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Definition
| group of intercting populations that live in the same geographic area at the same time |
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| biotic or abiotic factor that restricts the number, distribution, or reproduction of a population within the community |
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| organism's ability to survive biotic and abiotic factors, as the body becomes less responsive to a drug, an individual needs larger and more frequent doses to achieve the same affect |
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Definition
| process by which one community replaces another community because of changing biotic and abiotic factors |
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| establishment of a community in an area of bare rock or bare sand, where no topsoil is present |
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Definition
| orderly change that occurs in a place where soil remains after a community of organisms has been removed |
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Definition
| average weather conditions in a specific area, determined by latitude, elevation, ocean currents, other factors |
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Definition
| treeless biome with permanently frozen soil under the surface and average yearly precipitation of 15-25 cm |
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| biome south of the tundra with dense evergreen forests and long, cold, dry winters |
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| biome characterized by small trees and mixed shrub communities |
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Definition
| material deposited by water, wind, or glaciers |
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Definition
| areas on lake or pond closest to shore |
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Definition
| well-lit, open water area of a lake or pond |
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| tiny marine of freshwater photosynthetic, free floating autotrophs that serve as a food source for many fish species |
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Definition
| deepest, coldest area of a large lake with little light and limited biodiversity |
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Definition
| water-saturated land area that supports aquatic plants |
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Definition
| unique, transitional ecosystem that supports diverse species and is formed where freshwater and ocean water merge |
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Definition
| narrow band of shoreline where the ocean and the land meet that is alternately submerged and exposed and is home to constantly changing communities |
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Definition
| open ocean zone shallow enough for sunlight to penetrate |
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| open ocean zone through which sunlight cannot penetrate |
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| ocean floor area consisting of sand, silt, and dead organisms |
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Definition
| deepest, very cold region of the open ocean |
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| stable, mature ecological community with little change in the composition of species |
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Definition
| atmospheric conditions such as temperature and precipitation at a specific place and time |
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| distance of a point on Earth's surface north or south of the equator |
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