Well, it seems that what we are discussing is how animal dropings miles from any bay or ocean effect the lives of mollusks. I doubt if the droppings of bufalo, at one time in the millions, ever had such an effect. One reason being that the dried droppings were used for fuel. The raising of poke chops and hamburger-on-the-hoof in ever increasing numbers does seen to offer the threat of some imbalancing of the natural environment. It's worth talking about. Art