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Published September 24, 2018 | Version v1
Journal article Open

Future scenarios of marine resources and ecosystem conditions in the Eastern Mediterranean under the impacts of fishing, alien species and sea warming

  • 1. Kinneret Limnological Laboratory, Israel Oceanographic & Limnological Research, PO Box 447, Migdal, Israel; Institut de Ciències del Mar (ICM-CSIC), Passeig Marítim de la Barceloneta, n° 37–49, 08003, Barcelona, Spain.
  • 2. Institut de Ciències del Mar (ICM-CSIC), Passeig Marítim de la Barceloneta, n° 37–49, 08003, Barcelona, Spain; Ecopath International Initiative Research Association, Barcelona, Spain.
  • 3. Kinneret Limnological Laboratory, Israel Oceanographic & Limnological Research, PO Box 447, Migdal, Israel
  • 4. Scottish Association for Marine Science, Scottish Marine Institute, Oban, PA, 371QA, Scotland; European Marine Board, Wandelaarkaai 7, Oostende, 8400, Belgium.
  • 5. Institut de Ciències del Mar (ICM-CSIC), Passeig Marítim de la Barceloneta, n° 37–49, 08003, Barcelona, Spain; Ecopath International Initiative Research Association, Barcelona, Spain
  • 6. Department of Zoology and The Steinhardt Museum of Natural History, Tel Aviv University, Tel Aviv, 69978, Israel.
  • 7. Leon Recanati Institute for Marine Studies, Charney School for Marine Sciences, Faculty of Natural Sciences, University of Haifa, Mont Carmel, Haifa, 31905, Israel.

Description

Using a temporal-dynamic calibrated Ecosim food web model, we assess the effects of future changes on marine resources and ecosystem conditions of the Israeli Mediterranean continental shelf.

This region has been intensely invaded by Indo-Pacific species. The region is exposed to extreme environmental conditions, is subjected to high rates of climate change and has experienced intense fishing pressure. We test the impacts of a new set of fishing regulations currently being implemented, a continued increase in sea temperatures following IPCC projections, and a continued increase in alien species biomass. We first investigate the impacts of the stressors separately, and then we combine them to evaluate their cumulative effects. Our results show overall potential future benefits of fishing effort reductions, and detrimental impacts of increasing sea temperature and increasing biomass of alien species. Cumulative scenarios suggest that the beneficial effects of fisheries reduction may be dampened by the impact of increasing sea temperature and alien species when acting together. These results illustrate the importance of including stressors other than fisheries, such as climate change and biological invasions, in an ecosystem-based management approach. These results support the need for reducing local and regional stressors, such as fishing and biological invasions, in order to promote resilience to sea warming.

Notes

XC was supported by an IOLR scholarship under the DESSIM project ("A Decision Support System for the management of Israel's Mediterranean Exclusive Economic Zone"). MC was partially funded by the European Commission through the Marie Curie Career Integration Grant Fellowships – PCIG10-GA-2011-303534 - to the BIOWEB project. MC and JS were partially funded by the European Union's Horizon research program grant agreement No. 689518 for the MERCES project.

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Additional details

Funding

MERCES – Marine Ecosystem Restoration in Changing European Seas 689518
European Commission