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Ecoregion Maps and GIS Resources
The map of the Ecoregions of the United States is available for download in the following formats and sizes below. Here is a x 11 inch 11 x 17 inch Data for Ecoregions of the Conterminous United States. Data for the ecoregions of the conterminous United States is available through the Forest & Rangeland Ecosystem Science Center. Contact Us. (NOTE: maps and GIS files may differ. To make sure you are using the most current ecoregion data, download shapefiles of ecoregions) GIS data (shapefiles, metadata and symbology): Clickable map of Level III and IV Ecoregions by state: Access to Level III and IV maps, GIS data, and descriptive information can be obtained by clicking on any. Download Map. Ecoregions of the Continents (MB compressed, jpeg, 5K x K pixels) The continental ecoregions map has been reprojected to geodetic coordinates (lat/long) at the World Conservation Monitoring Centre. It is available from NOAA's National Geophysical Data Center.
Ecoregion download files by state
We've made some changes to EPA. To make sure you are using the most current ecoregion ecoregion download files by state, download shapefiles of ecoregions. Ecoregions denote areas of general similarity in ecosystems and in the type, ecoregion download files by state, quality, and quantity of environmental resources, ecoregion download files by state.
They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. By recognizing the spatial differences in the capacities and potentials of ecosystems, ecoregions stratify the environment by its probable response to disturbance Bryce, Omernik, and Larsen, Ecoregions are general purpose regions that are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources in the same geographical areas Omernik and others, A Roman numeral hierarchical scheme has been adopted for different levels of ecological regions.
Level I is the coarsest level, dividing North America into 15 ecological regions. The approach used to compile the ecoregion map of Arkansas is based on the premise that ecological regions can be identified through the analysis of the spatial patterns and the composition of biotic and abiotic characteristics that affect or reflect differences in ecosystem quality and integrity Wiken, ; Omernik, The relative importance of each characteristic varies from one ecological region to another regardless of ecoregion hierarchical level.
In Arkansas, there are 7 level III ecoregions and 32 level IV ecoregions; all but four level IV ecoregions continue into ecologically similar parts of adjacent states Chapman and others,a, b; Griffith, Omernik, and Azevedo, Elevated karst plateaus, folded mountains, agricultural valleys, forested uplands, and bottomland forests occur.
Fire-maintained prairie was once extensive in several parts of the state. The ecoregion map on this poster was compiled at a scale of , and depicts revisions and subdivisions of earlier level III ecoregions that were originally compiled at a smaller scale U. Environmental Protection Agency, ; Omernik, Collaboration and consultation also occurred with the U.
This project is associated with an interagency effort to develop a common framework of ecological regions McMahon and others, Reaching that objective requires recognition of the differences in the conceptual approaches and mapping methodologies applied to develop the most common ecoregion-type frameworks, including those developed by the U. Department of Agriculture—Soil Conservation Service As each of these frameworks is further refined, their differences are becoming less discernible.
Each collaborative ecoregion project, such as this one in Arkansas, is a step toward attaining consensus and consistency in ecoregion frameworks for the entire nation. Bailey, ecoregion download files by state, R. Department of Agriculture—Forest Service, map scale , Bryce, S.
Chapman, S. Geological Survey, map scale , Gallant, A. Griffith, G. Geological Survey, ecoregion download files by state, scaleMcMahon, G. Omernik, J. Wiken, E. Chapman Dynamac CorporationJames M. Pagan, Jr. Geological SurveyBarbara A. Loveland U. Geological Survey map scale , Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources; they are designed to serve as a spatial framework for the research, assessment, management, ecoregion download files by state, and monitoring of ecosystems and ecosystem components.
By recognizing the spatial differences in the capacities and potentials of ecosystems, ecoregions stratify the environment by its probable response to disturbance Bryce and others, These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and non-government organizations that are responsible for different types of resources within the same geographical areas Omernik and others, The approach used to compile this map is based on the premise that ecological regions can be identified through the analysis of the spatial patterns and the composition of biotic and abiotic phenomena that affect or reflect differences in ecosystem quality and integrity Wiken, ; Omernik, These phenomena include geology, physiography, vegetation, climate, soils, land use, wildlife, ecoregion download files by state hydrology.
The relative importance of each characteristic varies from one ecological region to another regardless of the hierarchical level. Department of Interior - U. This project is associated with an interagency effort to develop a common framework of ecological regions. Reaching that objective requires recognition of the differences in the conceptual approaches ecoregion download files by state mapping methodologies that have been used to develop the most common ecoregion-type frameworks, including those developed by the U.
Regional collaborative ecoregion download files by state such as this one in the Mississippi Alluvial Plain, where agreement can be reached among multiple resource management agencies, are a step toward attaining consensus and consistency in ecoregion frameworks for the entire nation.
Department of Agriculture - Forest Service, scale , Chapman Dynamac CorporationBarbara A. Griffith Dynamac CorporationDaniel J.
These general purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas Omernik and others, The approach used to compile the ecoregion map of Louisiana is based on the premise that ecological regions can be identified through the analysis of the spatial patterns and the composition of biotic and abiotic characteristics that affect or reflect differences in ecosystem quality and integrity Wiken, ; Omernik, These characteristics include geology, physiography, vegetation, climate, soils, land use, wildlife, and hydrology.
Louisiana contains barrier islands and coastal lowlands, large river floodplains, rolling and hilly coastal plains with evergreen and deciduous forests, and a variety of aquatic habitats. There are 6 level III ecoregions and 28 level IV ecoregions, and most of these continue into ecologically similar parts of adjacent states Chapman and others, ; Griffith and others, ; Woods and others, Reaching that objective requires recognition of the differences in the conceptual approaches and mapping methodologies applied to develop the most common ecoregion download files by state frameworks, including those developed by the USFS Bailey and others,the USEPA Omernik, and the U.
Each collaborative ecoregion project, such as this one in Louisiana, is a step toward attaining consensus and consistency in ecoregion frameworks for the entire nation. Woods, A. Griffith Dynamac CorporationJames M. Chapman Dynamac Corporation. New Mexico contains semiarid shrub- and grass-covered plains, forested mountains, ecoregion download files by state, glaciated peaks, woodland- and shrubland-covered hills, lava fields and volcanic plateaus, river floodplains, and arid deserts.
Ecological diversity is enormous. There are 8 level III ecoregions and 55 level IV ecoregions in New Mexico and many continue into ecologically similar parts of adjacent states Griffith and others, ; Woods and others, ; Chapman and others, The project is associated with an interagency effort to develop a common framework of ecological regions McMahon and others, Department of Agriculture—Soil Conservation Service, Collaborative ecoregion projects, such as this one in New Mexico, are a step toward attaining consensus and consistency in ecoregion frameworks for the entire nation.
Jacobi Jacobi and AssociatesChristopher M. Moran Indus Corporation. Environmental Protection Agency, Methods used ecoregion download files by state the U. The Oklahoma ecoregion map was compiled at a scale of ,; it revises and subdivides an earlier level III ecoregion map that was originally compiled at a smaller scale Omernik, ; U.
The approach used to compile the Oklahoma ecoregion map is based on the premise that ecoregions can be identified through the analysis of the spatial patterns and the composition of biotic and abiotic characteristics that affect or reflect differences in ecosystem quality and integrity Wiken, ; Omernik, The relative importance of each characteristic varies from one ecoregion to another regardless of ecoregion hierarchical level.
In Oklahoma, there are 12 level III ecoregions and 46 level IV ecoregions; all but twelve of these level IV ecoregions continue into ecologically similar parts of adjacent states Chapman and others,; Griffith and others, ; Woods and others, Oklahoma contains vast plains, elevated karst plateaus, hills, and folded, low mountains. Precipitation increases eastward, rainfall variability increases westward, and both mean annual temperature and the length of the growing season increase southward.
Soils influence the effectiveness and availability of moisture for plant life. Forests cover most of the Ozark Plateau and the Ouachita Mountains; they become progressively more stunted and open westward. Southern pine forests, typical of the Gulf Coastal Plain, occur in the southeast. Tall grass prairie, mixed grass prairie, ecoregion download files by state, and short grass prairie are native to central and western Oklahoma.
Mesquite and other xeric plants characterize the dry southwest. Elevations drop from about 5, feet on Black Mesa in the ecoregion download files by state Panhandle to about feet in southeastern Oklahoma. Rivers follow regional topographic trends. Impoundments are common, and impact hydrology and the abundance and distribution of fish.
The strong east-west zonation of vegetation and climate in Oklahoma significantly influences the distribution of fauna, including reptiles, mammals, and insects Blair and Hubbell, ; Webb, The western boundary of deciduous forest limits the westward extension of many eastern species. Great Plains fauna are found in intervening districts. Today, the state is a mosaic of grazing land, cropland, woodland, forests, and abandoned farmland.
Wheat and alfalfa are the main crops. Grain sorghum is well adapted to sandy soils. Soybeans are becoming increasingly common on eastern plains and on moister parts of the prairie. Cotton is now concentrated on irrigated farmland in the southwest. Corn, once a major Oklahoma crop, has declined in importance ecoregion download files by state to soil depletion and periodic droughts. Reaching that objective requires recognition of the differences in the conceptual approaches and mapping methodologies that have been applied ecoregion download files by state develop the most common ecoregion-type frameworks, including those developed by the U, ecoregion download files by state.
Each collaborative ecoregion project, ecoregion download files by state, such as this one in Oklahoma, is a step toward attaining consensus and consistency in ecoregion frameworks for the entire nation. Blair, W. Online First, ecoregion download files by state, no. Omernik U. Geological SurveyDaniel R.
Regions of the USA
, time: 4:11Ecoregion download files by state
Download Map. Ecoregions of the Continents (MB compressed, jpeg, 5K x K pixels) The continental ecoregions map has been reprojected to geodetic coordinates (lat/long) at the World Conservation Monitoring Centre. It is available from NOAA's National Geophysical Data Center. (NOTE: maps and GIS files may differ. To make sure you are using the most current ecoregion data, download shapefiles of ecoregions) GIS data (shapefiles, metadata and symbology): Clickable map of Level III and IV Ecoregions by state: Access to Level III and IV maps, GIS data, and descriptive information can be obtained by clicking on any. Select a state for descriptive information about that state's Level III and IV ecoregions. Additionally, each state section contains links to downloadable maps in PDF format, and files containing GIS datasets (shapefiles, metadata, and symbology data).
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