Chapter 21 Lesson 1 Population

1. The Biosphere and Ecological System

1.1. Biosphere : the parts of Earth and the surrounding atmosphere where there is life

2. What is a population ?

2.1. Community : is all the populations of different species that live together in the same area at the same time

3. Competition

3.1. Competition : is the demand for resources, such as food, water, and shelter, in a short supply in a community

4. Population Sizes

4.1. Changes in a environment can result in a population sizes changes

4.1.1. Limiting Factors :

4.1.1.1. Limiting Factor : is anything that restricts the size of a population. Ex - temperature

4.1.2. Measuring Population Size

4.1.2.1. Population density : is the size of a population compared to the amount of space available

4.1.3. Biotic Potential

4.1.3.1. Biotic Potential : is the potential growth of a population if it could grow in perfect conditions with no limiting factors

4.1.4. Carrying Capacity

4.1.4.1. Carrying Capacity : the largest number of individuals of one species that an environment

4.1.5. Overpopulation

4.1.5.1. Overpopulation : When the seize of a population becomes larger that the carrying capacity of its ecosystem. It causes problems to organisms