Not only population issue but compounded with lack of grass and lack of natural migration. The warm water released from power plants, runoff, etc has given the 'tees a warm place to stay year round instead of them migrating like they should. It's a catch 22 with the grass situation in the lagoon. Surely the manatees alone aren't causing the grass loss but given the ratio of manatees to remaining grass, the year-round presence sure isn't helping... As much as I hate to say it, the manatee deaths might be a good thing for the lagoon cause it puts a "poor dead manatees" headline in the news. Not enough people care about dead grass but when cute sea cows die, then there might be some traction.