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Colonizing macroinvertebrates in the Upper Mississippi River with a comparison of basket and multiplate samplers *
Author(s) -
HALL THOMAS J.
Publication year - 1982
Publication title -
freshwater biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.297
H-Index - 156
eISSN - 1365-2427
pISSN - 0046-5070
DOI - 10.1111/j.1365-2427.1982.tb00616.x
Subject(s) - invertebrate , environmental science , biomass (ecology) , ecology , substrate (aquarium) , hydrology (agriculture) , biology , geology , geotechnical engineering
SUMMARY. Colonizing aquatic macroinvertebrates were collected from two kinds of artificial substrate placed on wing dams in Pool 13 of the Upper Mississippi River in September 1978. Thirty‐one taxa were collected from basket samplers containing cement spheres and twenty‐one taxa from multiplate samplers constructed from tempered hardboard. Hydro‐psychidae (Trichoptera), especially Cheumatopsyche sp., Potamyla flava and Hydropsyche sp., were the dominant macroinvertebrates which colonized both samplers. Basket samplers had a significantly greater macroinvertebrate density, biomass and number of taxa compared with multiplate samplers. Precision of the arithmetic mean for density, biomass and number of taxa was 19.9, 18.3 and 8.1% for basket samplers and 18.8, 18.7 and 8.5% for multiplate samplers. The number of sampling units required for a precision of 20% for macroinvertebrate density, biomass and number of taxa was 13, 11 and 2 for basket samplers and 11, 11 and 2 for multiplate samplers. Basket samplers with 7.5‐cm cement spheres are recommended for use instead of multiplate samplers.