HR: 1330h
AN: NB33T-10    [Abstracts]
TI: Exploring Metrics in the 4th Dimension: Temporal Variability in Lotic Macroinvertebrate Community Structure
AU: Sites, R W
EM: bugs@missouri.edu
AF: University of Missouri - Columbia, Division of Plant Sciences Subdivision of Entomology U-18 Agriculture Building, Columbia, MO 65211 United States
AU: * Kosnicki, E
EM: ekdy7@mizzou.edu
AF: University of Missouri - Columbia, Division of Plant Sciences Subdivision of Entomology U-18 Agriculture Building, Columbia, MO 65211 United States
AB: Many benthic macroinvertebrate biological monitoring programs typically sample once or twice a year. Community measurements, known as metrics, are used as a means of making comparisons between sites. However, metrics used in making assessments at localities are often calibrated within a general period of time that may span weeks or even months. Considering the expeditious nature of insect life-cycles, many metrics may be subject to considerable temporal variability. Macroinvertebrates were sampled on 10 relatively equally spaced dates throughout a year at a reference stream in central Missouri. The coefficient of variation (CV) showed that some metrics were subject to more temporal variability than were others. The Biotic Index was the lowest (CV = 11.43) whereas the ratio of shredders to total was the highest (CV = 160.48). Temporal patterns in community structure were examined.
DE: 1871 Surface water quality
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly