The Effects of Stream Restoration and Sediment Removal on Community Dynamics and Secondary Production Rates of Benthic Invertebrates in Juday Creek, Indiana

Doctoral Dissertation

Abstract

Habitat restoration commonly is used in stream improvement and mitigation projects, but its effectiveness rarely is assessed. As mitigation for golf course construction, two 400 m sections of Juday Creek, a 3rd-order cool-water stream in northern Indiana, were relocated into new channels containing pool-riffle sequences, large woody debris, and cobble and gravel substrate in 1997. An upstream sediment basin was installed to protect habitat improvements and stream relocation areas. My dissertation focuses on the effects of stream restoration and the effect of sediment basins on the benthic macroinvertebrate community of Juday Creek.

Habitat quality, suspended and deposited sediment dynamics, and macroinvertebrate density and diversity were monitored prior to and for five years after completion of the restoration. The effectiveness of sediment basins and their maintenance was studied in two locations of Juday Creek in 2001 and 2002. From July 2002 to July 2003, nutrients, physical characteristics, suspended sediment, deposited sediment, fine benthic organic matter, and macroinvertebrates were sampled to examine the relationships among habitat restoration, sediment removal, and secondary production rates of macroinvertebrates.

Habitat quality improved and was sustained for six years in the restored reaches. Macroinvertebrate densities were higher in the restored reaches when compared to unrestored reaches. When properly maintained and designed, sediment basins were effective at reducing instream sediment loads and maintenance had little effect on the stream biota. Restored reaches had better habitat quality and lower amounts of deposited sediment than the upstream control reach. Secondary production rates were 2 to 5 times higher in the restored reach for Baetis sp., Cheumatopsyche sp., Hydropsyche morosa, and H. betteni. Rates of secondary production for Optioservus fastiditus were similar at restored and unrestored reaches.

This study suggests that the restoration improved habitat quality and availability for benthic macroinvertebrates, resulting in increased densities, number of genera, and secondary production rates. The sediment basin protected the restored reaches and greatly improved the success of this project. In addition, this study shows that secondary production rates are a sensitive indicator that may be used to evaluate the effectiveness of stream restoration projects.

Attributes

Attribute NameValues
URN
  • etd-11042008-101621

Author Kerry Gerard
Advisor Ronald A. Hellenthal
Contributor Ronald A. Hellenthal, Committee Member
Degree Level Doctoral Dissertation
Degree Discipline Biological Sciences
Degree Name PhD
Defense Date
  • 2004-12-07

Submission Date 2008-11-04
Country
  • United States of America

Subject
  • environmental quality

  • macroinvertebrate

  • limnology

  • stream

  • secondary production

  • ecology

  • sedimentation

Publisher
  • University of Notre Dame

Language
  • English

Record Visibility and Access Public
Content License
  • All rights reserved

Departments and Units

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