Biodiversity and Types of Species - 1.27-31.25

Primary Succession

Succession that occurs in an environment where soil has not yet formed, requiring pioneer species like lichens and mosses to create soil.

Secondary Succession

Succession that occurs in areas where soil is already present and does not require lichens or mosses.

Keystone Species

A species that helps define an entire ecosystem; it holds the ecosystem together and its loss would significantly impact the ecosystem's health.

Invasive Species

Nonnative organisms that cause harm to the environment, economy, or human health, often having no natural predators.

Indicator Species

An organism whose presence, absence, or abundance reflects a specific environmental condition and is sensitive to changes.

Endemic Species

Species that are found only in a specific geographic area, making them particularly vulnerable to extinction.

Endangered Species

Species that are vulnerable to extinction in the near future.

Extinct Species

Any species of animal or plant that no longer has any individuals alive in the world.