Value of Selected Mussel Beds in the Upper Mississippi River for LampsilisHigginsi

摘要

Bivalve surveys were conducted at six locations in the upper Mississippi River atbeds designated as essential habitat for the endangered mussel Lampsilis higginsi (Lea). Mussel beds were located at Drew Chute, Pool 19, near River Mile (RM) 407, left descending bank (LDB); Sylvan Slough, Pool 15, near RM 485, LDB; Goetz Island, Pool 11, near RM 612, right descending bank (RDB); lower East Channel, Pool 10, near RM 635; Harpers Slough, Pool 10, near RM 641, RDB; and Whiskey Rock, Pool 9, near RM 656, RDB. All of these beds were characterized by moderate