Skip to main content
USGS - science for a changing world
Advanced Search

Filters: Tags: grassland (X)

179 results (54ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
ARS scientists publish results of their research projects in many formats. Listed below are the publications from research projects conducted at this location. Clicking on a publication title will take you to more information on the publication. Clicking on the reprint icon will take you to the publication reprint.
thumbnail
This file represents the final version of an assessment of the extent, condition, and distribution of grassland types in Arizona as indicated by expert interviews and field verification. Coverage includes the state of Arizona, Southwestern portions of the state of New Mexico, and the Northern portion of Sonora, Mexico.
thumbnail
The Desert Renewable Energy Conservation Plan (DRECP), a major component of California's renewable energy planning efforts, will help provide effective protection and conservation of desert ecosystems while allowing for the appropriate development of renewable energy projects. The DRECP is focused on the desert regions and adjacent lands of seven California counties - Imperial, Inyo, Kern, Los Angeles, Riverside, San Bernardino, and San Diego. It is being prepared through an unprecedented collaborative effort between the California Energy Commission, California Department of Fish and Wildlife, the U.S. Bureau of Land Management, and the U.S. Fish and Wildlife Service also known as the Renewable Energy Action Team....
What are current conditions for important park natural resources? What are the critical data and knowledge gaps? What are some of the factors that are influencing park resource conditions? Natural Resource Condition Assessments (NRCAs) evaluate and report on the above for a subset of important natural resources in national park units (hereafter, parks). Focal study resources and indicators are selected on a park-by-park basis, guided by use of structured resource assessment and reporting frameworks. Considerations include park resource setting and enabling legislation (what are this park's most important natural resources?) and presently available data and expertise (what can be evaluated at this time?). In addition...
thumbnail
Natural landscapes in the Southwestern United States are changing. In recent decades, rising temperatures and drought have led to drier conditions, contributed to large-scale ecological impacts, and affected many plant and animal species across the region. The current and future trajectory of climate change underscores the need for managers and conservation professionals to understand the impacts of these patterns on natural resources. In this regional assessment of the Southwest Climate Change Initiative, we evaluate changes in annual average temperatures from 1951–2006 across major habitats and large watersheds and compare these changes to the number of species of conservation concern that are found within these...
thumbnail
This dataset contains all National Forest Inventoried Roadless Areas (IRAs) for the Alaska Region (R10). The IRA data was originally submitted to GSTC by all national forests through their Regional Offices for the Forest Service's Roadless Area Conservation Initiative. The data was consolidated at the GSTC and used in the Draft Environment Impact Statement. Between the draft and final stages of the Environmental Impact Statement, the data was updated by the forests to reflect any corrections to Inventoried Roadless Areas that were based on their existing forest plan. The data was also supplemented to include Special Designated Area information and to include Inventoried Roadless Areas within Special Designated...
thumbnail
Vegetation and land-cover changes are not always directional but follow complex trajectories over space and time, driven by changing anthropogenic and abiotic conditions. We present a multi-observational approach to land-change analysis that addresses the complex geographic and temporal variability of vegetation changes related to climate and land use. Using land-ownership data as a proxy for land-use practices, multitemporal land-cover maps, and repeat photography dating to the late 19th century, we examine changing spatial and temporal distributions of two vegetation types with high conservation value in the southwestern United States: grasslands and riparian vegetation. In contrast to many reported vegetation...
thumbnail
A battery of questions was developed and applied to different stakeholders immersed in knowledge of the condition and the use of grazing of grasslands. One hundred people were surveyed amongst livestock producers (both from private ranches and from communal ejidos), and students and researchers at regional institutions involved in agricultural sciences in different states of Mexico: Coahuila, Durango, San Luis Potosí, and Jalisco. The objective of the survey was to determine aspects of stakeholders’ interpretation of the condition of grasslands in their region under conditions of extensive grazing, such as soil condition, harvest efficiency, vegetation condition, openness to community organizing of grazing, capacity...
thumbnail
A Vision for the Chihuahuan Desert The Chihuahuan Desert, shared by two nations, is one of the most biologically rich desert ecoregions in the world, alive with large mammals, birds, reptiles and an unmatched diversity of cactus species. The desert’s rivers, streams and springs are considered to be of global significance, home to fish species found nowhere else on earth. Our vision is a Chihuahuan Desert where governments, local communities, non-governmental organizations, academic institutions, landowners, and other stakeholders are working together to ensure that the richness and diversity of wildlife, habitats, natural communities, and ecological processes of the Chihuahuan Desert are conserved and, where necessary,...
thumbnail
The National Forest Management Act (NFMA) of 1976 requires every national forest or grassland managed by the U.S. Forest Service to develop and maintain a Land and Resource Management Plan (often referred to as a forest plan). The forest plan is the principle long-range guidance document for each forest or grassland, providing direction for project and activity decision making. Forest plans articulate goals and objectives, the kinds of uses that are suitable for areas of a national forest, management standards and guidelines that apply to different kinds of activities, and the designation of special areas like Research Natural Areas. Forest plans are strategic in nature and do not compel any action or authorize...
thumbnail
This map represents the change between 1971-2000 and 2071-2100 in the annual peak fraction of total live vegetation carbon held in herbaceous plants, as simulated by the model MC1 under the CSIRO Mk3 future climate projection and A2 anthropogenic emissions scenario. The range of data values is from -0.741 to +0.999. The mean value is +0.107. Data values are calculated as GFRAC(2071-2100) minus GFRAC(1971-2000). GFRAC data is from MC1 version B60. The dynamic global vegetation model MC1 (e.g. Bachelet et al. 2001) was used to simulate vegetation dynamics, associated carbon and nitrogen cycle, water budget, and wild fire impacts at two study sites in eastern Oregon (Deschutes and Fremont-Winema National Forests)...
thumbnail
This dataset contains generalized landcover data for the Prairie Farm Rehabilitation Administration (PFRA) determined agricultural extent of Manitoba and Saskatchewan. This dataset was subset into two shapefiles. The other half of this dataset covers PFRA agricultural areas of Alberta and British Columbia. The Landcover Generalization process was undertaken to solve rendering problems of the original vectorized landcover data due to its unwieldy/overwhelming size. LANDSAT 7 imagery used in the process was collected during the WGTPP. This landcover imagery has a 30 meter resolution and is stored in over 1,100 vectorized 1:50,000 map sheet tiles. The data requires over seven gigabytes of disc space. If the user wishes...
thumbnail
This study examines the establishment patterns of exotic and ruderal species along trail corridors in grassland areas of the Colorado Front Range. The effects of trail presence, trail age, and trail traffic levels on exotic and ruderal species establishment are explored to ascertain the potential impacts of trails on surrounding vegetation. Established trails exhibited a greater presence of exotic and ruderal species along the immediate trailside, showing that disturbed trailsides tend to encourage the growth of these species over time. Furthermore, the established trails exhibited significantly less native, nonruderal, and overall species richness at the trailside. These trailside patterns did not show a significant...
thumbnail
Proportion of grassland land cover within a 5-km radius developed using a circular focal moving window analysis.
Prairie restoration at the northern edge of the Great Plains can be frustrated by previously established non-native perennial grasses. We compared the emergence of a widely introduced grass, Agropyron cristatum, and a common native grass, Bouteloua gracilis, in a 4-year-old field experiment in which the Agropyron-dominated vegetation had either been left intact or treated annually with herbicide. This was done at two levels of water supply, reflecting conditions expected in wet and dry years, to examine the effects of among-year variability in precipitation. Water addition significantly increased the emergence of both surface-sown and buried (1 cm deep) seeds. Herbicide treatment of neighbors did not increase the...
thumbnail
Selected GIS datasets for the Southwestern Region are available for download from this page. Use of most of these files requires GIS software such as ArcGIS, ArcView, ArcInfo or ArcExplorer. Most of these datasets are provided in ArcView shapefile (shp) format. ArcExplorer, a free, basic GIS software package available from ESRI will read the data in shapefile format (ESRI and the ESRI Logo are licensed trademarks of Environmental Systems Research Institute, Inc.). Some datasets will also have related tables that can be used with the geographic data. Tabular data will be in Microsoft Excel format. All files have been compressed with zip and can be uncompressed with programs such as WinZip. Be aware that some of the...
thumbnail
Pima County makes extensive use of Geographical Information System (GIS) technology for making maps. For the Sonoran Desert Conservation Plan, this was an important technology for assembling the extensive existing data, both digital and non-digital, identifying critical gaps in the data and potential remedies, and providing a means for analyzing the information on biological and physical resources over the six million acre study area. SDCP Mapguide was created to display many of the natural resource GIS data layers, but Mapguide is being replaced with PimaMaps. You can use either to make your own overlays on aerial photos, line maps, or USGS topography. Customize your online map while panning and zooming on the...
thumbnail
The Southwest Regional Gap Analysis Project (SWReGAP) is an update of the Gap Analysis Program’s mapping and assessment of biodiversity for the five-state region encompassing Arizona, Colorado, Nevada, New Mexico, and Utah. It is a multi-institutional cooperative effort coordinated by the U.S. Geological Survey Gap Analysis Program. The primary objective of the update is to use a coordinated mapping approach to create detailed, seamless GIS maps of land cover, all native terrestrial vertebrate species, land stewardship, and management status, and to analyze this information to identify those biotic elements that are underrepresented on lands managed for their long term conservation or are “gaps.”
thumbnail
At the direction of the ACC, the 99th Civil Engineering Squadron, Natural and Cultural Resources Flight (99 CES/CEVN) has prepared an Integrated Natural Resource Management Plan (INRMP) to serve as a practical management guideline for the day-to-day operations and management of the natural resources on NAFB and NTTR. The INRMP incorporates natural resource management policies, available regulatory guidance documents, and current natural resource data for NAFB and NTTR to produce a practical guidance document that recognizes and respects the goals and objectives of the Nellis mission while conserving and sustaining the natural resources of both areas. To meet that end, the INRMP provides simple natural resource management...


map background search result map search result map Impacts of recreation trails on exotic and ruderal species distribution in grassland areas along the Colorado Front Range. United States Forest Service (USFS) Inventoried Roadless Areas for Alaska (USA) Change in the fraction of total live vegetation carbon held in herbaceous plants between 1971-2000 and 2071-2000, as simulated by MC1 under CSIRO Mk3 A2 for the eastern Oregon study area, Oregon, USA Prairie Farm Rehabilitation Administration (PFRA) Generalized Lancover - Manitoba and Saskatchewan, Canada Proportion of Grassland Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area Desert Renewable Energy Conservation Plan Extent and Condition of Grasslands in Arizona, Northern Mexico, and Southwestern New Mexico Southwest Regional Gap Analysis Project Sonoran Desert Conservation Plan MapGuide Map Natural Resource Condition Assessments Managing Changing Landscapes in the Southwestern United States Southwest Watershed Research Publications Historical and Contemporary Geographic Data Reveal Complex Spatial and Temporal Responses of Vegetation to Climate and Land Stewardship Ecoregion-Based Conservation in the Chihuahuan Desert USDA Forest Service Southwestern Region GIS Datasets United States Department of Agriculture Forest Service Southwestern Region Plan Revision Nellis Air Force Base Plan 126-4 Perceptions of the condition of semiarid grasslands under grazing regimes in Mexico/ Percepción de la condición del pastizal  bajo pastoreo, en México semiárido Impacts of recreation trails on exotic and ruderal species distribution in grassland areas along the Colorado Front Range. Change in the fraction of total live vegetation carbon held in herbaceous plants between 1971-2000 and 2071-2000, as simulated by MC1 under CSIRO Mk3 A2 for the eastern Oregon study area, Oregon, USA Historical and Contemporary Geographic Data Reveal Complex Spatial and Temporal Responses of Vegetation to Climate and Land Stewardship Sonoran Desert Conservation Plan MapGuide Map Nellis Air Force Base Plan 126-4 Desert Renewable Energy Conservation Plan Extent and Condition of Grasslands in Arizona, Northern Mexico, and Southwestern New Mexico USDA Forest Service Southwestern Region GIS Datasets United States Department of Agriculture Forest Service Southwestern Region Plan Revision Prairie Farm Rehabilitation Administration (PFRA) Generalized Lancover - Manitoba and Saskatchewan, Canada Managing Changing Landscapes in the Southwestern United States Proportion of Grassland Land Cover (5-km scale) in the Wyoming Basins Ecoregional Assessment area Ecoregion-Based Conservation in the Chihuahuan Desert United States Forest Service (USFS) Inventoried Roadless Areas for Alaska (USA) Southwest Regional Gap Analysis Project Perceptions of the condition of semiarid grasslands under grazing regimes in Mexico/ Percepción de la condición del pastizal  bajo pastoreo, en México semiárido Southwest Watershed Research Publications Natural Resource Condition Assessments