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MB 21.2
MB Chapter 21, Section 2
| Term | Definition |
|---|---|
| aphotic zone | the deeper parts of the ocean, where there is so little light that plants cannot carry out photosynthesis |
| photic zone | the area of an aquatic system that receives enough light for photosynthesis to occur |
| intertidal zone | an area along ocean shorelines that lies between low and high water lines |
| neritic zone | a shallow marine environment that is near the shore or over the continental shelf and that is rich in minerals and nutrients produced by biotic activity |
| oceanic zone | the region of the open sea that has characteristic life-forms and geography |
| pelagic zone | the region of an ocean or body of fresh water above the benthic zone |
| benthic zone | the bottom region of oceans and bodies of fresh water |
| plankton | the mass of mostly microscopic organisms that float or drift freely in the waters of aquatic (freshwater and marine) environments |
| estuary | an area where fresh water from rivers mixes with salt water from the ocean; the part of a river where the tides meet the river current |
| eutrophic lake | lakes that are rich in organic matter and vegetation |
| oligotrophic lake | a lake that lacks plant nutrients and that has a lot of oxygen dissolved in its lower layer |
| freshwater wetland | areas of land that are covered with fresh water for at least part of each year |
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