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BIOC50H3 (15)
Chapter 18

Lecture 17 - Chapter 18 Key Terms

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Department
Biological Sciences
Course Code
BIOC50H3
Professor
Marc Cadotte

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Chapter 18 Key Terms
x biofuel
o A liquid or gas fuel made from plant material (biomass).
x biotic resistance
o Interactions of the native species in a community with non-native species that
exclude or slow the growth of those non-native species.
x carbon neutral
o 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.
x complementarity hypothesis
o 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.
x driver and passenger hypothesis
o A hypothesis SURSRVLQJWKDWWKHVWUHQJWKVRIWKHHIIHFWVRIVSHFLHV¶HFRORJLFDO
IXQFWLRQVRQWKHLUFRPPXQLWLHVYDU\GUDPDWLFDOO\VXFKWKDW³GULYHU´VSHFLHVKDYH
DODUJHHIIHFWRQFRPPXQLW\IXQFWLRQZKLOH³SDVVHQJHVSHFLHVKDYHDPLQLPDO
effect.
x dynamic equilibrium model
o 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.
x equilibrium theory
o A proposed explanation for the coexistence of species in a community that relies
on relatively stable coexistence due to ecological and evolutionary
³FRPSURPLVHV´WKDWUHVXOWLQUHVRXUFHSDUWLWLRQLQJCompare nonequilibrium
theory.
x intermediate disturbance hypothesis
o 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.
x lottery model
o A nonequilibrium hypothesis proposing that species diversity in communities is
PDLQWDLQHGE\D³ORWWHU\´LQZKLFKUHVRXUFHVPDGHDYDLODEOHE\WKHHIIHFWVRI
disturbance, stress, or predation are captured at random by recruits from a larger
pool of potential colonists.
x nonequilibrium theory
o 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.
x redundancy hypothesis
o 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
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Description
Chapter 18 Key Terms x biofuel o A liquid or gas fuel made from plant material (biomass). x biotic resistance o Interactions of the native species in a community with non-native species that exclude or slow the growth of those non-native species. x carbon neutral o 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. x complementarity hypothesis o 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. x driver and passenger hypothesis o A hypothesis SURSRVLQJWKDWWKHVWUHQJWKVRIWKHHIIHFWVRIVSHFLHV¶HFRORJLFDOIXQFWLRQVRQWKHLUFRPPXQLWLHVYDU\GUDPDWLFDOO\VXFKWKDW³GULYHU´VSHFLHVKDYHDODUJHHIIHFWRQFRPPXQLW\IXQFWLRQZKLOH³SDVVHQJHU´VSHFLHVKDYHDPLQLPDOeffect. x dynamic equilibrium model o 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. x equilibrium theory o A proposed explanation for the coexistence of species in a community that relies on relatively stable coexistence due to ecological and evolutionary ³FRPSURPLVHV´WKDWUHVXOWLQUHVRXUFHSDUWLWLRQLQJCompare nonequilibrium theory. x intermediate disturbance hypothesis o 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. x lottery model o A nonequilibrium hypothesis proposing that species diversity in communities is PDLQWDLQHGE\D³ORWWHU\´LQZKLFKUHVRXUFHVPDGHDYDLODEOHE\WKHHIIHFWVRIdisturbance, stress, or predation are captured at random by recruits from a larger pool of potential colonists. x nonequilibrium theory o 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. x redundancy hypothesis o 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 www.notesolution.com functions of species in the community will overlap. Compare complementarity hypothesis. x resilience o The rate of recovery after a disturbance. x resource partitioning o The use of limiting resources by different species in a community in different ways. x resource ratio hypothesis o A hypothesis that posits that species can coexist in a community by using resources the same resources but in different proportions. x stability o The tendency of a community to remain the same in structure and function. www.notesolution.comChapter 18 Key Terms N biofuel o A liquid or gas fuel made from plant material (biomass). N biotic resistance o Interactions of the native species in a community with non-native species that exclude or slow the growth of those non-native species. N carbon neutral o Of or relating to fuels that produce an amount of CO 2hen burned that is equal to or less than the amount taken up by the plants from which they are made. N complementarity hypothesis o 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. N driver and passenger hypothesis o A hypothesis 574548L3J9K,99K089703J9K8419K00110.9841850.L080.4O4JL.,O 1:3.9L438439K0L7.422:3L9L08;,77,2,9L.,OO8:.K9K,97L;07850.L08K,;0 ,O,7J00110.943.422:3L91:3.9L43ZKLO05,8803J07850.L08K,;0,2L3L2,O effect. N dynamic equilibrium model o 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. N equilibrium theory o A proposed explanation for the coexistence of spec
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