Narrower topics:

Coasts Coral Reefs Deserts Estuaries

Freshwater Marine Watersheds Wetlands

A C E G H I L N T U

A:
Atmospheric Radiation Measurement Program (ARM) - DOE Climate Research Facility - Includes the study of alterations in climate, land productivity, oceans or other water resources, atmospheric chemistry, and ecological systems that may alter the capacity of the Earth to sustain life [U.S. Department of Energy (DOE)]

C:
CSCOR: Center for Sponsored Coastal Ocean Research - Understanding and predicting the impacts of natural and anthropogenic influences on coastal regional ecosystems, communities, and economies. [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA)]

Collection FPC: Records of the Fish Passage Center, 1984 - 2005 - National Archives' Archival Research Catalog description for Collection FPC: Records of the Fish Passage Center, 1984 - 2005 [U.S. National Archives and Records Administration (NARA)]

E:
Earth Day: Selected Resources - Science Reference Guide - Finding guide from the Library of Congress, Science Reference Section [U.S. Library of Congress (LOC)]

G:
Global Warming & Climate Change: Science Tracer Bullet - updated Feb. 2011 - Finding guide from the Library of Congress, Science Reference Service [U.S. Library of Congress (LOC)]

H:
Hope for Animals and Their Worlds - Webcast: Jane Goodall's presentation on her book, Hope for Animals and Their Worlds: How Endangered Animals are Being Rescued from the Brink. [U.S. Library of Congress (LOC)]

I:
International Institute of Tropical Forestry (IITF) - Research on the sustainable use of forest resources, the rehabilitation of degraded lands, and the management and conservation of tropical forests, wildlife and watersheds [U.S. Department of Agriculture (USDA), Forest Service]

L:
Laws and Policies - Office of Protected Resources - NOAA Fisheries - Mandates for the protection of endangered and threatened marine life, marine mammals, and the ecosystems upon which they depend. [U.S. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA)]

N:
North American Breeding Bird Atlas Explorer - Bird breeding survey maps and information for the US and Canada. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Patuxent Wildlife Research Center]

T:
The Cheetah: A Race for Survival. Webcast - A Webcast of a presentation by Dr. Laurie Marker. She is the Founder and Executive Director of the Cheetah Conservation Fund, headquartered in the Republic of Namibia. [U.S. Library of Congress (LOC)]

The Nature and Science of Autumn: Science Reference Guide - A research and finding aid from the Science Reference Service at the Library of Congress [U.S. Library of Congress (LOC)]

Trinity River National Wildlife Refuge - Information about the protection of a remnant of the bottomland hardwood forest ecosystem along the Trinity River. [U.S. Department of the Interior (DOI), U.S. Fish and Wildlife Service]

U:
USGS Biocomplexity Thesaurus - A collection of biodiversity terms and their relationships, in the areas of Aquatic Sciences and Fisheries, Life Sciences, Pollution, Sociology, Ecotourism , and Fire Science. [U.S. Department of the Interior (DOI), U.S. Geological Survey (USGS), Core Science Analytics & Synthesis Program]