Summary:
- Population is a group of organisms of the same species that live in the same area.
- The size of a population may be less important than its density.
- Often, individuals in a population are not spread out evenly.
- Instead, they may live in clumps or some other pattern.
- The pattern may reflect characteristics of the species or its environment.
- Population size influences the chances of a species surviving or going extinct.
- Generally, very small populations are at greatest risk of extinction.
- How large a population is and how fast it is growing are often used as measures of its health.