Question

Explain why the fact that invasive species did not co-evolve with the native species unbalances an ecosystem.
short paragraph

Answer 1

Because invasive species evolved elsewhere, they lack the long history of reciprocal adaptations that tie native communities together. Native predators, parasites, competitors and mutualists often cannot control the invader, and native species may have no effective defenses or strategies against it. That allows the invader to grow unchecked, outcompete or prey on natives, and alter food webs, nutrient cycling and habitat structure, producing cascading changes and reduced biodiversity that unbalance the ecosystem.