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15 Cards in this Set

  • Front
  • Back
Biofuel
A liquid or gas fuel made from plant material (biomass).
biotic resistance
Interactions of the native species in a community with non-native species that exclude or slow the growth of those non-native species.
carbon neutral
Of or relating to fuels that produce an amount of CO2 when burned that is equal to or less than the amount taken up by the plants from which they are made.
complementarity hypothesis
A hypothesis proposing that as the species richness of a community increases, there is a linear increase in the positive effects of those species on community function. Compare redundancy hypothesis.
driver and passenger hypothesis
A hypothesis proposing that the strengths of the effects of species’ ecological functions on their communities vary dramatically, such that “driver” species have a large effect on community function, while “passenger” species have a minimal effect.
dynamic equilibrium model
An elaboration of the intermediate disturbance hypothesis proposing that species diversity is maximized when the level of disturbance and the rate of competitive displacement are roughly equivalent.
equilibrium theory
A proposed explanation for the coexistence of species in a community that relies on relatively stable coexistence due to ecological and evolutionary “compromises” that result in resource partitioning. Compare nonequilibrium theory.
intermediate disturbance hypothesis
A hypothesis proposing that species diversity in communities should be greatest at intermediate levels of disturbance because competitive exclusion at low levels of disturbance and mortality at high levels of disturbance should reduce species diversity.
lottery model
A nonequilibrium hypothesis proposing that species diversity in communities is maintained by a “lottery” in which resources made available by the effects of disturbance, stress, or predation are captured at random by recruits from a larger pool of potential colonists.
nonequilibrium theory
A proposed explanation for the coexistence of species in a community that relies on fluctuating conditions that maintain their coexistence by keeping dominant species from monopolizing resources. Compare equilibrium theory.
redundancy hypothesis
A hypothesis that assumes an upper limit on the positive effect of species richness on community function because once species richness reaches some threshold, the functions of species in the community will overlap. Compare complementarity hypothesis.
Resilience
The rate of recovery after a disturbance.
resource partitioning
The use of limiting resources by different species in a community in different ways.
resource ratio hypothesis
A hypothesis that posits that species can coexist in a community by using resources the same resources but in different proportions.
Stability
The tendency of a community to remain the same in structure and function.