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Ecology Sections 123
| Term | Definition |
|---|---|
| Ecology | Study of all the interactions among organisms and their environment. |
| Abiotic Factors | Any non-living thing of the environment like water, sunlight, temperature, and air. |
| Biotic Factor | Any living part of organisms in the environment. |
| Population | All of the individuals of one species that live in the same space at the same time. |
| Community | All of the populations of different species in a given area that interact in the same way and depend on one another for food, shelter, and other needs. |
| Ecosystem | All of the communities in a given area and the aboitic factors that affect them. |
| Biosphere | Part of Earth that supports life-The top part of the Earth's crust, all the waters covering Earth's surface, and the surrounding atmosphere; includes all biomes, ecosystems, communities, and populations. |
| Population Density | Number of individuals in a population that occupies an area of limited size. |
| Limiting Factor | Any biotic or abiotic factor that limits the number of individulas in a population. |
| Symbiosis | Any close interactions among two or more different species, including mutualism, commensalism, and parasites. |
| Niches | Role of an organism in the ecosystem, including what it eats, how it interacts with other organisms, an how it gets food. |
| Habitat | Place where an organism lives. |
| Food Chain | Model that describes how energy passes from one organism to another. |
| Food Web | Model that describes how energy from food moves through a community; a series of overlapping food chains. |
| Water Cycle | Continuous cycle of water molecules on Earth as they rise into the atmosphere, fall back to Earth as rain or other precipitation and flowing into rivers and oceans through the process of evaporation, condensation, and precipitation. |
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