Effects of anthropogenic salinization on biological traits and community composition of stream macroinvertebrates
DOI: 10.1016/j.scitotenv.2013.08.058
Title: Effects of anthropogenic salinization on biological traits and community composition of stream macroinvertebrates
Journal Title: Science of The Total Environment
Volume:
Publication Date: 15 January 2014
Start Page: 943
End Page: 949
Published online: online 28 September 2013
ISSN: 0048-9697
Author: Eduard Szö;csa, Eckhard Coringb, ;rgen Bä;theb, Ralf B. Schä;fera
Affiliations:

  • a Institute for Environmental Sciences, University Koblenz-Landau, Fortstraße 7, 76829 Landau, Germany

  • b EcoRing, Lange Straße 9, 37181 Hardegsen, Germany
  • Abstract: tion of rivers resulting from industrial discharge or road-deicing can adversely affect macroinvertebrates. Trait-based approaches are a promising tool in ecological monitoring and may perform better than taxonomy-based approaches. However only little is known how and which biological traits are affected by salinization. We investigated the Effects of anthropogenic salinization on macroinvertebrate communities and biological traits in the Werra River, Germany and compared the taxonomic and trait response.We found a change in macroinvertebrate community and trait composition. Communities at saline sites were characterized by the three exotic species Gammarus tigrinus, Apocorophium lacustre and Potamopyrgus antipodarum. The frequencies of trait modalities long life cycle duration, respiration by gill, ovoviviparity, shredder and multivoltinism were statistically significantly increased at saline sites.The trait-based ordination resulted in a higher explained variance than the taxonomy-based ordination, indicating a better performance of the trait-based approach, resulting in a better discrimination between saline and non-saline sites. Our results are in general agreement with other studies from Europe, indicating a trait convergence for saline streams, being dominated by the traits ovoviviparity and multivoltinism. Three further traits (respiration by gill, life cycle duration and shredders) responded strongly to salinization, but this may primarily be attributed to the dominance of a single invasive species, G. tigrinus, at the saline sites in the Werra River.
    Accepted: 19 August 2013
    Received: 5 June 2013
    Revised: 6 August 2013
    Tel: +?49 6341 280 31536
    Fax: +?49 6341 280 31326
    Email: szoe8822@uni

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