Textbook - Chapter 12: Metapopulations

Question 1

Mainland-island metapopulation structure

Answer 1

A single habitat patch (the mainland) is the dominant source of individuals emigrating to other habitat patches (island) within a metapopulation network

Question 2

Metapopulation

Answer 2

A population broken into sets of subpopulations held together by dispersal or movements of individuals among them

Question 3

Rescue effect

Answer 3

An increase in population and a decrease in the risk of extinction brought about by an increase of immigration into a population

Question 4

Sink habitat

Answer 4

A habitat area that receives immigrants from a source habitat, but in which the subpopulation would continually decrease in size because of mortality and poor reproductive success without continual immigration from excess individuals in a source habitat.

Question 5

Sink populations

Answer 5

Local population that cannot maintain a positive growth rate; its persistence is dependent on immigration

Question 6

Source populations

Answer 6

Local population that is capable of maintaining a positive growth rate and functions as a source of emigration to other local populations within the metapoppulation