I was listening to 610 sports this morning and they were talking about the changes to our coastal bays over the years.
For me it is a combination of the damming of rivers and ship channels. Our bays were never meant to have 1/2 mile wide 60ft deep channels dug in them and they were a place where fresh water and salt water mixed.
I think the chemical pollution effect was bad, say back in the 60's early 70's - but since then the outflow from all the plants is seriously cleaned up. And like stated above, without the industry, there'd be darn little around here.
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Population growth and coastal development, habitat degredation, reduction of fresh water inflows, nutirent loading from agricultural runoff which causes algal blooms and fish kills and a huge increase in fishing pressure including the unchecked growth of commercial fishing guides. wos
Our bays and their inhabitants have tolerated thousands of years of drought and flood so even dams and channels are well tolerated...but they can't overcome too many hooks, nets, and props in their backyard.