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Science
Biology
Ecology
Chapter 8: Community Ecology: Structure, Species Interactions, Succession, and Sustainability
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APES
Terms in this set (30)
edge effects
differences in the physical structure and physical properties at boundaries and in transition zones between two ecosystems
species equilibrium model (theory of island biogeography)
explains the differences in species diversity with island size
native species
species that normally live and thrive in a particular ecosystem
nonnative species (exotic species or alien species)
species that migrate into an ecosystem or are deliberately or accidentally introduced into an ecosystem by humans
indicator species
species that serve as early warnings of damage to a community or an ecosystem
keystone species
species whose roles in an ecosystem are much more important than their abundance or biomass suggests
intraspecific competition
competition between members of the same species for the same resources
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
interspecific competition
competition between members of two or more different species for food, space, or any other limited resource
interference competition
one species may limit another's access to some resource, regardless or abundance, using the same type of methods found in intraspecific competition
exploitation competition
competing species have roughly equal access to a specific resource but differ in how fast or efficiently they exploit it
resource partitioning
the dividing up of scarce resources so that species with similar needs use them at different times, in different ways, or in different places
predation
members of one species feed directly on all or part of a living organism of another species
predator-prey relationship
interaction between two organisms of different species in which one organism (predator) captures and feeds on parts or all of another organism (prey)
symbiosis
a relationship in which species live together in an intimate association
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