Skip to main content
Advanced Search

Filters: Tags: grasslands (X)

138 results (114ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
We evaluated the effects of livestock grazing on C content of the plant?soil system (to 60 cm) of two semi-arid grasslands: a mixed-grass prairie (grazed 12 years), and a short-grass steppe (grazed 56 years). Grazing treatments included season-long grazing at heavy and light stocking rates, and non-grazed exclosures. Significantly higher soil C (0?30cm) was measured in grazed pastures compared to non-grazed exclosures, although for the short-grass steppe higher soil C was observed with the heavy grazing treatment only. Excluding grazing caused an immobilization of C in excessive aboveground plant litter, and an increase in annual forbs and grasses which lack dense fibrous rooting systems conducive to soil organic...
thumbnail
The Wisconsin Wildlife Action Plan (2016) identified opportunity scores for eight grassland natural community types in each ecological landscape of Wisconsin. This collection of spatial datasets summarizes and displays these opportunity scores. Grassland natural community types include: dry prairie, dry-mesic prairie, mesic prairie, wet-mesic prairie, wet prairie, sand prairie, bracken grassland, and surrogate grassland
thumbnail
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...
thumbnail
The dataset consists of abundance information of butterfly species (61 species) collected at 25 sites in northwest Indiana in 1998 and 1999. Each site was surveyed 21 times. Auxiliary data on environmental conditions were collected to allow us to relate habitat differences among sites to differences in abundance and composition of the butterfly community.
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...
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)...
thumbnail
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...
thumbnail
Phase 2 Restoration Sites Pre-Clearing, 09/23/2013, Grasslands, San Diego, California.
thumbnail
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.
thumbnail
Conservation Opportunity Areas (COA) are intended to guide conservation activities at a landscape level. Landscape conservation is a developing theme across the country and throughout Indiana. Building off the successes of other Indiana landscape initiatives, like Goose Pond Fish and Wildlife Area and the Healthy Rivers Initiative, Indiana DFW has identified opportunities on the landscape to focus conservation efforts over the next decade. These COA were identified as a way to direct actions toward specific areas on Indiana’s landscape.
thumbnail
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...
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...
thumbnail
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...
thumbnail
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...
thumbnail
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...
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...
thumbnail
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...
thumbnail
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...
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 Phase 2 Restoration Sites Pre-Clearing, 09/23/2013, Grasslands Southern Great Plains Crucial Habitat Assessment Tool (SGP CHAT) Estimated Historical Distribution of Grassland Communities of the Southern Great Plains Indiana Grassland COAs WI Ecological Landscapes and Natural Community Opportunity Scores 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 Butterfly community abundance and distribution along a gradient of woody vegetation density at Indiana Dunes National Lakeshore, Hoosier Prairie Nature Preserve, and Tefft Savanna Nature Preserve, Indiana 1998-1999 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) Using colony monitoring devices to evaluate the impacts of land use and forage quality on honey bee health datasets Butterfly community abundance and distribution along a gradient of woody vegetation density at Indiana Dunes National Lakeshore, Hoosier Prairie Nature Preserve, and Tefft Savanna Nature Preserve, Indiana 1998-1999 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 Indiana Grassland COAs WI Ecological Landscapes and Natural Community Opportunity Scores Final Report: Assessment of Lesser Prairie-Chicken Use of Wildlife Water Guzzlers 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 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)