When a plant like bladderwort masses up there's swings and roundabouts.
On the one hand, it will produce dense cover for desirable fish to hide beneath when dastardly Mr. Heron comes calling in the Winter months. It may well smother and destroy undesirable submerged aquatic plants when it blots out the light.
Its dense cover will help shade and cool waters around the mid 70's where in hot climates water temperatures would get excessive, beyond the mid 90's
If you were to try to establish waterlilies, you might gain from setting vulnerable starts where bladderwort will crowd around, turtles find bladderwort impenetrable but waterlilies will grow through it...
On the other hand, that dense living blanket will become a trap for every bit of gunk (pollen, pine needles, leaf litter) and algae to choke the surface with a dense, well, gunky funky mass
When it masses up, because it is a rootless plant, its fairly easy to yank the whole lot to shore and just leave it to bake in the sun...
You could choose to 'manage' the situation by letting it mass where its foliage is beneficial, and reduce it where you don't want it by dragging masses out leaving relatively clear and open waters where you want them
Regards, andy
http://www.flickr.com/photos/21940871@N06/
http://s93.photobucket.com/albums/l42/adavisus/
