Question

A species of grass is affected by the amount of rainfall in the spring. In years of high rain, the grass survives better than in years of low rain. This is an example of

a. Density dependence
b. Stochasticity
c. Deterministic factors
d. Delayed density dependence

Answer 1

The grass being affected by the amount of rainfall in the spring is an example of a density-dependent factor because its survival improves with higher population density.

Step-by-step explanation:

This is an example of a density-dependent factor because it becomes better as the population density increases.

In real-life situations, population regulation is very complicated and density-dependent and independent factors can interact. A dense population that is reduced in a density-independent manner by some environmental factor(s) will be able to recover differently than a sparse population. For example, a population of deer affected by a harsh winter will recover faster if there are more deer remaining to reproduce.

In summary, the grass being affected by the amount of rainfall in the spring is an example of a density-dependent factor because it shows how the population's survival improves with higher population density.