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8 results for “potential natural vegetation”

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zenodo40/100

Potential Natural Vegetation of Eastern Africa (Burundi, Ethiopia, Kenya, Malawi, Rwanda, Tanzania, Uganda and Zambia): raster and vector GIS files for each country

<p>The map of potential natural vegetation of eastern Africa (V4A) gives the distribution of potential natural vegetation in Ethiopia, Kenya, Tanzania, Uganda, Rwanda, Burundi, Malawi and Zambia.</p> <p>The map is based on national and local vegetation maps constructed from botanical field surveys - mainly carried out in the two decades after 1950 - in combination with input from national botanical experts. Potential natural vegetation (PNV) is defined as &ldquo;vegetation that would persist under the current conditions without human interventions&rdquo;. As such, it can be considered a baseline or null model to assess the vegetation that could be present in a landscape under the current climate and edaphic conditions and used as an input to model vegetation distribution under changing climate.</p> <p>Vegetation types are defined by their tree species composition, and the documentation of the maps thus includes the potential distribution for more than a thousand tree and shrub species, see the documentation (<a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fvegetationmap4africa.org%2Fspecies.html&amp;data=05%7C02%7Cjpbl%40ign.ku.dk%7Ca3280e568f104b9a26b308dc4e62f67b%7Ca3927f91cda14696af898c9f1ceffa91%7C0%7C0%7C638471434157657534%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=aeHdnF4n19CbTTznMdObr91vfZys%2FY1PrK1OxI%2BHif0%3D&amp;reserved=0">https://vegetationmap4africa.org/species.html</a>)</p> <p>The map distinguishes 48 vegetation types, divided in four main vegetation groups: 16 forest types, 15 woodland and wooded grassland types, 5 bushland and thicket types and 12 other types. The map is available in various formats. The online version (<a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fvegetationmap4africa.org%2Fvegetation_map.html&amp;data=05%7C02%7Cjpbl%40ign.ku.dk%7Ca3280e568f104b9a26b308dc4e62f67b%7Ca3927f91cda14696af898c9f1ceffa91%7C0%7C0%7C638471434157657534%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=VKVkjZ8lTKMyoU9luZLAYFDwY5sbwDrGXceVEQAeGIQ%3D&amp;reserved=0">https://vegetationmap4africa.org/vegetation_map.html</a>) and for PDF versions of the map, see the documentation (<a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fvegetationmap4africa.org%2Fdocumentation.html&amp;data=05%7C02%7Cjpbl%40ign.ku.dk%7Ca3280e568f104b9a26b308dc4e62f67b%7Ca3927f91cda14696af898c9f1ceffa91%7C0%7C0%7C638471434157657534%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=FIsoem3dYG4%2FIQFMPlM8B2Vf9Doqf2CS7p2fevpAwx0%3D&amp;reserved=0">https://vegetationmap4africa.org/documentation.html</a>). Version 2.0 of the potential natural vegetation map and the woody species selection tool was published in 2015 (<a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fvegetationmap4africa.org%2Fdocs%2Fversionhistory%2F&amp;data=05%7C02%7Cjpbl%40ign.ku.dk%7Ca3280e568f104b9a26b308dc4e62f67b%7Ca3927f91cda14696af898c9f1ceffa91%7C0%7C0%7C638471434157657534%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=J1aJt1D0dUhDd2fF9uEo8k1uu%2F7josYZCnQG%2FXWj5Ks%3D&amp;reserved=0">https://vegetationmap4africa.org/docs/versionhistory/</a>). The original data layers include country-specific vegetation types to maintain the maximum level of information available. This map might be most suitable when carrying out analysis at the national or sub-national level.</p> <p>When using V4A in your work, cite the publication: Lilles&oslash;, J-P.B., van Breugel, P., Kindt, R., Bingham, M., Demissew, S., Dudley, C., Friis, I., Gachathi, F., Kalema, J., Mbago, F., Minani, V., Moshi, H., Mulumba, J., Namaganda, M., Ndangalasi, H., Ruffo, C., Jamnadass, R. &amp; Graudal, L. 2011, Potential Natural Vegetation of Eastern Africa (Ethiopia, Kenya, Malawi, Rwanda, Tanzania, Uganda and Zambia). Volume 1: The Atlas. 61 ed. Forest &amp; Landscape, University of Copenhagen. 155 p. (Forest &amp; Landscape Working Papers; 61 - as well as this repository using the DOI &lt;<span><a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.5281%2Fzenodo.11125645&amp;data=05%7C02%7Cjpbl%40ign.ku.dk%7C82eb48688be64612c08108dc70c1b2e9%7Ca3927f91cda14696af898c9f1ceffa91%7C0%7C0%7C638509224465318531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=BtOVb3lPqZXp45K%2BWKUaLQEK3CTn0uMg8ysuQh5aVpo%3D&amp;reserved=0">https://doi.org/10.5281/zenodo.11125645</a></span>&gt;.</p> <p>The development of V4A was mainly funded by the Rockefeller Foundation and supported by University of Copenhagen</p> <p>If you want to use the potential natural vegetation map of eastern Africa for your analysis, you can download the spatial data layers in raster format as well as in vector format from this repository &lt;<span><a href="https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoi.org%2F10.5281%2Fzenodo.11125645&amp;data=05%7C02%7Cjpbl%40ign.ku.dk%7C82eb48688be64612c08108dc70c1b2e9%7Ca3927f91cda14696af898c9f1ceffa91%7C0%7C0%7C638509224465318531%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&amp;sdata=BtOVb3lPqZXp45K%2BWKUaLQEK3CTn0uMg8ysuQh5aVpo%3D&amp;reserved=0">https://doi.org/10.5281/zenodo.11125645</a></span>&gt;</p> <p>A simplified version of the map can be found on&nbsp;<u>Figshare &lt;https://doi.org/10.6084/m9.figshare.1306936.v1&gt;. </u>That version aggregates country specific vegetation types into regional types. This might be the better option when doing regional-level assessments.</p> <p>&nbsp;</p>

opencc-by-4.0May 2024View details →
zenodo36/100

Potential distribution of land cover classes (Potential Natural Vegetation) at 250 m spatial resolution

<p>Potential distribution of land cover classes (Potential Natural Vegetation) at 250 m spatial resolution based on a compilation of data sets (Biome6000k, Geo-Wiki, LandPKS, mangroves soil database, and from various literature sources; total of about 65,000 training points). We used a comparable thematic legend used to produce the Dynamic Land Cover 100m: Version 2. Copernicus Global Land Operations product (Buchhorn et al. 2019), which is based on the UN FAO Land Cover Classification System (LCCS), so that users can compare actual (https://lcviewer.vito.be/) vs potential (this data set) land cover. Two classes not available in the LCCS were added: &quot;subtropical/tropical mangrove vegetation&quot; and &quot;sub-polar or polar barren-lichen-moss, grassland&quot;. The map was created using relief and climate variables representing conditions the climate for the last 20+ years and predicted at 250 m globally using an Ensemble Machine Learning approach as implemented in the mlr package for R. Processing steps are described in detail <a href="https://github.com/Envirometrix/PNVmaps"><strong>here</strong></a>. Maps with &quot;_sd_&quot; contain estimated model errors per class. Antarctica is not included.</p> <p>Produced for the needs of the <a href="https://naturemap.earth/"><strong>NatureMap</strong></a> which is project run by the <strong>International Institute for Applied Systems Analysis</strong> (IIASA), the <strong>International Institute for Sustainability</strong> (IIS), the <strong>UN Environment Programme World Conservation Monitoring Centre</strong> (UNEP-WCMC), and the <strong>UN Sustainable Development Solutions Network</strong> (SDSN). NatureMap is funded by Norway&rsquo;s International Climate Initiative (NICFI).</p> <p>Maps will also be made available via: <a href="https://OpenLandMap.org">OpenLandMap.org</a>. These are initial predictions for testing purposes only. A publication explaining all processing steps is pending.</p> <p>If you discover a bug, artifact or inconsistency in the predictions, or if you have a question please use some of the following channels:</p> <ul> <li>Technical issues and questions about the code: <a href="https://github.com/Envirometrix/PNVmaps/issues">https://github.com/Envirometrix/PNVmaps/issues</a></li> </ul> <p>All files internally compressed using &quot;COMPRESS=DEFLATE&quot; creation option in GDAL. File naming convention:</p> <ul> <li>pnv = theme: potential natural vegetation,</li> <li>potential.landcover = variable: potential land cover type (e.g. &quot;open forest, evergreen needleleaf&quot;),</li> <li>probav.lc100 = classification model: ProbaV-based land cover mapping legend (LCCS),</li> <li>c = factor,</li> <li>250m = spatial resolution / block support: 250 m,</li> <li>b0..0cm = vertical reference: land surface,</li> <li>2000..2017 = time reference: period 2000-2017,</li> <li>v0.1 = version number: 0.1,</li> </ul>

opencc-by-sa-4.0Jan 2020View details →
zenodo36/100

LPJmL4 Potential Natural Vegetation (PNV) simulations for use in MAgPIE for ISIMIP3 scenarios

<p>This data set contains output data from simulations with the model LPJmL version 4 for further use in the MAgPIE model. Simulations are based on the ISIMIP3a/b climate input data. No land use is considered here, simulations are for potential natural vegetation. Geospatial information in files&nbsp;<code>grid.clm</code>, data processing is recommended using <a href="https://github.com/PIK-LPJmL/lpjmlkit" target="_blank" rel="noopener">lpjmlkit</a>.</p>

opencc-by-4.0May 2024View details →
zenodo36/100

Model simulated potential natural vegetation state in the western US under preindustrial, historic, and future (RCP8.5) atmospheric conditions using multiple parameterizations of the dynamic vegetation model TRIFFID.

<p>DATA DESCRIPTION<br> Author contact information:<br> Linnia R. Hawkins<br> Oregon State University<br> lhawkins@oregonstate.edu; linnia.hawkins@gmail.com<br> Data supporting 2019 Journal of Advances in Modeling Earth Systems publication</p> <p>Simulations of the equilibrium vegetation distribution in the western US performed with the climate model HadAM3p-HadRM3p-MOSES2-TRIFFID</p> <p>step1: Identify Influential Parameters<br> All files labeled step1.<br> EXPERIMENT DESCRIPTION: Data used in step 1: identify influential parameters&nbsp;&nbsp; &nbsp;<br> sensitivity experiment adjusting one parameter at a time 38 individual parameters were adjusted to 7 values, equally spaced<br> over a defined plausible range. For reference nine simulations with the default model parameterization are included, initiated with unique initial potential temperature perturbations.&nbsp;</p> <p>The data contains the vegetation state variables at the end of four-year simulations (January 2004 to December 2007) during which two equilibrium time steps with the dynamic vegetation model TRIFFID (Cox et al., 2001). The results are averaged over three simulations initiated with unique atmospheric potential temperature perturbations.</p> <p>FILE DESCRIPTION:<br> NETCDF: Each netcdf file contains the fractional coverage (field1391), leaf area index (field1392), and the canopy height (field1393) for 5 plant functional types (PFTs: broadleaf, needleleaf, c3 grass, c4 grass, shrub) simulated for November 29, 2007.&nbsp;</p> <p>&nbsp;&nbsp; &nbsp;File labeling scheme: &nbsp;&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;step1_parameter_settingindex_3ICave.nc</p> <p>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;parameter: the name of the only model parameter adjusted<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;setting index: the index of the parameter setting (1-7)<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;index of 1 references the lowest plausible parameter setting<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;index of 7 references the highest plausible parameter setting<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;index of 4 references the parameter setting half way between the lowest and highest plausible parameter settings.&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;3ICave: references that the results have been averaged over 3 initial conditions.</p> <p>&nbsp;&nbsp; &nbsp;Variables:<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393 &ndash; canopy height of PFT &ndash; units: meters &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;</p> <p>step2: ParameterSensitivity<br> all files labeled step2<br> EXPERIMENT DESCRIPTION:<br> Data used in step 2: parameter sensitivity&nbsp;<br> Perturbed Parameter Experiment (PPE) simultaneously adjusting 18 parameters.<br> Latin hypercube sampling was employed to generate 250 unique parameterizations references with a SETID (ranging from 1-359)<br> The data provided contains the simulated vegetation state after 4 year simulations (December1903-November1907) with two TRIFFID equilibrium rounds.&nbsp;<br> Data is averaged over 5 initial atmospheric conditions.</p> <p>FILE DESCRIPTION:<br> NETCDF: files contain either the fractional coverage (field1391) or the above ground biomass (field1512) for 5 plant functional types (PFTs) simulated for November 1907.</p> <p>&nbsp;&nbsp; &nbsp;File labeling scheme: &nbsp;&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;step2_variable_parametersetindex_5ICave.nc</p> <p>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;variable: the name of the variable contained in the file<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;setting index: the index of the parameter setting corresponding to the parameter set text files<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;5ICave: references that the results have been averaged over 5 initial atmospheric conditions.</p> <p>&nbsp;&nbsp; &nbsp;Variables:<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1512 &ndash; above ground biomass of PFT &ndash; units: kgC/m2 &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]</p> <p>TXT: files contain a list of the model parameterizations (for each PFT and variable) and the corresponding to the parameter set index.&nbsp;<br> &nbsp;&nbsp; &nbsp;Parameters are labeled in row 1<br> &nbsp;&nbsp; &nbsp;Parameter set indices are shown in column 1</p> <p>RESTART: restart_region_TPPE_c374_1903-12-01.nc<br> &nbsp;&nbsp; &nbsp;The restart file contains the model state variables after spinup. This file was used to initiate all model simulations in step2.</p> <p>step3: ParameterSetSelection<br> All files labeled step3<br> EXPERIMENT DESCRIPTION:<br> Data used in step 3: parameter set selection<br> PPE simultaneously adjusting 10 parameters.&nbsp;<br> Latin hypercube sampling was employed to generate 140 unique model parameterizations, referenced with a SETID (ranging from 3-276).<br> The data provided contains the simulated vegetation state after 4 year simulations (December1903-November1907) with two TRIFFID equilibrium rounds.&nbsp;<br> Data is averaged over 5 initial atmospheric conditions.</p> <p><br> FILE DESCRIPTION:<br> NETCDF: files contain either the biomass (field1512) fractional coverage (field1391) canopy height (field1393) for 5 plant functional types (PFTs) simulated for November 1907 or the net primary productivity (NPP; item3262_monthly_mean) for December 1903 through November 1907.&nbsp;</p> <p>&nbsp;&nbsp; &nbsp;File labeling scheme: &nbsp;&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;step3_variable_parametersetindex_5ICave.nc</p> <p>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;variable: the name of the variable(s) contained in the file<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;setting index: the index of the parameter setting corresponding to the parameter set text files<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;5ICave: references that the results have been averaged over 5 initial atmospheric conditions.</p> <p>&nbsp;&nbsp; &nbsp;Variables:<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1512 &ndash; above ground biomass of PFT &ndash; units: kgC/m2 &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393 &ndash; canopy height of PFT &ndash; units: meters &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;item3262_monthly_mean &ndash; Net primary productivity &ndash; units: (kgC/m2/sec) &ndash; all PFTs</p> <p>TXT: files contain a list of the model parameterizations (for each PFT) and the corresponding to the parameter set index.&nbsp;<br> &nbsp;&nbsp; &nbsp;Parameters are labeled in row 1<br> &nbsp;&nbsp; &nbsp;Parameter set indices are shown in column 1</p> <p><br> production_runs<br> files labeled PI, historical, and future<br> EXPERIMENT DESCRIPTION:<br> Data simulated in the production runs. Model spinup was performed under preindustrial conditions with 10 unique model parameterizations (pset0-pset9). The resulting vegetation distribution for each parameterization after spinup are included and labeled PIrestarts. These restarts were used to initiate (or restart) the simulations under historic and future (RCP8.5) climate conditions. Files labeled historic contains the simulated vegetation state after 5 year simulations (2004-09-01 to 2009-08-30) with one TRIFFID equilibrium round occurring at the end. Files labeled future contain the simulated vegetation state after 5 year simulations (2054-09-01 to 2059-08-30) with one TRIFFID equilibrium round occurring at the end.&nbsp;</p> <p>FILE DESCRIPTION:<br> NETCDF: files contain the fractional coverage (field1391), leaf area index (field1392), canopy height (field1393), and biomass(field1512) for 5 plant functional types (in the order broadleaf, needleleaf, C3 grass, C4 grass, shrub).</p> <p><br> &nbsp;&nbsp; &nbsp;File labeling scheme:<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;pset* where * refers to the model parameterization 0-9<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;files were simulated with the model parameterization *, initiated with a unique initial condition (perturbation to the potential temperature field).&nbsp;</p> <p>&nbsp;&nbsp; &nbsp;Variables (PIrestart)<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [broadleaf]&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391_1 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [needleleaf]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391_2 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [c3grass]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391_3 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [c4grass]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391_4 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [broadleaf]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392_1 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [needleleaf]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392_2 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [c3grass]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392_3 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [c4grass]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392_4 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393 &ndash; canopy height of PFT &ndash; units: meters &ndash; [broadleaf]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393_1 &ndash; canopy height of PFT &ndash; units: meters &ndash; [needleleaf]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393_2 &ndash; canopy height of PFT &ndash; units: meters &ndash; [c3grass]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393_3 &ndash; canopy height of PFT &ndash; units: meters &ndash; [c4grass]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393_4 &ndash; canopy height of PFT &ndash; units: meters &ndash; [shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;</p> <p>&nbsp;&nbsp; &nbsp;Variables (historic/future)<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1391 &ndash; fractional coverage of PFT &ndash; units: fraction &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]&nbsp;<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1392 &ndash; leaf area index of PFT &ndash; units: m2/m2 &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1393 &ndash; canopy height of PFT &ndash; units: meters &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;field1512 &ndash; above ground biomass of PFT &ndash; units: kgC/m2 &ndash; [broadleaf; needleleaf; c3grass; c4grass; shrub]<br> &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp;<br> &nbsp; &nbsp; &nbsp; &nbsp;</p>

opencc-by-4.0Jul 2019View details →
dryad28/100

Adjacent crop type impacts potential pollinator communities and their pollination services in remnants of natural vegetation.

<p><em><span>Aim:</span></em><span> Pollination plays a crucial role in the conservation of many plant species persisting in fragmented, human-dominated landscapes. Pollinators are known to be instrumental in maintaining genetic diversity and metapopulation dynamics for many plant species and are important for providing ecological services that are essential in agricultural landscapes where populations of native plants are highly isolated. Numerous studies have explored the value of remnant native vegetation for supporting pollination services to crop species; yet the effect of mass-flowering crops on the pollinator communities and the pollination services they provide to native plant communities persisting in fragmented landscapes are less well-understood. Here, we</span><span> assess the influence of the presence and phenology of a mass-flowering crop to pollinator community structure, abundance and pollen load composition in remnant vegetation in complex agricultural landscapes. </span></p> <p><em><span>Location:</span></em><span> South-west Western Australia, Australia.</span></p> <p><em><span>Methods:</span></em><span> </span>We recorded the composition and abundance of insect flower visitors and their pollen loads in isolated remnants of York gum-Jam woodlands adjacent to canola (insect-attracting) or wheat (non-insect-attracting) fields over two years. </p> <p><em>Results:</em> All bees were much more sensitive to adjacent crop type (neighbouring canola or wheat) than non-bee pollinators. Honeybees were the most abundant pollinators in canola fields during peak flowering. Honeybee abundance increased in canola-adjacent reserves post-canola bloom, potentially indicating a movement into reserves as crop flowering waned. Native bees were the most diverse in remnant vegetation.  Pollen loads of native bees were more mixed (increased pollen richness and evenness) when sampled next to canola fields compared to wheat fields. </p> <p><em>Main conclusion:</em> The availability of potential insect pollinators to remnant wildflower communities in agricultural landscapes is context dependent. Whether sampled communities were adjacent to wheat or canola in a landscape significantly impacted the abundance of potential pollinators in certain landscape elements, but not others, and the composition of pollen loads carried by these insects. Results offer novel insights about the influence of landscape context on <span>pollinator communities and the potential pollination services available for the conservation of native plant species in highly fragmented agricultural landscapes.</span></p>

opencc-zeroApr 2022View details →
dryad28/100

Adjacent crop type impacts potential pollinator communities and their pollination services in remnants of natural vegetation.

Open the record for dataset details and reuse information.

publicApr 2022View details →
nasa28/100

ISLSCP II Potential Natural Vegetation Cover

This data set was developed to describe the state of the global land cover in terms of 15 major vegetation types, plus water, before alteration by humans. It forms a complement to the historical croplands data set developed by Ramankutty and Foley (1999). By overlaying the two, one can determine the extent to which natural vegetation has been cleared for cultivation. This data set can be used directly within spatially-explicit climate and biogeochemical models. There are four total files in this data set. Two files contain the land cover types representing potential natural vegetation before human alteration, and two other files contain those points in the original data set submitted by the Principal Investigator that have been modified in order to match the land/water mask of the ISLSCP Initiative II.The geographic distribution of contemporary land cover types can be derived from remotely-sensed data. However, humans now dominate much of the world and there is little evidence of the pre-human-settlement natural vegetation or Potential Natural Vegetation (PNV). PNV, as defined here, does not necessarily represent the world'??s natural pre-human-disturbance vegetation. Rather, our definition of PNV represents the world's vegetation cover that would most likely exist now in equilibrium with present-day climate and natural disturbance, in the absence of human activities.

restrictednotspecifiedApr 2025View details →
nasa28/100

VEMAP 1: U.S. Potential Natural Vegetation

The Vegetation/Ecosystem Modeling and Analysis Project (VEMAP) is an ongoing multiinstitutional, international effort addressing the response of biogeography and biogeochemistry to environmental variability in climate and other drivers in both space and time domains. The objectives of VEMAP are the intercomparison of biogeochemistry models and vegetationtype distribution models (biogeography models) and determination of their sensitivity to changing climate, elevated atmospheric carbon dioxide concentrations, and other sources of altered forcing. The vegetation data set includes one variable: vegetation type. Vegetation types are defined physiognomically in terms of dominant lifeform and leaf characteristics (including leaf seasonal duration, shape, and size) and, in the case of grasslands, physiologically with respect to dominance of species with the C3 versus C4 photosynthetic pathway. The physiognomic classification criteria are based on our understanding of vegetation characteristics that influence biogeochemical dynamics (Running et al. 1994). The U.S. distribution of these types is based on a 0.5 degree latitude/longitude gridded map of Kuchler's (1964, 1975) potential natural vegetation provided by the TEM group (D. Kicklighter and A.D. McGuire, personal communication). Kuchler's map is based on current vegetation and historical information and, for purposes of VEMAP Phase I model experiments, is presumed to represent potential vegetation under current climate and atmospheric CO2 concentrations (355 ppm). A complete users guide to the VEMAP Phase I database which includes more information about this data set can be found at ftp://daac.ornl.gov/data/vemap-1/comp/Phase_1_User_Guide.pdf. ORNL DAAC maintains additional information associated with the VEMAP Project. Data Citation: This data set should be cited as follows: Kittel, T. G. F., N. A. Rosenbloom, T. H. Painter, D. S. Schimel, H. H. Fisher, A. Grimsdell, VEMAP Participants, C. Daly, and E. R. Hunt, Jr. 1998. VEMAP Phase I Database, revised. Available on-line from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

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