Ecosystems - Contains ALL the living AND non- living things that interact in a particular area.
Communities - ALL the different populations of organisms within an area.
Populations ALL the members of one species in a particular area. It’s a NUMBER count. Does not matter how big or small the area is. World Population South Carolina Pop. Greenwood Pop. EMS Population
Species -Organisms that are physically similar -Can mate to produce FERTILE offspring. -Fertile means their babies can have babies. -Similar DNA (genetics)
Examples of a Species: Examples of a Species: Dogs - Different dog breeds can mate to give mixed breed that look like both parents AND the mixed puppies can have babies themselves. Cats HumansHorses
Changes in Population Size (Positive and Negative) 1.Births and Deaths 2.Immigration and Emmigration Immigration – moving into a population Emmigration - moving out of a population 3. Limiting Factors
Limiting Factors An environmental factor that causes a population to DECREASE or stop growing.