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Risky business: The combined effects of fishing and changes in primary productivity on fish communities
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10.1016:j.ecolmodel.2017.12.003.pdf
Date
2018-01-24
Author
FU, Caihong
TRAVERS-TROLET, Morgane
VELEZ, Laure
Gruss, Arnaud
BUNDY, Alida
Shannon, Lynne J.
FULTON, Elizabeth A.
Akoğlu, Ekin
HOULE, Jennifer E.
COLL, Marta
VERLEY, Philippe
HEYMANS, Johanna J.
John, Emma
SHIN, Yunne-Jai
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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There is an increasing need to understand ecosystem responses to multiple stressors in that such complex responses depend not only on species-level responses, but also on species interactions and ecosystem structure. In this study, we used a multi-model ecosystem simulation approach to explore the combined effects of fishing and primary productivity on different components of the food-web across a suite of ecosystems and a range of model types. Simulations were carried out under different levels of primary productivity and various fishing scenarios. In addition to exploring synergistic, additive or antagonistic combined effects of multiple stressors, we included a fourth category "dampened", which refers to less negative or less positive impacts compared to additive ones, and in contrast to previous studies, we explicitly considered the direction (positive or negative) of the combined effects. We focused on two specific combined effects (negative synergism and positive dampened) associated with the risk of resultant lower fish biomass than expected under additive effects. Through a meta-analysis of the multi models' simulation results, we found that (i) the risk of negative synergism was generally higher for low-trophic-level (LTL) taxa, implying that following an increase of fishing pressure on a given LTL stock, the subsequent decrease of biomass under low primary productivity would be larger than expected under additive effects and (ii) the risk of positive dampened effects was generally higher for high-trophic-level (HTL) taxa, implying that given a management measure aimed at reducing the impact of fishing on HTL stocks, the subsequent rebuilding of these stocks would be slower than expected. Our approach to categorizing and exploring cumulative effects can be applied to evaluate other community properties, and provide guidance for fisheries management. (C) 2017 The Authors. Published by Elsevier B.V.
Subject Keywords
Marine ecosystem
,
Fishing
,
Combined effect
,
Meta-analysis
,
Synergism
,
Multiple drivers
URI
https://hdl.handle.net/11511/30763
Journal
ECOLOGICAL MODELLING
DOI
https://doi.org/10.1016/j.ecolmodel.2017.12.003
Collections
Graduate School of Marine Sciences, Article
Citation Formats
IEEE
ACM
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CHICAGO
MLA
BibTeX
C. FU et al. , “Risky business: The combined effects of fishing and changes in primary productivity on fish communities,”
ECOLOGICAL MODELLING
, vol. 368, pp. 265–276, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30763.