how does a decrease in biodiversity impact an ecosystem?

Answer

Brief Explanations:

Biodiversity loss weakens ecosystem stability. Fewer species mean less resilience to environmental changes. It can disrupt food - webs, reduce nutrient cycling, and lower productivity. For example, if a keystone species disappears, it can have a cascading effect on other species in the ecosystem.

Answer:

A decrease in biodiversity can lead to reduced ecosystem stability, disrupted food - webs, decreased nutrient cycling, and lower productivity.