What role do invasive species typically play in ecosystems?

Invasive species are organisms that are not native to a specific ecosystem and, when introduced, can cause significant disruption. These species often possess advantages that enable them to outcompete native species for resources such as food, habitat, and light. This competition can lead to declines or even local extinctions of native species, ultimately reducing biodiversity within the ecosystem.

Moreover, invasive species may alter the physical and biological characteristics of the habitats they invade. Their presence can lead to changes in nutrient cycling, disrupt food webs, and impact community structure, which can destabilize the existing ecological balance. While some may argue that invasive species can fill niches in an ecosystem, the net effect tends to be detrimental to native populations and overall ecosystem health.

In summary, the role of invasive species is predominantly characterized by their ability to outcompete and displace native species, leading to ecological imbalances and a decline in biodiversity.