Ecoregion - Wikipedia
An ecoregion (ecological region) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of land or water, and contain characteristic, geographically distinct assemblages of natural communities and species.
Ecoregions | U.S. Geological Survey - USGS.gov
2019年10月19日 · Ecoregions have been developed and are being used to study the place dependency of environmental processes, including anthropogenic transformations of the land surface. Ecoregions are also the basis for reporting on the status and trends of land cover and land cover change.
15: Ecoregions - Biology LibreTexts
2021年9月10日 · An ecoregion is "a relatively large unit of land or water containing a geographically distinct assemblage of species, natural communities, and environmental conditions" (WWF, 1999); thus, the ecosystems within an ecoregion have certain distinct characters in common (Bailey, 1998a).
Ecoregions | US EPA
2024年10月1日 · Ecoregions are identified by analyzing the patterns and composition of biotic and abiotic phenomena that affect or reflect differences in ecosystem quality and integrity (Omernik 1987, 1995). These phenomena include geology, landforms, soils, vegetation, climate, land use, wildlife, and hydrology.
Ecoregions - National Wildlife Federation
Ecoregions are areas that have similar climate, geology, and soils. These abiotic (non-biological) factors determine what plants and animals can live in the ecosystem. Even though two places might be far apart, if they are part of the same ecoregion, we …
Level III and IV Ecoregions by State | US EPA
2024年1月2日 · Information and links to downloadable maps and datasets for Level III and IV ecoregions, listed by state. Ecoregions are areas of general similarity in the type, quality, and quantity of environmental resources.
Terrestrial Ecoregions of the World | Publications | WWF
Terrestrial Ecoregions of the World (TEOW) is a biogeographic regionalization of the Earth's terrestrial biodiversity. Our biogeographic units are ecoregions, which are defined as relatively large units of land or water containing a distinct assemblage of natural communities sharing a large majority of species, dynamics, and environmental ...
List of ecoregions in the United States (EPA) - Wikipedia
This list of ecoregions in the United States provides an overview of United States ecoregions designated by the U.S. Environmental Protection Agency (EPA) and the Commission for Environmental Cooperation (CEC).
Ecoregions of North America | US EPA
2024年6月27日 · North America has been divided into 15 broad, level I ecological regions. These highlight major ecological areas and provide the broad backdrop to the ecological mosaic of the continent, putting it in context at global or intercontinental scales.
Ecological regions (ecoregions) | SpringerLink
For the sake of brevity, an ecoregion is defined herein as a land area that varies in size from a few hectares to thousands of square kilometers and has a unified climate, geology, topography, soil, potential natural vegetation, and predominant land use (for examples, see Figures E7–9).