Mississippi River, Pool 13, macroinvertebrates, benthos, winter, substrate
In Pool 13 on the Upper Mississippi River substantial differences were observed in macroinvertebrate abundance and substrate composition among six habitat types: tailwater, main channel, main channel border, side channel, slough, and lake. Densities were highest in slough, main channel border, and lake habitats, but the number of taxa was greatest in tailwater and main channel habitats. The abundance of 38 of the 42 identified taxa was significantly correlated with either the percentage of at least one particle size fraction or the percentage of organic matter in the substrate. Variation in substrate composition among the six habitat types appeared to influence macroinvertebrate abundance.
Proceedings of the Iowa Academy of Science
© Copyright 1984 by the Iowa Academy of Science, Inc.
Hubert, Wayne A.; Darnell, Gene E.; and Dolk, Daniel E.
"Late-Winter Abundance and Substrate Associations of Benthos in Pool 13, Upper Mississippi River,"
Proceedings of the Iowa Academy of Science: Vol. 91:
, Article 7.
Available at: http://scholarworks.uni.edu/pias/vol91/iss4/7