13
datasets available to search
ShareScore release 0.9.0
Dataset results
13 results for “Cropland abandonment”
Supporting Data for Crawford et al. 2024, Effects of Cropland Abandonment on Biodiversity
<p><strong>This archive contains derived and supporting data products to support:</strong></p> <blockquote>Crawford CL*, Wiebe RA, Yin H, Radeloff VC, and Wilcove DS. 2024. Effects of cropland abandonment on biodiversity. <em>Nature Sustainability.</em> In press.</blockquote> <p>*Contact Christopher L. Crawford at ccrawford@alumni.princeton.edu with any questions.</p> <p>A public Zenodo archive of the Github repository containing analysis scripts developed for this project (https://github.com/chriscra/biodiversity_abandonment) can be found here: <a href="https://doi.org/10.5281/zenodo.13777205">10.5281/zenodo.13777205</a></p> <p>This analysis builds on: Crawford, C. L., Yin, H., Radeloff, V. C. & Wilcove, D. S. Rural land abandonment is too ephemeral to provide major benefits for biodiversity and climate. <em>Science Advances </em>8, 1–13 (2022). Data and scripts from Crawford et al. 2022 are archived and publicly available at Zenodo (https://doi.org/10.1126/sciadv.abm8999).</p> <p>The annual land cover maps (1987-2017, 30 meter resolution) that underlie our analysis were developed on Google Earth Engine using publicly available Landsat satellite imagery (Yin et al. 2020, Remote Sensing of Environment, https://doi.org/10.1016/j.rse.2020.111873).<br>These annual land cover maps, along with other derived data that were produced by Crawford et al. 2022, are archived and publicly available at Zenodo (https://doi.org/10.5281/zenodo.5348287).</p> <p>This archive includes important derived data products created for Crawford et al. 2024. Note that these and other project data are described in detail in **util/_util_files.R** (https://github.com/chriscra/biodiversity_abandonment). This is a convenience script that loads many of the relevant input and derived data that are used throughout the project. The primary required data files for reproducing this work are archived here, but "_util_files.R" also includes information about where additional files can be accessed (if external, e.g., https://doi.org/10.5281/zenodo.5348287) or created across the various .R and .Rmd files in this repository (e.g., "habitats.Rmd" chunk {r land-cover-of-abn-pixels}).</p> <p>Naming conventions for sites and raster files follow Crawford et al. 2022, as described here: https://doi.org/10.5281/zenodo.5348287</p> <p><strong>Site file names correspond to the following geographic locations:</strong><br>belarus = Vitebsk, Belarus / Smolensk, Russia<br>bosnia_herzegovina = Bosnia & Herzegovina<br>chongqing = Chongqing, China<br>goias = Goiás, Brazil<br>iraq = Iraq<br>mato_grosso = Mato Grosso, Brazil<br>nebraska = Nebraska / Wyoming, USA<br>orenburg = Orenburg, Russia / Uralsk, Kazakhstan<br>shaanxi = Shaanxi/Shanxi, China<br>volgograd = Volgograd, Russia<br>wisconsin = Wisconsin, USA</p> <h1><strong>This archive includes the following files:</strong></h1> <ul> <li>site_df.csv</li> <li>crop_to_abn_iucn_observed.zip</li> <li>crop_to_abn_iucn_potential.zip</li> <li>max_abn_lcc_iucn.zip</li> <li>max_abn_lcc_iucn_potential.zip</li> <li>lcc_iucn_habitat.zip</li> <li>lcc_iucn_habitat_potential.zip</li> <li>frag_df.csv</li> <li>frag_hypo_no_abn_2017_df.csv</li> <li>iucn_lc_crosswalk.csv</li> <li>habitat_age_req_coded.csv</li> <li>centroids_df.csv</li> <li>aoh_l.parquet</li> <li>aoh_feols.parquet</li> <li>aoh_start_end_l.parquet</li> <li>aoh_change_df.parquet</li> <li>aoh_est_change_tmp_all.csv</li> <li>aoh_obs_change_tmp_all.csv</li> <li>taxonomy_df.parquet</li> <li>final_species_list.csv</li> <li>trait_mod_df_modx1.rds</li> </ul> <h3>site_df.csv</h3> <p>A list of site names and related metadata describing our study sites, taken from https://zenodo.org/records/5348287</p> <h2>Derived habitat rasters:</h2> <h3>crop_to_abn_iucn_observed.zip (Calculation 1a)<br>crop_to_abn_iucn_potential.zip (Calculation 1b)<br>max_abn_lcc_iucn.zip (Calculation 2a)<br>max_abn_lcc_iucn_potential.zip (Calculation 2b)<br>lcc_iucn_habitat.zip (Calculation 3a)<br>lcc_iucn_habitat_potential.zip (Calculation 3b)</h3> <p>These maps show IUCN Level 2 habitat types (Jung et al. 2020) interpolated onto the land cover classes in the Yin et al. (2020) abandonment maps at multiple spatial and temporal extents, which serve as inputs for the three primary calculations in our manuscript. Accompanying each calculation is a corresponding map for a scenarios in which no abandoned croplands were recultivated over the course of the time series (marked as "potential"). Each .zip file contains maps for each of 11 sites.</p> <p><strong>Calculation 1. </strong>This calculation isolates the direct effect of abandonment on habitat availability, by comparing the habitat provided before and after abandonment. These "crop_to_abn_iucn" maps show IUCN Level 2 habitats in cropland pixels that experienced abandonment, including the abandonment period as well as the immediately preceding period of cultivation (to allow for a proper before and after comparison). As a result, these maps show only habitat provided by croplands when they were actively cultivated, abandoned, or, where appropriate, recultivated, which allows for a proper before and after comparison. These maps are created in the script "cluster/noncrop_precrop_mask.R".</p> <p><strong>Calculation 2.</strong> This calculation considered changes in habitat that took place exclusively in pixels that experienced abandonment at some point during the time series (following Calculation 1), but expanded to track changes across our entire time series, from 1987 through 2017, in order to account for any land cover that was cleared for agriculture prior to abandonment. These "max_abn_lcc_iucn" maps therefore show IUCN Level 2 habitat types for each pixel that was abandoned at any point during the time series, across the full time series. These maps were created in the script "habitats.Rmd" code chunks {r mask-lcc-iucn-habitat-to-abn} and {r *potential_max}. </p> <p><strong>Calculation 3. </strong>This calculation tracks habitat area provided by every pixel throughout the entire spatial and temporal extent (1987-2017), in order to place abandonment into the context of broader land-cover change dynamics like ongoing cropland expansion taking place alongside of abandonment. These "lcc_iucn" maps therefore show the IUCN Level 2 habitat types for each pixel at each site in each year of our time series. These maps were created in the script "habitats.Rmd" code chunks {r lcc-iucn-habitat-composite} and {r *potential-lcc-full} and the script "cluster/potential_full_iucn.R".</p> <p>Some analyses require these .tif files (manipulated as SpatRasters using {terra}, https://rspatial.org/terra/) to be converted to tabular format (data.tables, via {data.table} (https://rdatatable.gitlab.io/data.table/) and saved as .parquet files (via {arrow}, https://arrow.apache.org/docs/r/). This can be accomplished via scripts "cluster/save_spatraster_as_dt.R" and "cluster/save_parquet.R."</p> <h3><br>frag_df.csv<br>frag_hypo_no_abn_2017_df.csv</h3> <p>These tabular files contain derived fragmentation statistics calculated using the {landscapemetrics} R package (https://r-spatialecology.github.io/landscapemetrics/). The second file contains metrics for a scenario in which no croplands were abandoned through the year 2017, in order to assess the effect cropland abandonment on landscape configuration. Each file contains 11 columns: </p> <ol> <li>"layer" -- the spatial raster layer for which the metric is calculated, corresponding to a year.</li> <li>"level" -- the level at which the metric is calculated, in our case, the land cover "class."</li> <li>"class" -- corresponding the to land cover class for which the metric is calculated (1 = non-vegetation, 2 = woody vegetation [i.e., forest], 3 = cropland, and 4 = herbaceous vegetation [i.e., grassland]).</li> <li>"id" -- An unused field containing NA values.</li> <li>"metric" -- the specific term used for each metric by {landscapemetrics} ("area_mn", "clumpy", or "para_mn").</li> <li>"value" -- the numerical value of the statistic.</li> <li>"name" -- the name of the landscape metric being calculated ("patch area," "clumpiness index," or "perimeter-area ratio").</li> <li>"type" -- the broad type of metric being calculated ("area and edge metric," "aggregation metric," or "shape metric").</li> <li>"function_name" -- the name of the {landscapemetrics} function used to calculate the statistic.</li> <li>"site" -- the site (out of 11 study sites) for which this statistic was calculated.</li> <li>"year" -- the year corresponding to the metric statistic, between 1987-2017 (including 1986-2018 for Nebraska and 1987-2018 for Wisconsin)<br>Additional details on these metrics can be found at https://r-spatialecology.github.io/landscapemetrics/.</li> </ol> <p>The spatial IUCN data underlying our analyses (species range maps) are available upon request from BirdLife International (http://datazone.birdlife.org/species/requestdis) and IUCN (https://www.iucnredlist.org/resources/spatial-data-download). Tabular species assessment data (including habitat and elevation preferences) are freely available from IUCN (https://www.iucnredlist.org/). Here we share three IUCN-related data files that serve as important inputs throughout our analyses:</p> <h3>iucn_lc_crosswalk.csv</h3> <p>This tabular file outlines the crosswalk between the 4 land cover classes in Yin et al. 2020 and the IUCN Level 2 habitat types mapped by Jung et al. 2020. It contains five columns:</p> <ol> <li>"map_code" -- the habitat code corresponding to Jung et al. (2020).</li> <li>"Coarse_Name" -- the broad Level 1 habitat grouping.</li> <li>"lc" -- the corresponding land cover type from Yin et al. (2020) (1 = non-vegetation, 2 = woody vegetation [i.e., forest], 3 = cropland, and 4 = herbaceous vegetation [i.e., grassland]).</li> <li>"IUCNLevel" -- the full IUCN Level 2 habitat type name. </li> <li>"code" -- the IUCN Level 2 habitat code. </li> </ol> <h3>habitat_age_req_coded.csv</h3> <p>This tabular file lists whether each species was determined (by R. Alex Wiebe [AW] and Christopher L. Crawford [CLC]) to be a "mature forest obligate" (i.e., requiring forest older than 30 years, our time series length) or not. Species determined to be "mature forest obligate" species were excluded from our final analysis. The file includes 11 columns: </p> <ol> <li>"vert_class" -- Vertebrate class ("bird" or "mam" [mammal])</li> <li>"binomial" -- Species' binomial scientific name containing genus and species.</li> <li>"common_names" -- Species' common names listed by IUCN.</li> <li>"mature_forest_obl" -- Whether a species is determined to be a "mature forest obligate" species (1) or not (0). Some species are marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty, but these were rounded to the nearest integer for the final analysis.</li> <li>"water_obl" -- Whether a species is determined to be a "water obligate" species (1) or not (0). Some species were marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty. Note: this field was not used in the analysis.</li> <li>"habitat" -- The description of the species' habitat, drawn from individual IUCN assessments (see https://www.iucnredlist.org/).</li> <li>"site_presence" -- Where each species is present across our 11 study sites.</li> <li>"suitable_habitats" -- A list of IUCN Level 2 habitat types consider suitable habitat by each species.</li> <li>"major_habitats" -- A list of IUCN Level 2 habitat types listed as having "Major Importance" for that species.</li> <li>"coder" -- The author that assigned the mature forest obligate and water obligate codes ("AW" = R. Alex Wiebe, "CLC" = Christopher L. Crawford).</li> <li>"Chris_notes" -- A text field contains notes on coding process.</li> </ol> <h3>centroids_df.csv</h3> <p>This is a simple tabular dataset containing the longitude and latitude of the centroid of each bird and mammal species' range that overlaps with one of my sites. Columns include "binomial," which lists each species binomial scientific name, "centroid_longitude," and centroid_latitude." Centroid positions were calculated in QGIS using species range files from IUCN and BirdLife International.</p> <h3><br>aoh_l.parquet</h3> <p>This tabular file contains the raw AOH results produced using the script "cluster/aoh.R." This file contains the area of each suitable IUCN Level 2 habitat for each bird and mammal species at each site in each year of our time series (1987-2017), calculated across a range of calculations and scenarios. This file includes the primary data that serve as inputs for much of the rest of the analysis. The overall area of habitat for each species in each year at each site (a tabular data file named "aoh") summed across suitable habitat types and filtered to include or exclude passage areas for migratory birds, is calculated from "aoh_l" in the "AOH.Rmd" script in code chunks "filter-aoh-suitability-by-season" and "**calculate-aoh" (similarly to other derived datasets that serve as inputs for various parts of the analysis). This "aoh" file provides input data for the linear models used to extract AOH trends and test for significance. "aoh_l.parquet" includes 20 columns: </p> <ol> <li>"aoh_type" -- A label indicating the temporal and spatial scale at which AOH is calculated: "crop_abn_iucn" (Calc. 1a), "crop_abn_potential_iucn" (Calc. 1b), "max_abn_iucn" (Calc. 2a), "max_potential_abn_iucn" (Calc. 2b), "full_iucn" (Calc. 3a), and "full_potential_iucn" (Calc. 3b). "abn_iucn" and "potential_abn_iucn" correspond to calculations that only capture habitat following abandonment (i.e., not including habitat provided by croplands prior to abandonment); these calculations are not included in our final analysis.</li> <li>"vert_class" -- Vertebrate class ("amp," amphibians; "bird," birds; or "mam," mammals). Note that only birds and mammals were included in our final analysis.</li> <li>"site" -- One of our 11 study sites (see above).</li> <li>"binomial" -- Species binomial scientific name.</li> <li>"year" -- Year for which AOH is calculated (1987-2017).</li> <li>"map_code" -- Code indicating the IUCN Level 2 habitat associated with the area statistic. See "iucn_lc_crosswalk.csv."</li> <li>"season" -- Seasonal code indicating the season in which a species considers the habitat to be suitable, drawn from IUCN. Codes are: 1 ("Resident"), 2 ("Breeding") (2), "Non-breeding Season" (3), Passage (4), and Seasonal Occurrence Uncertain (5)</li> <li>"area" -- Area of Habitat, in hectares (ha).</li> <li>"mature_forest_obl" -- Whether a species is determined to be a "mature forest obligate" species (1) or not (0), drawn directly from "habitat_age_req_coded.csv" (see above). Some species are marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty, but these were rounded to the nearest integer for the final analysis.</li> <li>"redlistCategory" -- IUCN Red List Category: "Extinct," "Extinct in the Wild," "Critically Endangered," "Endangered," "Vulnerable," "Near Threatened," "Least Concern," "Data Deficient," or "Not Evaluated."</li> <li>"IUCN_aoh_ha" -- [Unused] A preliminary summation of all habitat area for each species in each year, prior to filtering. We did not use this field in our analysis. Our final AOH calculation involved first filtering out mismatched season and habitat suitability combinations.</li> <li>"time" -- The time required for the area of habitat calculation (in seconds).</li> <li>"className" -- Vertebrate class: "AMPHIBIA," "AVES," or "MAMMALIA."</li> <li>"category" -- Duplicate field for IUCN Red List Category, unused.</li> <li>"core_index" -- An index used to assign specific AOH calculations to run in parallel across multiple computing cores on Princeton's High-Performance Computing Cluster.</li> <li>"total_range_area" -- The species total range area, in square kilometers (km^2), calculated across all range polygons for each species provided by IUCN and BirdLife International. See "cluster/calc_range_area.R."</li> <li>"range_size_quantile" -- A numerical index representing global species range size quantiles, within each class. Values range from 0 (the smallest global range within a class) to 1 (the largest global range within a class). These quantiles are used to define "small-ranged species," as species with global range sizes smaller than the median global range size in their class. See "cluster/calc_range_area.R."</li> <li>"water_obl" -- Whether a species is determined to be a "water obligate" species (1) or not (0). Some species were marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty. Note: this field was not used in the analysis. Drawn directly from "habitat_age_req_coded.csv" (see above).</li> <li>"coder" -- The author that assigned the mature forest obligate and water obligate codes ("AW" = R. Alex Wiebe, "CLC" = Christopher L. Crawford). Drawn directly from "habitat_age_req_coded.csv" (see above).</li> <li>"common_names" -- Species' common names listed by IUCN, drawn directly from "habitat_age_req_coded.csv" (see above).</li> </ol> <h3><br>aoh_feols.parquet</h3> <p>This tabular data contains the results of linear regressions predicting area of habitat as a function of time. We parameterized models for each species in each site for each of the 6 AOH calculation types described above and in Crawford et al. 2024 (Calculations 1a, 1b, 2a, 2b, 3a, and 3b). We used the R package {fixest} to parameterize these ordinary least squares (OLS) linear regressions, using the Newey-West estimator to calculate standard errors. We used the R package {broom} to extract ("tidy") the model coefficient estimates and statistics. See "AOH.Rmd" chunk {r **feols}. This file includes 20 columns:</p> <ol> <li>"term" -- The name of the regression term: "(Intercept)" or slope ("year0").</li> <li>"estimate" -- The estimated value of the regression term.</li> <li>"std.error" -- The standard error of the regression term.</li> <li>"statistic" -- The value of a T-statistic to use in a hypothesis that the regression term is non-zero.</li> <li>"p.value" -- The two-sided p-value associated with the observed statistic.</li> <li>"conf.low" -- Lower bound on the confidence interval for the estimate (in our case 5%).</li> <li>"conf.high" -- Upper bound on the confidence interval for the estimate (in our case, 95%).</li> <li>"aoh_type" -- A label indicating the temporal and spatial scale at which AOH is calculated: "crop_abn_iucn" (Calc. 1a), "crop_abn_potential_iucn" (Calc. 1b), "max_abn_iucn" (Calc. 2a), "max_potential_abn_iucn" (Calc. 2b), "full_iucn" (Calc. 3a), and "full_potential_iucn" (Calc. 3b). "abn_iucn" and "potential_abn_iucn" correspond to calculations that only capture habitat following abandonment (i.e., not including habitat provided by croplands prior to abandonment); these calculations are not included in our final analysis.</li> <li>"run_index" -- An index used to easily pull observations for each model run. There is one index for each unique species at each site, in each of the aoh_types, calculated including and excluding passage areas.</li> <li>"vert_class" -- Vertebrate class ("amp," amphibians; "bird," birds; or "mam," mammals). Note that only birds and mammals were included in our final analysis.</li> <li>"site" -- One of our 11 study sites (see above).</li> <li>"binomial" -- Species binomial scientific name.</li> <li>"n_obs" -- The number of observations included in the model run.</li> <li>"n_unique_obs" -- The number of unique observations included in the model run (used to exclude species with constant AOH).</li> <li>"redlistCategory" -- IUCN Red List Category: "Extinct," "Extinct in the Wild," "Critically Endangered," "Endangered," "Vulnerable," "Near Threatened," "Least Concern," "Data Deficient," or "Not Evaluated."</li> <li>"mature_forest_obl" -- Whether a species is determined to be a "mature forest obligate" species (1) or not (0), drawn directly from "habitat_age_req_coded.csv" (see above). Some species are marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty, but these were rounded to the nearest integer for the final analysis.</li> <li>"common_names" -- Species' common names listed by IUCN, drawn directly from "habitat_age_req_coded.csv" (see above).</li> <li>"start_year" -- The first year for which this species has area of habitat at this site (i.e., the first observation included in the model).</li> <li>"end_year" -- The last year for which this species has area of habitat at this site (i.e., the last observation included in the model).</li> <li>"passage_type" -- Whether a model run includes passage areas ("include_passage") or does not include passage areas ("exclude_passage") when calculating area of habitat (AOH) for migratory birds.</li> </ol> <p><br><strong>Two files contain model effect sizes for AOH models:</strong></p> <h3>aoh_start_end_l.parquet</h3> <p>This tabular data file contains observed effect sizes: the observed change in AOH for each species at each site, in each calculation, derived directly from observations from the start and end of the time series. These data are calculated in "AOH.Rmd" chunk: {r observed-change-in-aoh-by-window-size}. This data serves as direct input for the file "aoh_obs_change_tmp_all" (see below), which is the primary input for the traits linear models in our analysis (see "traits.Rmd", "_util_files.R"). This file contains 24 columns:</p> <ol> <li>"run_index" -- An index used to easily pull observations for each model run. There is one index for each unique species at each site, in each of the aoh_types, calculated including and excluding passage areas.</li> <li>"start" -- The mean area of habitat (AOH), in hectares (ha), at the "start" of the time series, as calculated across the number of years specified in "window_size."</li> <li>"start_year" -- The year of the first AOH observation.</li> <li>"end" -- The mean area of habitat (AOH), in hectares (ha), at the "end" of the time series, as calculated across the number of years specified in "window_size."</li> <li>"end_year" -- The year of the last AOH observation.</li> <li>"window_size" -- The number of years across which "start" and "end" AOH values are averaged (e.g., if "window_size" is 5, "start" is then the mean AOH across the first 5 years of observations, and "end" is the mean AOH across the last 5 years of observations).</li> <li>"abs_change" -- The absolute change in AOH, calculated as the difference between the mean AOH at the end of the time series and the mean AOH at the start of the time series (i.e., end - start).</li> <li>"prop_change" -- The proportional change in AOH, calculated as the absolute change in AOH divided by the AOH value at the start of the time series (i.e., abs_change/start).</li> <li>"percent_change" -- The percent change in AOH, calculated as 100 times the proportional change in AOH (i.e., 100 * prop_change).</li> <li>"ratio" -- The ratio of the mean AOH at the end of the time series to the mean AOH at the start of the time series (i.e., end/start).</li> <li>"ratio_mod" -- A modified ratio of the ending AOH to the starting AOH, for which ratio values less than 1 are replaced by additive inverse of the reciprocal value (i.e., 1/ratio * -1). Ratios greater than 1 are left the same.</li> <li>"abs_change_as_prop_site_area" -- The absolute change in AOH as a proportion of site area (i.e., abs_change / total_site_area_ha_2017).</li> <li>"aoh_type" -- A label indicating the temporal and spatial scale at which AOH is calculated: "crop_abn_iucn" (Calc. 1a), "crop_abn_potential_iucn" (Calc. 1b), "max_abn_iucn" (Calc. 2a), "max_potential_abn_iucn" (Calc. 2b), "full_iucn" (Calc. 3a), and "full_potential_iucn" (Calc. 3b). "abn_iucn" and "potential_abn_iucn" correspond to calculations that only capture habitat following abandonment (i.e., not including habitat provided by croplands prior to abandonment); these calculations are not included in our final analysis.</li> <li>"vert_class" -- Vertebrate class ("amp," amphibians; "bird," birds; or "mam," mammals). Note that only birds and mammals were included in our final analysis.</li> <li>"site" -- One of our 11 study sites (see above).</li> <li>"binomial" -- Species binomial scientific name.</li> <li>"passage_type" -- Whether a model run includes passage areas ("include_passage") or does not include passage areas ("exclude_passage") when calculating area of habitat (AOH) for migratory birds.</li> <li>"common_names" -- Species' common names listed by IUCN, drawn directly from "habitat_age_req_coded.csv" (see above).</li> <li>"redlistCategory" -- IUCN Red List Category: "Extinct," "Extinct in the Wild," "Critically Endangered," "Endangered," "Vulnerable," "Near Threatened," "Least Concern," "Data Deficient," or "Not Evaluated."</li> <li>"mature_forest_obl" -- Whether a species is determined to be a "mature forest obligate" species (1) or not (0), drawn directly from "habitat_age_req_coded.csv" (see above). Some species are marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty, but these were rounded to the nearest integer for the final analysis.</li> <li>"total_site_area_ha_2017" -- The total site area (ha) in 2017. (Drawn directly from "area_summary_df," from https://zenodo.org/records/5348287)</li> <li>"area_ever_abn_ha" -- The total area of those pixels that were abandoned at least once during the time series (corresponding to the area of potential abandonment, as of 2017). (Drawn directly from "area_summary_df," from https://zenodo.org/records/5348287)</li> <li>"trend" -- The overall trend in AOH ("gain," "loss," or "no trend"), determined by the sign of slope coefficients and statistical significance at p < 0.05.</li> <li>"factor_change" -- The factor change in AOH, calculated as either the proportional change in AOH (i.e., prop_change) for values greater than 0, or as the reciprocal of the proportional change in AOH (i.e., 1/prop_change) for values greater than 0.</li> </ol> <h3>aoh_change_df.parquet</h3> <p>This tabular data file contains effect sizes estimated from linear regression coefficients (i.e., slopes and intercepts), calculated in "AOH.Rmd" chunk {r estimated-changes-aoh-change-df}. This file contains 29 columns:</p> <ol> <li>"run_index" -- An index used to easily pull observations for each model run. There is one index for each unique species at each site, in each of the aoh_types, calculated including and excluding passage areas.</li> <li>"est_type" -- The estimate type, whether the estimated model slope ("estimate") or the lower ("conf.low") or upper ("conf.high") bounds of the 95% confidence interval around the slope estimate.</li> <li>"vert_class" -- Vertebrate class ("amp," amphibians; "bird," birds; or "mam," mammals). Note that only birds and mammals were included in our final analysis.</li> <li>"site" -- One of our 11 study sites (see above).</li> <li>"start_year" -- The year of the first AOH observation.</li> <li>"end_year" -- The year of the last AOH observation.</li> <li>"slope" -- The model estimated slope value.</li> <li>"intercept" -- The model estimated intercept value.</li> <li>"aoh_type" -- A label indicating the temporal and spatial scale at which AOH is calculated: "crop_abn_iucn" (Calc. 1a), "crop_abn_potential_iucn" (Calc. 1b), "max_abn_iucn" (Calc. 2a), "max_potential_abn_iucn" (Calc. 2b), "full_iucn" (Calc. 3a), and "full_potential_iucn" (Calc. 3b). "abn_iucn" and "potential_abn_iucn" correspond to calculations that only capture habitat following abandonment (i.e., not including habitat provided by croplands prior to abandonment); these calculations are not included in our final analysis.</li> <li>"passage_type" -- Whether a model run includes passage areas ("include_passage") or does not include passage areas ("exclude_passage") when calculating area of habitat (AOH) for migratory birds.</li> <li>"binomial" -- Species binomial scientific name.</li> <li>"mature_forest_obl" -- Whether a species is determined to be a "mature forest obligate" species (1) or not (0), drawn directly from "habitat_age_req_coded.csv" (see above). Some species are marked as 0.9, 0.75, 0.25, or 0.1 as an indication of some uncertainty, but these were rounded to the nearest integer for the final analysis.</li> <li>"total_site_area_ha_2017" -- The total site area (ha) in 2017. (Drawn directly from "area_summary_df," from https://zenodo.org/records/5348287)</li> <li>"area_ever_abn_ha" -- The total area of those pixels that were abandoned at least once during the time series (corresponding to the area of potential abandonment, as of 2017). (Drawn directly from "area_summary_df," from https://zenodo.org/records/5348287)</li> <li>"trend" -- The trend in AOH experienced by the species at this site for this aoh_type calculation ("gain," "loss," or "no trend"), determined by the sign of slope coefficients and assigning statistical significance when p < 0.05.</li> <li>"n_trends" -- The number of distinct trends in AOH experienced by the species across all of the sites overlapping with its range, including this site.</li> <li>"trend_types" -- The types of trends in AOH experienced by this species across all sites overlapping with its range (some combination of "gain", "loss", and/or "no trend").</li> <li>"overall_trend" -- The overall trend in AOH experienced by this species across all sites overlapping with its range ("gain" - experiencing "gain" trends at all occurring sites; "loss" - experiencing "loss" trends at all occurring sites; "no trend" - experiencing "no trend" at all occurring sites; "weak gain" - experiencing "gain" trends at some sites and "no trend" at others; "weak loss" - experiencing "loss" trends at some sites and "no trend" at others; or "context dependent" - experienced "gain" trends at some sites and "loss" trends at other sites [referred to as "mixed" effects in Crawford et al. 2024])</li> <li>"trend_direction" -- The general direction of the trend in AOH for the species across all occurring sites ("gain" when overall_trend is either "gain" or "weak_gain"; "loss" when overall_trend is either "loss" or "weak_loss"; "context dependent" when overall_trend is "context dependent" [i.e., "mixed" effects]; and "no trend" when overall_trend is "no trend").</li> <li>"trend_consistency" -- An indication of how consistent the trend in AOH is across all occurring sites ("consistent" if overall_trend is "gain" or "loss"; "weak" if "weak_gain" or "weak_loss"; and "opposite" if "context dependent" [i.e., "mixed" effects]).</li> <li>"time_range" -- The number of years for which the species has AOH observations at this site for this aoh_type calculations.</li> <li>"aoh_start_est" -- The estimated AOH at the start of the time series, calculated from linear regression slope and intercept coefficients.</li> <li>"aoh_end_est" -- The estimated AOH at the end of the time series, calculated from linear regression slope and intercept coefficients.</li> <li>"abs_change" -- The absolute change in estimated AOH over the course of the time series (i.e., aoh_end_est - aoh_start_est).</li> <li>"abs_change_as_prop_site_area" -- The absolute change in estimated AOH as a proportion of site area (i.e., abs_change / total_site_area_ha_2017).</li> <li>"ratio_change" -- The ratio of the estimated AOH at the end of the time series to the estimated AOH at the start of the time series (i.e., aoh_end_est / aoh_start_est).</li> <li>"prop_change" -- The proportional change in estimated AOH, calculated as the absolute change in estimated AOH divided by the estimated AOH value at the start of the time series (i.e., abs_change / aoh_start_est).</li> <li>"factor_change" -- The factor change in estimated AOH, calculated as either the proportional change in estimated AOH (i.e., prop_change) for values greater than 0, or as the reciprocal of the proportional change in estimated AOH (i.e., 1/prop_change) for values greater than 0.</li> <li>"percent_change" -- The percent change in estimated AOH, calculated as 100 times the proportional change in estimated AOH (i.e., 100 * prop_change).</li> </ol> <h3>taxonomy_df.parquet</h3> <p>This tabular data file contains basic taxonomic information used in the analysis, including 10 columns:</p> <ol> <li>"vert_class" -- Vertebrate class ("bird," birds; or "mam," mammals).</li> <li>"binomial" -- Species binomial scientific name, drawn from IUCN or BirdLife International.</li> <li>"redlistCategory" -- IUCN Red List Category: "Extinct," "Extinct in the Wild," "Critically Endangered," "Endangered," "Vulnerable," "Near Threatened," "Least Concern," "Data Deficient," or "Not Evaluated."</li> <li>"order" -- Taxonomic order.</li> <li>"family" -- Taxonomic family.</li> <li>"n_sp_in_family_sample" -- The number of species contained in the family included in our analysis.</li> <li>"order_common" -- A common name to refer to the order.</li> <li>"family_common" -- A common name to refer to the family.</li> <li>"n_in_family" -- The total number of species contained in the family globally.</li> <li>"threatened" -- Whether a species is considered threatened with extinction (i.e., is listed as "Critically Endangered," "Endangered," or "Vulnerable" on the IUCN Red List).</li> </ol> <h3><br>aoh_obs_change_tmp_all.csv<br>aoh_est_change_tmp_all.csv</h3> <p>These two tabular data files contain data used as inputs for the linear models involved in our traits analysis exploring how species' responses to cropland abandonment are affected by habitat suitabilities and other traits. The key variables are the response variables for our models ("binary_gain_v_loss", "abs_change_percent_site", and "log(ratio)") and predictor variables c("forest_occ", "savanna_occ", "shrubland_occ", "grassland_occ", "wetlands_occ", "rocky_occ", "caves_occ", "desert_occ", "urban_occ", "arable_occ", "n_suitable_habitats_lvl2", "vert_class", "threatened", "Trophic_level", "log10(Body_mass_g)", "log10(total_range_area)", "abs(centroid_latitude)", and "max_abn_ext_percent_site"). Further details are contained in "traits.Rmd"</p> <p>These two files are developed from "aoh_start_end_l" and "aoh_change_df," but filtered to include only birds and mammals, to exclude passage areas from AOH calculations, to exclude mature forest obligate species, and to use only a window_size of 5 years (for "aoh_obs_change_tmp_all") and model estimates (rather than 95% confidence interval bounds, for "aoh_est_change_tmp_all"). </p> <p><strong>aoh_obs_change_tmp_all.csv contains 63 columns.</strong></p> <ul> <li>Columns 1-24 match "aoh_start_end_l". </li> <li>Columns 25-31 match "taxonomy_df" columns 3 through 10.</li> <li>Columns 32-34: "Body_mass_g" (species body mass, in grams), "Trophic_level" (whether a species is a "Carnivore", a "Herbivore," or an "Omnivore"), and "Habitat_breadth_IUCN" (the number of IUCN Level 2 habitats a species can occupy) were taken from from Etard et al. 2020 (https://doi.org/10.1111/geb.13184)</li> <li>Column 35: "total_range_area" -- drawn from "aoh_l," see above</li> <li>Columns 36-37: "centroid_longitude" and "centroid_latitude" are drawn from "centroids_df," see above.</li> <li>Columns 38-50 are Boolean variables that indicate whether a species can occupy a specific IUCN Level 1 habitat type (i.e., whether IUCN lists that Level 1 habitat as suitable for the species). These variables are as follows, with the IUCN Level 1 habitat code listed in brackets: "forest_occ" [1], "savanna_occ" [2], "shrubland_occ" [3], "grassland_occ" [4], "wetlands_occ" [5], "rocky_occ" [6], "caves_occ" [7], "desert_occ" [8], "marine_intertidal_occ"[12], "marine_coastal_occ" [13], "artificial_terrestrial_occ" [14], "artificial_aquatic_occ" [15], and "introduced_occ" [16].</li> <li>Columns 51-52 represent the number of IUCN Level 1 ("n_suitable_habitats") and IUCN Level 2 ("n_suitable_habitats_lvl2") habitats a species has listed as suitable habitats by IUCN, respectively.</li> <li>Columns 53-56 are Boolean variables indicating whether a species can occupy a subset of IUCN Level 2 habitats, which are listed in brackets: "arable_occ" [14.1 Arable Land]; "farmland_occ" [14.1 Arable Land, 14.2 Pastureland, or 14.4 Rural Gardens]; "ag_occ" (duplicate of "farmland_occ"); "urban_occ" [14.5 Urban Areas].</li> <li>Columns 57-58 represent the maximum spatial extent of abandonment at a give site (i.e., the area of all lands that were abandoned at least once during the time series), whether divided by site area ("max_abn_extent_div_site_area," i.e,. area_ever_abn_ha / total_site_area_ha_2017) or as a percent of site area ("max_abn_ext_percent_site").</li> <li>Column 59 is "abs_change_percent_site," calculated as 100 * abs_change_as_prop_site_area.</li> <li>Columns 60-63 are binary values (1 or 0) indicating the whether the species experienced statistically significant gains in AOH ("binary_trend_gain"), statistically significant losses in AOH ("binary_trend_loss"), no trend in AOH ("binary_trend_no_trend"). Column 63 ("binary_gain_v_loss") is a binary value assigning a value of 1 for gains, 0 for losses, and NA for other values.</li> </ul> <p><br><strong>aoh_est_change_tmp_all.csv contains 70 columns:</strong></p> <ul> <li>Columns 1-29 match "aoh_change_df".</li> <li>Columns 30-37 match "taxonomy_df" columns 3 through 10.</li> <li>Columns 38-40: "Body_mass_g" (species body mass, in grams), "Trophic_level" (whether a species is a "Carnivore", a "Herbivore," or an "Omnivore"), and "Habitat_breadth_IUCN" (the number of IUCN Level 2 habitats a species can occupy) were taken from from Etard et al. 2020 (https://doi.org/10.1111/geb.13184)</li> <li>Column 41: "total_range_area" -- drawn from "aoh_l," see above</li> <li>Columns 42-43: "centroid_longitude" and "centroid_latitude" are drawn from "centroids_df," see above.</li> <li>Columns 44-56 are Boolean variables that indicate whether a species can occupy a specific IUCN Level 1 habitat type (i.e., whether IUCN lists that Level 1 habitat as suitable for the species). These variables are as follows, with the IUCN Level 1 habitat code listed in brackets: "forest_occ" [1], "savanna_occ" [2], "shrubland_occ" [3], "grassland_occ" [4], "wetlands_occ" [5], "rocky_occ" [6], "caves_occ" [7], "desert_occ" [8], "marine_intertidal_occ"[12], "marine_coastal_occ" [13], "artificial_terrestrial_occ" [14], "artificial_aquatic_occ" [15], and "introduced_occ" [16].</li> <li>Columns 57-58 represent the number of IUCN Level 1 ("n_suitable_habitats") and IUCN Level 2 ("n_suitable_habitats_lvl2") habitats a species has listed as suitable habitats by IUCN, respectively.</li> <li>Columns 59-62 are Boolean variables indicating whether a species can occupy a subset of IUCN Level 2 habitats, which are listed in brackets: "arable_occ" [14.1 Arable Land]; "farmland_occ" [14.1 Arable Land, 14.2 Pastureland, or 14.4 Rural Gardens]; "ag_occ" (duplicate of "farmland_occ"); "urban_occ" [14.5 Urban Areas].</li> <li>Columns 63-64 represent the maximum spatial extent of abandonment at a give site (i.e., the area of all lands that were abandoned at least once during the time series), whether divided by site area ("max_abn_extent_div_site_area," i.e,. area_ever_abn_ha / total_site_area_ha_2017) or as a percent of site area ("max_abn_ext_percent_site").</li> <li>Columns 65-68 are binary values (1 or 0) indicating the whether the species experienced statistically significant gains in AOH ("binary_trend_gain"), statistically significant losses in AOH ("binary_trend_loss"), no trend in AOH ("binary_trend_no_trend"). Column 63 ("binary_gain_v_loss") is a binary value assigning a value of 1 for gains, 0 for losses, and NA for other values.</li> <li>Column 69, "slope_prop_site", is the estimated linear regression coefficient, or slope, as a proportion of site area, calculated as slope / total_site_area_ha_2017. </li> <li>Column 70 is "abs_change_percent_site," calculated as 100 * abs_change_as_prop_site_area.</li> </ul> <h3><br>final_species_list.csv</h3> <p>The final list of bird and mammal species included in our analysis, including the vertebrate class ("vert_class") and binomial species scientific name ("binomial") along with the overall response to cropland abandonment ("overall_trend"), the sites where that species had AOH affected by cropland abandonment ("sites"), the IUCN Red List Category ("redlistCategory"), the "obligate_type" (i.e., whether a species is a mature forest obligate, or not), the "range_size_quantile" (ranking species by global geographic range size), and "common_names". Note that mature forest obligates were excluded from our final results. These columns match the definitions included above.</p> <h3>trait_mod_df_modx1.rds</h3> <p>This R data file contains the results of our regression models run in "traits.Rmd" code chunk "*many-models", which is where our three traits linear regression models are run. These data are contained in the form of a nested tibble, or a set of tibbles nested within columns of a tibble (see: https://tidyr.tidyverse.org/articles/nest.html). These data include the input data ("data"), resulting models ("model"), model coefficients ("tidy"), regression tables ("gt"), and diagnostic statistics ("glance") for our many model runs across different response variables ("response") and AOH calculations ("aoh_type"). See "traits.Rmd" code chunk "*many-models" for more information.</p>
Annual maps of cropland abandonment, land cover, and other derived data for time-series analysis of cropland abandonment
<p>This archive contains raw annual land cover maps, cropland abandonment maps, and accompanying derived data products to support:</p> <blockquote> <p>Crawford C.L., Yin, H., Radeloff, V.C., and Wilcove, D.S. 2022. Rural land abandonment is too ephemeral to provide major benefits for biodiversity and climate. <em>Science Advances</em> <a href="https://doi.org/10.1126/sciadv.abm8999">doi.org/10.1126/sciadv.abm8999</a><em>.</em></p> </blockquote> <p>An archive of the analysis scripts developed for this project can be found at: <a href="https://github.com/chriscra/abandonment_trajectories">https://github.com/chriscra/abandonment_trajectories</a> (<a href="https://doi.org/10.5281/zenodo.6383127">https://doi.org/10.5281/zenodo.6383127</a>).</p> <p>Note that the label "_2022_02_07" in many file names refers to the date of the primary analysis. "dts” or “dt” refer to “data.tables," large .csv files that were manipulated using the data.table package in R (Dowle and Srinivasan 2021, <a href="http://r-datatable.com/">http://r-datatable.com/</a>). “Rasters” refer to “.tif” files that were processed using the raster and terra packages in R (Hijmans, 2022; <a href="https://rspatial.org/terra/">https://rspatial.org/terra/</a>; <a href="https://rspatial.org/raster">https://rspatial.org/raster</a>).</p> <p>Data files fall into one of four categories of data derived during our analysis of abandonment: <strong>observed</strong>, <strong>potential</strong>, <strong>maximum</strong>, or <strong>recultivation</strong>. Derived datasets also follow the same naming convention, though are aggregated across sites. These four categories are as follows (using “age_dts” for our site in Shaanxi Province, China as an example):</p> <ol> <li><strong>observed</strong> abandonment identified through our primary analysis, with a threshold of five years. These files do not have a specific label beyond the description of the file and the date of analysis (e.g., shaanxi_age_2022_02_07.csv);</li> <li><strong>potential</strong> abandonment for a scenario without any recultivation, in which abandoned croplands are left abandoned from the year of initial abandonment through the end of the time series, with the label “_potential” (e.g., shaanxi_potential_age_2022_02_07.csv);</li> <li><strong>maximum</strong> age of abandonment over the course of the time series, with the label “_max” (e.g., shaanxi_max_age_2022_02_07.csv);</li> <li><strong>recultivation </strong>periods, corresponding to the lengths of recultivation periods following abandonment, given the label “_recult” (e.g., shaanxi_recult_age_2022_02_07.csv).</li> </ol> <p> </p> <p><strong>This archive includes multiple .zip files, the contents of which are described below:</strong></p> <ul> <li><strong>age_dts.zip</strong> - Maps of abandonment age (i.e., how long each pixel has been abandoned for, as of that year, also referred to as length, duration, etc.), for each year between 1987-2017 for all 11 sites. These maps are stored as .csv files, where each row is a pixel, the first two columns refer to the x and y coordinates (in terms of longitude and latitude), and subsequent columns contain the abandonment age values for an individual year (where years are labeled with "y" followed by the year, e.g., "y1987"). Maps are given with a latitude and longitude coordinate reference system. Folder contains observed age, potential age (“_potential”), maximum age (“_max”), and recultivation lengths (“_recult”) for all sites. Maximum age .csv files include only three columns: x, y, and the maximum length (i.e., “max age”, in years) for each pixel throughout the entire time series (1987-2017). Files were produced using the custom functions "cc_filter_abn_dt()," “cc_calc_max_age()," “cc_calc_potential_age(),” and “cc_calc_recult_age();” see "_util/_util_functions.R."</li> <li><strong>age_rasters.zip</strong> - Maps of abandonment age (i.e., how long each pixel has been abandoned for), for each year between 1987-2017 for all 11 sites. Maps are stored as .tif files, where each band corresponds to one of the 31 years in our analysis (1987-2017), in ascending order (i.e., the first layer is 1987 and the 31st layer is 2017). Folder contains observed age, potential age (“_potential”), and maximum age (“_max”) rasters for all sites. Maximum age rasters include just one band (“layer”). These rasters match the corresponding .csv files contained in "age_dts.zip.”</li> <li><strong>derived_data.zip</strong> - summary datasets created throughout this analysis, listed below.</li> <li><strong>diff.zip</strong> - .csv files for each of our eleven sites containing the year-to-year lagged differences in abandonment age (i.e., length of time abandoned) for each pixel. The rows correspond to a single pixel of land, and the columns refer to the year the difference is in reference to. These rows do not have longitude or latitude values associated with them; however, rows correspond to the same rows in the .csv files in "input_data.tables.zip" and "age_dts.zip." These files were produced using the custom function "cc_diff_dt()" (much like the base R function "diff()"), contained within the custom function "cc_filter_abn_dt()" (see "_util/_util_functions.R"). Folder contains diff files for observed abandonment, potential abandonment (“_potential”), and recultivation lengths (“_recult”) for all sites.</li> <li><strong>input_dts.zip</strong> - annual land cover maps for eleven sites with four land cover classes (see below), adapted from Yin et al. 2020 <em>Remote Sensing of Environment </em>(<a href="https://doi.org/10.1016/j.rse.2020.111873">https://doi.org/10.1016/j.rse.2020.111873</a>)<em>. </em>Like “age_dts,” these maps are stored as .csv files, where each row is a pixel and the first two columns refer to x and y coordinates (in terms of longitude and latitude). Subsequent columns contain the land cover class for an individual year (e.g., "y1987"). Note that these maps were recoded from Yin et al. 2020 so that land cover classification was consistent across sites (see below). This contains two files for each site: the raw land cover maps from Yin et al. 2020 (after recoding), and a “clean” version produced by applying 5- and 8-year temporal filters to the raw input (see custom function “cc_temporal_filter_lc(),” in “_util/_util_functions.R” and “1_prep_r_to_dt.R”). These files correspond to those in "input_rasters.zip," and serve as the primary inputs for the analysis.</li> <li><strong>input_rasters.zip</strong> - annual land cover maps for eleven sites with four land cover classes (see below), adapted from Yin et al. 2020 <em>Remote Sensing of Environment. </em>Maps are stored as ".tif" files, where each band corresponds one of the 31 years in our analysis (1987-2017), in ascending order (i.e., the first layer is 1987 and the 31st layer is 2017). Maps are given with a latitude and longitude coordinate reference system. Note that these maps were recoded so that land cover classes matched across sites (see below). Contains two files for each site: the raw land cover maps (after recoding), and a “clean” version that has been processed with 5- and 8-year temporal filters (see above). These files match those in "input_dts.zip."</li> <li><strong>length.zip</strong> - .csv files containing the length (i.e., age or duration, in years) of each distinct individual period of abandonment at each site. This folder contains length files for observed and potential abandonment, as well as recultivation lengths. Produced using the custom function "cc_filter_abn_dt()" and “cc_extract_length();” see "_util/_util_functions.R."</li> </ul> <p><strong>derived_data.zip</strong> contains the following files:</p> <ul> <li>"<strong>site_df.csv</strong>" - a simple .csv containing descriptive information for each of our eleven sites, along with the original land cover codes used by Yin et al. 2020 (updated so that all eleven sites in how land cover classes were coded; see below).</li> <li><strong>Primary derived datasets </strong>for both observed abandonment (“area_dat”) and potential abandonment (“potential_area_dat”). <ul> <li><strong>area_dat</strong> - Shows the area (in ha) in each land cover class at each site in each year (1987-2017), along with the area of cropland abandoned in each year following a five-year abandonment threshold (abandoned for >=5 years) or no threshold (abandoned for >=1 years). Produced using custom functions "cc_calc_area_per_lc_abn()" via "cc_summarize_abn_dts()". See scripts "cluster/2_analyze_abn.R" and "_util/_util_functions.R."</li> <li><strong>persistence_dat</strong> - A .csv containing the area of cropland abandoned (ha) for a given "cohort" of abandoned cropland (i.e., a group of cropland abandoned in the same year, also called "year_abn") in a specific year. This area is also given as a proportion of the initial area abandoned in each cohort, or the area of each cohort when it was first classified as abandoned at year 5 ("initial_area_abn"). The "age" is given as the number of years since a given cohort of abandoned cropland was last actively cultivated, and "time" is marked relative to the 5th year, when our five-year definition first classifies that land as abandoned (and where the proportion of abandoned land remaining abandoned is 1). Produced using custom functions "cc_calc_persistence()" via "cc_summarize_abn_dts()". See scripts "cluster/2_analyze_abn.R" and "_util/_util_functions.R." This serves as the main input for our linear models of recultivation (“decay”) trajectories.</li> <li><strong>turnover_dat</strong> - A .csv showing the annual gross gain, annual gross loss, and annual net change in the area (in ha) of abandoned cropland at each site in each year of the time series. Produced using custom functions "cc_calc_abn_diff()" via "cc_summarize_abn_dts()" (see "_util/_util_functions.R"), implemented in "cluster/2_analyze_abn.R." This file is only produced for observed abandonment.</li> </ul> </li> <li><strong>Area summary files </strong>(for observed abandonment only) <ul> <li><strong>area_summary_df</strong> - Contains a range of summary values relating to the area of cropland abandonment for each of our eleven sites. All area values are given in hectares (ha) unless stated otherwise. It contains 16 variables as columns, including 1) "site," 2) "total_site_area_ha_2017" - the total site area (ha) in 2017, 3) "cropland_area_1987" - the area in cropland in 1987 (ha), 4) "area_abn_ha_2017" - the area of cropland abandoned as of 2017 (ha), 5) "area_ever_abn_ha" - the total area of those pixels that were abandoned at least once during the time series (corresponding to the area of potential abandonment, as of 2017), 6) "total_crop_extent_ha" - the total area of those pixels that were classified as cropland at least once during the time series, 7) "total_area_abn_remaining_2017" - duplicate of "area_abn_ha_2017," the area abandoned as of 2017 (ha), taken from "area_recult_threshold," 8) "total_initial_area_abn" - the sum of the initial area of each cohort of abandonment when it is first classified as "abandoned," i.e., at the 5 year mark (note that this is cumulative, and because it counts those pixels that were abandoned more than once, it is therefore larger than "area_ever_abn_ha"), taken from "area_recult_threshold" 9) "total_area_abn_recultivated_2017" - the area of abandoned land that was recultivated as of 2017 (cumulatively, i.e., "total_initial_area_abn" - "area_abn_ha_2017"), taken from "area_recult_threshold," 10) "proportion_recultivated" - the proportion of all abandoned cropland (including multiple periods per pixel) that was recultivated by 2017, taken from "area_recult_threshold," 11) "area_2017_as_prop_site" - area abandoned as of 2017 as a proportion of the total site area, 12) "area_2017_as_prop_total_crop" - area abandoned as of 2017 as a proportion of the total crop extent, 13) "area_2017_as_prop_crop87" - area abandoned as of 2017 as a proportion of cropland area in 1987, 14) "area_ever_abn_as_prop_site" - area ever abandoned as a proportion of the total site area, 15) "area_ever_abn_as_prop_total_crop" - area ever abandoned as a proportion of the total crop extent, 16) "area_ever_abn_as_prop_crop87" - area ever abandoned as a proportion of cropland area in 1987. See script "1_summary_stats.Rmd."</li> <li><strong>area_recult_threshold</strong> - Contains data on the proportion of observed abandoned cropland area that is recultivated by the end of our time series. This includes the area of abandoned cropland as of 2017 ("total_area_abn_remaining_2017") and the sum of the initial area of each cohort of abandonment when it is first classified as abandoned (at year 5; "total_initial_area_abn"). This "total_initial_area_abn" is cumulative, and allows for pixels that were abandoned multiple times during the time series to be counted multiple times. The difference between these two columns yields the "total_area_abn_recultivated_2017," which in turn is used to calculate the "proportion_recultivated," and the (ascending) "order" of sites based on this proportion. This file includes recultivation stats for each site for three abandonment definitions: 5, 7, and 10 years. See script "1_summary_stats.Rmd."</li> <li><strong>abn_lc_area_2017</strong> - Contains the number of pixels and corresponding area (in ha) of abandoned cropland in the year 2017 at each site, according to the land cover class (either woody vegetation [2], or herbaceous vegetation [4]) and the age in 2017 (5 to 30 years). See script "cluster/6_lc_of_abn.R."</li> <li><strong>abn_prop_lc_2017 </strong>- Contains the number of pixels and corresponding area (ha) of cropland abandoned in the year 2017 in each land cover type (woody vegetation [2], or herbaceous vegetation [4]). It also shows this area as a proportion of the total area abandoned at each site (i.e., in either land cover class: 2 or 4). See script "cluster/6_lc_of_abn.R."</li> </ul> </li> <li><strong>Carbon</strong> <ul> <li><strong>carbon_df </strong>– contains the observed and potential carbon accumulation in abandoned croplands in each site in each year (in Mg C), for two abandonment thresholds: 5 years (our default abandonment definition) and 1 year (i.e., no threshold). Each data point corresponds to one of two scenarios (“type” column), either “observed” or “potential.” Carbon accumulation figures are for both the sum of forest and soil carbon at each site in a given year. Carbon accumulation is listed in three columns: 1) “C_up_to_20” contains the total carbon accumulated in those abandoned croplands with abandonment durations between 5 and 20 years. 2) “C_21_30” contains the total carbon accumulation in croplands with durations between 21 and 30 years, which are differentiated in order to account for non-linear carbon accumulation rates in soils over time, and 3) “total_C_Mg” contains the sum of the previous two columns, representing the total carbon accumulated across all abandoned croplands in each year.</li> <li><strong>soc_mean</strong> – contains mean soil organic carbon accumulation rates for years 1-20 and years 21-80, derived from Sanderman et al. 2020 (in Mg C; <a href="https://doi.org/10.7910/DVN/HA17D3">https://doi.org/10.7910/DVN/HA17D3</a>). These values correspond to accumulation rates in croplands upon abandonment and regeneration to natural vegetation (Sanderman et al. 2020’s “rewilding” scenario). These mean values are calculated across those pixels identified as cropland by Sanderman et al. 2020 at each site. Mean values in year 20 and 80 are contained in columns “mean_soc_20” and “mean_soc_80” respectively, and the annualized rate over the first 20 years and the subsequent years 21 through 80 are contained in columns “mean_annual_soc_1_20” and “mean_annual_soc_21_80” respectively.</li> </ul> </li> <li><strong>Decay model data</strong> – two R data files containing data products for our linear models of abandonment recultivation trajectories. <ul> <li><strong>decay_endpoints_files</strong> – an R data file (.rds) containing seven data products produced as part of our common endpoint analysis, which calculated mean trajectories for each site across a range of common endpoints, ensuring that means were based on coefficient estimates derived from a consistent number of observations for each cohort. These files are: <ul> <li><strong>common_endpoint_dat – </strong>a .csv containing subsets of “persistence_dat” for each “endpoint” (7 through 29).</li> <li><strong>endpoint_n – </strong>a .csv describing, for each endpoint, the corresponding number of observations per cohort (“n_obs”), the number of cohorts (“n_cohorts”), the total number of observations across cohorts included (“total_obs”), and the cohorts that meet the endpoint threshold (“cohorts”).</li> <li><strong>coef_l3_endpoints – </strong>corresponding model coefficients for our primary model (“l3”) parameterized by the range of subsets across endpoints.</li> <li><strong>augment_endpoints – </strong>fitted values (i.e., model predictions) for linear models produced across the full range of endpoint subsets.</li> <li><strong>fitted_endpoints – </strong>a simplified .csv containing the mean linear and log coefficients for each site at each endpoint, and the corresponding predicted proportion remaining abandoned through time (based on the “age,” or duration, of abandonment).</li> <li><strong>time_to_endpoints – </strong>a .csv containing, for mean trajectories for each endpoint at each site, the estimated time required for a given amount of abandoned cropland in a cohort to be recultivated (deciles, 10% through 100%).</li> <li><strong>endpoint_half_lives – </strong>a .csv containing the half-lives calculated for the mean trajectories for each endpoint at each site.</li> </ul> </li> <li><strong>decay_mod_archive</strong> - an R data file (.rds) containing eleven data products derived from linear models of abandonment recultivation ("decay"): <ul> <li><strong>lm_mega_lin_log_lin_l</strong> – the primary linear model produced in our analysis. This model is referred to as “lin_log_lin” (or “l3”) because the model predicts linear persistence (“lin”) as a function of a log term of time (“log”) and a linear term of time (“lin”). “mega” refers to the fact that this model is run for the full dataset, pooled across all 11 sites.</li> <li><strong>coef_l3_mega</strong> – a .csv containing model coefficients for our primary linear model of recultivation (“lin_log_lin”, or “l3”), with a single row each for the linear term of time and the log term of time, for 26 cohorts at 11 sites.</li> <li><strong>mean_coef_l3_mega</strong> – a data frame containing the mean coefficient values for the log and linear terms of time across cohorts at each site. This also contains the mean of the low and high coefficient estimates, based on the 95% confidence interval.</li> <li><strong>half_lives_all_cohorts_l3</strong> – half-lives calculated for each cohort at each site, for our primary model.</li> <li><strong>half_life_mean_coefs_l3</strong> – half-lives calculated based on the mean trajectory for each site (based on the mean log coefficients and mean linear coefficients across all cohorts), for our primary model.</li> <li><strong>mod_AIC_mega</strong> – Akaike Information Criterion (AIC) values for all tested model specifications.</li> <li><strong>fitted_combo</strong> – fitted values (i.e., model predictions) for our primary model (“l3”) and a series of alternative model specifications (“l3_trim” – excluding cohorts with fewer than 5 observations; “lin_log” – a model including only one log time term; “log2_lin” – in which the log of persistence is predicted by log and linear time terms; and “l3_no_cohort” – our primary model, predicting linear persistence as a function of log time and linear time, but without cohort-level fixed effects).</li> <li><strong>time_to_combo</strong> – contains the estimated time required for a certain amount of abandoned cropland in a cohort to be recultivated (deciles, 10% through 100%). See script "2_decay_models.Rmd." These values are calculated for a range of alternative model specifications ("l3_trim", “lin_log”, "log2_lin", and "l3_no_cohort"; see above).</li> </ul> </li> </ul> </li> <li><strong>Length data</strong> – includes “_distill_df” files and “mean_length_df” files for observed, potential, and recultivation. <ul> <li><strong>length_distill_df</strong> - .csvs containing the number ("freq") of abandonment periods of a specific "length" of time (i.e., age) at each site over the course of the entire time series. Derived from the "length" files in "length.zip." See script "cluster/5_distill_lengths.R."</li> <li><strong>mean_length_df</strong> - .csvs with the mean, median, and standard deviation, for each site, for both "all" lengths or just the "max" length per pixel, and for a range of abandonment definitions (1, 3, 5, 7, and 10 years). Derived from "length_distill_df." See script "1_summary_stats.Rmd."</li> </ul> </li> <li><strong>Duration summary files</strong> – includes “summary_stats_all_sites” and “summary_stats_all_sites_pooled,” for observed and potential abandonment, and recultivation periods following abandonment. <ul> <li><strong>“summary_stats_all_sites”</strong> - A simple .csv derived from "mean_length_df" files containing summary stats across the 11 sites. This includes the mean of the mean abandonment duration ("length", in years) for each of our 11 sites ("mean_of_means"), the standard deviation of these site mean abandonment lengths ("sd_of_means"), the mean of the standard deviation at each site ("mean_of_sds"), the mean median ("mean_of_medians"), and the mean number of abandonment periods ("mean_n_abn_periods"). Note that length "all" indicates that these stats account for all periods (including multiple per pixel), rather than just the max duration per pixel. See script "1_summary_stats.Rmd."</li> <li><strong>“summary_stats_all_sites_pooled”</strong> - A summary .csv similar to "summary_stats_all_sites," but calculated by pooling all distinct periods of abandonment across all eleven sites, and then calculating the mean, median, and standard deviation of abandonment duration. See script "1_summary_stats.Rmd."</li> </ul> </li> <li><strong>Comparing annual approach to identifying abandonment to a two-timepoint (“2yr”) approach:</strong> <ul> <li><strong>abn_2yr_ages_df</strong> - Contains the age of former croplands identified as "abandoned" using a two-timepoint method (i.e., 2017 - 1987), where age values (as of 2017) are derived from our map of abandonment identified using the full annual time series. This includes the area in hectares (ha), in each age class (along with the number of pixels), at each of our 11 sites. This dataset is used to calculate the percent of cropland "abandonment" identified using the two-year method that is actually too "young," i.e., less than 5 years old, and therefore not truly abandonment according to our five-year abandonment definition</li> <li><strong>abn_2yr_overestimation</strong> - Compares the area (in hectares) of cropland abandonment at each site identified with our full annual time series (and a five-year abandonment definition) and the "abandonment" identified using a two-timepoint method (2017-1987). This also includes the percent difference in area between the two methods, the Jaccard similarity of the areas identified as abandonment, and the percent of "young" (i.e., <5-year-old) "abandonment" identified by the two-timepoint method.</li> </ul> </li> </ul> <p><strong>Input land cover maps:</strong></p> <p>As noted, the file "input_rasters.zip" contain the raw annual land cover maps for eleven sites generated by:</p> <blockquote> <p>Yin, H., A. Brandão, J. Buchner, D. Helmers, B. G. Iuliano, N. E. Kimambo, K. E. Lewińska, E. Razenkova, A. Rizayeva, N. Rogova, S. A. Spawn, Y. Xie, and V. C. Radeloff. 2020. Monitoring cropland abandonment with Landsat time series. <em>Remote Sensing of Environment</em> 246:111873. https://doi.org/10.1016/j.rse.2020.111873</p> </blockquote> <p>These land cover maps served as raw inputs for this project and form the basis of the analysis.</p> <p>All land cover maps have a resolution of 30-m and exist for each year from 1987 through 2017. The exceptions are Nebraska / Wyoming (1986-2018) and Wisconsin (1987-2018); these additional years were excluded from our analysis of abandonment duration.</p> <p><strong>Land cover categories in these maps are coded as follows:</strong></p> <ol> <li>Non-vegetated area (e.g., water, urban, barren land)</li> <li>Woody vegetation (e.g., forests)</li> <li>Cropland</li> <li>Herbaceous vegetation (e.g., grassland)</li> </ol> <p><strong>Site file names correspond to the following geographic locations:</strong></p> <ul> <li>belarus = Vitebsk, Belarus / Smolensk, Russia</li> <li>bosnia_herzegovina = Bosnia & Herzegovina</li> <li>chongqing = Chongqing, China</li> <li>goias = Goiás, Brazil</li> <li>iraq = Iraq</li> <li>mato_grosso = Mato Grosso, Brazil</li> <li>nebraska = Nebraska / Wyoming, USA</li> <li>orenburg = Orenburg, Russia / Uralsk, Kazakhstan</li> <li>shaanxi = Shaanxi/Shanxi, China</li> <li>volgograd = Volgograd, Russia</li> <li>wisconsin = Wisconsin, USA</li> </ul> <p>This dataset is minimally altered from Yin et al. 2020. However, land cover codes were updated for five sites (Iraq, Nebraska/Wyoming, Orenburg/Uralsk, Volgograd, and Wisconsin) in order to maintain consistency in how land cover was coded across all sites. The original land cover codes (matching Yin et al. 2020) are described in the file "site_df.csv" and are as follows:</p> <ol> <li>Iraq: 1 Non-vegetated; 2 Cropland; 3 Woody; 4 Herbaceous</li> <li>Nebraska / Wyoming (USA): 1 Cropland; 2 Woody; 3 Non-vegetated; 4 Herbaceous</li> <li>Orenburg, Russia / Uralsk, Kazakhstan: 1 Non-vegetated; 2 Cropland; 3 Herbaceous; 4 Woody</li> <li>Volgograd (Russia): 1 Non-vegetated; 2 Cropland; 3 Herbaceous; 4 Woody</li> <li>Wisconsin (USA): 1 Cropland; 2 Herbaceous; 3 Woody; 4 Non-vegetated</li> </ol>
Soil respiration dataset from abandoned croplands across China
Soil respiration, a critical component of the global carbon cycle, is highly sensitive to warming. Agricultural soils, including abandoned croplands, are large sources of carbon dioxide (CO2) to the atmosphere. Here, we report the responses of soil respiration and its components to warming from abandoned croplands spanning a large range in latitude (22.3 to 46.6°N) and elevation (2 to 3734 m) across China from three-year (2019 to 2021) in situ warming experiments. This dataset is a collation of soil respiration, heterotrophic respiration, and autotrophic respiration and their temperature sensitivity along with information on microclimates (e.g., soil temperature), plant biomasses, and soil carbon components (e.g., SOC) and quality under climate warming.
Dataset - Identification of early abandonment in cropland through radar-based coherence data and application of a Random-Forest model
<p>This dataset accompanies the manuscript titled "Identification of early abandonment in cropland through radar-based coherence data and application of a Random-Forest model", submitted by co-authors to the journal Global Change Biology (GCB) Bioenergy.</p> <p>Wouter Meijninger<sup>1</sup>, Berien Elbersen<sup>1</sup>, Michiel van Eupen<sup>1</sup>, Stephan Mantel<sup>2</sup>, Pilar Ciria Ciria<sup>3</sup>, Andrea Parenti<sup>4</sup>, Marina Sanz Gallego<sup>3</sup> and Paloma Perez Ortiz<sup>3</sup>, Marco Acciai<sup>4</sup>,and Andrea Monti<sup>4</sup><br> Institutes: 1) Wageningen University & Research, 2) ISRIC, 3) CIEMAT, 4) Bologna University,</p> <p><strong>Abstract (Manuscript)</strong></p> <p>In the context of increased pressures on land for food and non-food production it is relevant to understand better, which land resources have become unused and abandoned and where these lands are. Data on where these lands are and what their extend is are not collected in regular statistics. In this paper we present an approach to detect signs of abandonment in cropping land using radar coherence data. The methodology was tested in the Spanish regions of Albacete and Soria where agricultural land abandonment is a common process. The results show that land abandonment detection using radar coherence data works well for the region of Albacete in arable lands. The radar-based analysis is a relatively simple method to detect land abandonment in an early to longer-term state and can therefore be applied once developed and tested further in other regions to larger areas of the EU where land abandonment is serious and needs monitoring and policy response. The applicability of the method to Soria and Emilia Romagna (Italy) regions show that there are still challenges to overcome to make the method more widely applicable for detecting land abandonment in other environmental zones of Europe. Lack of reliable training and validation data, like LPIS data, in regions is one of the challenges in this respect.</p> <p><strong>Readme data files</strong></p> <p><em>Coherence_quarterly_statisitcs_2017_to_2020.zip</em></p> <p>Radar coherence quarterly statistics - Albacete (Spain)</p> <p>Radar coherence data is based on Sentinel-1B<br> Period: 2017 to 2020</p> <p>File naming (.tif files) per year (<em>YYYY</em>):</p> <ul> <li>Mean coherence: <em>mean_YYYY_1to4.tif</em></li> <li>Standard deviation coherence: <em>std_YYYY_1to4.tif</em></li> <li>Range coherence: <em>range_YYYY_1to4.tif</em></li> <li>Mean delta coherence: <em>mean_delta_YYYY_1to4.tif</em></li> <li>Standard deviation delta coherence: <em>std_delta_YYYY_1to4.tif</em></li> <li>Maximum delta coherence: <em>max_delta_YYYY_1to4.tif</em></li> </ul> <p>Each file consists of 4 bands:</p> <ul> <li>band 1: 1st quarter [Jan-Feb-March]</li> <li>band 2: 2nd quarter [April-May-June]</li> <li>band 3: 3rd quarter [July-Aug-Sept]</li> <li>band 4: 4th quarter [Oct-Nov-Dec]</li> </ul> <p>Statistics are based on radar coherence data, which is scaled between >0 and 1<br> No data: 0-values</p> <p>Projection:<br> EPSG:32630 - WGS 84 / UTM zone 30N<br> Pixel size: 20m</p> <p><em>SIGPAC_data_Albacete_2018_to_2020.zip</em></p> <ul> <li>More than 5 year fallow (20m raster files)</li> <li>Land Use Land Cover LULC (20m raster files)</li> </ul> <p>More than 5 year fallow (according to SIGPAC)<br> Period: 2018 to 2020<br> File naming (ENVI files):</p> <ul> <li>Albacete_SIGPAC_MoreThan5YrsFallowAreas_2018_20m.dat (+ Albacete_SIGPAC_MoreThan5YrsFallowAreas_2018_20m.hdr)</li> <li>Albacete_SIGPAC_MoreThan5YrsFallowAreas_2019_20m.dat (+ Albacete_SIGPAC_MoreThan5YrsFallowAreas_2019_20m.hdr)</li> <li>Albacete_SIGPAC_MoreThan5YrsFallowAreas_2020_20m.dat (+ Albacete_SIGPAC_MoreThan5YrsFallowAreas_2020_20m.hdr)</li> </ul> <p>Pixel values:<br> 0: Not fallow<br> 1: Fallow more than 5 years</p> <p>Projection:<br> EPSG:32630 - WGS 84 / UTM zone 30N<br> Pixel size: 20m</p> <p>Land Use Land Cover LULC (according to SIGPAC)<br> Period: 2018 to 2020<br> File naming (ENVI files):</p> <ul> <li>LULC_SIGPAC_Albacete_2018_20m.dat (+ LULC_SIGPAC_Albacete_2018_20m.hdr)</li> <li>LULC_SIGPAC_Albacete_2019_20m.dat (+ LULC_SIGPAC_Albacete_2019_20m.hdr)</li> <li>LULC_SIGPAC_Albacete_2020_20m.dat (+ LULC_SIGPAC_Albacete_2020_20m.hdr)</li> </ul> <p>Pixel values:</p> <ul> <li>0 - Nan</li> <li>1 - Arable land</li> <li>2 - Vineyards</li> <li>3 - Olives</li> <li>4 - Fruits</li> <li>5 - Nuts</li> <li>6 - Citrus</li> <li>7 - Permanent grassland</li> <li>8 - Forest</li> <li>9 - Rest, small elements</li> <li>10 - Built-up areas</li> <li>11 - Water</li> <li>12 - Roads</li> <li>13 - Unproductive land</li> </ul> <p>Projection:<br> EPSG:32630 - WGS 84 / UTM zone 30N<br> Pixel size: 20m</p> <p><em>Annual_unused_used_land_maps_Albacete_2017_to_2020.zip</em></p> <p>Derived annual unused/used land maps - Albacete (Spain), based on Random-Forest model<br> Period: 2017-2020<br> File naming (ENVI files):</p> <ul> <li>predict_RF_Albacete_2017_quarterly_stats_LU1_v181920.dat (+ predict_RF_Albacete_2017_quarterly_stats_LU1_v181920.hdr)</li> <li>predict_RF_Albacete_2018_quarterly_stats_LU1_v181920.dat (+ predict_RF_Albacete_2018_quarterly_stats_LU1_v181920.hdr)</li> <li>predict_RF_Albacete_2019_quarterly_stats_LU1_v181920.dat (+ predict_RF_Albacete_2019_quarterly_stats_LU1_v181920.hdr)</li> <li>predict_RF_Albacete_2020_quarterly_stats_LU1_v181920.dat (+ predict_RF_Albacete_2020_quarterly_stats_LU1_v181920.hdr)</li> </ul> <p>Pixel values:<br> 0 - Used (and/or Nan)<br> 1 - Unused</p> <p>Projection:<br> EPSG:32630 - WGS 84 / UTM zone 30N<br> Pixel size: 20m</p> <p><em>Four_year_abandoned_land_Albacete_2017_to_2020.zip</em></p> <p>Four-year abandonment map is based on the 4 annual unused/used land maps<br> File naming (ENVI):</p> <ul> <li>Four_year_abandoned_land_Albacete_2017_to_2020.dat (+ Four_year_abandoned_land_Albacete_2017_to_2020.hdr)</li> </ul> <p>Pixel values:<br> 0 - (Nan)<br> 1 - Used (1 year unused in period 2017 - 2020)<br> 2 - Used (2 year unused in a row in period 2017 - 2020)<br> 3 - Abandoned (3 year unused in a row in period 2017 - 2020)<br> 4 - Abandoned (4 year unused in a row in period 2017 - 2020)</p> <p>Projection:<br> EPSG:32630 - WGS 84 / UTM zone 30N<br> Pixel size: 20m</p>
Figure 1 in Morphometry And Eye Morphology Of Harpalus (Proteonus) Distinguendus (Duftschmid, 1812) And H. (Amblystus) Rufipalpis (Sturm, 1818) (Coleoptera: Carabidae), Two Congeners Inhabiting Abandoned Croplands
Figure 1. Measured traits of Harpalus distinguendus female and male individuals. Trait units in table 1.
Data for "The neglected role of abandoned cropland in supporting both food security and climate change mitigation"
<p><strong>Data for "The neglected role of abandoned cropland in supporting both food security and climate change mitigation"</strong></p> <p><strong>All files will be made publicly accessible before publication.</strong></p> <p>Version: 2.0 (Round 2 revision)</p> <p>Content (spatial resolution, data info)</p> <ol> <li>Abandoned cropland map (10arcsec, 1 raster file)</li> <li>Suitabability of abanonded cropland for reforestation and recultivation (5arcmin, 3 raster files)</li> <li>Food production potential of global abandoned cropland (5arcmin,1 raster file)</li> <li>Climate change mitigation potential of global abandoned cropland (5arcmin, 1 raster file)</li> <li>outcomes of key scenarios <ul> <li>4 key Scenarios: Maximizing food production, Maximizing climate change mitigation, Equal Allocation, Maximizing combined potential</li> <li>Data included in the output of each scenario: <ul> <li>Land allocated for reforestation and recultivation (5arcmin/1arcdeg, 5 raster files)</li> <li>Climate change mitigation potential and food production potential (5arcmin/1arcdeg, 5 raster files)</li> <li>Emission for land clearing (5arcmin, 1 raster)</li> <li>Foregone climate change mitigation potential (5arcmin, 1 raster)</li> <li>Summary table</li> </ul> </li> <li>Summary table for 4 key scenarios</li> </ul> </li> <li>Codes for generating 4 key scenarios</li> </ol>
Figure 2 in Morphometry And Eye Morphology Of Harpalus (Proteonus) Distinguendus (Duftschmid, 1812) And H. (Amblystus) Rufipalpis (Sturm, 1818) (Coleoptera: Carabidae), Two Congeners Inhabiting Abandoned Croplands
Figure 2. Measured traits of Harpalus rufipalpis female and male individuals. Trait units in
Projections of Future Cropland Abandonment: Impacts to Biodiversity and Carbon Sequestration
Open the record for dataset details and reuse information.
Data from: Changes in levels of enzymes and osmotic adjustment compounds in key species and their relevance to vegetation succession in abandoned croplands of a semiarid sandy region
<p>Reclamation of cropland from grassland is regarded as a main reason for grassland degradation; understanding succession from abandoned cropland to grassland is thus crucial for vegetation restoration in arid and semiarid areas. Soil becomes dry when cropland is reverted to grassland, and enzyme and osmotic adjustment compounds may help plants to adapt to a drying environment. Croplands that were abandoned in various years on the Ordos Plateau in China, were selected for the analysis of the dynamics of enzymes and osmotic adjustment compounds in plant species during vegetation succession. With increasing number of years since abandonment, levels of superoxide dismutase<span> increased</span><span> in </span><i><span><span>Stipa</span></span></i><i><span><span> bungeana</span></span></i><span>, first decreased </span><span>and then increased in </span><i><span><span>Lespedeza</span></span></i><i><span><span> davurica</span></span></i><span> and </span><i><span><span>Artemisia f</span></span></i><i><span><span>rigida</span></span></i><span>, and fluctuated in </span><i><span><span>Heteropappus altaicus</span></span></i><span>. Levels</span> of<span> peroxidase and catalase in the four species fluctuated</span><span>;</span> levels of<span> proline, soluble sugar and soluble protein either</span><i> </i><span>decreas</span><span>ed</span><span> or</span><span> first </span><span>increase</span><span>d</span><span> and</span><span> then</span><span> generally decreased.</span> According to <span>a </span><span>drought resistance</span><span> index</span>, the <span>drought resistance of the </span><span>four </span><span>species</span><span> was </span><span>ranked in descending order as follows</span>: <i><span>S. bungeana </span></i><span>> </span><i><span>A. frigida </span></i><span>> </span><i><span>H. altaicus</span></i> <span>> </span><i><span>L. davurica</span></i>. The drought resistance ability of the different species was<span> closely linked with vegetation succession from communities dominated by annual and biennial species (with main accompanying species of </span><i><span><span>L.</span></span></i><i><span><span> davurica</span></span></i> <span>and</span><i><span><span> H. altaicus</span></span></i><span>) to communities dominated by perennial species (</span><i><span><span>S.</span></span></i><i><span><span> bungeana</span></span></i><span> and </span><i><span><span>A. f</span></span></i><i><span><span>rigida</span></span></i><span>) when soil became dry owing to increasing evapotranspiration after cropland abandonment. </span>The restoration of <i><span>S. bungeana </span></i>steppe after cropland abandonment on the Ordos Plateau<span> is recommended both as high-quality forage and for environmental sustainability</span>.</p>
Data from: Changes in levels of enzymes and osmotic adjustment compounds in key species and their relevance to vegetation succession in abandoned croplands of a semiarid sandy region
Open the record for dataset details and reuse information.
Large opportunities to expand winter wheat production on abandoned croplands for climate adaptation
<p>These are source datasets used to generate the figures in the paper "<strong>Large opportunities to expand winter wheat production on abandoned croplands for climate adaptation</strong>"</p> <p>(1) Fig.1.xlsx: Data for Fig. 1.<br>(2) Fig.2.xlsx: Data for Fig. 2.<br>(3) Fig.3.xlsx: Data for Fig. 3.<br>(4) Fig.4.xlsx: Data for Fig. 4.</p> <p> </p> <p>For any questions, please contact Liyin He (lhe@carnegiescience.edu) or Lorenzo Rosa (lrosa@carnegiescience.edu).</p>
The supplement material of 'Could land abandonment with human intervention benefit cropland restoration? From the perspective of soil microbiota'
<p>Figure S1 The study area and experimental plots. Figure S2 The correlation analysis of soil properties in each year, based on Spearman’s Rank correlation analysis. Only significant Spearman’s coefficients are shown (p < 0.05). Figure S3 Mantel test between soil properties and microbial community structure. *, ** and *** are used to show statistical significance at the 0.05, 0.01, and 0.001 level, respectively. Figure S4 The results of linear discriminant analysis effect size (LEfSe) on bacterial and fungal communities. The cutoff of LDA score is 2. Figure S5 The relative importance ranks of edaphic and human factors on microbial communities, based on %IncMSE of random forests model.</p>
U.S. annual cultivated extent and maps of cropland expansion and cropland abandonment
<p>This repository will eventually contain the data layers of several connected products related to U.S. cropland extent and dynamics, including:</p> <p><br> A set of 30-m resolution maps of <strong>annual cultivated extent </strong>for the conterminous US (CONUS) for the years 1986-2018</p> <p>A 30-m resolution nationwide map of <strong>abandoned croplands </strong>in the U.S., as described by Xie et al. (in review).</p> <p>A 30-m resolution nationwide map of <strong>stable croplands</strong> in the U.S., as described by Uludere-Aragon et al. (in review).</p> <p>A 30-m resolution nationwide map of <strong>cropland expansion</strong> in the U.S. for the period 1986-2018 (in prep). </p> <p> </p> <p> </p> <p>These data were also utilized in related publications, including:</p> <p>Xie and Lark (2021). Mapping annual irrigation from Landsat imagery and environmental variables across the conterminous United States. https://doi.org/10.1016/j.rse.2021.112445</p> <p>Xie et al. (2021). Landsat-based Irrigation Dataset (LANID): 30 m resolution maps of irrigation distribution, frequency, and change for the US, 1997–2017. https://doi.org/10.5194/essd-13-5689-2021</p> <p>O'neil et al. (in prep) Effect of marginal land definitions on biofuel supply chain optimization outcomes.</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.