APES chapter 7
Terms in this set (17)
the number of different species it contains (species richness) combined with the abundance of individuals within each of those species (species evenness)
species that serve as early warnings of damage to a community or an ecosystem
how many potential occur, how they resemble or differ from one another, and how the species occupying different niches interact.
keystone species--dung beetle--
keystone species play critical ecological roles in helping sustain a community. One role is pollination. In addition, top predator keystone species feed on and help regulate the populations of other species.
they play an important role in the community by creating and enhancing their habitats in ways that benefit other species.
Instead of fighting for resources, most competition involves the ability of one species to become more efficient in acquiring food of other resources.
when one species feeds on part of another organism (the host), usually by living on or in the host.
two species or a network or species interat ina way that benefits both.
an interaction that benefits one species but has little, if any effect on the other species.
the gradual change in species composition of a given area
involves the gradual establishment of various biotic communities in lifeless areas where there is no soil in a terrestrial community or not bottom sediment in an aquatic community
the more common type of succession in which a series of communities with different species develope
competitive exclusion principle
states that no two species can coexist if they occupy the same niche and compete for the same resources
a community in which the environment is balanced between the plants and animal species; the balance of nature
the ability of a living system to resist being disturbed or altered
the ability of a living system such as a population or plants to keep its numbers within the limits imposed by available resources.
the ability of a living system to bounce back and repair damage after a disturbance that is not too drastic.
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