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 Nation
   http://www.esd.ornl.gov/programs/bioindicators/

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/

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

Potholes and Vernal Pools as Potential Indicator Systems
   A technical article by Tim B. Graham about climate change and ephemeral pool ecosystems, with photographs.
   http://geochange.er.usgs.gov/sw/impacts/biology/vernal/

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/

The BioSub Project
   A scientist tries living underwater in an Australian lake, using a self-sustaining habitat. Includes video feed, photograph gallery and latest news.
   http://biosub.com.au/