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Chp. 19, 20, & 21
| Word | Definition |
|---|---|
| 1.) Population Density | the number of individuals of the same species that live in a given unit of area |
| 2.) Limiting Factors | an environmental factor that prevents an organism or population from reaching its full potential of distribution or activity |
| 3.) Carrying Capactiy | the largest population that an environment can support at any given time |
| 4.) Density Dependent Factors | a variable affected by the number of organisms present in a given area |
| 5.) Density Independent Factors | a variable that affects a population regardless of the population density, such as climate |
| 6.) Ecological Succession | a gradual process of change and replacement in a community |
| 7.) Primary Succession | succession that begins in an area that previously did not support life |
| 8.) Secondary Succession | the process by which one community replaces another community that has been partially or totally destroyed |
| 9.) Pioneer Species | a species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established |
| 10.) Climax Community | a final, stable community in equilibrium with the environment |
| 11.) Biome | a large region characterized by a specific type of climate and certain types of plant and animal communities |
| 12.) Permafrost | in arctic regions, the permanently frozen layer of soil or subsoil |
| 13.) Canopy | the layers of treetops that shade the forest floor |
| 14.) Epiphyte | a plant that uses another plant for support, but not for nourishment |
| 15.) Aphotic Zone | the deeper parts of the ocean, where there is so little light that plants cannot carry out photosynthesis |
| 16.) Photic Zone | the area of an aquatic system that receives enough light for photosynthesis to occur |
| 17.) 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 |
| 18.) Plankton | the mass of mostly microscopic organisms that float or drift freely in the waters of aquatic (freshwater and marine) environments |
| 19.) Eutrophic Lake | describes a lake or other body of water that contains a rich supply of plant nutrients |
| 20.) Oligotrophic Lake | a lake that lacks plant nutrients and that has a lot of oxygen dissolved in its lower layer |
| 21.) Freshwater Wetland | freshwater: water that contains insignificant amounts of salts, as in rivers and lakes wetland: an area of land that is periodically underwater or whose soil contains a great deal of moisture |
Created by:
sgcook123
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