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13 Cards in this Set
- Front
- Back
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What is the individualistic hypothesis?
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Gleason - Species are found together because they have similar abiotic requirements, no distinct boundaries between communities
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What is the integrated hypothesis?
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Clements - Plant communities function as a real integrated unit, plants are found together because of their interactions with the ecosystem
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Is the individualistic or integrated hypothesis more correct?
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Individualistic
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What determines diversity?
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Richness and eveness
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What is relative abundance?
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It is the individuals of species divided by the total number of individuals in the community
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What are some abiotic factors that affect the abundance or different species in a community?
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Climate, soil, latitude, elevation, and disturbance
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What is tolerance range?
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Rand of conditions under which it can survive and reproduce
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What is a disturbance?
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It is a decrease or total elimination of the biotic components of the habitat
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What is the theory of competitive exclusion?
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When two species compete for the same limiting resource (niche), the species that is less adapted will be excluded from the community by the superior competitor
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What types of interactions do organisms have with each other?
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Mutualism, commensalism, competition, and predation
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What is a keystone species?
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A species that controls the community structure by their ecological role
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What is a succession?
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A change in the community structure and composition over time following a disturbance
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What do pioneer species do?
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They facilitate, improve the living conditions for other species, setting the stage for their own replacement
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