Journal
MARINE POLLUTION BULLETIN
Volume 44, Issue 6, Pages 511-519Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0025-326X(01)00264-8
Keywords
improvement; sewage; pollution; tidal flat ecosystem; Corophium salmonis; secondary production; Fraser river estuary; Canada; indicator species; amphipods; Crustacea
Ask authors/readers for more resources
Primary treated sewage effluent from the city of Vancouver, Canada was deposited directly onto the intertidal ecosystem of Sturgeon bank, Fraser river estuary between 1962 and 1988. In response to the degraded sediment conditions an azoic zone developed near the discharge outfall, Effluent discharges into the intertidal zone were almost completely stopped in 1988 with the construction of a Submerged outfall, Our studies. conducted between 1994 and 1996. showed considerable improvement in the environment of the mudflat ecosystem, including increased dissolved oxygen, decreased sediment chlorophyll, decreased organic material in the sediment, reduced heavy metals in surficial sediment and increased grain size. The amphipod Corophium salmonis, important in the food web for juvenile salmon and other fish species. recolonized the previously azoic location. At reference stations, C salmonis density was similar to that observed in previous surveys two decades earlier, Our data strongly suggest that improvement of sediment conditions near the former sewage outfall was a major factor enabling colonization by C salmonis. (C) 2002 Elsevier Science Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available