| Term | Definition |
|---|
| Plankton | organisms that float near the surface of water |
| nekton | are free swimming organisms like fish, tutles and whales |
| benthos | are bottom dwelling organisms such as mussels, worms and barnacles |
| littoral zone | a nutrient rich zone of water near the shore which has abundant and diversed aquatic life |
| benthic zone | the bottom of a pond or lake which is inhabited by decomposers, insect larvae and clams |
| Eutrophication | is an increase in the amount of nutrients in an aquatic ecosystem |
| estuary | an area in which fresh water from a river mixes with salt water from the ocean |
| salt marshes | are developed in estuaries where rivers deposits their load of mineral rich mud |
| mangrove swamps | swamps that are located along coastal areas of tropical and subtropical zones |
| barrier islands | are islands that run parallel to the shore |
| coral reefs | are limestone ridges build by tiny coral animals call coral polyps |
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