At Some Water Bird Breeding Colonies, the Large Quantities of Excrement

Multiple Choice

At some water bird breeding colonies, the large quantities of excrement from the birds may result in the death of vegetation underneath the trees in which their nests are built.Which characteristic of the bird population would have the greatest effect on the amount of damage caused to the understory plants?

A) Diet
B) Population size
C) Type of nest built
D) Type of mating ritual
E) Competition with other bird species