Abstract
Abstract Plecoptera species are documented from 6 longitudinal sites over a 10-year period 2002 - 2012 in a southwestern Missouri Ozark stream, including a Missouri Department of Natural Resources reference reach. Benthos, light trapping, net, and hand collections were used to capture Plecoptera every month of the year with highest sampling Nov - Jun. We collected 5,645 individuals representing 7 families, 17 genera, and 29 species including 4 confirmed species of Capniidae (38% of total), 3 Leuctridae (29%), 2 Taeniopterygidae (1.2%), 1 Nemouridae (0.81%), 3 Chloroperlidae (0.95%), 12 Perlidae (27%), and 5 Perlodidae (3.1%). Allocapnia rickeri, followed by Zealeuctra claasseni, Agnetina capitata, Acroneuria frisoni, and Perlesta decipiens were the most commonly collected species. An expected longitudinal downstream gradient of increasing Plecoptera richness was apparent, ranging from 9 species collected in stream headwaters to 21 species at the most downstream site. Identifiable richness throughout the watershed was highest between January and May (19 species present in April). Plecoptera richness in this stream compares favorably to collections in two high-quality streams in the western Ozarks in northeastern Oklahoma and streams in the Ouachita Mountains of central Arkansas.
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