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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 a Marine Environment

Carbon Cycle

The Kingdom Monera - Archaebacteria

Why Do Skeletal Muscle Fibers Atrophy During Space Flight?

Climate Change Affects Health

What is a Tsunami?

Tsunami Size and Speed

Tsunami Warnings