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Hydrobiologia

, Volume 474, Issue 1–3, pp 125–130 | Cite as

Field experiments on colonization and movements of stream invertebrates in an Apennine river (Visone, NW Italy)

  • Stefano Fenoglio
  • Paolo Agosta
  • Tiziano Bo
  • Marco Cucco
Article

Abstract

Macroinvertebrates continuously redistribute themselves in the riverbed. A knowledge of the colonization mechanisms and movement patterns is very important for an understanding of processes of restoration of lotic environments, particularly of inland waters with severe pollution. We tested the colonization patterns of stream macroinvertebrates in the Visone River, a tributary of the highly contaminated Bormida River (NW Italy). We placed six groups of traps in the riverbed, each group consisting of three traps: the C trap allowed colonization from all directions, while the D and U traps allowed access only from downstream and upstream respectively. The C traps were the most colonized substrates, both in number of individuals and taxa. The U traps were more colonized than the D traps, demonstrating the great importance of movements directed downstream. We report data on taxonomic and seasonal differences in the colonization process.

macroinvertebrates lotic environments recolonization movements 

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Copyright information

© Kluwer Academic Publishers 2002

Authors and Affiliations

  • Stefano Fenoglio
    • 1
  • Paolo Agosta
    • 1
  • Tiziano Bo
    • 1
  • Marco Cucco
    • 1
  1. 1.Dept. Sciences and Adv. Tech.University of Eastern PiedmontAlessandriaItaly

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