Question

Because a direct count of all individuals within a population is often impossible, population density is usually estimated by one or more methods of ________.

Answer 1

Population density is estimated by sampling representative portions of the habitat using methods like the quadrat method.

Step-by-step explanation:

Population density is usually estimated by one or more methods of sampling a representative portion of each habitat and using this sample to make inferences about the population as a whole. For immobile organisms or small and slow-moving organisms, a quadrat is often used. A quadrat is a square structure that is randomly located on the ground and used to count the number of individuals that lie within its boundaries. By placing the square at random locations within the habitat enough times, an accurate estimate of population size and density can be obtained.