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Pokegama Bay contains extensive forested wetlands, uplands, clay flats and submerged lands.
Courtesy of NOAA.

Ecosystems are composed of all interacting organisms (biota) along with their physical and chemical environments. Physical aspects of an ecosystem, called abiotic components, include variables related to temperature, sunlight, soil, and other factors.

Companion slide set to the video, "Ecosystems."


Author(s): Deanne Erdmann MS
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Aquatic Ecosystems

Zonation in Lakes

Zonation in a Marine Environment

Primary Production in Plants

Water Cycle

Carbon Cycle

Ecological Importance of Fungi

The Kingdom Plantae

Major Groups of Plants

Comparing Groups of Microbes