, Volume 717, Issue 1, pp 147–159 | Cite as

Cascading effects of flow reduction on the benthic invertebrate community in a lowland river

  • Daniel GraeberEmail author
  • Martin T. Pusch
  • Stefan Lorenz
  • Mario Brauns
Primary Research Paper


Reduction of flow constitutes one of the most severe human alterations to rivers, as it affects the key abiotic feature of these ecosystems. While there has been considerable progress in understanding the effects of reduced flow on benthic macroinvertebrates, cascading effects of flow reduction on dissolved oxygen concentrations (DO) have not yet received much attention. We compared the macroinvertebrate composition between reference conditions and a situation after several years of discharge reduction in the Spree River (Brandenburg, Germany). Community composition shifted from rheophilic species to species indifferent to flow conditions. Filter feeders were partially replaced by collector/gatherers, which likely reduces the retention of organic matter, and thus the self-purification capacity of the river section. These shifts were associated with low discharge during summer, cascading into daily DO concentration minima of less than 5 mg l−1 which prevailed 74% of the days in summer. This depletion of DO after flow reduction presumably caused the observed species turnover. Hence, flow reduction in lowland rivers may not only directly impair the ecological functions provided by benthic macroinvertebrates but may also act indirectly by depleting DO concentrations.


Low flow Dissolved oxygen Discharge Functional feeding groups Flow preferences Spree River 



Thanks to Jürgen Schreiber, Jens Bunzel, Christina Taraschewski and Mark Leszinski for their assistance with the field and laboratory work and to Marianne Graupe, Barbara Meinck, Hannah Winckler and Grit Siegert for the seston measurements. We thank Jens Hürdler for precipitation modeling and the Environmental Agency of Brandenburg (Landesumweltamt Brandenburg) for providing the discharge data.

Supplementary material

10750_2013_1570_MOESM1_ESM.docx (208 kb)
Supplementary material 1 (DOCX 208 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Daniel Graeber
    • 1
    • 2
    Email author
  • Martin T. Pusch
    • 1
  • Stefan Lorenz
    • 1
  • Mario Brauns
    • 1
    • 3
  1. 1.Department of Ecosystem ResearchLeibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB)BerlinGermany
  2. 2.Department of BioscienceAarhus UniversitySilkeborgDenmark
  3. 3.Department of River EcologyHelmholtz Centre for Environmental Research GmbH-UFZMagdeburgGermany

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