caa a22 4500 467903123 CHVBK 20180406152824.0 cr unu---uuuuu 170328e20061101xx s 000 0 eng 10.1007/s10661-005-9178-1 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9178-1 Lyons John Wisconsin Department of Natural Resources, 2801 Progress Drive, 53716-3339, Madison, WI, USA aut A Fish-Based Index of Biotic Integrity to Assess Intermittent Headwater Streams in Wisconsin, USA [Elektronische Daten] [John Lyons] I developed a fish-based index of biotic integrity (IBI) to assess environmental quality in intermittent headwater streams in Wisconsin, USA. Backpack electrofishing and habitat surveys were conducted four times on 102 small (watershed area 1.7-41.5 km2), cool or warmwater (maximum daily mean water temperature ≥22 C), headwater streams in spring and late summer/fall 2000 and 2001. Despite seasonal and annual changes in stream flow and habitat volume, there were few significant temporal trends in fish attributes. Analysis of 36 least-impacted streams indicated that fish were too scarce to calculate an IBI at stations with watershed areas less than 4 km2 or at stations with watershed areas from 4-10 km2 if stream gradient exceeded 10 m/km (1% slope). For streams with sufficient fish, potential fish attributes (metrics) were not related to watershed size or gradient. Seven metrics distinguished among streams with low, agricultural, and urban human impacts: numbers of native, minnow (Cyprinidae), headwater-specialist, and intolerant (to environmental degradation) species; catches of all fish excluding species tolerant of environmental degradation and of brook stickleback (Culaea inconstans) per 100 m stream length; and percentage of total individuals with deformities, eroded fins, lesions, or tumors. These metrics were used in the final IBI, which ranged from 0 (worst) to 100 (best). The IBI accurately assessed the environmental quality of 16 randomly chosen streams not used in index development. Temporal variation in IBI scores in the absence of changes in environmental quality was not related to season, year, or type of human impact and was similar in magnitude to variation reported for other IBI's. Springer Science+Business Media, Inc., 2006 Bioassessment nationallicence ecological indicators nationallicence fish assemblages nationallicence headwaters nationallicence IBI nationallicence human impacts nationallicence species richness nationallicence watershed land use nationallicence Environmental Monitoring and Assessment Kluwer Academic Publishers 122/1-3(2006-11-01), 239-258 0167-6369 122:1-3<239 2006 122 10661 https://doi.org/10.1007/s10661-005-9178-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9178-1 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Lyons John Wisconsin Department of Natural Resources, 2801 Progress Drive, 53716-3339, Madison, WI, USA aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 122/1-3(2006-11-01), 239-258 0167-6369 122:1-3<239 2006 122 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer