Exam 12: Metapopulations

The rescue effect of a population decreases its risk of extinction.

A(n)________ consists of a collection of local,interacting subpopulations that are linked by dispersal.

The ability of an organism to colonize available habitats is influenced by its rate of ________,which is affected by fecundity and mode of reproduction.

Local population dynamics are influenced by patch size and ________.

________ involves the movement of individuals from occupied patches (existing local populations)to unoccupied patches to form new local populations.

The extinction rate (E)of a metapopulation ________ as the proportion of patches occupied (P)increases.

Increasing patch size may influence the persistence of local populations by increasing the potential for environmental ________.

The model of population dynamics developed by Richard Levins assumes that

At the metapopulation,or regional,scale,population dynamics are governed by the interaction of ________ populations.

Which of the following factors can synchronize metapopulation dynamics?

In the equation,P = 1 - e / m,e represents the

The model of metapopulation growth is similar to the logistic model of population growth in that both are regulated by density-dependent factors.

A large patch of habitat tends to be more spatially heterogeneous than a small patch of habitat.

The probability of core population extinction is less than that of satellite populations in a metapopulation.

A source population is more likely than a sink population to become extinct.

As heterogeneity of habitat in a local population increases,the population density fluctuates more.

Sexually reproducing plants tend to have lower rates of local extinction than asexually reproducing plants.

The rescue effect on the size of a local population results from

Population densities are usually ________ in smaller species than in larger species.