a partially enclosed body of water formed where a river flows into an ocean

includes any water environment and the community of organisms that live there.

contain water that has very little salt in it. can be found in rivers, lakes, and wetlands

saltwater ecosystems. They cover more than 70% of Earth’s surface.

When a community starts to grow in an area that has no soil

a well-adapted species that has become dominant within an ecosystem.

The first organisms to live in an uninhabited area.

a series of stages that occur when an ecosystem is damaged but the soil is left intact, allowing for the original community to regrow.

the process in which organic matter and nutrients slowly build up in a lake or pond ecosystem

an event that changes an ecosystem.

the slow development or replacement of an ecological community by another ecological community over time.

an area of land that is saturated, or soaked, with water for at least part of the year.

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