As a result, the waterways become eutrophic, which leads to their deterioration, changes in the communities of organisms and the loss of oxygen in the bottom.
Why is it worth removing harmful plants?
Dense and intensive growth of submerged plants hinder the recreational use of water systems. They may also alter the aquatic ecosystem. For example dead Eurasian watermilfoil sinks to the bottom as a plant mass and releases nutrients to the water system.
Some invasive species have economical, environmental, health and social effects. Their disadvantages and risks are prevented by removing the plant. Invasive species compete for food and habitat with other species. They change the habitat by shading other vegetation influencing water chemistry by increasing the amount of nutrients and organic matter and reducing the water flow. They also disturbe the recreational use of waters, fishing and water transport.
With the removed plant mass also nutrients are obviated, so it can improve the condition of the eutrophic lake. Removal of plant biomass can also help to improve the winter oxygen situation, because there is less degradable plant material.