Question

scientists predict that introducing a non - native predator into a lake will reduce native fish populations. what argument best supports their claim? native prey adapt quickly to new predators. non - native species always increase biodiversity. invasive predators disrupt existing food webs and reduce stability. human impacts on ecosystems are usually positive.

Explanation:

Invasive predators disrupt existing food webs. This disruption can lead to a reduction in native fish populations as the new predator may out - compete native species for resources or directly prey on them, thereby reducing the stability of the ecosystem. Native prey adapting quickly (if they do) would not support the claim of reduction. Non - native species "always" increasing biodiversity is an over - generalization. Human impacts on ecosystems being usually positive is incorrect as human - introduced non - native predators are often negative.

Answer:

Invasive predators disrupt existing food webs and reduce stability.