Bioindicators of Aquatic Ecosystem Stress Biological indicators have been developed and applied at field sites in the eastern U.S. to assess the effects that environmental stressors such as contaminants have on the health of aquatic organisms. (Environmental Sciences Division at Oak Ridge National Laboratory.) http://www.esd.ornl.gov/programs/bioindicators/

Aquatic Network Aquatic world information on aquaculture, conservation, education, fisheries, limnology, oceanography, ocean engineering, maritime heritage, and seafood. Online store. http://www.aquanet.com/

Canada's Aquatic Environments Featuring the habitats, animals, and plants of Canada's oceans, rivers, lakes, and wetlands. University of Guelph. http://www.aquatic.uoguelph.ca/

Aquatic Ecology Page Guide to aquatic life and ecology resources on the Internet, with sections on algae, plants, animals and aquatic ecosystems. http://www2.netdoor.com/~pinky/aquatic.htm

Potholes and vernal pools as potential indicator systems A technical article about climate change and ephemeral pool ecosystems, with photographs. http://geochange.er.usgs.gov/sw/impacts/biology/vernal/

Environment Canada: Aquatic ecosystems Part of the Fresh Water web site. http://www.ec.gc.ca/water/en/nature/aqua/e_aqua.htm

Biological Markers of Water Pollution A review of the literature on the use of enzyme induction in aquatic organisms to measure environmental pollution. http://www.brighton73.freeserve.co.uk/tomsplace/scientific/msc-thesis/mst-revi.htm

Research Group of Experimental Zooplankton Ecology A research group in Finland; studies on zooplankton, cyanobacteria, fish and blue mussels in the Baltic Sea -- staff, projects, publications. http://haavi.fimr.fi/ezeco/

Ecology Tutorial Short introduction to the science of ecology, including terminology. http://www.rpi.edu/dept/chem-eng/Biotech-Environ/ECOLOGY/Tutorial.html