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Historical Land Use Database: Landuse at one square mile around the survey 200 plots 1990
Phase 2 landuse for LTER project. Landuse digitized from one mile square sections surrounding 200 Survey Sample points. This layer represents 1990 landuse for those sections.
Historical Land Use Database: Landuse at one square mile around the survey 200 plots 2000
Phase 2 landuse for LTER project. Landuse digitized from one mile square sections surrounding 200 Survey Sample points. This layer represents 2000 landuse for those sections.
Desert Fertilization Experiment: composition of annual plants in study plots within desert preserves in and around the greater Phoenix metropolitan area, spring 2008
Launched in 2006 with support from the National Science Foundation (NSF) and leveraged by the CAP LTER, the Carbon and Nitrogen deposition (CNdep) project sought to answer the fundamental question of whether elemental cycles in urban ecosystems are qualitatively different from those in non-urban ecosystems. Ecosystem scientists, atmospheric chemists, and biogeochemists tested the hypothesis that distinct biogeochemical pathways result from elevated inorganic nitrogen and organic carbon deposition from the atmosphere to the land. To test the hypothesis, scientists examined the responsiveness of Sonoran desert ecosystems to nutrient enrichment by capitalizing on a gradient of atmospheric deposition in and around the greater Phoenix metropolitan area. Fifteen desert study sites were established, with five locations each west and east of the urban core, and in the urban core in desert preserves. In addition to the gradient of atmospheric deposition in and around the urban core, select study plots at each of the fifteen desert locations receive amendments of nitrogen, phosphorus, or nitrogen + phosphorus fertilizer. Measured variables include soil properties, perennial and annual plant growth, and atmospheric deposition of nitrogen. At the close of the initial grant period, the CAP LTER assumed responsibility for the project, renamed the Desert Fertilization Experiment, which provides a remarkable platform to study the long-term effects of nutrient enrichment on ecosystem properties. This data set features the composition of annual plants in subplots at project study sites assessed in spring 2008. These data are published independently of surveys of annual plants in subsequent years owing to slightly differnet methods employed in 2008 relative to other years. Investigators interested in annual plants composition data from other years, or for other Desert Fertilization Experiment data, should search the data repository for 'desert fertilization experiment'.
Desert Fertilization Experiment: inventory and biovolume of perennial plants in study plots within desert preserves in and around the greater Phoenix metropolitan area, spring 2012
Launched in 2006 with support from the National Science Foundation (NSF) and leveraged by the CAP LTER, the Carbon and Nitrogen deposition (CNdep) project sought to answer the fundamental question of whether elemental cycles in urban ecosystems are qualitatively different from those in non-urban ecosystems. Ecosystem scientists, atmospheric chemists, and biogeochemists tested the hypothesis that distinct biogeochemical pathways result from elevated inorganic nitrogen and organic carbon deposition from the atmosphere to the land. To test the hypothesis, scientists examined the responsiveness of Sonoran desert ecosystems to nutrient enrichment by capitalizing on a gradient of atmospheric deposition in and around the greater Phoenix metropolitan area. Fifteen desert study sites were established, with five locations each west and east of the urban core, and in the urban core in desert preserves. In addition to the gradient of atmospheric deposition in and around the urban core, select study plots at each of the fifteen desert locations receive amendments of nitrogen, phosphorus, or nitrogen + phosphorus fertilizer. Measured variables include soil properties, perennial and annual plant growth, and atmospheric deposition of nitrogen. At the close of the initial grant period, the CAP LTER assumed responsibility for the project, renamed the Desert Fertilization Experiment, which provides a remarkable platform to study the long-term effects of nutrient enrichment on ecosystem properties. This data set features an inventory and estimates of biovolume of perennial plants in control and nitrogen-amended study plots at project study sites. This assessment was conducted in spring 2012 and has not been repeated. As such, this particular set of data is published independently of on-going measurements at the study locations. Investigators interested in other Desert Fertilization Experiment data should search the data repository for 'desert fertilization experiment'.
Desert Fertilization Experiment: soil pH in study plots within desert preserves in and around the greater Phoenix metropolitan area, 2010 and 2011
Launched in 2006 with support from the National Science Foundation (NSF) and leveraged by the CAP LTER, the Carbon and Nitrogen deposition (CNdep) project sought to answer the fundamental question of whether elemental cycles in urban ecosystems are qualitatively different from those in non-urban ecosystems. Ecosystem scientists, atmospheric chemists, and biogeochemists tested the hypothesis that distinct biogeochemical pathways result from elevated inorganic nitrogen and organic carbon deposition from the atmosphere to the land. To test the hypothesis, scientists examined the responsiveness of Sonoran desert ecosystems to nutrient enrichment by capitalizing on a gradient of atmospheric deposition in and around the greater Phoenix metropolitan area. Fifteen desert study sites were established, with five locations each west and east of the urban core, and in the urban core in desert preserves. In addition to the gradient of atmospheric deposition in and around the urban core, select study plots at each of the fifteen desert locations receive amendments of nitrogen, phosphorus, or nitrogen + phosphorus fertilizer. Measured variables include soil properties, perennial and annual plant growth, and atmospheric deposition of nitrogen. At the close of the initial grant period, the CAP LTER assumed responsibility for the project, renamed the Desert Fertilization Experiment, which provides a remarkable platform to study the long-term effects of nutrient enrichment on ecosystem properties. This data set features soil pH collected in study plots at project study sites during 2010 and 2011. These data include a snapshot from two years of the long-term experiment. As such, this particular set of data is published independently of on-going measurements at the study locations. Investigators interested in other Desert Fertilization Experiment data should search the data repository for 'desert fertilization experiment'.
Main Plots All Arthropod Insect Sweepnet Sampling 1996-200: Biodiversity II: Effects of Plant Biodiversity on Population and Ecosystem Processes
Biodiversity II (E120) is designed to determine how the number of plant species affects the dynamics of ecological processes at the population, community, and ecosystem levels. By experimentally manipulating the number of species and the kinds of species, the amount of plant growth and the change from year to year, that result can be examined. Plots are large (9m x 9m actively maintained) and well-replicated, allowing responses of plant pathogens, insect herbivores, seed predators, soil parameters, invasive plant species and other variables to also be studied. Plots were seeded in May 1994 to have 1, 2, 4, 8, or 16 species, with roughly 30 replicates of each diversity level. The species composition of each plot was chosen by random draw from a pool of 18 grassland perennials that included four warm-season (C4) grasses, four cool-season (C3) grasses, four legumes, four non-legume forbs, and two woody species. All species occur in monoculture allowing comparison of responses of each species in monoculture to combinations of these same species. The experiment was established in 1994 by the lead investigators David Tilman, Peter Reich, Johannes Knops, and David Wedin. Experiment 120 is similar to Experiment 123, but it uses larger plots to provide a large capacity for long-term subexperiments.
Lysimeter - Water Treatment Plots:BioCON : Biodiversity, Elevated CO2, and N Enrichment
BioCON (Biodiversity, CO2, and Nitrogen) is an ecological experiment started in 1997 at the University of Minnesota's Cedar Creek Ecosystem Science Reserve. BioCON's goal is to explore the ways in which plant communities will respond to three environmental changes that are known to be occurring on a global scale: increasing nitrogen deposition, increasing atmospheric CO2, and decreasing biodiversity. Why Biodiversity, CO2, and Nitrogen? While there are many uncertainties in global change biology, there are also some well documented facts. Some of these are: 1. The amount of carbon dioxide (CO2) in the atmosphere is rising. Since the industrial revolution, the CO2 concentration in the atmosphere has increased from approximately 275 parts per million (ppm) to about 378 ppm today. This has been largely the result of fossil fuel burning. It is expected that CO2 levels will continue to rise, and that by the year 2050 these levels will be approximately 550 ppm. CO2 is the raw material for photosynthesis and is known to affect plant growth and development. 2. The amount of nitrogen moving through terrestrial ecosystems has increased in the recent past. While natural "background" levels of nitrogen fixation have remained constant, human additions to the system through fertilizer production and fossil fuel use have increased dramatically. Nitrogen is a key nutrient for plant growth and plays a critical role in plant community structure and composition in many environments. 3. Biodiversity levels are falling. While the research and data are not as complete as they are for CO2 and nitrogen, data indicate that the number of species globally, is being reduced. Perhaps more important for ecosystem function, diversity levels on local to regional scales have fallen due to land use change, biotic invasion and many other drivers. While much is known about how each of these factors affects ecosystem functioning, many questions remain. There is also little data on how these issues affe
Remeasurement of permanent hectare plots at Hocking College 1998 (Coweeta Hydrologic Laboratory) in 1998
Data was collected from six collectors. Statistical means were volume weighted.
Maximum soil depth measurements from the Terrestrial Gradient plots at the Coweeta Hydrologic Lab in Macon County, NC.
Maximum soil depths were assessed as part of the soil chemistry studies at the gradient plots at the Coweeta Hydrologic Laboratory in Macon County, North Carolina. There were 5 sites representing an elevational gradient and different forest types. A soil probe was used to estimate the maximum soil depth of each of the 80 x 80 -m plots at each site.
Stem temperature in watershed 27 ridge climate 77 station plot at the Coweeta Hydrologic Laboratory from 1996 to 1999
Tree stem temperature is currently being collected to determine both diurnal and seasonal variation in tree stem temperatures for all species and sizes present at the Coweeta Watershed 27 Ridge Climate 77 Station Plot. The purpose of the data is to characterize the tree stem temperature regimes as they relate to tree stem respiration. Data will continue to be collected until approximately December 1997. Data will then be subsequently summarized and published.
Variability in soil and litter arthropod populations in the Soil Freezing Study plots at the Hubbard Brook Experimental Forest, 2009-2010
Climate models for the northeastern United States (U.S.) over the next century project an increase in air temperature between 2.8 and 4.3 °C and a decrease in the average number of days per year when a snowpack will cover the forest floor. Warmer temperatures may benefit some litter arthropods by allowing them to expand their ranges and to increase their rates of reproduction. However, a reduction in snowpack depth and duration could offset these changes and lead to increased arthropod mortality because the snowpack plays an important role in insulating arthropods from freezing temperatures. We evaluated these potential changes by measuring arthropod abundance in the Soil Freezing Study plots at the Hubabard Brook Experimental Forest. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Moose activity and nitrogen cycling along an elevation gradient on the snow removal plots at the Hubbard Brook Experimental Forest.
The response of moose activity and three tree species to soil freezing were measured through experimental manipulation (shoveling) of snow to induce soil freezing. In addition, mechanical clipping of plants to simulate moose browsing and the addition of 15N labeled moose feces were included to determine the biogeochemical and plant response. N dynamics were evaluated using soil tension lysimeters, soil sampling, tracing movement of moose fecal N into soil, plant and microbial pools and leaching loss. Both total N and 15N were measured in all pools and fluxes. Fluxes include N mineralization and nitrification rates. Rate of decomposition and fate was also followed for moose feces. This data set includes measurents from 2003 to 2006. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Canopy size, gap size, plant height, and scaled height in NEAT plots at Jornada Basin LTER, Summer 2017
This data package contains estimates of vegetation indicators derived from UAV overflights and comparable field observatons at the NEAT experiment in the Jornada Basin of southern New Mexico, USA. The purpose of this study is to develop a UAV-based remote sensing method that can estimate vegetation indicators in arid and semiarid rangelands. This method was used to characterize six rangeland indicators (canopy size, bare soil gap size, plant height, scaled height, vegetation cover, and bare soil cover) in a semiarid grass-shrub ecosystem at the NEAT site. The drone-based estimates were validated with field measurements by using the standard transect methods (gap intercept, drop disk, and line-point intercept methods) in the spring and summer of 2017. Further, we use these results to show possible applications of drone-based products on arid and semiarid rangelands: the spatially explicit input of an ecological model, to detect and characterize non-stationarity, and to detect landscape anisotropy.
Federal sampler data for Black Sand experimental plots, 2018
This project is part of the Black Sand experiment to monitor effects of early snowmelt at Niwot Ridge. At each of five sites (Lefty, Soddie, Trough, East Knoll and Audubon) two 2x2 m plots were set up and two 3x3m plots were set up, with one of each size plot receiving 600 g/m2 black sand and one receiving 800 g/m2 of black sand. This portion of the black sand experiment was to look at snow depth and SWE using a federal sampler at each of the plots in 2018. We use an aluminum Standard Federal Snow Sampler to measure snow depth and snow water equivalent (SWE). This device, compared to traditional snow pit techniques, provides efficient measurement capabilities that are less disruptive to the snowpack. Manual Federal Sampler measurements provide high accuracy point data to determine the amount of water in the surrounding snowpack. With a high downstream reliance on water within the regional snowpack, our weekly measurements give a time series of SWE throughout the winter season, offering consistent and dependable information for water resource planning and preparation.
Pollinator visitation in Moving Uphill plots for 2019
Climate change impacts the interactions of many species, including those between plants and pollinators. Plant-pollinator interactions, crucial for the persistence of most plant and many insect species, are threatened by climate change-driven spatial shifts. Upward elevational shifts by plants can alter spatial overlap of plant and pollinator species. These spatial mismatches could decrease plant fecundity, influence pollinator nutrition, and impact the strength and resilience of pollinator networks, especially in less diverse systems such as the alpine. Past work at Niwot Ridge Research Station in the Colorado Rockies has examined differences in plant and microbe species across a large elevational gradient. Here, we strive to examine how elevation affects pollination. Initial findings indicate that plants experience higher visitation rates by insects at higher elevations. Analysis of the diversity of these insects is ongoing.
Saddle nodal plot soil analyses
During the summer of 1991, soil samples were collected from directly adjacent to the permanent plots on the Niwot Ridge Saddle. These permanent plots included 12 nodal plots that had been established in the early 1970s by Pat Webber and Diane Ebert-May. Results of analyses performed on soil samples collected at those plots during 1971 were reported in May (1973, 1976). The 1991 analyses were intended to repeat the earlier measures for comparative purposes. Soil cores (0-5 cm) were removed from the field using a 7.5-cm diameter corer.
US-Hungary Grassland Biodiversity (cross-site project): 4x4 m Sample Plot Data (1996-1997)
Plant cover estimates were collected from Bouteloua grasslands at 3 different LTER (SGS, SEV, JRN) sites in summer of 1996/1997. The purpose of the data collection was to compare species composition and diversity between LTER sites and sandy grassland sites in Hungary.
SGS-LTER CO2 Elevation Study: Weekly volumetric soil water content, from TDR probes, for Open Top Chamber plots on the Central Plains Experimental Range, Nunn, Colorado, USA 1997-2001
This data package was produced by researchers working on the Shortgrass Steppe Long Term Ecological Research (SGS-LTER) Project, administered at Colorado State University. Long-term datasets and background information (proposals, reports, photographs, etc.) on the SGS-LTER project are contained in a comprehensive project collection within the Digital Collections of Colorado (http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429). The data table and associated metadata document, which is generated in Ecological Metadata Language, may be available through other repositories serving the ecological research community and represent components of the larger SGS-LTER project collection. Additional information and referenced materials can be found: http://hdl.handle.net/10217/82454. Volumetric soil water content was measured in the 0-15 cm soil depth layer using TDR probes, nearly weekly, in ambient and elevated CO2 open-top-chambers, and unchambered plots. A consistent improvement in SWC was seen in the elevated CO2 plots, while ambient-chambered plots often had lowest SWC. This research was conducted at the Central Plains Experimental Range, near Nunn, CO; lat.40degrees 40 minutes N; long. 104 degrees 45 minutes W in the shortgrass steppe region of NE Colorado, USA and as a collaboration between SGS-LTER and USDA-ARS researchers.
Nutrient concentrations in fertilized and unfertilized dune plots on Hog Island at the Virginia Coast Reserve 1990-1991
Open the record for dataset details and reuse information.
1992-93 Parramore Island, VA Permanent Plot Baseline Data : Site Data
Open the record for dataset details and reuse information.
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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.