CHAPTER 7
Order by
24 terms
Terms | Definitions |
|---|---|
 eutrophic lake | Lake with a large or excessive supply of plant nutrients, mostly nitrates and phosphates. |
| oligotrophic lake | A nutrient-poor, clear, deep lake with minimum phytoplankton. |
| salinity | the relative proportion of salt in a solution |
| intertidal zone | portion of the shoreline that lies between the high and low tide lines |
| estuary | the wide part of a river where it nears the sea |
| abyssal zone | the deep sea (2000 meters or more) where there is no light |
| bathyal zone | the steep descent of the seabed from the continental shelf to the abyssal zone |
| coral reef | a reef consisting of coral consolidated into limestone |
| phytoplankton | photosynthetic or plant constituent of plankton |
| mesotrophic | moderate amounts of nutrients, moderate phytoplankton productivity |
| inland wetlands | Lands covered with fresh water all or part of the time (excluding lakes, resercoirs, and streams) and located away from coastal areas |
| bentic zones | associated with ocean bottom |
| euphotic zone | Upper layer of a body of water through which sunlight can penetrate and support photosynthesis. |
| barrier island | a long narrow sandy island (wider than a reef) running parallel to the shore |
| zooplankton | animal constituent of plankton |
| cultural eutrofication | overnourishment of aquatic ecosystems with plant nutrients because of human activities such as agriculture, urbanization, and discharges from industrial plants and sewage treatment plants |
| nanoplankton | smaller recently discovered and poorly understood producers that are types of plankton that are smaller than 10 microns |
| flood plain zone | area of rivers which empty into the ocean |
| runoff | water that flows over the ground surface rather than soaking into the ground |
| aquatic life zone | Marine and freshwater portions of the biosphere. Examples include freshwater life zones (such as lakes and streams) and ocean or marine life zones (such as estuaries, coastlines, coral reefs, and the deep ocean). |
| source zone | Headwater or mountain highland streams of cold, clear water rush over waterfalls and rapids |
| transition zone | headwater merge from wider, deeper streams that flow down gentler slopes with fewer obstacles |
| watershed | a ridge of land that separates two adjacent river systems |
| coastal zone | Warm, nutrient-rich, shallow part of the ocean that extends from the high-tide mark on land to the edge of a shelflike extension of continental land masses known as the continental shelf. |
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