diatoms, species diversity, short-count methods, small Iowa streams, Sequential Comparison Index, Shannon Index of General Diversity
This study was undertaken to determine if short-count methods for calculation of diatom species diversity could be used to determine the water quality of small streams. Two small streams, located in North Central Iowa, were selected for study; one was chosen because it appeared to be in a relatively healthy condition and the other because it appeared to be highly polluted. Diatom samples were collected by direct field collection of the predominant diatom growths in each stream. Short-counts of 50, 100, 200, 500, and 1000 diatom valves were made and species diversity computed by 2 methods, the Shannon Index of General Diversity and the Sequential Comparison Index. A one-way analysis of variance using mean species diversity values was run on all diatom counts both within and between the samples of each stream. The results showed that short-counts could be used to determine differences in water quality of the 2 small streams studied and further suggest that such analyses might be suitable for other small streams.
Proceedings of the Iowa Academy of Science
©1979 Iowa Academy of Science, Inc.
Slock, James A.
"The Use of Short-Count Methods on Field Collected Diatom Communities to Determine Water Quality of Small Streams,"
Proceedings of the Iowa Academy of Science, 86(4), 141-144.
Available at: https://scholarworks.uni.edu/pias/vol86/iss4/7