Change in Ecosystems

the process of change in an ecosystem during which species in a community are established or replaced

a status that occurs when an entire species of organism is in danger of dying out

a status that occurs when an entire species of organism has completely died out

ecological succession fire storms drought

catching a ride pollution overgrazing using natural resources building

Ecological succession is the process of change in an ecosystem during which species in a community are established or replaced.

If the animal has no predators in this new place, overpopulation may occur. The animal might eat all the plants or other animals, leaving no food for other animals.

Endangered

Extinct

Plants and animals lose their habitats when people use land for towns and cities.

People take plants and animals to new places on purpose or by accident. The animals might then reach very high population levels if they have no predators in this new ecosystem.

When an area gets less rainfall than usual for a long period of time, plants might die and animals might move to another location to look for water.

Some types of trees have seeds that will only germinate when this change happens.

Cattle and other livestock eat all the grass and plants before new ones can grow again. This can cause deserts to form and erosion to increase.

People put harmful things in the air, water, and soil, which can cause plants and animals to get sick or even die.

This type of change can cause flooding, which might kill plants and make animals move to a new location.

People use metals, rocks, minerals, and trees as materials, which can destroy the surface of the Earth and take away habitats.