DES MOINES, Iowa, Aug. 26 -- The Iowa Department of Natural Resources issued the following news release: * * * Natural backwater wetland, Klum Lake should be on birders, duck hunters radar this fall * Ringed by trees and away from the busy roads in eastern Louisa County, Klum Lake has undergone a significant makeover over the past decade or so. The 250-acre natural floodplain lake - historically connected to the Mississippi River by Muscatine Slough - had been filled with eight-foot-tall cat  more