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Aquatic Ecosystems
21-2
| term | definition |
|---|---|
| aphotic zone | cold and dark, area of ocean where sunlight cannot penetrate and photosynthesis cannot occur |
| photic zone | receives sunlight, depth varies according to sunlight. Because water absorbs light, sunlight penetrates only the upper few hundred meters. |
| intertidal zone | area of shoreline that is twice daily covered by water during high tide and exposed to air during low tide. |
| neritic zone | extends from intertidal zone over the continental shelf and to relatively shallow water depths of about 180 m |
| oceanic zone | deep water of the open sea, beyond continental shelf. divided into 2 parts-- |
| pelagic zone | open oceanic zone |
| benthic zone | ocean bottom |
| plankton | communities of small organisms that drift with the ocean currents, consumed by larger animals like turtles |
| estruary | where freshwater rivers and streams flow into the sea |
| eutrophic lake | rich in organic matter and vegetation, relatively murky waters. |
| oligotrophic lake | contain little organic matter, sandy/ rocky bottoms, clear waters |
| freshwater wetland | areas of land that are covered with fresh water for at least part of each year. main types are marshes and swamps. most productive freshwater ecosystem. |
Created by:
farlowm16
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