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.
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.
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.
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.
MBGnet - Descriptions and images of the biomes of the world, freshwater ecosystems, and marine ecosystems. From the Missouri Botanical Garden.
Millennium Ecosystem Assessment - Reports from international effort to inventory global ecosystems, their contribution to human development, and the effect of the ongoing degradation of ecosystem services on human well-being.
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.