The Scope Of Population Ecology

1637 WordsJul 29, 20157 Pages
1. Define the scope of population ecology. • The scope of population ecology is the study of populations in relation to the environment, including environmental influences on population density and distribution, age structure, and variations in population size. 2. Distinguish between population and density. • Population is a group of individuals of the same species occupying a good given area, like the population of America. Population density is the number of individuals in some specified area or volume of a habitat, such as the number of guppies per liter of water in a stream. 3. Explain how ecologists measure species density. • Ecologists have baselines of approximate population densities for many organisms. For example, a baseline would be the estimate of 4 deer per square kilometer. A full count is another way ecologists measure species density, by making counts of large organisms in small areas and then estimating a total density. For animals that migrate throughout the year ecologists use a capture-recapture method, by which they mark the animals, release them, and recapture them at a later time. 4. Describe conditions which may result in clumped dispersion, random dispersion, a uniform dispersion of population. • Dispersion is the pattern of spacing among individuals within the population. Clumped dispersion occurs when a group of animals or plants are grouped together in some parts of an area, while in the other parts of that area there are no groups of that
Open Document