Ecoregions | US EPA - U.S. Environmental Protection …
Oct 1, 2024 · 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 …
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). The CEC was established in 1994 by the member states of Canada, Mexico, and the United States to address regional environmental concerns under the North American Agreement on Environmental Cooperation (NAAEC), the environmental side ac…
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Ecoregions - National Wildlife Federation
By studying ecoregions, we begin to understand more about the history, ecology, and biodiversity of the United States. Conservationists use ecoregions to help in habitat protection and restoration projects and to produce recovery plans for …
Level III and IV Ecoregions of the Continental United …
Jun 27, 2024 · Information and downloadable maps and datasets for Level III and IV ecoregions of the continental United States. Ecoregions are areas of general similarity in the type, quality, and quantity of environmental resources.
List of ecoregions in the United States (WWF) - Wikipedia
260 rows · The United States is unique among countries in that its terrestrial ecoregions span three biogeographic realms: the Nearctic, Neotropical, and Oceanian realms. Alaska is the most biodiverse state with 15 ecoregions …
Ecoregions | Ecosystems Research - US EPA
Mar 27, 2018 · 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 …
Ecoregions | U.S. Geological Survey - USGS.gov
Oct 19, 2019 · Ecoregions have been developed and are being used to study the place dependency of environmental processes, including anthropogenic transformations of the land …
Description of the Ecoregions of the United States - US Forest …
Aug 22, 2008 · In 1993, as part of the Forest Service's National Hierarchical Framework of Ecological Units (ECOMAP 1993), ecoregions were adopted for use in ecosystem …
Ecological Subregions of the United States - US Forest Service
Oct 30, 1996 · This document contains the biophysical descriptions of the Sections as depicted on the map "Ecoregions and Subregions of the United States," dated June 1994. The basis for …
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