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BIOL 206 Chp 14 The Structure of Communities
Terms in this set (13)
The presence or absence of species according to their physiological tolerance of abiotic conditions.
The concept that communities are random assemblages of species physiologically tolerant of the abiotic conditions.
A model of community structure in which biological processes, especially competition, act on species' niches to permit coexistence.
ghost of competition past
An explanation for communities with niches that appear to be randomly associated because competition eliminated some species in the past.
The relationship among coexisting species under environmental filtering.
The relationship among coexisting species when competition is the dominant structuring mechanism.
The proportion of the variation in a community characteristic explained by genetic variation in a particular species.
A mechanism in which the presence of one species increases the probability that another species is present.
A predator whose presence is central to the structure of the community.
When two similar species are both negatively affected by a shared predator or herbivore. The negative impact on both species mimics the effect of competition.
Describes a community composed of (1) species that are either rare or common and (2) core species with high abundance and frequency, or satellite species found at low abundance and in few sites.
A set of communities with similar composition connected by dispersal.
Species that are typically rare and occur at low density.
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