Which invasive species is frequently cited as problematic for aquatic ecosystems?

Water hyacinth is frequently identified as a problematic invasive species in aquatic ecosystems due to its rapid growth and ability to form dense mats on the water's surface. This aggressive proliferation can significantly disrupt local ecosystems by blocking sunlight from reaching submerged plants, which in turn affects the entire aquatic food web. The dense mats can also impede water flow, reduce oxygen levels in the water, and create ideal breeding conditions for mosquitoes, thus influencing public health.

Its presence can lead to negative impacts on water quality, disrupt recreational activities, and obstruct waterway navigation. The economic costs associated with managing water hyacinth infestations, such as mechanical removal and herbicide application, further highlight its detrimental nature when introduced to non-native habitats. These characteristics position water hyacinth as a significant concern in the management of aquatic ecosystems, making it a key focus for those studying or working in aquatic environments.