HR: 1330h
AN: NB33E-05    [Abstracts]
TI: Pre-restoration Evaluation of Obion Creek, Kentucky
AU: * McMurray, S E
EM: Stephen.McMurray@mdc.mo.gov
AF: Missouri Department of Conservation, 1110 South College Avenue, Columbia, MO 65201 United States
AB: The objectives of this project were to determine the baseline water quality of a channelized stream prior to restoration and to determine the habitat parameters that could be used as restoration goals. Macroinvertebrates, habitat, temperature, D.O., %Saturation, pH and specific conductance were sampled at four locations during spring from 2000 to 2003. Data analysis included between-site comparisons, measures of community diversity and similarity, and relationships between the macroinvertebrate, habitat and physicochemical data. Significant (p ≤ 0.1) between-site differences were observed in %EPT, %Clingers, EPT, mHBI, average tolerance value, bank stability, channel attributes (flow status, alteration, sinuosity), epifaunal substrate, pool variability, riparian zone width, sediment deposition, total habitat score, D.O., %Saturation, and specific conductance. Significant (p ≤ 0.1) correlations were observed in 42 of the metric/parameter combinations. The first 4 CCA axes accounted for 53.3% of the variation in the macroinvertebrate communities, with Axis 1 accounting for the majority (16.5%). With few exceptions, all sites had fair water quality, and diversity and evenness values indicated highly diverse and evenly distributed communities at all sites. Total habitat values at unchannelized sites were indicative of higher quality habitat. Historical land-use in the project watershed will have long-term detrimental effects, regardless of restoration activities.
DE: 1803 Anthropogenic effects
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly