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Document Type

Research

Keywords

Upper Mississippi River, aquatic plants, Keokuk Pool, Navigation Pool 19, vascular flora

Abstract

Submersed and emergent plants were studied on the lower 42 km of Keokuk Pool (Navigation Pool 19), Upper Mississippi River in 1977. Aquatic plants occurred on a total of 1340 ha. These plants varied in coverage but when aggregated totaled 567 ha, the remainder of the 1340 ha being open water interspersion areas. Submersed species composed 55% of the aquatic plants and emergent species totaled 45 %. Dominant submersed species were Heteranthera dubia, Potamogeton pectinatus, Ceratophyllum demersum and Vallisneria americana. The emergent species documented were Nelumbo lutea and Sagittaria sp. Five major areas of aquatic plant development occurred in the study area, comprising 79.8% of the total aquatic plant area. The areal coverage of aquatic plants in Keokuk Pool increased in 1977, relative to earlier years, presumably because of increased water stability and clarity.

Publication Date

June 1985

Journal Title

Proceedings of the Iowa Academy of Science

Volume

92

Issue

3

First Page

111

Last Page

114

Copyright

© Copyright 1985 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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