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Corpus Systématique Animale

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Short-term recovery of benthos following disturbance from stream habitat rehabilitation

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  • stream rehabilitation
  • benthic macroinvertebrates
  • disturbance
  • recovery
Nom du fichier dans la ressource
  • Pertti Tikkanen 1
  • Pekka Laasonen 1
  • Timo Muotka 2
  • Arto Huhta 3
  • Kalevi Kuusela 1
  • 1) Department of Zoology, University of Oulu, 90570, Oulu, Finland
  • 2) Department of Biology, University of Jyväskylä, 90100, Jyväskylä, Finland
  • 3) Oulanka Biological Station, University of Oulu, 90570, Oulu, Finland

The recovery of benthic macroinvertebrates after disturbance from stream rehabilitation was studied in the River Livojoki, northern Finland. The stream that had been channelized for log transport was rehabilitated on 1 July 1992 by digging holes and inserting boulders. We measured habitat characteristics and sampled benthic animals before and after rehabilitation, including an unrehabilitated control site. The immediate effect of rehabilitation was a slight decrease in the abundances of benthic insects. Recolonization occurred rapidly, within 10 days. Disturbance of the rehabilitation did not have a detectable effect on the macroinvertebrate community. Most species-level changes and community patterns reflected seasonal life history events. Timing of such rehabilitation work can be critical for the recovery rate, which depends on the colonization abilities of the species present after disturbance. We suggest that many disturbances (including minor floods and moderate rehabilitation procedures) may have only small, short-term effects on benthic communities. We emphasize the importance of considering seasonality in studies of disturbance in streams.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
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