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Document Type

Research

Keywords

Diatoms, Upper Mississippi River, Attached Algae

Abstract

Attached diatom communities were studied along the border of the main channel of Navigation Pools 5 and 9 of the Upper Mississippi River. A total of 296 diatom taxa representing 42 genera were observed in the study. Approximately 52% of the taxa were common to both pools. The number of taxa was greatest in both study areas during the spring and fall and lowest during the summer. Coccones placentula var. euglypta (Ehr) Cl. usually accounted for ca 50% of the diatom density during the summer in Pool 5, whereas Cocconeis placentula var. euglypta and Navicula tripuntata var. schizonemoides (V. H.) Patr. were codominant taxa during the summer in Pool 9. Similar dominance by one or two species was usually not observed during the spring and fall. Because the present studies were limited to main channel areas, the number of taxa observed in this study probably represents only a portion of the diatom flora of typical pools of the Upper Mississippi River.

Publication Date

June 1984

Journal Title

Proceedings of the Iowa Academy of Science

Volume

91

Issue

2

First Page

52

Last Page

56

Copyright

© Copyright 1984 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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