Ecology

Shades of Green
This entrant to the ThinkQuest competition introduces the user to the world's forests. Topics include forest types, forest life, importance of forests, threats to forests, and forests through time. The site also contains an interactive forest walk where users can stop and explore various aspects of a temperate forest.

Great Lakes Information Network (GLIN)
This is a tremendous resource for anyone interested in ecological issues involving the Great Lakes of North America. (The five Great Lakes comprise one-fifth of the world's fresh surface water supply and nine-tenths of that of the U.S.) GLIN is a partnership of a number of organizations interested in maintaining the quality of the Great Lakes and provides this web site to further that end. Most of the material on the site consists of well-annotated links to other sites that pertain to the Great Lakes. Links are arranged by topic and include ecosystems, environment, education, and economy. Another similar and complementary site is the Great Lakes Ecopage maintained by the U.S. Environmental Protection Agency. This site has specific information about quality of and pollution in the lakes and a great archive of images of the Great Lakes.

Checklist of Online Vegetation and Plant Distribution Maps
This is a directory of online vegetation maps with maps arranged geographically.

Epidemic! The World of Infectious Disease
This site is an accompaniment to an exhibition by the American Museum of Natural History developed in 1999. It is essentially an annotated slideshow and does a good job of introducing the science of studying epidemics. Topics covered include the processes of infection and outbreak, the role of environmental change and a general discussion of infectious agents.

TreeGuide: The Natural History of Trees
This site contains a variety of information relating to the natural history of trees including a database that can be searched by species' common or scientific name, information on tree biology (e.g., taxonomy), "tree superlatives" (oldest tress, biggest tree, etc.), and a forum for posting information and questions about trees.