Complementarity and sensitivity of benthic state indicators to bottom-trawl fishing disturbance

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    Accepted author manuscript, 704 KB, PDF document

    Embargo ends: 12/10/25

DOI

  • P Daniël van Denderen
    Technical University of Denmark
  • Maider Plaza-Morlote
    IEO-COST (CSIC)
  • Sandrine Vaz
    MARBEC - Marine Biodiversity Exploitation and Conservation
  • Sander Wijnhoven
    Ecoauthor
  • Angel Borja
    AZTI, Spain
  • Ulla Fernandez-Arcaya
    IEO-COST (CSIC)
  • José M González-Irusta
    IEO-COST (CSIC)
  • Jørgen L S Hansen
    Aarhus University
  • Nikolaos Katsiaras
    Spanish Institute of Oceanography, Tenerife
  • Andrea Pierucci
    European Commission
  • Alberto Serrano
    IEO-COST (CSIC)
  • Sofia Reizopoulou
    Spanish Institute of Oceanography, Tenerife
  • Nadia Papadopoulou
    Institute of Marine Biological Resources and Inland Waters
  • Mattias Sköld
    Swedish University of Agricultural Sciences
  • Christopher J Smith
    Institute of Marine Biological Resources and Inland Waters
  • Henrik Nygård
    Finnish Environment Institute (SYKE), Helsinki
  • Gert Van Hoey
    Flanders Research Institute for Agriculture, Fisheries and Food
  • Grete E Dinesen
    Technical University of Denmark
  • Elina A Virtanen
    Finnish Environment Institute (SYKE), Helsinki
  • Aurélien Boyé
    IFREMER, Centre de Bretagne
  • Ana García-Alegre
    IEO-COST (CSIC)
  • Juan Bellas
    Centro Oceanográfico de Vigo
  • Stefan Bolam
    National Research Centre for the Working Environment, Copenhagen
  • Pablo Durán Muñoz
    Centro Oceanográfico de Vigo
  • Mar Sacau
    Centro Oceanográfico de Vigo
  • Giada Riva
    University of Padova
  • Ellen Kenchington
    Bedford Institute of Oceanography, Dartmouth, Nova Scotia
  • Saša Raicevich
    ISPRA - Istituto Superiore per la Protezione e la Ricerca Ambientale
  • David Reid
    Marine Institute
  • Marie Julie Roux
    Maurice-Lamontagne Research Institute
  • Jan Geert Hiddink
  • Sebastian Valanko
    International Council for the Exploration of the Sea, Copenhagen
Many indicators have been developed to assess the state of benthic communities and identify seabed habitats most at risk from bottom trawling disturbance. However, the large variety of indicators and their development and application under specific geographic areas and management contexts has made it difficult to evaluate their wider utility. We compared the complementarity/uniqueness, sensitivity, and selectivity of 18 benthic indicators to pressure of bottom trawling. Seventeen common datasets with broad regional representation covering a range of pressure gradients from bottom trawling disturbance (n = 14), eutrophication (n = 1), marine pollution (n = 1), and oxygen depletion (n = 1) were used for the comparison. The outcomes of most indicators were correlated to a certain extent with response to bottom trawling disturbance, and two complementary groups of indicators were identified: diversity-based and biological trait-based indicators. Trait-based indicators that quantify the changes in relative abundance of sensitive taxa were most effective in identifying benthic community change in response to bottom trawling disturbance. None of the indicators responded to the trawling pressure gradient in all datasets, and some showed a response that were opposed to the theoretical expectation for some gradients. Indicators that showed clear responses to bottom trawling disturbance also showed clear responses in at least one other pressure gradient, suggesting those indicators are not pressure specific. These results emphasize the importance of selecting several indicators, at least one from each group (diversity and trait-based), to capture the broader signals of change in benthic communities due to bottom trawling activities. Our systematic approach offers the basis from which scientific advisors and/or managers can select suitable combinations of indicators to arrive at a sensitive and comprehensive benthic status assessment.

Keywords

  • benthos, biological traits, good environmental state, infauna, seabed integrity, seafloor habitats, soft sediments
Original languageEnglish
Pages (from-to)e3050
JournalEcological Applications
Early online date12 Oct 2024
DOIs
Publication statusE-pub ahead of print - 12 Oct 2024
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