Why must mechanical harvesting be repeated several times during the season?

Mechanical harvesting must be repeated several times during the season primarily because aquatic plants are capable of regrowth from uncut portions. When plants are mechanically cut, the remaining parts below the waterline or any fragments that can root and sprout new growth can quickly regenerate. Aquatic plants often have the ability to adapt and thrive even after being harvested, which necessitates ongoing management through repeated harvesting to effectively control their growth and prevent them from dominating the ecosystem again.

This repeated process is essential to maintain the desired balance in aquatic habitats, as excessive plant growth can lead to decreased water quality, hinder recreational activities, and negatively impact native species. It helps to ensure that the invasive or unwanted species do not return and allows for better management of the aquatic environment throughout the growing season.