Chapter 4.1, Problem 1NV

Summary Introduction

To compare:

The terms given in the table.

Introduction:

In the biological hierarchy, the organism is the smallest unit. An organism belongs to a single species and the members of a species make up the population. Many different populations of a particular region, which interact with one another make up a community. The community includes all the living organism and community along with all the abiotic factors of that region makes up an ecosystem. In the ecosystem, many factors act on a population to ensure the balance.

Explanation of Solution

Comparison between population density, dispersion, density-dependent and density-independent factors are given as follows:

Population Density It is the number of individuals present per unit of a geographical area.	Dispersion It represents how an organism occupies the space in a habitat or a geographical region.
Density-dependent factors These are the limiting factors that depend on the density of the population present in a region. Generally, these are the factors that are used by the population as a resource, for example, food shelter, etc.	Density independent factors The density-independent factors are those limiting agents that are not dependent on the density or the number of individuals. For example, pH, temperature, and other natural disasters.

Comparison between population growth rate, emigration, immigration, and carrying capacity.

Population growth rate: It is the rate at which the number of individuals increases in a given period of time.

Emigration It refers to the migration of individuals that go out of the population to another location.

Immigration It refers to migration or the addition of individuals in a region from any other region.

Carrying capacity is the maximum number of individuals in a population, which easily survive. It is the average size of a population in a particular community. Carrying capacity is governed and limited by different environmental factors, such as shelter, adequate food and nutrition, and availability of water.