Which of the following would necessarily decrease the density of a population in a given habitat ?

Options

A. Natality `gt` mortality
B. Immigration `gt` emigration
C. Mortality and emigration
D. Natality and immigration

Answer

C

Explanation

Population density in a given habitat is influenced by four processes - Natality : it is the number of births in a population during a given period of time. - Mortality : It is the number of deaths in a population during a given period of time. - Immigration : Number of individuals coming from other habitats in a given period of time. - Emigration : Number of individuals exiting from a given population in a given period of time.

Mortality and emigration will, therefore decrease the population density while natality and immigration will increase it.