Gracy Olmstead points out that Mr. Berry has written:
I don’t remember what year it was when I first noticed the disappearance of the native black willows from the low-water line of this river. Their absence was sufficiently noticeable, for the willows were both visually prominent and vital to the good health of the river. Wherever the banks were broken by “slips” or the uprooting of large trees, and so exposed to sunlight, the willows would come in quickly to stabilize the banks. Their bushy growth and pretty foliage gave the shores of the river a distinctive grace, now gone and much missed by the few who remember. Like most people, I don’t welcome bad news, and so I said to myself that perhaps the willows were absent only from the stretch of the river that I see from my house and work places. But in 2002 for the first time in many years I had the use of a motor boat, and I examined carefully the shores of the twenty-seven-mile pool between locks one and two. I saw a few old willows at the tops of the high banks, but none at or near the low-water line, and no young ones anywhere.
The willows still live as usual along other streams in the area, and they thrive along the shore of the Ohio River just above the mouth of the Kentucky at Carrollton. The necessary conclusion is that their absence from the Kentucky River must be attributable to something seriously wrong with the water. And so, since 2002, I have asked everybody I met who might be supposed to know: “Why have the black willows disappeared from the Kentucky River?” I have put this question to conservationists, to conservation organizations specifically concerned with the Kentucky River, to water-quality officials and to university biologists. And I have found nobody who could tell me why. Except for a few old fishermen, I have found nobody who knew they were gone.
Read her thoughts on this at The American Conservative