Sampling the dominant benthic macroinvertebrates of Mississippi River


Eckblad, J.  1992.  Sampling the dominant benthic
macroinvertebrates of Mississippi River backwater lakes.  Report
by Luther College, Decorah, Iowa, for the U.S. Fish and Wildlife
Service, Environmental Management Technical Center, Onalaska,
Wisconsin, December 1992.  EMTC 92-S014.  13  pp.  (NTIS
#PB94-114477)


ABSTRACT

Sampling studies were conducted during the summer of 1990 to
help evaluate how many samples should be taken to adequately
describe the benthos from backwater lakes of the Upper
Mississippi River.  Sampling was restricted to open-water
locations from backwater lakes known to have finer sediment
substrata (i.e., silt and clays).  It was also know that the
presence of submerged or emergent vegetation would influence
benthos numbers, and sampling from these areas was avoided.  The
theoretical basis for estimating sampling accuracy with
increased sample size is described in the Appendix.


KEYWORDS

macroinvertebrates, Upper Mississippi River, backwater lakes,
population density