The impact of dredging of a small lowland river on water beetle fauna (Coleoptera)

  • Piotr Dabkowski University of Szczecin, Poland.
  • Paweł Buczynski Maria Curie-Skłodowska University, Poland.
  • Andrzej Zawal | zawal@univ.szczecin.pl University of Szczecin, Poland.
  • Edyta Stepien University of Szczecin, Poland.
  • Edyta Buczynska University of Life Sciences, Poland.
  • Robert Stryjecki University of Life Sciences, Poland.
  • Stanislaw Czachorowski University of Warmia and Mazury in Olsztyn, Poland.
  • Przemyslaw Smietana University of Szczecin, Poland.
  • Magdalena Szenejko University of Szczecin, Poland.

Abstract

Using the example of a regulated stretch of the Krąpiel River (NW Poland), an analysis of the impact of dredging on the aquatic beetle (Coleoptera) fauna was made. After dredging the beetle fauna became markedly poorer quantitatively and had lower species diversity. Moreover, the qualitative composition and dominance structure were highly transformed. However, species number and diversity increased rapidly and were restored within just half a year. The structure of the restored fauna was most strongly influenced by vegetation, flow velocity and bottom sediment composition. The first to colonize the river were eurytopic beetles and species typical of small water bodies, which had significant refuges in the form of fish ponds bordering on the river; these species dominated the assemblage throughout the study period. Rheophiles with less dispersal power appeared later, and finally rheobionts, in low numbers but occupying an increasing number of sampling sites. 

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Published
2016-04-28
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Issue
Section
Original Articles
Supporting Agencies
Ministry of Science and Higher Education, no. N305 222537.
Keywords:
River regulation, biodiversity, reophilous species, stagnophilous species, environmental changes.
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How to Cite
1.
Dabkowski P, Buczynski P, Zawal A, Stepien E, Buczynska E, Stryjecki R, Czachorowski S, Smietana P, Szenejko M. The impact of dredging of a small lowland river on water beetle fauna (Coleoptera). J Limnol [Internet]. 2016Apr.28 [cited 2021May9];75(3). Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2016.1270