Question

Why would ecologists need to estimate the number of species in an ecosystem?

1) It is often impossible to catch representatives of every species.
2) It is often impossible to count all of the individuals in a population.
3) In order to measure genetic variability.
4) In order to quantify species evenness.

Answer 1

Ecologists estimate the number of species in an ecosystem because it is difficult to catch representatives of every species and count all individuals in a population. They also estimate species number to measure genetic variability and quantify species evenness.

Step-by-step explanation:

Ecologists need to estimate the number of species in an ecosystem for several reasons. First, it is often impossible to catch representatives of every species, so estimating the number of species gives an idea of the overall biodiversity. Second, counting all individuals in a population can also be impossible, so estimating the number of species gives an estimate of population size. Third, estimating the number of species allows ecologists to measure genetic variability and quantify species evenness.