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This map layer shows Omernik's Level III ecoregions, derived from a 1:7,500,000 map created by J.M. Omernik in 1987 and from refinements of Omernik's framework that were made for other projects. Ecoregions describe areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. Omernik's ecoregions are based on the premise that a hierarchy of ecological regions can be identified through the analysis of the patterns and the composition of both living and nonliving phenomena, such as geology, physiography, vegetation, climate, soils, land use, wildlife, and hydrology, that affect or reflect differences in ecosystem quality and integrity. All the characteristics are considered...
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A map service on the www depicting ecological section boundaries within the conterminous United States. The map service contains regional geographic delineations for analysis of ecological relationships across ecological units. http://fsgeodata.fs.fed.us/clearinghouse/other_resources/ecosubregions.html. Baseline map of the ecological boundaries. Ecological analysis of resource distribution patterns and associations among different ecological land units.
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Number of globally threatened animals, by terrestrial ecoregion. We compiled a vertebrate species list for each ecoregion from WWF’s WildFinder database (WWF 2006). This list was then compared against the IUCN Red List of Threatened Species (2008) to determine the number of species per ecoregion that are threatened. Threatened species are those listed by IUCN Red List as Vulnerable, Endangered, or Critically Endangered (www.redlist.org). These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from: World Wildlife Fund (WWF). 2006....
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Number of amphibian species, by freshwater ecoregion. We calculated the number of amphibian species per freshwater ecoregion using species range maps of the Global Amphibian Assessment (GAA, www.iucnredlist.org/amphibians) (IUCN et al. 2006). The 2006 GAA assessed 5,918 amphibian species and provided distribution maps for 5,640 of those species. When a range overlapped several ecoregions, we counted species as present in all those ecoregions that had part of the range. This may have resulted in an overestimate of species numbers in some ecoregions, especially those that are long and narrow in shape. This is particularly true for the Amazonas High Andes ecoregion (312), where the mountain range has been used as...
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This dataset depicts the Level I ecological regions of North America, as compiled by the Commission for Environmental Cooperation (CEC). These draft files of of Level I, II, and III ecological regions of North America are an update and revision of files developed by Canada, the United States, and Mexico in the late 1990's in a cooperative project for the Commission for Environmental Cooperation (CEC 1997). The CEC was created under the North American Agreement on Environmental Cooperation (NAAEC) to address regional environmental concerns, help prevent potential trade and environmental conflicts and promote the effective enforcement of environmental law. The Agreement complements the environmental provisions established...
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Dataset created by the Food and Agriculture Organization (FAO) to identify major global ecofloristic zones. It was used by the IPCC to categorize carbon stock estimates. Each of the 20 ecoregions are characterized by their temperature regime (tropical, subtropical, temperate, boreal, and polar) and their vegetation type (humid forest, dry forest, moist deciduous forest, shrubland, steppe, desert, etc.).
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Number of mammal species, by terrestrial ecoregion. We compiled data on terrestrial mammals by querying the WWF WildFinder database for species occurrences by ecoregion. The WWF WildFinder database is a spatially explicit online database of vertebrate species occurrences by ecoregion. These data were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas.
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This map layer is commonly called Bailey’s ecoregions and shows ecosystems of regional extent in the United States, Puerto Rico, and the U.S. Virgin Islands. Four levels of detail are included to show a hierarchy of ecosystems. The largest ecosystems are domains, which are groups of related climates and which are differentiated based on precipitation and temperature. Divisions represent the climates within domains and are differentiated based on precipitation levels and patterns as well as temperature. Divisions are subdivided into provinces, which are differentiated based on vegetation or other natural land covers. The finest level of detail is described by subregions, called sections, which are subdivisions of...
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WWF's Global 200 is a first attempt to identify a set of ecoregions whose conservation would achieve the goal of saving a broad diversity of the Earth's ecosystems. These ecoregions include those with exceptional levels of biodiversity, such as high species richness or endemism, or those with unusual ecological or evolutionary phenomena. Tropical rain forests deservedly garner much conservation attention, as they may contain half of the world's species. However, a comprehensive strategy for conserving global biodiversity must strive to include the other 50 percent of species and habitats, such that all species and the distinctive ecosystems that support them are conserved. Habitats like tropical dry forests, tundra,...
Land facets were created by combining 3 rasters: elevation (seven 600-m bands), soil orders (11 classes) and slope (3 breaks) to produce a 270-m resolution grid. 162 land facets were created, ranging in size from over 9 million hectares in the plateaus of the Columbia Plateau to less than 1,000 hectares in steep, high elevation habitats. These 162 facets were stratified by ecoregions to produce 794 ecofacets which underlie the spatial distribution of biodiversity and the region’s biological richness. Soil Order: Soil orders reflect both geology and time and are based largely on soil forming processes, including exposure to climatic factors and biological processes, as indicated by the presence or absence of major...
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This dataset depicts the Level III ecological regions of North America, as compiled by the Commission for Environmental Cooperation (CEC). These draft files of of Level I, II, and III ecological regions of North America are an update and revision of files developed by Canada, the United States, and Mexico in the late 1990's in a cooperative project for the Commission for Environmental Cooperation (CEC 1997). The CEC was created under the North American Agreement on Environmental Cooperation (NAAEC) to address regional environmental concerns, help prevent potential trade and environmental conflicts and promote the effective enforcement of environmental law. The Agreement complements the environmental provisions established...
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A regionalization that classifies the Northern Appalachian/Acadian Ecoregion into distinct areas of increasingly uniform ecological potentials. The Biophysical Area types are mapped based on associations of those biotic and environmental factors that directly affect or indirectly express energy, moisture, and nutrient gradients which regulate the structure and function of ecosystems. These factors include climate, physiography, water, soils, air, hydrology, and potential natural communities.
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This summary of the Protected Areas Database of the United States (PAD-US) is created to provide land managers and decision makers with a general summary of management for conservation, natural resource management and recreation. Area statistics include total acreage, acres by managing agency and percent protection. These summaries are available for the nation and by state. The PAD-US 1.4 Combined feature class (with Marine Protected Areas removed) was modified to remove overlaps, avoiding overestimation in protected area statistic summaries. A Python scripted process prioritized overlapping designations (for example, Wilderness within a National Forest) based upon their relative biodiversity conservation (GAP Status...
Types: Citation; Tags: Acreage, Acres, Agricultural Research Service, Alabama (AL), Alaska (AK), All tags...
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Percent of ecoregion area covered with forest habitat. We derived the forest map from forest and woodland classes of the Global Land Cover 2000 data set (JRC 2003) with areas of human habitation and infrastructure from the Global Rural-Urban Mapping Project database (CIESIN et al. 2004) removed. We applied a zonal sum procedure to those data to show the amount of forest by ecoregion. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from: Center for International Earth Science Information Network (CIESIN), International Food...
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Oregon Ecoregions, developed and released by Oregon Biodiversity Information Center (ORBIC), March 2010. Based on US EPA Level III Ecoregions, with an additional Marine/Estuary Ecoregion that includes major estuaries and the oceanic nearshore and continental shelf. Oregon Ecoregions modify the US EPA Level III Ecoregions and are clipped to jurisdictional borders of Oregon. In the Coast Range and Marine/Estuary ecoregions, water/land interfaces, including coastal and riverine islands, and marine and estuarine waters, are presented in much greater detail than the delineations in the EPA shapefile. [from the original EPA Level III Ecoregion metadata]: The Level III EPA Ecoregions have been derived from Omernik (1987)...
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Human population density in 2000, by terrestrial ecoregion. We summarized human population density by ecoregion using the Gridded Population of the World database and projections for 2015 (CIESIN et al. 2005). The mean for each ecoregion was extracted using a zonal statistics algorithm. These data were derived by The Nature Conservancy, and were displayed in a map published in The Atlas of Global Conservation (Hoekstra et al., University of California Press, 2010). More information at http://nature.org/atlas. Data derived from: Center for International Earth Science Information Network (CIESIN), Columbia University; and Centro Internacional de Agricultura Tropical (CIAT). 2005. Gridded Population of the World...
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Percent of ecoregion area covered with desert and aridland habitat. We derived the aridlands map by first developing a raster-based mask of arid climates from the Köppen-Geiger climate classification (Kottek et al. 2006) using ArcInfo GIS software. We applied the mask to the GLC 2000 global land cover, and then extracted sparse vegetation classes. For example, pockets of forested land occurring within Köppen-Geiger arid climate regions were excluded. Areas of human habitation and infrastructure were also removed from the map, leaving only natural desert lands. Finally, we applied a zonal sum procedure to the raster map to calculate the percentage of arid land per ecoregion. These data were derived by The Nature...
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Number of migratory fish species, by freshwater ecoregion. We derived the map of long-distance migrant (LDM) fish—the number of LDM species per ecoregion—from published literature, online databases (NatureServe), and expert inquiries. Potadromous, anadromous, amphidromous, and catadromous fish species were judged to be LDMs if they made regular journeys (i.e., for breeding, dispersal, feeding) of at least a hundred kilometers or more in freshwater. These species were then assigned to ecoregions based on the fish species lists database from Abell et al. (2008). Although we used many resources, two key data sources for the map were the following: Carolsfeld, J., B. Harvey, C. Ross, and A. Baer, eds. 2003. Migratory...


map background search result map search result map Omernik's Level III Ecoregions of the Continental United States Bailey’s Ecoregions and Subregions of the United States, Puerto Rico, and the U.S. Virgin Islands Northern Appalachian Ecoregion - Ecological Subregionas US Forest Service Ecological Sections Oregon Ecoregions, 2010 Population Density, 2000, by Terrestrial Ecoregion Percent Forest Area by Terrestrial Ecoregion Percent Aridland Area by Terrestrial Ecoregion Number of Mammal Species by Terrestrial Ecoregion Number of Globally Threatened Animals by Terrestrial Ecoregion Number of Migratory Fish Species by Freshwater Ecoregion Number of Amphibian Species by Freshwater Ecoregion Global ecofloristic zones mapped by the United Nations Food and Agricultural Organization Commission for Environmental Cooperation (CEC) Ecological Regions of North America - Level III Commission for Environmental Cooperation (CEC) Ecological Regions of North America - Level I World Wildlife Fund - Global 200 (terrestrial) Ecoregions Oregon Ecoregions, 2010 Northern Appalachian Ecoregion - Ecological Subregionas US Forest Service Ecological Sections Bailey’s Ecoregions and Subregions of the United States, Puerto Rico, and the U.S. Virgin Islands Omernik's Level III Ecoregions of the Continental United States Commission for Environmental Cooperation (CEC) Ecological Regions of North America - Level III Commission for Environmental Cooperation (CEC) Ecological Regions of North America - Level I World Wildlife Fund - Global 200 (terrestrial) Ecoregions Population Density, 2000, by Terrestrial Ecoregion Percent Forest Area by Terrestrial Ecoregion Percent Aridland Area by Terrestrial Ecoregion Number of Mammal Species by Terrestrial Ecoregion Number of Globally Threatened Animals by Terrestrial Ecoregion Number of Migratory Fish Species by Freshwater Ecoregion Number of Amphibian Species by Freshwater Ecoregion Global ecofloristic zones mapped by the United Nations Food and Agricultural Organization