Some reservoirs have aquatic vegetation that provides excellent fish habitat, but the amount of vegetation coverage fluctuates due to numerous factors (i.e., water level changes, nutrient dynamics, and cold winter temperatures).
Gee, do you think you may have forgotten to list any other reasons why vegetation may disappear from our lakes, Todd?
This guy works for TP&WD and conveniently forgets to mention that his own organization manages activities that have destroyed vegetation in lake...after lake...after lake.
SPRAYING. CHEMICALS. GRASS CARP.
Purely oversight on his part, no doubt...unless his article was proofread and edited by his buddy Richard Ott.