Pedersen2017

Référence

Pedersen, E.J., Thompson, P.L., Ball, R.A., Fortin, M.-J., Gouhier, T.C., Link, H., Moritz, C., Nenzen, H., Stanley, R.R.E., Taranu, Z.E., Gonzalez, A., Guichard, F., Pepin, P. (2017) Signatures of the collapse and incipient recovery of an overexploited marine ecosystem. Royal Society Open Science, 4(7). (Scopus )

Résumé

The Northwest Atlantic cod stocks collapsed in the early 1990s and have yet to recover, despite the subsequent establishment of a continuing fishing moratorium. Efforts to understand the collapse and lack of recovery have so far focused mainly on the dynamics of commercially harvested species. Here, we use data from a 33-year scientific trawl survey to determine to which degree the signatures of the collapse and recovery of the cod are apparent in the spatial and temporal dynamics of the broader groundfish community. Over this 33-year period, the groundfish community experienced four phases of change: (i) a period of rapid, synchronous biomass collapse in most species, (ii) followed by a regime shift in community composition with a concomitant loss of functional diversity, (iii) followed in turn by periods of slow compositional recovery, and (iv) slow biomass growth. Our results demonstrate how a community-wide perspective can reveal new aspects of the dynamics of collapse and recovery unavailable from the analysis of individual species or a combination of a small number of species. Overall, we found evidence that such community-level signals should be useful for designing more effective management strategies to ensure the persistence of exploited marine ecosystems. © 2017 The Authors.

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@ARTICLE { Pedersen2017,
    AUTHOR = { Pedersen, E.J. and Thompson, P.L. and Ball, R.A. and Fortin, M.-J. and Gouhier, T.C. and Link, H. and Moritz, C. and Nenzen, H. and Stanley, R.R.E. and Taranu, Z.E. and Gonzalez, A. and Guichard, F. and Pepin, P. },
    TITLE = { Signatures of the collapse and incipient recovery of an overexploited marine ecosystem },
    JOURNAL = { Royal Society Open Science },
    YEAR = { 2017 },
    VOLUME = { 4 },
    NUMBER = { 7 },
    NOTE = { cited By 0 },
    ABSTRACT = { The Northwest Atlantic cod stocks collapsed in the early 1990s and have yet to recover, despite the subsequent establishment of a continuing fishing moratorium. Efforts to understand the collapse and lack of recovery have so far focused mainly on the dynamics of commercially harvested species. Here, we use data from a 33-year scientific trawl survey to determine to which degree the signatures of the collapse and recovery of the cod are apparent in the spatial and temporal dynamics of the broader groundfish community. Over this 33-year period, the groundfish community experienced four phases of change: (i) a period of rapid, synchronous biomass collapse in most species, (ii) followed by a regime shift in community composition with a concomitant loss of functional diversity, (iii) followed in turn by periods of slow compositional recovery, and (iv) slow biomass growth. Our results demonstrate how a community-wide perspective can reveal new aspects of the dynamics of collapse and recovery unavailable from the analysis of individual species or a combination of a small number of species. Overall, we found evidence that such community-level signals should be useful for designing more effective management strategies to ensure the persistence of exploited marine ecosystems. © 2017 The Authors. },
    AFFILIATION = { Department of Biology, McGill University, Montreal, QC, Canada; Center for Limnology, University of Wisconsin-Madison, Madison, WI, United States; Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada; Marine Science Center, Northeastern University, Nahant, MA, United States; Institute for Ecosystem Research, Kiel University, Kiel, Germany; PSL Research University: EPHE-UPVD-CNRS, USR 3278 CRIOBE, BP 1013 Papetoai, Moorea, French Polynesia; Laboratoire d'Excellence '˜CORAIL', Guadeloupe, France; Département des sciences biologiques, Université du Québec à Montréal, Montréal, QC, Canada; Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS, Canada; Département des sciences biologiques, Université de Montréal, Montréal, QC, Canada; Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, St John's, NL, Canada },
    ART_NUMBER = { 170215 },
    AUTHOR_KEYWORDS = { Community ecology; Community synchrony; Ecosystem-based management; Marine ecology; Regime shifts; Spatial ecology },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1098/rsos.170215 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021979474&doi=10.1098%2frsos.170215&partnerID=40&md5=ba5abbc03d33f547c97ac62ed1af5caf },
}

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