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The Impact of Sewage Effluent on the Occurence of Psychodidae (Diptera) in a Stream

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Wagner,  Rüdiger
Limnological River Station Schlitz, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

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Zitation

Masteller, E. C., & Wagner, R. (1984). The Impact of Sewage Effluent on the Occurence of Psychodidae (Diptera) in a Stream. Freshwater Invertebrate Biology, 3(2), 98-104.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-000F-CB36-F
Zusammenfassung
Psychodidae (22 spp.) were collected from 2 streams in northwestern Pennsylvania [USA] from 1979-1981, using aquatic emergence traps. At Fourmile Creek, 644 specimens were collected from 2 sites, 1 upstream and 1 downstream from a discharge of sewage effluent, while at another control site (Sixmile Creek), 257 specimens were collected. At the sewage affected site in 1981, 13 spp. were collected with Psychoda parthenogenetica accounting for 65% and Tinearia alternata for 19% of the collection while at the upstream site 16 spp. were collected. Telmatoscopus quadripunctatus accounted for 19% in 1981 and T. limicola for 33% in 1980 at this upstream site. At Sixmile Creek in 1981, 13 spp. were collected and Quateiella interdicta (43%) was most abundant while in 1979 Panimerus basalis (43%) was dominant. The tribe Psychodini was most abundant in the sewage-contaminated water while the tribes Pericomini and Tematoscopini were most abundant at the uncontaminated sites.