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A Comparison of the Macroinvertebrate Assemblage in Doe Run Creek, Kentucky: 1960 and 1990

Paul D. Johnson, Kenneth M. Brown and Charles V. Covell, Jr.
Journal of the North American Benthological Society
Vol. 13, No. 4 (Dec., 1994), pp. 496-510
DOI: 10.2307/1467846
Stable URL: http://www.jstor.org/stable/1467846
Page Count: 15
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Comparison of the Macroinvertebrate Assemblage in Doe Run Creek, Kentucky: 1960 and 1990
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Abstract

We compared the macroinvertebrate assemblage of Doe Run Creek, Kentucky, in 1990 with that found by Minckley in 1960. Physico-chemical variables such as discharge, current velocity, temperature, dissolved oxygen, and pH were similar in both studies, although dissolved iron concentration increased and light transmission to the stream's surface decreased. Similarly differences between 1960 and 1990 in total invertebrate density and taxonomic richness did not exceed annual, seasonal, and among-habitat differences. Although individual invertebrate-habitat associations often changed between the two studies, differences were also within the range seen annually or seasonally. This spring-fed stream is thus a fairly stable ecological system, at least in terms of system-level parameters like total abundance and taxonomic richness.

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