What is the purpose of using benthic barriers in aquatic weed control?

Using benthic barriers in aquatic weed control is primarily aimed at smothering and preventing aquatic plants from rooting. Benthic barriers are physical covers that are placed on the bottom of water bodies to restrict light penetration and inhibit the growth of unwanted aquatic plants. By blocking sunlight, the barriers create an unfavorable environment for these plants to thrive, thus preventing them from rooting and growing. This approach is particularly effective for managing invasive species and controlling the spread of weeds that can disrupt aquatic ecosystems.

This method allows for a more targeted approach to weed management without relying heavily on chemical herbicides, which can have broader environmental impacts. The use of benthic barriers maintains water quality and helps protect beneficial native flora by minimizing competition for resources like light and nutrients.