AndreaBozzo/ceres-open-data-index huggingface dataset:
SGS-LTER Ecosystem Stress Area - Soil Carbon & Nitrogen in shortgrass steppe on the Central Plains Experimental Range in Nunn, Colorado, USA 1991, ARS Study Number 3

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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.
Water, nitrogen, and water-plus-nitrogen at levels beyond the range normally experience by shortgrass steppe communities were applied from 1971 through 1975, plant densities were sampled through 1977, and then sampling resumed in 1982, with sampling frequencies changing from annually to every other year. The initial sampling from 1970 to 1974 showed that the water and water plus nitrogen treatments had the strongest effect on plant community structure, both treatments increased biomass, and exotic weed species were noted on the water plus nitrogen treatment. Later sampling from 1982 to 1991 showed a ten-fold increase in exotic weed species on the water plus nitrogen plots as compared to the controls (Milchunas and Lauenroth 1995), a community change that has persisted on this site due to a chronic elevation of soil nitrogen caused by a plant tissue/soil organic matter feedback mechanism (Vinton and Burke 1995). In 1998, Six new treatments were superimposed on the historic study site. The six new treatments were: control, sugar, lignin, sawdust, lignin and sugar, and sawdust and sugar.In 2010, plots will be sampled every 5 years. Our objective in this study is to examine how plant communities change through time and explore implications of these changes for monitoring potentially stressed ecosystems. Additional information and referenced materials can be found: <a href="http://hdl.handle.net/10217/83317">http://hdl.handle.net/10217/83317</a>. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=181">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=181</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, biogeochemistry, carbon, data-gov, disturbance, inorganic-nutrients, nitrogen, np215, nsf-lterlong-term-ecological-research, organic-matter, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
SGS-LTER Ecosystem Stress Area - Soil Carbon & Nitrogen in shortgrass steppe on the Central Plains Experimental Range in Nunn, Colorado, USA 1991, ARS Study Number 3

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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.
Water, nitrogen, and water-plus-nitrogen at levels beyond the range normally experience by shortgrass steppe communities were applied from 1971 through 1975, plant densities were sampled through 1977, and then sampling resumed in 1982, with sampling frequencies changing from annually to every other year. The initial sampling from 1970 to 1974 showed that the water and water plus nitrogen treatments had the strongest effect on plant community structure, both treatments increased biomass, and exotic weed species were noted on the water plus nitrogen treatment. Later sampling from 1982 to 1991 showed a ten-fold increase in exotic weed species on the water plus nitrogen plots as compared to the controls (Milchunas and Lauenroth 1995), a community change that has persisted on this site due to a chronic elevation of soil nitrogen caused by a plant tissue/soil organic matter feedback mechanism (Vinton and Burke 1995). In 1998, Six new treatments were superimposed on the historic study site. The six new treatments were: control, sugar, lignin, sawdust, lignin and sugar, and sawdust and sugar.In 2010, plots will be sampled every 5 years. Our objective in this study is to examine how plant communities change through time and explore implications of these changes for monitoring potentially stressed ecosystems. Additional information and referenced materials can be found: <a href="http://hdl.handle.net/10217/83317">http://hdl.handle.net/10217/83317</a>. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=180">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=180</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, biogeochemistry, carbon, data-gov, disturbance, inorganic-nutrients, nitrogen, np215, nsf-lterlong-term-ecological-research, organic-matter, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
SGS-LTER Ecosystem Stress Area - Soil Carbon & Nitrogen in shortgrass steppe on the Central Plains Experimental Range in Nunn, Colorado, USA 1991, ARS Study Number 3

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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.
Water, nitrogen, and water-plus-nitrogen at levels beyond the range normally experience by shortgrass steppe communities were applied from 1971 through 1975, plant densities were sampled through 1977, and then sampling resumed in 1982, with sampling frequencies changing from annually to every other year. The initial sampling from 1970 to 1974 showed that the water and water plus nitrogen treatments had the strongest effect on plant community structure, both treatments increased biomass, and exotic weed species were noted on the water plus nitrogen treatment. Later sampling from 1982 to 1991 showed a ten-fold increase in exotic weed species on the water plus nitrogen plots as compared to the controls (Milchunas and Lauenroth 1995), a community change that has persisted on this site due to a chronic elevation of soil nitrogen caused by a plant tissue/soil organic matter feedback mechanism (Vinton and Burke 1995). In 1998, Six new treatments were superimposed on the historic study site. The six new treatments were: control, sugar, lignin, sawdust, lignin and sugar, and sawdust and sugar.In 2010, plots will be sampled every 5 years. Our objective in this study is to examine how plant communities change through time and explore implications of these changes for monitoring potentially stressed ecosystems. Additional information and referenced materials can be found: <a href="http://hdl.handle.net/10217/83317">http://hdl.handle.net/10217/83317</a>. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=179">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=179</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, biogeochemistry, carbon, data-gov, disturbance, inorganic-nutrients, nitrogen, np215, nsf-lterlong-term-ecological-research, organic-matter, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
SGS-LTER Standard Met Data: 1969-2010 Manually Collected Aboveground Meteorological Data: English Units on the Central Plains Experimental Range, Nunn, Colorado, USA, ARS Study Number 4

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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.
Datasets auto12_climdb and man11_climdb have been processed for quality and missing values. Additional information and referenced materials can be found: <a href="http://hdl.handle.net/10217/82446">http://hdl.handle.net/10217/82446</a>. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=174">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=174</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, climate, cloud-cover, data-gov, evaporation, inorganic-nutrients, meteorology, np215, nsf-lterlong-term-ecological-research, precipitation, radiation, temperature, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo, water, weather, wind
Organization: Department of Agriculture
SGS-LTER Paleopedology Study - soil particle size and grain size on the Central Plains Experimental Range, Nunn, Colorado, USA 1992- 1993

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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.
CPER Paleopedology Study – Particle and Grain Size - Grain size data from 39 pedons were compared with modal fluvial (7) and eolian (3) samples in order to characterize the origin of CPER parent materials and distinguish the origin of CPER geomorphic features. The seven fluvial sites were located along Owl and Eastman Creeks. The three eolian sites were located on the nearest undisputed dune fields located approximately 5 km north of Roggen, CO (Muhs, 1985). For statistical analysis, the sand and coarse silt fractions were shaken in a nest of half phi(0) interval sieves ranging from -1.0 0 (10 mesh) to 4.5 0 (325 mesh) for 3 minutes. Phi intervals (-log2) were utilized to normalize the particle size data for use in conventional statistics (Krumbein, 1934). The silt and clay fractions were separated by sedimentation using the pipette method. Statistical methods adopted from Folk and Ward (1957) were applied to the -1.0 0 to 7.0 0 fractions using the Sedimentary Petrology Computer Program SEDPET (Warner, 1970) to determine mean grain size (Mz), sorting (Iz), skewness (Skz), and kurtosis (Kz). These parameters were then subjected to univariate and bivariate analysis. The clay fraction was not included in the statistical computations to avoid excessively fine skewing the sample. Additional information and referenced materials can be found: <a href="http://hdl.handle.net/10217/85625">http://hdl.handle.net/10217/85625</a>. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=168">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=168</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, data-gov, inorganic-nutrients, np215, nsf-lterlong-term-ecological-research, organic-matter, paleoecology, paleopedology, soils, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
SGS-LTER Paleopedology Study - pedon descriptions on the Central Plains Experimental Range, Nunn, Colorado, USA 1992-1993

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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.
CPER Paleopedology Study – Pedons - Forty-one pedons representing sites of contrasting geomorphic position (upland plain, upland ridge, dissected upland, terrace, dune) were chosen for pedologic and geomorphic analyses. These pedons are located on the major physiographic units at the CPER, and contain deposits of suspected fluvial and eolian origin. To examine spatial variability, the pedons were typically sampled along transects spaced at 30m intervals. Samples were taken with a hydraulic soil probe to the depth of probe refusal and from suitable stream and road cuts. All soils were described and sampled by genetic horizon (Soil Survey Staff, 1992), and analyzed at Colorado State University. Analyses included particle size and organic C. Nineteen of the 41 pedons were subjected to stable isotopic analysis of organic C and carbonate. Additional information and referenced materials can be found: <a href="http://hdl.handle.net/10217/85625">http://hdl.handle.net/10217/85625</a>. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=167">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=167</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, data-gov, inorganic-nutrients, np215, nsf-lterlong-term-ecological-research, organic-matter, paleoecology, paleopedology, soils, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
SGS-LTER CO2 Elevation Study: Stipa comata basal size and plant density per Open Top Chamber plot on the Central Plains Experimental Range, Nunn, Colorado, USA 1997 - 2001

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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: <a href="http://hdl.handle.net/10217/82454">http://hdl.handle.net/10217/82454</a>.
At the end of the Open Top Chamber experiment the number and basal size of Stipa comata plants in ambient and elevated (720ppm) chambered and unchambered plots was measured. There was a greater number of small plants and seedlings in the elevated CO2 plots. 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. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=166">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=166</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, carbon-dioxide, community-dynamics, community-ecology, data-gov, disturbance, np215, nsf-lterlong-term-ecological-research, populations, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
SGS-LTER CO2 Elevation Study: Biomass, by species, from ambient and elevated CO2 OTC's and unchambered controls on the Central Plains Experimental Range, Nunn, Colorado, USA 1997 - 2001

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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: <a href="http://hdl.handle.net/10217/82454">http://hdl.handle.net/10217/82454</a>.
Above-ground plant material was harvested, by species, in July (PSC) in five years from ambient and elevated CO2 Open-top-chambers, and unchambered controls. There was a small difference in species composition, in the plots, in 1996; prior to any CO2 treatment; this data should be used as a covariate in looking at subsequent years. There was a consistent increase in plant productivity in the elevated CO2 chambers, primarily in the C3 grass group. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=165">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=165</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: aboveground-net-primary-productivitiy, ars, biomass, carbon-dioxide, data-gov, disturbance, np215, nsf-lterlong-term-ecological-research, plants, populations, primary-production, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture
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

<p>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 (<a href="http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429">http://digitool.library.colostate.edu/R/?func=collections&collection_id=3429</a>). 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: <a href="http://hdl.handle.net/10217/82454">http://hdl.handle.net/10217/82454</a>.
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. </p><div><br>Resources in this dataset:</div><br><ul><li><p>Resource Title: Website Pointer to html file.</p> <p>File Name: Web Page, url: <a href="https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=164">https://portal.edirepository.org/nis/mapbrowse?scope=knb-lter-sgs&identifier=164</a> </p><p>Webpage with information and links to data files for download</p></li></ul><p></p>

Tags: ars, carbon-dioxide, data-gov, disturbance, inorganic-nutrients, np215, nsf-lterlong-term-ecological-research, soil-water, usda-ars-natural-resources-and-sustainable-agricultural-systems-national-program-215-pasture-fo
Organization: Department of Agriculture