• Login
    About WHOAS
    View Item 
    •   WHOAS Home
    • USGS Woods Hole Coastal and Marine Science Center
    • Environmental Geoscience
    • View Item
    •   WHOAS Home
    • USGS Woods Hole Coastal and Marine Science Center
    • Environmental Geoscience
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of WHOASCommunities & CollectionsBy Issue DateAuthorsTitlesKeywordsThis CollectionBy Issue DateAuthorsTitlesKeywords

    My Account

    LoginRegister

    Statistics

    View Usage Statistics

    Groundfish overfishing, diatom decline, and the marine silica cycle : lessons from Saanich Inlet, Canada, and the Baltic Sea cod crash

    Thumbnail
    View/Open
    Article (1.043Mb)
    Figure S1: Infaunal abundance in the surface sediments of Saanich Inlet margins, Fraser Ridge (British Columbia), and two sites in Bonne Bay (Newfoundland). (12.97Kb)
    Figure S2: Infaunal abundance in fish excluding experiments in Patricia Bay, Saanich Inlet. (78.25Kb)
    Figure S3: DSi versus time in a benthic chamber during the in situ simulated resuspension experiment conducted in the northern Gulf of Aqaba, Red Sea. (18.48Kb)
    Movie S1: An Atlantic cod (Gadus morhua) resuspending sediment while chasing small fish at depth of 440 m in the North Sea. (12.56Mb)
    Movie S2: A slender sole (Lyopsetta exilis) at depth of 93 m in Saanich Inlet resuspends sediment when capturing overhead zooplankton and when emerging from the sediment. (30.65Mb)
    Movie S3: A spiny dogfish (Squalus acanthias) resuspending sediment while chasing a school of herring at depth of 95 m in Saanich Inlet. (10.87Mb)
    Movie S4: Goatfish resuspending sediment while searching for benthic invertebrates in the sandy seafloor in the Gulf of Aqaba. (36.26Mb)
    Additional file information (5.371Kb)
    Text S1: Description of a benthic chamber experiment in the northern Gulf of Aqaba and captions for Figures S1, S2, and S3. (84.23Kb)
    Text S1: Description of a benthic chamber experiment in the northern Gulf of Aqaba and captions for Figures S1, S2, and S3. (4.472Kb)
    Date
    2009-12-31
    Author
    Katz, Timor  Concept link
    Yahel, Gitai  Concept link
    Yahel, Ruthy  Concept link
    Tunnicliffe, Verena  Concept link
    Herut, Barak  Concept link
    Snelgrove, Paul V. R.  Concept link
    Crusius, John  Concept link
    Lazar, Boaz  Concept link
    Metadata
    Show full item record
    Citable URI
    https://hdl.handle.net/1912/3697
    As published
    https://doi.org/10.1029/2008GB003416
    DOI
    10.1029/2008GB003416
    Keyword
     Marine silica cycle; Groundfish activity; Sediments resuspension; Overfishing; Baltic Sea; Saanich Inlet 
    Abstract
    In this study, we link groundfish activity to the marine silica cycle and suggest that the drastic mid-1980s crash of the Baltic Sea cod (Gadus morhua) population triggered a cascade of events leading to decrease in dissolved silica (DSi) and diatom abundance in the water. We suggest that this seemingly unrelated sequence of events was caused by a marked decline in sediment resuspension associated with reduced groundfish activity resulting from the cod crash. In a study in Saanich Inlet, British Columbia, Canada, we discovered that, by resuspending bottom sediments, groundfish triple DSi fluxes from the sediments and reduce silica accumulation therein. Using these findings and the available oceanographic and environmental data from the Baltic Sea, we estimate that overfishing and recruitment failure of Baltic cod reduced by 20% the DSi supply from bottom sediments to the surface water leading to a decline in the diatom population in the Baltic Sea. The major importance of the marginal ocean in the marine silica cycle and the associated high population density of groundfish suggest that groundfish play a major role in the silica cycle. We postulate that dwindling groundfish populations caused by anthropogenic perturbations, e.g., overfishing and bottom water anoxia, may cause shifts in marine phytoplankton communities.
    Description
    Author Posting. © American Geophysical Union, 2009. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 23 (2009): GB4032, doi:10.1029/2008GB003416.
    Collections
    • Environmental Geoscience
    Suggested Citation
    Global Biogeochemical Cycles 23 (2009): GB4032
     

    Related items

    Showing items related by title, author, creator and subject.

    • Thumbnail

      Larval responses to turbulence and temperature in a tidal inlet: Habitat selection by dispersing gastropods? 

      Fuchs, Heidi L.; Solow, Andrew R.; Mullineaux, Lauren S. (Sears Foundation for Marine Research, 2010-06)
      Marine larval dispersal is affected by hydrodynamic transport and larval behavior, but little is known about how behavior affects large-scale patterns of dispersal and recruitment. Intertidal habitats are characterized by ...
    • Thumbnail

      Reducing effort in the U.S. American lobster (Homarus americanus) fishery to prevent North Atlantic right whale (Eubalaena glacialis) entanglements may support higher profits and long-term sustainability 

      Myers, Hannah J.; Moore, Michael J. (Woods Hole Oceanographic Institution, 2019-11-27)
      Supplemental data for Reducing effort in the U.S. American lobster (Homarus americanus) fishery to prevent North Atlantic right whale (Eubalaena glacialis) entanglements may support higher profits and long-term sustainability. ...
    • Thumbnail

      Reducing effort in the U.S. American lobster (Homarus americanus) fishery to prevent North Atlantic right whale (Eubalaena glacialis) entanglements may support higher profits and long-term sustainability 

      Myers, Hannah J.; Moore, Michael J. (2019-11)
      North Atlantic right whales (Eubalaena glacialis) feed and migrate in areas of the inshore and offshore trap fishery for American lobster (Homarus americanus) in the Northeast U.S. In addition to a recent increase in lethal ...
    All Items in WHOAS are protected by original copyright, with all rights reserved, unless otherwise indicated. WHOAS also supports the use of the Creative Commons licenses for original content.
    A service of the MBLWHOI Library | About WHOAS
    Contact Us | Send Feedback | Privacy Policy
    Core Trust Logo