Why are specialist species more vulnerable to biodiversity loss than generalist species?

Specialist species are more vulnerable to biodiversity loss because they are highly adapted to narrow habitats, limited food resources, or specific environmental conditions.1

Because their survival depends on these precise requirements, they lack the flexibility to adapt when their environment changes or is disturbed. In contrast, generalist species are adapted to a wide variety of habitats and food sources, allowing them to better withstand environmental shifts. When conditions change, specialists often face dramatic population declines and extinction, while generalists frequently become the dominant species in the ecosystems vacated by the specialists. This process leads to "ecosystem homogenization," where the unique complexity and distinctiveness of an area are reduced as specialist species are lost.1