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The introduction of nonnative plant species may decrease ecosystem stability by altering the availability of nitrogen (N) for plant growth. Invasive species can impact N availability by changing litter quantity and quality, rates of N2-fixation, or rates of N loss. We quantified the effects of invasion by the annual grass Bromus tectorum on N cycling in an arid grassland on the Colorado Plateau (USA). The invasion occurred in 1994 in two community types in an undisturbed grassland. This natural experiment allowed us to measure the immediate responses following invasion without the confounding effects of previous disturbance. Litter biomass and the C:N and lignin:N ratios were measured to determine the effects on...
Shrub encroachment into grass-dominated biomes is occurring globally due to a variety of anthropogenic activities, but the consequences for carbon (C) inputs, storage and cycling remain unclear. We studied eight North American graminoid-dominated ecosystems invaded by shrubs, from arctic tundra to Atlantic coastal dunes, to quantify patterns and controls of C inputs via aboveground net primary production (ANPP). Across a fourfold range in mean annual precipitation (MAP), a key regulator of ecosystem C input at the continental scale, shrub invasion decreased ANPP in xeric sites, but dramatically increased ANPP (>1000gm-2) at high MAP, where shrub patches maintained extraordinarily high leaf area. Concurrently, the...
Water is a key driver of ecosystem processes in aridland ecosystems. Thus, changes in climate could have significant impacts on ecosystem structure and function. In the southwestern US, interactions among regional climate drivers (e.g., El Ni�o Southern Oscillation) and topographically controlled convective storms create a spatially and temporally variable precipitation regime that governs the rate and magnitude of ecosystem processes. We quantified the spatial and temporal distribution of reduced grassland greenness in response to seasonal and annual variation in precipitation at two scales at the Sevilleta Long Term Ecological Research site in central New Mexico, using Normalized Difference Vegetation Index (NDVI)...
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The introduction of nonnative plant species may decrease ecosystem stability by altering the availability of nitrogen (N) for plant growth. Invasive species can impact N availability by changing litter quantity and quality, rates of N2-fixation, or rates of N loss. We quantified the effects of invasion by the annual grass Bromus tectorum on N cycling in an arid grassland on the Colorado Plateau (USA). The invasion occurred in 1994 in two community types in an undisturbed grassland. This natural experiment allowed us to measure the immediate responses following invasion without the confounding effects of previous disturbance. Litter biomass and the C:N and lignin:N ratios were measured to determine the effects on...
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Honey bee colonies located in 2 apiaries in North Dakota were fitted with two types of monitoring device: pollen traps and scales. Data were collected from devices periodically throughout the 2014 season (May-October). Data derived from pollen traps included: the total fresh weight of pollen collected, the percent crude protein content, the percent content of each amino acid, and DNA identification of floral plant sources. Scales collected colony weight through time.
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The purpose of this project was to map the estimated distribution of grassland communities of the Southern Great Plains prior to Euro-American settlement. The Southern Great Plains Rapid Ecoregional Assessment (REA), under the direction of the Bureau of Land Management and the Great Plains Landscape Conservation Cooperative, includes four ecoregions: the High Plains, Central Great Plains, Southwestern Tablelands, and the Nebraska Sand Hills. The REA advisors and stakeholders determined that the mapping accuracy of available national land-cover maps was insufficient in many areas to adequately address management questions for the REA. Based on the recommendation of the REA stakeholders, we estimated the potential...
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This raster data depicts the modeled distribution of three grassland states: Biocrust, Grass-bare, and Annualized-bare. We developed models of bare ground, total vegetation, exotic grasses and biological soil crust using spectral data from three year composites of growing season (March-October) Landsat data in Google Earth Engine and field data that were collected over the same period at monitoring sites. The resulting regression models were used to characterize the spatial distribution of putative grassland ecological states across our 251,430 ha study area in and around Canyonlands National Park, UT. This model illustrates how a remote sensing approach to land-cover change can be implemented to guide dryland ecosystem...
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The Southern Great Plains Crucial Habitat Assessment Tool (SGP CHAT) is a dynamic online mapping application created by a coalition of states at the request of the Western Governors Association’s Wildlife Council to provide information on lesser prairie-chicken (LEPC) habitat (and other species in coming years) to help facilitate responsible development of natural resources. The SGP CHAT encompasses those portions of Colorado, Kansas, New Mexico, Oklahoma, and Texas that fall within the historic range of the LEPC. Representatives from each state worked together to acquire the best bio-geophysical data available for the region to model the habitat probability and identify important movement corridors within and between...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: BIRDS, Colorado, Colorado, Federal resource managers, GRASSLANDS, All tags...
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The GET is a cross-programmatic, cross-regional team consisting of US Fish and Wildlife Service grassland ecosystem conservation practitioners.GET mission: We will work within and across US Fish and Wildlife Service programs and with external partners and partnerships to deliver strategic conservation actions and information for the grasslands biome and FWS trust species within the biome.GET vision: Our vision is a healthy, functional grasslands biome that supports wildlife and people.GET Principles: We bring people together for conservation - we engage people with diverse perspectives; listen to understand past and present circumstances, and then work together to address challenges; we co-develop and acquire science...
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Identify, gather, and combine available data sets throughout the MR, Mississippi River, and their tributaries to develop a range-wide species status assessments to support USFWS 12 month findings for Sicklefin and Sturgeon Chub. Evaluate and analyze the combined data sets for potential relationships between system drivers (e.g., chub populations and annual hydrologic and water temperature changes, presence of low-head dams, point and non-point source water quality, dredging, water intakes, etc.). Initial analyses will include single-factor analyses for each environmental driver at spatial scales deemed appropriate based on identified, potentially isolated, populations. These analyses will then be conducted at the...
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Man-made water sources have been used as a management tool for wildlife, especially in arid regions, but the value of these water sources for wildlife populations is not well understood. In particular, the value of water as a conservation tool for Lesser Prairie-Chickens (Tympanuchus pallidicinctus) is unknown. However, this is a relevant issue due to a heightened conservation concern for the species and its occupancy of an arid landscape anticipated to experience warmer, drier springs and winters. We assessed if Lesser Prairie-Chickens would use commercially available wildlife water guzzlers and if there was any apparent selection between two design types. We confirmed that Lesser Prairie-Chickens would use bird...
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Man-made water sources have been used as a management tool for wildlife, especially in arid regions, but the value of these water sources for wildlife populations is not well understood. In particular, the value of water as a conservation tool for Lesser Prairie-Chickens (Tympanuchus pallidicinctus) is unknown. However, this is a relevant issue due to a heightened conservation concern for the species and its occupancy of an arid landscape anticipated to experience warmer, drier springs and winters. We assessed if Lesser Prairie-Chickens would use commercially available wildlife water guzzlers and if there was any apparent selection between two design types. We confirmed that Lesser Prairie-Chickens would use bird...
Climate change predictions include warming and drying trends, which are expected to be particularly pronounced in the southwestern United States. In this region, grassland dynamics are tightly linked to available moisture, yet it has proven difficult to resolve what aspects of climate drive vegetation change.Here, we combine climate and soil properties with a mechanistic soil water model to explain temporal fluctuations in perennial grass cover, quantify where and the degree to which incorporating soil water dynamics enhances our ability to understand temporal patterns, and explore the potential consequences of climate change by assessing future trajectories of important climate and soil water variables.Our analyses...
This spatial data set provides information pertaining to the known land use and disturbance history for lands within the March 2018 administrative boundary of the North Unit of Badlands National Park, South Dakota. Land use and disturbance history presented here are not a comprehensive record of all potential land uses and disturbances but rather a record of known and documented land uses and disturbances based on the best available information. Additional land use and disturbance information may exist but due to time and budget constraints may not have been discovered during the research and development of this data set. The information in this data set was gathered through a variety of sources including but not...
This data set contains output from the dynamic vegetation model MC1, as modified to simulate future woody encroachment in the northern Great Plains. Simulations were done for the historical period (1895-2005) and the future period (2006-2100). Separate simulations were done for eastern and western portions of the region, with the eastern simulations using model parameters appropriate for Juniperus virginiana as the major evergreen needle-leaf life form, and the western simulations using model parameters appropriate for Pinus ponderosa as the major evergreen needle-leaf life form. Simulations in each portion were run for two A2 emissions scenario climate projections (CSIRO, representing moderate temperature increases...
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This dataset includes pollen sample weight in grams and percent crude protein collected by honey bees (Apis mellifera) across 38 apiaries in Minnesota, North Dakota, and South Dakota approximately weekly from June through September in 2015 and 2016. Additionally it includes the hectares of different land covers (corn, Zea mays, & soybeans, Glycine max, grasslands, bee forage crops, and wetlands) located within a 4 km radius of each apiary.
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Sagebrush ecosystems and wildlife that depend on them are under pressure from development, changing climate, as well as natural and human-caused disturbance. Mule deer (Odocoileus hemionus) are of particular concern due to population declines across many western states. We initiated a study to evaluate landscape-level changes ( disturbances, habitat treatments, development, and climate change) in Wyoming. This dataset contains age ratios (the number of juveniles to adult female mule deer) for 36 herd units in Wyoming, USA from 1985-2019. Age ratios provide a consistent metric of population demographics, including an index of recruitment (survival rate of young), which can be a sensitive metric of population change....
Grasslands are among the most threatened ecosystems on the planet (Hoekstra et al 2004). Recently, the bird conservation and grasslands communities have united around a forward looking approach to conservation planning. To accomplish this the following information is needed:1) The location, quantity, and quality of desert grasslands,2) the regional risks associated with loss or degradation of grasslands,3) the vulnerability of those grasslands and the species that depend on them to environmental and climate stressors,4) where and what types of programs or partnerships exist on the landscape to address system stressors and implement further conservation programs, and5) what capacity for conservation do these entities...
Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2014, AZ-01, AZ-02, AZ-03, AZ-04, All tags...
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The Desert Landscape Conservation Cooperative (LCC) is a partnership formed and directed by resource management entities as well as interested public and private entities in the Mojave, Sonoran, and Chihuahuan Desert and montane sky island regions of the southwestern United States and northern Mexico. Desert LCC science depends on access to transboundary base datasets. Given the importance of vegetation such as grasslands and riparian vegetation in conservation science, a bi-national, landscape-scale vegetation data layer with classes relevant to Desert LCC research is crucial. One objective of this project is to investigate appropriate methodologies and landscape scales to create a Desert LCC binational land cover...
Categories: Data, Project; Tags: 2014, AZ-01, AZ-02, AZ-03, AZ-04, All tags...
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This spatial data set provides information pertaining to the known land use and disturbance history for lands within the March 2018 administrative boundary of Agate Fossil Beds National Monument, Nebraska. Land use and disturbance history presented here are not a comprehensive record of all potential land uses and disturbances but rather a record of known and documented land uses and disturbances based on the best available information. Additional land use and disturbance information may exist but due to time and budget constraints may not have been discovered during the research and development of this data set. The information in this data set was gathered through a variety of sources including but not limited...
map background search result map search result map Exotic plant invasion alters nitrogen dynamics in an arid grassland An Adaptive Management Approach to Assessing Water as a Critical Habitat Need for Lesser Prairie-Chicken Reproduction Grasslands Conservation Geospatial Data Compilation and Synthesis Desert LCC Land Cover Map Pilot Project Southern Great Plains Crucial Habitat Assessment Tool (SGP CHAT) Estimated Historical Distribution of Grassland Communities of the Southern Great Plains Final Report: Assessment of Lesser Prairie-Chicken Use of Wildlife Water Guzzlers Using colony monitoring devices to evaluate the impacts of land use and forage quality on honey bee health datasets Grassland State and Transition Map of Canyonlands National Park Needles District and Indian Creek Grazing Allotment Land use and disturbance history for Agate Fossil Beds National Monument, Nebraska, through March 2018 Data release for: Do the quality and quantity of honey bee-collected pollen vary across an agricultural land-use gradient? Compilation, synthesis, and analysis of extant sickelfin and sturgeon chub distribution, population, and habitat data to inform species status assessments and 12-month finding and support pallid sturgeon recovery Grassland Ecosystem Team (GET) Age ratios and landscape change covariates for mule deer (Odocoileus hemionus) herd units in Wyoming, USA, 1985-2019 Using colony monitoring devices to evaluate the impacts of land use and forage quality on honey bee health datasets Exotic plant invasion alters nitrogen dynamics in an arid grassland Grassland State and Transition Map of Canyonlands National Park Needles District and Indian Creek Grazing Allotment Age ratios and landscape change covariates for mule deer (Odocoileus hemionus) herd units in Wyoming, USA, 1985-2019 Final Report: Assessment of Lesser Prairie-Chicken Use of Wildlife Water Guzzlers Data release for: Do the quality and quantity of honey bee-collected pollen vary across an agricultural land-use gradient? An Adaptive Management Approach to Assessing Water as a Critical Habitat Need for Lesser Prairie-Chicken Reproduction Southern Great Plains Crucial Habitat Assessment Tool (SGP CHAT) Estimated Historical Distribution of Grassland Communities of the Southern Great Plains Grasslands Conservation Geospatial Data Compilation and Synthesis Desert LCC Land Cover Map Pilot Project Compilation, synthesis, and analysis of extant sickelfin and sturgeon chub distribution, population, and habitat data to inform species status assessments and 12-month finding and support pallid sturgeon recovery Grassland Ecosystem Team (GET)