Final answer:
The fact that invasive species did not co-evolve with the native species unbalances an ecosystem by leading to a decline in the population of native species and disruption of the natural balance.
Step-by-step explanation:
The fact that invasive species did not co-evolve with the native species unbalances an ecosystem because the native species are not adapted to compete with or defend against the invasive species. This can lead to a decrease in the population of the native species and disruption of the natural balance of the ecosystem.
For example, if an invasive plant species is introduced to an ecosystem, it may outcompete native plants for resources like sunlight, water, and nutrients. This can lead to a decline in native plant populations and a loss of biodiversity.
Similarly, invasive animal species can prey on or outcompete native animal species, leading to population declines and changes in community dynamics. Without natural predators or competitors, invasive species can quickly multiply and spread, further disrupting the ecosystem.
Learn more about impact of invasive species on ecosystems