tolerance limits
Minimum and maximum limits for physical conditions (such as temperature) and concentrations of chemical substances beyond which no members of a particular species can survive. See law of tolerance.
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Chapter 8 - Community Ecology: Structure, Species Interactions, Succession, and Sustainability
theory of island biogeography
The number of species found on an island is determined by a balance between two factors: the (1) immigration rate (of species new to the island) from other inhabited areas and (2) extinction rate (of species established on the island). The model predicts that at some point the rates of immigration and extinction will reach an equilibrium point that determines the island's average number of different species (species diversity).
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territoriality
Process in which organisms patrol or mark an area around their home, nesting, or major feeding site and defend it against members of their own species.
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symbiotic relationship
Species interaction in which two kinds of organisms live together in an intimate association. Members of the participating species may be harmed by, benefit from, or be unaffected by the interaction. See commensalism, interspecific competition, mutualism, parasitism, predation.
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symbiosis
Any intimate relationship or association between members of two or more species. See symbiotic relationship.
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succession
See ecological succession, primary succession, secondary succession.
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stability
Ability of a living system to withstand or recover from externally imposed changes or stresses. See constancy, inertia, resilience.
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species equilibrium model
See theory of island biogeography.
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species diversity
Number of different species and their relative abundances in a given area. See biodiversity. Compare ecological diversity, genetic diversity.
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soil
Complex mixture of inorganic minerals (clay, silt, pebbles, and sand), decaying organic matter, water, air, and living organisms.
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