Baileys' Eco-Regions - a description of the eco-regions of the United States.

Ecological Subregions of the United States - this framework provides a standardized method for classifying, mapping, and describing ecological units at various geographic planning and analysis scales.

Ecosystem Modeling of Prince William Sound Alaska - University of British Columbia Fisheries Centre - understanding the ecosystem before and after the Valdez oil spill.

El Eden Ecological Reserve - An experimental protected area for research on biodiversity, conservation, natural resources management, sustainable development, and ecotourism in the Maya area.

EMDS - knowledge based decision support for ecological assessment.

Endangered Ecosystems of the United States: A Preliminary Assessment of Loss and Degradation - reports that looks at biodiversity loss, and recommends conservation plans to counter damage. From the U.S. Geological Survey.

Everglades Ecosystem, The - includes a look at the habitats, endangered species, animals, geology, threats and restoration efforts, and history of Everglades National Park.

Evergreen Project Adventures - on-line learning environment from the Missouri Botanical Garden teaching elementary students about biomes. Includes teacher resources and student activities.

Hudson Bay Project - ecosystem studies and conservation of coastal arctic tundra.

Live From Antarctica - Passport to Knowledge project designed to allow students and teachers the opportunity to experience what life is like in the coldest place on the planet.

Society for Range Management - professional scientific society and conservation organization concerned with studying, conserving, managing, and sustaining the varied resources of rangelands.

U.S. Army Garrison, Hawaii Ecosystem Management Program - for its training lands in the State of Hawaii.

USGS South Florida Ecosystem History Database - provides access to key information about biotic assemblages, field information, water conditions, and modern sea grass conditions within south Florida.

USGS South Florida Information Access (SOFIA) - provides an improved scientific information base to resolve or prevent complex resource conflicts or environmental problems in specific ecosystem sites.