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/

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/

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

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/

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/

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/