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Macroinvertebrate response to stream restoration by large wood addition

Permanent URL:
http://handle.nal.usda.gov/10113/53768
File:
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Abstract:
We examined the aquatic macroinvertebrate community response to habitat rehabilitation activities in an incised, sand-bed stream. Seventy-two large wood (LW) structures were placed along 2 km of Little Topashaw Creek (37 km2 watershed) in north-central Mississippi, USA. Macroinvertebrate collections were made from bed sediments, LW, leaf packs and qualitative multi-habitat sampling during 2 years prior to and 2 years following LW addition. Addition of LW tripled the availability of wood substrate but had no measurable effect on macroinvertebrate abundance or family richness. Ordination analyses revealed subtle differences in community composition between treated and untreated conditions, but these were related to antecedent discharge (occurrence of high flows during the preceding 6 months) and bed sediment composition rather than the availability of LW. Restoration of incising, sand-bed streams must include measures that address perturbed hydrology and degraded water quality as well as instream treatments.
Author(s):
Testa, Sam III , Shields, F. Douglas Jr. , Cooper, Charles M.
Subject(s):
aquatic communities , community structure , habitat conservation , habitats , hydrology , leaves , macroinvertebrates , streams , water quality , watersheds , wood , Mississippi
Note:
Includes references
Source:
Ecohydrology 2011 Sept.-Oct., v. 4, no. 5
Language:
English
Year:
2011
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.