According to that quoted in http://www.bio.hw.ac.uk/edintox/enviro.htm (a cool site): Environmental toxicology and ecotoxicology are terms used to describe the scientific study of the adverse effects on living organisms that chemicals can have when released into the natural environment. There is a tendency to apply the term "environmental toxicology" only to the study of direct effects of environmental chemicals on human beings and the term "ecotoxicology" only to the study of the effects of chemicals on ecosystems and their nonhuman components.- Category ID : 417326
Provides ecotoxicology testing products and services. Describes the Lemna (duckweed) bioassay test for detecting and evaluating hazardous substances in ecosystems.
Researchers found an unidentified organohalogen contaminant in the eggs of Atlantic and Pacific Ocean seabirds. If a marine organism is the source, this would be the first instance of a naturally produced organohalogen accumulating in the eggs of wild birds.
U.S. EPA website includes a primer and FAQs on biological criteria and their application, guidelines on their use in aquatic ecosystems, case studies, and links/contacts for additional information.