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Sediment Dynamics for a Changing Future (Proceedings of the ICCE symposium held at Warsaw University of Life Sciences -SGGW, Poland, 1418 June 2010). IAHS Publ. 337, 2010.
 

Summary: Sediment Dynamics for a Changing Future (Proceedings of the ICCE symposium held at
Warsaw University of Life Sciences - SGGW, Poland, 1418 June 2010). IAHS Publ. 337, 2010.
251
Salmon as biogeomorphic agents: temporal and spatial effects
on sediment quantity and quality in a northern British
Columbia spawning channel
ELLEN L. PETTICREW & SAM J. ALBERS
University of Northern British Columbia, Geography Program, 3333 University Way, Prince George,
British Columbia V2N 4Z9, Canada
ellen@unbc.ca
Abstract Pacific salmon have a large biogeomorphic impact on their natal streams. An opportunity to utilize
a regulated salmon spawning channel in the summer of 2009 allowed a temporal and spatial evaluation of
the biologic and geomorphic effects of salmon spawning on fine sediment infiltration into gravel bed
streams. These salmon transfer biologically valuable marine-derived nutrients upstream to their natal
habitats, while at the same time imparting energy to the streambed via their spawning activity, thereby
modifying the geomorphic conditions. Fine sediment infiltration rates were used to monitor the physical
activity of redd construction, and the biological effects of die-off on the gravel bed. Infiltration bags and
piezometers were used to determine the mass of sediment deposited on and in the streambed, and the oxygen
content of the gravel bed, respectively. Sedimentation increased during the period of active redd
construction while the proportion of organic matter in the gravel-stored sediment increased following the

  

Source: Aukema, Brian - ukema, Brian - Canadian Forest Service & Ecosystem Science and Management Program, University of Northern British Columbia

 

Collections: Environmental Sciences and Ecology