HR: 1330h
AN: NB33C-09    [Abstracts]
TI: Bottle Traps and Dipnetting: Evaluation of two Sampling Techniques for Assessing Macroinvertebrate Biodiversity in Depressional Wetlands.
AU: * Serieyssol, C A
EM: seri0026@umn.edu
AF: Department of Water Resources Science, University of Minnesota 1985 Buford Ave, Saint Paul, MN 55108 United States
AU: Bouchard, R W
EM: bouch001@tc.umn.edu
AF: Department of Entomology, University of Minnesota 1980 Folwell Ave, Saint Paul, MN 55108 United States
AU: Sealock, A W
EM: seal0028@umn.edu
AF: Department of Water Resources Science, University of Minnesota 1985 Buford Ave, Saint Paul, MN 55108 United States
AU: Rufer, M M
EM: rufer002@umn.edu
AF: Department of Entomology, University of Minnesota 1980 Folwell Ave, Saint Paul, MN 55108 United States
AU: Chirhart, J
EM: joel.chirhart@pca.state.mn.us
AF: Minnesota Pollution Control Agency, 520 Lafayette Road, Saint Paul, MN 55155 United States
AU: Genet, J
EM: john.genet@pca.state.mn.us
AF: Minnesota Pollution Control Agency, 520 Lafayette Road, Saint Paul, MN 55155 United States
AU: Ferrington, L C
EM: ferri016@umn.edu
AF: Department of Entomology, University of Minnesota 1980 Folwell Ave, Saint Paul, MN 55108 United States
AB: Dipnet (DN) sampling is routinely employed for macroinvertebrate bioassessments, however it has been shown that some taxa are more effectively sampled with activity traps, commonly called Bottle Traps (BT). In 2001, the Minnesota Pollution Control Agency used both DN and BT sampling in nine depressional wetlands in the North Central Hardwood Forest Ecoregion to evaluate macroinvertebrate biodiversity for the purpose of assessing water quality and developing biological criteria. Both methods, consisting of five bottle trap samples and two dip net samples per wetland, were collected from each of two sites in each wetland. To determine the performance of each method in documenting biodiversity, we compared taxa and their abundances by wetland, for each type of sample. DN sampling was more effective, with 44 of 140 macroinvertebrate taxa only identified from DN, compared to 14 only from BT. By contrast, BT more effectively collected leeches and beetles, especially active swimmers such as Tropisternus and several genera of Dytiscidae. However, taxa richness patterns for BT and DN were not strongly correlated. Consequently, we conclude these two sampling methods complement each other, providing a better overall picture of macroinvertebrate biodiversity, and should be used jointly when investigating macroinvertebrate biodiversity in depressional wetlands.
DE: 1890 Wetlands
DE: 9903 NABS Student Award Methodology
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly