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21.2
Auquatic Ecosystems
| Question | Answer |
|---|---|
| aphotic zone | zone where sunlight cannot penetrate and photosynthesis cannot occur |
| photic zone | the part of the ocean that receives sunlight |
| intertidal zone | the area of shoreline that is twice daily covered by water during high tide and exposed to air during low tide |
| neritic zone | extends from the intertidal zone over the continental shelf and to relatively shallow water depths of about 180 meters |
| oceanic zone | beyond the continental shelf, the deep water of the open sea |
| pelagic zone | the open ocean |
| benthic zone | the ocean bottom |
| plankton | communities of small organisms that drift with the ocean currents |
| estuary | occurs where freshwater rivers and streams flow into the sea |
| eutrophic lake | rich in organic matter and vegetation, so the waterws are relatively murky |
| oligotrophic lake | contain little organic matter, the water is much clearer, and the bottom is usually sandy or rocky |
| freshwater wetland | areas of land that are covered with fresh water for at least part of each year |
Created by:
blehrner
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