Invasive plants compete with native species for resources such as water, sunlight, nutrients, and space. They can outcompete native plants by growing faster, reproducing more prolifically, and adapting better to local conditions. This competition can lead to a decrease in biodiversity as invasive plants take over habitats, reduce available resources for native species, and ultimately disrupt the balance of the local ecosystem. Additionally, invasive plants can alter soil composition, change water availability, and even release chemicals that inhibit the growth of native species, further impacting the ecosystem.