A Level Biology Practice Exam

Why are keystone species particularly significant for conservation efforts?

1. They are easy to replace

2. They contribute largely to ecological balance

3. They have no predators

4. They are often large mammals

The correct answer is: They contribute largely to ecological balance

Keystone species are particularly significant for conservation efforts because they play a critical role in maintaining the structure and function of their ecological communities. Their presence and activities have a disproportionately large impact on the other species in the ecosystem, which helps to establish and regulate the biodiversity and stability of the environment. For instance, when a keystone species is removed, it can lead to dramatic changes in the ecosystem, including the collapse of food webs and the decline of numerous other species. By conserving keystone species, we help to ensure that the broader ecosystem remains balanced and capable of supporting various forms of life. This importance in maintaining ecological balance underscores the focus of conservation efforts on these species, as protecting them can have cascading effects on the entire habitat.