Accession Number : ADA261361


Title :   Effects of Increased Commercial Navigation Traffic on Freshwater Mussels in the Upper Mississippi River: 1991 Studies.


Descriptive Note : Final rept.,


Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB


Personal Author(s) : Miller, Andrew C ; Payne, Barry S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261361.pdf


Report Date : Jan 1993


Pagination or Media Count : 141


Abstract : In 1988, the US Army Engineer District, St. Louis, initiated a program to analyze the effects of commercial navigation traffic on freshwater mussels (Mollusca: Unionidae), especially the endangered Lampsilis higginsi, in the upper Mississippi River. Preliminary studies were conducted in 1988; detailed studies were initiated in 1989 and will continue for at least 6 years. In July 1991, mussels were collected using qualitative and quantitative (0.25 sq m total substratum) methods at dense and diverse beds in Pool 24 (river mile (RM) 299.6), Pool 14 (RM 504.8), and Pool 10 (RM 635.2). Water velocity and suspended solids concentrations were measured immediately following vessel passage near sites where mussels were collected in Pools 24 and 10. An assessment of commercial navigation traffic effects will be based on a comparison of baseline data (1988-94) with data collected during periods of increased traffic intensity following 1994.... Mississippi River, Navigation traffic, Mussels, Unionidae.


Descriptors :   *WATER POLLUTION , *MARINE TRANSPORTATION , *MISSISSIPPI RIVER , *ECOLOGY , *MUSSELS , VELOCITY , MOLLUSCA , WATER , RIVERS , ARMY CORPS OF ENGINEERS , SITES , SOLIDS


Subject Categories : Ecology
      Marine Engineering
      Water Pollution and Control


Distribution Statement : APPROVED FOR PUBLIC RELEASE