When Pacific salmon migrate to freshwater streams to spawn, they bring with them marine nutrients.These nutrients fertilize the freshwater habitats when the salmon dies, improving the habitat for juvenile salmon that hatch several months later.Thus, the density of the migrating salmon affects the ability of the new generation to survive.This is an example of the
A) Allee effect.
B) fecundity effect.
C) survivorship effect.
D) exponential effect.
E) carrying capacity effect.

Question

Quizplus · Accepted Answer

The given scenario is an example of the Allee effect, where the survival and reproductive success of a population become greater as the population density increases up to a certain threshold. In this case, the higher density of salmon brings more marine nutrients, which enhance the freshwater habitat quality for the juvenile salmon, improving their chances of survival. Thus, the survival and reproductive success of the new generation of salmon depend on the density of the migrating salmon.

When Pacific Salmon Migrate to Freshwater Streams to Spawn, They