Responses of ecological indicators to fishing pressure under environmental change: exploring non-linearity and thresholds

Type Article
Date 2020-07
Language English
Author(s) Fu Caihong1, Xu Yi2, Grüss Arnaud3, Bundy Alida4, Shannon Lynne5, 6, Heymans Johanna J7, 8, Halouani GhassenORCID9, Akoglu Ekin10, Lynam Christopher P11, Coll Marta12, 13, Fulton Elizabeth A14, 15, Velez Laure16, Shin Yunne-Jai16
Affiliation(s) 1 : Pacific Biological Station, Fisheries and Oceans Canada, 3190 Hammond Bay Road, Nanaimo, BC V9T 6N7, Canada
2 : Fraser River and Interior Area Stock Assessment, Fisheries and Oceans Canada, 3-100 Annacis Parkway, Delta, BC V3M 6A2, Canada
3 : School of Aquatic and Fishery Sciences, University of Washington, Box 355020, Seattle, WA 98105-5020, USA
4 : Bedford Institute of Oceanography, Fisheries and Oceans Canada, PO Box 1006, Dartmouth, NS B2Y 4A2, Canada
5 : Department of Biological Sciences, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
6 : Marine Research Institute, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa
7 : European Marine Board, Wandelaarkaai 7, Oostende 8400, Belgium
8 : Scottish Association for Marine Science, Scottish Marine Institute, Oban, Argyll PA371QA, UK
9 : Marine and Freshwater Research Centre (MFRC), Galway-Mayo Institute of Technology (GMIT), Dublin Road, Galway, Ireland
10 : Institute of Marine Sciences, Middle East Technical University, PO Box 28, Erdemli 33731, Turkey
11 : Lowestoft Laboratory, Centre for Environment, Fisheries and Aquaculture Science (Cefas), Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK
12 : Institute of Marine Science (ICM-CSIC), Passeig Maritim de la Barceloneta, n° 37-49, 08003 Barcelona, Spain
13 : Ecopath International Initiative Research Association, Mestre Nicolau 8, Bellaterra, 08193 Barcelona, Spain
14 : CSIRO Oceans & Atmosphere, GPO Box 1538, Hobart, TAS 7001, Australia
15 : Centre for Marine Socioecology, University of Tasmania, Hobart, TAS 7000, Australia
16 : Institut de Recherche pour le Développement, MARBEC (IRD, University Montpellier, Ifremer, CNRS), Montpellier, France
Source Ices Journal Of Marine Science (1054-3139) (Oxford University Press (OUP)), 2020-07 , Vol. 77 , N. 4 , P. 1516-1531
DOI 10.1093/icesjms/fsz182
WOS© Times Cited 21
Keyword(s) ecosystem-based fisheries management, generalized additive model, marine ecosystem model, non-linear response, primary productivity

Marine ecosystems are influenced by multiple stressors in both linear and non-linear ways. Using generalized additive models (GAMs) fitted to outputs from a multi-ecosystem, multi-model simulation experiment, we investigated 14 major ecological indicators across ten marine ecosystems about their responses to fishing pressure under: (i) three different fishing strategies (focusing on low-, high-, or all-trophic-level taxa); and (ii) four different scenarios of directional or random primary productivity change, a proxy for environmental change. From this work, we draw four major conclusions: (i) responses of indicators to fishing mortality in shapes, directions, and thresholds depend on the fishing strategies considered; (ii) most of the indicators demonstrate decreasing trends with increasing fishing mortality, with a few exceptions depending on the type of fishing strategy; (iii) most of the indicators respond to fishing mortality in a linear way, particularly for community and biomass-based indicators; and (iv) occurrence of threshold for non-linear-mixed type (i.e. non-linear with inflection points) is not prevalent within the fishing mortality rates explored. The conclusions drawn from the present study provide a knowledge base in indicators’ dynamics under different fishing and primary productivity levels, thereby facilitating the application of ecosystem-based fisheries management worldwide.

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Fu Caihong, Xu Yi, Grüss Arnaud, Bundy Alida, Shannon Lynne, Heymans Johanna J, Halouani Ghassen, Akoglu Ekin, Lynam Christopher P, Coll Marta, Fulton Elizabeth A, Velez Laure, Shin Yunne-Jai (2020). Responses of ecological indicators to fishing pressure under environmental change: exploring non-linearity and thresholds. Ices Journal Of Marine Science, 77(4), 1516-1531. Publisher's official version : , Open Access version :