2. What form of density dependence does this graph represent?
You said that this graph,
represents (b) b and d are density independnet.
no -- compare the b value for an individual in a population with a small
N with b for an individual in a large population. If it's different, then b
depends on density. The same for d ... in this example, both b values and d
values change between small and large populations.
Remember, b and d are the birth and death rates per individual.
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You said that this graph represents (c) only b as density dependnet.
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no -- if the birth rate were density independent, its value would be the
same whether N was 5, 50, or 500. For a population whose b was
density-independent, the b "curve" would be a horizontal line as shown below.
Remember, b and d are the birth and death rates per individual.
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You said that this graph represents (d) only d is density independent.
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no -- if the death rate were density independent, its value would be the
same whether N was 5, 50, or 500. For a population whose d was
density-independent, the d "curve" would be a horizontal line as shown below.
Remember, b and d are the birth and death rates per individual.
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