WorldBiomes Covering five of the major world biomes. http://www.worldbiomes.com/

Biodiversity and Mutualism in Ecosystems Technical paper on the importance of biodiversity and mutualism (co-operation between different species) to ecosystem function and structural organization. http://angelfire.com/sk/monkeypuzzle/mbiooverviewmain.html

The Buell-Small Succession Study A long term old-field permanent-plot ecological succession study on the New Jersey Piedmont. http://www.ecostudies.org/bss/

Biomes - Living Worlds Fact sheets, photos, and video clips on the climate, location, animal and plant adaptations, land formations, and human influences of seven major terrestrial biomes: tundra, taiga, temperate forest, grassland, chaparral, desert, and rainforest. http://library.thinkquest.org/C0113340

The World's Biomes Introduction to aquatic, desert, forest, grassland, and tundra biomes. School class project. http://www.ucmp.berkeley.edu/glossary/gloss5/biome/

Terrestrial Ecoregions of the World Maps, descriptions, and index to 687 ecoregions across the globe. Javascript required. http://www.nationalgeographic.com/wildworld/terrestrial.html

World Wildlife Fund - Ecoregions Detailed descriptions and images of the world's ecoregions. Javascript required. http://www.worldwildlife.org/ecoregions/

Images of the Dry Tropics Photographs of plants, animals, and landscapes from dry tropical habitats in the Americas, Africa, Madagascar, and Asia. Dry tropical habitat types include tropical dry forest, tropical deciduous forest, thorn forest, spiny desert, savannah, cerrado, and caatinga. http://www.explorelifeonearth.org/drytropics.html

The State of the Nation's Ecosystems Online book about the current status and trends of the environment of the United States, aimed at public policy makers and concerned citizens. http://www.heinzctr.org/ecosystems/

Ecological Society of America Panel on Vegetation Classification Constituted by the Ecological Society of America to support and facilitate the creation of standardized, scientifically credible North American vegetation type classification. http://www.esa.org/vegweb/

Len Webb Ecological Images Collection Photographs by ecologist Len Webb depict a wide variety of native vegetation, fauna, landscapes, and soils, mainly in tropical and subtropical Northeastern Australia. Represents a wide range of ecosystem types. http://www.gu.edu.au/ins/collections/webb/

Millennium Assessment of Global Ecosystems International project and process designed to improve the management of ecosystems and their contribution to human development by helping to bring the best available information on ecosystem goods and services to bear on policy and management decisions. http://www.millenniumassessment.org/

A Mysterious Journey - Rainforest, Desert, Grassland Educational site about the 3 major biomes of the world, rainforest, desert and grassland. http://www.thinkquest.org/library/site_sum.html?tname=26634&url=26634/

Ecosystem Information Information related to ecosystems in the Pacific and Yukon regions of Canada, including state of the environment reporting, environmental indicators, and programs and reports on ecosystem science, monitoring and research. http://www.ecoinfo.ec.gc.ca/

MBGnet Descriptions and images of the biomes of the world, freshwater ecosystems, and marine ecosystems. From the Missouri Botanical Garden. http://mbgnet.mobot.org/

Oakleaf Systems Simulations of data based upon relationships presented in the journal Ecology, with 25 different simulations for each journal volume. http://www.oakleafsystems.net/