caa a22 4500 467903344 CHVBK 20180406152825.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s10661-005-9025-4 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9025-4 Influence of Riffle and Snag Habitat Specific Sampling on Stream Macroinvertebrate Assemblage Measures in Bioassessment [Elektronische Daten] [Lizhu Wang, Brian Weigel, Paul Kanehl, Kirk Lohman] Stream macroinvertebrate communities vary naturally among types of habitats where they are sampled, which affects the results of environmental assessment. We analyzed macroinvertebrates collected from riffle and snag habitats to evaluate influences of habitat-specific sampling on taxon occurrence, assemblage measures, and biotic indices. We found considerably more macroinvertebrate taxa unique to snags (143 taxa) than to riffles (75 taxa), and the numbers of taxa found in both riffles and snags (149 taxa) were similar to that found in snags. About 64% of the 47 macroinvertebrate measures we tested differed significantly between riffles and snags. Eighty percent intercepts of regressions between biotic indices and urban or agricultural land uses differed significantly between riffles and snags. The Hilsenhoff biotic index calculated from snag samples explained 69% of the variance of riffle samples and classified 66% of the sites into the same stream health group as the riffle samples. However, four multimetric indices for snag samples explained less than 50% of the variance of riffle samples and classified less than 50% of the sites into the same health group as the riffle samples. We concluded that macroinvertebrate indices developed for riffle/run habitat should not be used for snag samples to assess stream impairment. We recommend developing an index of biotic integrity specifically for snags and using snags as an alternate sampling substrate for streams that naturally lack riffles. Springer Science+Business Media, Inc., 2006 macroinvertebrate nationallicence streams nationallicence bias nationallicence riffle habitat nationallicence snag habitat nationallicence macroinvertebrate biotic index nationallicence environmental impacts nationallicence habitat-specific sampling nationallicence Wang Lizhu Institute for Fisheries Research, Michigan Department of Natural Resources, University of Michigan, 212 Museums Annex, 48109, Ann Arbor, MI, USA aut Weigel Brian Wisconsin Department of Natural Resources, Fisheries and Habitat Research, 1350 Femrite Drive, 53716, Monona, WI, USA aut Kanehl Paul Wisconsin Department of Natural Resources, Fisheries and Habitat Research, 1350 Femrite Drive, 53716, Monona, WI, USA aut Lohman Kirk U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, 54603, La Crosse, WI, USA aut Environmental Monitoring and Assessment Kluwer Academic Publishers 119/1-3(2006-08-01), 245-273 0167-6369 119:1-3<245 2006 119 10661 https://doi.org/10.1007/s10661-005-9025-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9025-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Lizhu Institute for Fisheries Research, Michigan Department of Natural Resources, University of Michigan, 212 Museums Annex, 48109, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Weigel Brian Wisconsin Department of Natural Resources, Fisheries and Habitat Research, 1350 Femrite Drive, 53716, Monona, WI, USA aut NATIONALLICENCE 700 1- Kanehl Paul Wisconsin Department of Natural Resources, Fisheries and Habitat Research, 1350 Femrite Drive, 53716, Monona, WI, USA aut NATIONALLICENCE 700 1- Lohman Kirk U.S. Geological Survey, Upper Midwest Environmental Sciences Center, 2630 Fanta Reed Road, 54603, La Crosse, WI, USA aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 119/1-3(2006-08-01), 245-273 0167-6369 119:1-3<245 2006 119 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer