Final answer:
Ecosystem diversity encompasses the variety of ecosystems found in a region, including different types of biomes such as coral reefs and prairies, and contains both endemic and exotic species.
Step-by-step explanation:
Ecosystem diversity describes the full variety of ecosystems in a given area. An ecosystem is a system formed by populations of many different species interacting with each other and their environment. Examples of this diversity range from coral reefs to prairies, each supporting a unique array of species and complex interactions.
When we talk about organisms within these ecosystems, we can refer to endemic species, which are native to a particular place, and exotic species, also known as invasive species, that have been introduced to an ecosystem where they did not originally evolve. These introductions can disrupt ecosystem balance and diversity.
Terrestrial ecosystems are grouped into larger categories called biomes, including tropical rain forests, savannas, deserts, and tundras. While grouping into biomes simplifies the broad categorization of ecosystems, it's important to recognize the individual diversity within each biome. For example, the Sonoran Desert in the United States has a much different vegetative composition than the rocky desert of Boa Vista off the coast of Western Africa.