A) Communities with any amount of plants are very resistant to disturbance.
B) Community resistance depends on whether herbivores, predators, and parasites are present.
C) Herbivore species richness and abundance both increase with small changes in plant species richness.
D) The stability of herbivore species richness and abundance responds independently of plant species richness.
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A) ecotones are only temporary.
B) in a community, as environmental conditions change, all tree species respond in the same manner relative to abundance.
C) changes in tree species abundance impacts herbivores.
D) when environmental changes occur in a community-specific tree species, abundance values change independently of other trees.
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A) Measure the abundance of plant species over space and abrupt changes in species composition.
B) Perform controlled crosses among all plant species within a community to determine the extent to which the species are reproductively isolated.
C) Measure microclimate and soil variables for abrupt changes.
D) Measure elevation, since many environmental and ecological variables change with elevation.
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A) have the most biomass in a community.
B) are usually top predators.
C) can affect community structure regardless of population size.
D) are invasive predator species that eat native herbivores.
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A) ecotone; a lower
B) ecotone; a higher
C) transition zone; the same
D) transition zone; lower
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