Question

Which of the following methods will provide information to an ecologist about both the size and density of a population? a. mark and recapture b. mark and release c. quadrat d. life table

Short answer

The correct answer is option c - quadrat. It allows an ecologist to gather information about both the size (from the number of individuals in the quadrat) and the density (from the number of individuals per unit area) of a population.

Step-by-step solution

Analyze Option A

Mark and recapture is a method used to estimate the total number of individuals in a population. It involves marking a portion of the population, releasing it back into the wild, then later capturing another sample from the population. However, it provides no direct information about population density, as it does not take into account the area over which the population is dispersed.

Analyze Option B

Mark and release is essentially the same technique as mark and recapture, it only varies in the name. It also doesn't explicitly provide data about the spatial distribution or density of a population.

Analyze Option C

A quadrat is a bounded area used in ecological research to sample population density and other population parameters. By counting the number of individuals within the quadrat, you get information about both the population size (count) and density (count divided by the area of the quadrat). Thus, it meets the requirement of the exercise.

Analyze Option D

A life table is an age-specific summary of the survival pattern of a population. It focuses on the mortality rates of different age groups within a population, but does not directly give information about population size or density.