What impact do invasive species have on waterways?

Invasive species often have a profound impact on waterways by disrupting local ecosystems and threatening native species. When organisms that are not native to a specific environment are introduced, they can outcompete indigenous species for resources such as food, habitat, and light. This competition can lead to declines in native populations, altering food webs and the overall structure of the ecosystem.

Invasive species can also introduce diseases or parasites to which local species have no natural immunity, further stressing native populations. For example, the introduction of zebra mussels to North American waterways has led to significant ecosystem changes by filtering water and depleting resources needed by native mussels and other aquatic organisms.

Additionally, invasive plants can block sunlight, disrupt water flow, and change sediment dynamics, which can also negatively impact fish and other aquatic life. Overall, the presence of invasive species can create a cascade of effects that diminish biodiversity, alter food chains, and lead to long-term ecological damage, emphasizing why they are a significant concern in waterways management.