• Ask-USGS
• USGS Ask-A-Geologist
• USGS Library
• USGS Maps on Demand
• USGS Water Resources Technical Resources
• Berkeley Digital Library
• Compendium of Pesticide Common Names
• Ecotox Database System (EPA)
• Envirofacts (USEPA Data Warehouse and Applications)
• EnviroLink Network
• Environmental Contaminants Encyclopedia (National Park Service)
• Environmental Fate DataBase
• Federal Register Environmental Documents
• John R. Borchert Map Library (University of Minnesota)
• National Library for the Environment
• Organic Chemistry Forum
• Periodic Table
• The Virtual Library Portal
• Unit Conversion, Weights and Measures
• Water Librarians Homepage
• WWW Virtual Library - Ecology and Biodiversity

• USGS Search
• Biological Inventories of the World's Protected Areas
• Environmental Education on the Internet
• Government Information Locator
• Integrated Taxonomic Information System
• Internet Resource Guide for Zoology
• Scorecard (U.S. pollution information with detailed search capability)
• Socioeconomic Data and Applications Center (SEDAC)
• USEPA Search the EPA Internet

• USGS-BRD National Biological Information Infrastructure (NBII)
• American Environmental Photographs (Library of Congress 1891-1936)
• American Fisheries Society (AFS)
• American Institute of Biological Sciences
• American Rivers
• American Society for Testing and Materials (ASTM)
• American Society of Ichthyologists and Herpetologists
• American Society of Limnology and Oceanography
• America's Wetlands (USEPA)
• Aquatic Network
• Center for Aquatic and Invasive Plants (University of Florida)
• Center for Biological Diversity
• Contaminated Sediments Web References
• Ecological Risk Analysis
• Ecological Risk Assessments (EPA)
• Ecological Society of America
• Ecology (Yahoo Science)
• Ecosystem Valuation
• EcoWorld
• Endocrine Disruptors Research (USEPA)
• Freshwater Web Site (Environment Canada)
• Geological Society of America
• Global Warming (The Warming of the Earth--Wood's Hole Research Center)
• Marine Debris (EPA)
• Marine Debris Program (NOAA)
• Millennium Ecosystem Assessment
• National Wetlands Inventory (USFWS)
• Native Americans and the Environment
• Oceans in Peril (Smithsonian Institute)
• Phytoremediation
• Rachel Carson - The Life and Legacy
• Society of Environmental Toxicology and Chemistry (SETAC)
• State of the Land - The NRCS Map Room (USDA)
• Tree of Life
• WetNet (Texas Wetland Information Network)
• Water Environment Federation

• Amphibian Species of the World
• BIRDNET (Ornithological Council)
• Science and Technology (Smithsonian Institute)
• eNature (online searchable field guides to over 5,500 plant and animal species)
• Endangered Species Program (USFWS)
• Entomology Image Gallery (Iowa State University)
• Fish Index
• Fish of Minnesota
• Fish of the Great Lakes
• Freshwater Benthic Macroinvertebrates
• Identifying Aquatic Insects
• Inland Fishes of New York State (Cornell University)
• Herps of Texas (Amphibians and Reptiles) (University Texas-Austin)
• Ichthyology (Texas Natural History Collections)
• Medaka Developmental Stages
• Photographic Library
• Plankton (image gallery and 3D)
• Reptile Database
• Saltwater Fish Identification
• Species 2000 (Indexing the World's Known Species)
• The Fish Out of Time - Coelacanth

Microscopy

• BIODIDAC (databank of digital images)
• Cell Biology
• Embryonic Zoo (Virtual Embryo)
• Microbe Zoo
• Microscopy Resources
• Protist Image Data (Picture Gallery)
• Scanning Electron Microscope (+ Image Gallery) (Boston Museum of Science)
• Virtual Cell
• Web Atlas for Cellular Structures (Using Light and Confocal Microscopy)

Watersheds   

• Center for Integrated Watershed Science and Management (UC-Davis)
• Chesapeake Bay Program: A Watershed Partnership
• Interactive Watersheds
• Internet Watershed Educational Tool
• Missouri River Communities Network
• Missouri's Watersheds
• Missouri Watershed Information Network (MoWIN)
• Stream Corridor Restoration - Principles, Practices, and Processes (USDA)
• Surf Your Watershed (USEPA)
• Decision Support System for Non-Point Source Pollution Control (University of North Carolina)
• Watershed Education and Training Program (NOAA)
• Watershed Education Links
• Watershed Homepage (USEPA)
• Watershed Management Council
• Watershed Management in the Southwest

Geographic Information Systems (GIS) and Global Positioning Systems (GPS)

• CERC Community Base Station in Columbia, MO
• USGS-BRD GIS Related Information Servers
• USGS-BRD GPS Related Information Servers
• USGS National Geospatial Program
• USGS National Spatial Data Clearinghouse
• USGS United States/Mexico Transboundary Mapping and GIS Initiative
• AI-Geostats (Spatial Statistics and Geostatistics)
• Biotelemetry Resources
• Digital Elevation Data Catalogue
• Center for Advanced Spatial Technologies University of Arkansas, Fayetteville
• GIS and Remote Sensing (Michigan State University)
• GIS Tools (Stanford)
• GPS Applications Exchange (NASA)
• Global Positioning System Overview 
• Federal Geographic Data Committee
• Online Map Creation
• Society for Conservation GIS
• GIS Datasets (Stanford)

Real-Time Hydrographs and Weather Reports

• USGS Real-Time Water Data
• Missouri River Region - Water Management Information US Army Corps of Engineers
• Missouri Basin River Forecast Center National Weather Service (NOAA)
• National Water and Climate Center (USDA)

Miscellaneous

• Desert Life in the American Southwest
• DNA Learning Center
• Environmental Jobs and Careers (eJobs.org)
• eSkeletons Project (UT-Austin)
• Essays on Science and Society (AAAS)
• Missouri Botanical Garden
• Molecule of the Month
• NASA Homepage
• NASA for Kids
• NASA's Global Change Master Directory
• National Science Foundation
• NetBiochem (online Biochemistry tutorial)
• RasMol (free software for looking at molecular structures)
• Snow Crystal Research (electron microscope images of snow flakes)
• The Exploratorium - Museum of Science, Art and Human Perception

Any links you'd like to add? Find any broken links? email Marcia K Nelson

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U.S. Department of the Interior | U.S. Geological Survey URL: http://www.cerc.usgs.gov/links/links.htm Web Contact Information: Marcia K Nelson and Chris Henke Last Modified: