Changes in Population Size

Births and Deaths

Population Increasing and Decreasing

Today, I will explain what birth rate and death rate is. Birth rate is how many members of 1 species reproduce. Death rate shows how many members of that species died.

When a predator eats a prey, the prey's population will go down. Because of many of the prey dying, the predator's population increases, but will decrease when food become much scarcer. When most of the predators die, the prey will increases because of less threat of predator. When they go up the predator's population will increase and so on.