Which of the following is characteristic of endemic species? a. They are often found in biodiversity hot spots. b. They are distributed widely in the biosphere. c. They require edges between ecosystems. d. They are often keystone species whose presence helps to structure a community.

Verified step by step guidance

1. Identify the definition of an endemic species: Endemic species are plants and animals that exist only in one geographic region. Such species can be confined to a particular island, country, or other defined zone.
2. Analyze option a: Consider if endemic species are often found in biodiversity hot spots, which are regions that are both rich in endemic species and have lost at least 70% of their original habitat.
3. Analyze option b: Evaluate the statement about endemic species being distributed widely in the biosphere. Recall the definition of endemic species to see if this aligns.
4. Analyze option c: Consider whether endemic species specifically require edges between ecosystems. Think about the habitats where endemic species are typically found.
5. Analyze option d: Reflect on the role of keystone species and if being endemic correlates with being a keystone species, which has a disproportionate effect on its environment relative to its abundance.

Key Concepts

Endemic Species

Endemic species are organisms that are native to and found only within a specific geographic area. This limited distribution often makes them particularly vulnerable to extinction due to habitat loss or environmental changes. They can be found in isolated ecosystems, such as islands or specific mountain ranges, where unique evolutionary processes have occurred.

Biodiversity Hot Spots

Biodiversity hot spots are regions that are both rich in endemic species and significantly threatened by human activities. These areas are crucial for conservation efforts because they contain a high number of species that are not found anywhere else, making their preservation vital for maintaining global biodiversity.

Keystone Species

Keystone species are organisms that have a disproportionately large impact on their environment relative to their abundance. Their presence or absence can significantly affect the structure and health of an ecosystem. Endemic species can sometimes serve as keystone species, playing critical roles in maintaining the ecological balance within their limited habitats.