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Definition
| the place where an organism usually lives |
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| In ecology, a niche is a term describing the relational position of a species or population in an ecosystem. |
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| the exclusion of one species by another due to competition |
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| species that occupy similar niches in different geographical regions |
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Definition
| the relationship between two species (or individuals) in which both species (or individuals) attempt to use the same limited resource such that both are negatively affected by the relationship |
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| an interaction between two species in which one species, the predator, feeds on the other species, the prey |
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Definition
| a relationship in which two different organisms live in close association with each other |
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Definition
| a relationship between two species in which both species benefit |
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Definition
| a relationship between two organisms in which one organism benefits and the other is unaffected |
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Definition
| a relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed |
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Definition
| the number of individuals of the same species that live in a given unit of area |
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Definition
| The spatial distribution at any particular moment of the individuals of a species of plant or animal. |
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Definition
| A survivorship curve is a graph showing the number or proportion of individuals surviving at each age for a given species or group |
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Definition
| the movement of an individual or a group to a new community or region |
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Definition
| the movement of an individual or group out of its native area |
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Definition
| logarithmic growth, or growth in which numbers increase by a certain factor in each successive time period |
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Definition
| population growth that starts with a minimum number of individuals and reaches a maximum depending on the carrying capacity of the region; described by an S-shaped curve |
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Definition
| the largest population that an environment can support at any given time |
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Definition
| A sudden population decline caused by predation, waste accumulation, or resource depletion |
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Definition
| an environmental factor that prevents an organism or population from reaching its full potential of distribution or activity |
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Definition
| a variable affected by the number of organisms present in a given area |
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| density-independent factor |
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Definition
| a variable that affects a population regardless of the population density, such as climate |
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Definition
| the replacement of one type of community by another at a single location over a period of time |
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Definition
| succession that begins in an area that previously did not support life |
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Definition
| a species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established |
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Term
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Definition
| the process by which one community replaces another community that has been partially or totally destroyed |
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