On a sunny September morning on the Connecticut River, Gregory Bugbee nudged his skiff into Selden Cove in Hadlyme and it happened again. He got stuck. Two years ago, the cove was a magnet for anglers, a clear pond from which Selden Creek runs south through sunken meadows of wild rice and drowned oaks to join the river at the bottom of Selden Neck. Now you can’t sink a hook in the cove. It can ...