Sensitivity of Mediterranean Bivalve Mollusc Aquaculture to Climate Change, Ocean Acidification, and Other Environmental Pressures: Findings from a Producer Survey

Rodrigues, Luís C.; Bergh, J.C.J.M. van den; Massa, Fabio; Theodorou, John Α.; Ziveri, Patrizia; Gazeau, Frédéric

doi:10.2983/035.034.0341

Cited by 47 publications

(36 citation statements)

References 40 publications

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“…This signal is stronger in the shallowest portion (0-20 m) of the water column, but along the eastern coasts of the Levantine Basin this effect is still evident down to about 40 m depth. Figure 4 shows the change in number of sites at all considered depths, for either C. rubrum presence records (Harmelin, 2006) or mussel culture facilities (location points from Rodrigues et al, 2015), where at least one of the considered MHWs occurred. As our focus is on low motility (benthic) species, our maps are relevant just for a narrow strip along the coastline, however we choose to retain also the open sea for readers that might be interested in the epipelagic environment.…”

Section: Change In Temperature Regimes In the Mediterranean Seamentioning

confidence: 99%

“…A questionnaire-based study of Mediterranean mollusc producers (Rodrigues et al, 2015) from 12 coastal regions and 6 countries highlighted how episodes of partial or total mortality related to high water temperature are currently widespread; other studies (Anestis et al, 2007(Anestis et al, , 2010Gazeau et al, 2014) identified the threshold of 25 • C as critical for mussels physiological activities, indicating that Mediterranean mussels may already live close to their physiological limits.…”

Section: Introductionmentioning

confidence: 99%

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Marine Heat Waves Hazard 3D Maps and the Risk for Low Motility Organisms in a Warming Mediterranean Sea

2017

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Frequency and severity of heat waves is expected to increase as a consequence of climate change with important impacts on human and ecosystems health. However, while many studies explored the projected occurrence of hot extremes on terrestrial systems, few studies dealt with marine systems, so that both the expected change in marine heat waves occurrence and the effects on marine organisms and ecosystems remain less understood and surprisingly poorly quantified. Here we: (i) assess how much more frequent, severe, and depth-penetrating marine heat waves will be in the Mediterranean area in the next decades by post-processing the output of an ocean general circulation model; and (ii) show that heat waves increase will impact on many species that live in shallow waters and have reduced motility, and related economic activities. This information is made available also as a dataset of temperature threshold exceedance indexes that can be used in combination with biological information to produce risk assessment maps for target species or biomes across the whole Mediterranean Sea. As case studies we compared projected heat waves occurrence with thermotolerance thresholds of low motility organisms. Results suggest a deepening of the survival horizon for red coral (Corallium rubrum, a commercially exploited benthic species already subjected to heat-related mass mortality events) and coralligenous reefs as well as a reduction of suitable farming sites for the mussel Mythilus galloprovincialis. In recent years Mediterranean circalittoral ecosystems (coralligenous) have been severely and repeatedly impacted by marine heat waves. Our results support that equally deleterious events are expected in the near future also for other ecologically important habitats (e.g., seagrass meadows) and aquaculture activities (bivalvae), and point at the need for mitigation strategies.

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Section: Change In Temperature Regimes In the Mediterranean Seamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Marine Heat Waves Hazard 3D Maps and the Risk for Low Motility Organisms in a Warming Mediterranean Sea

2017

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“…Various causes have been identified for MMB outbreaks, including: high sea temperatures and heat waves (Cheney et al 2000, Ortega et al 2012, Rodrigues et al 2015; changes in salinity (Xiao et al 2005), turbidity, and pH; high primary production (Cheney et al 2000, Mydlarz et al 2006; eutrophic waters (Friedman and Hedrick 1991); invasive species as competitors or predators (Matsuyama 1999, McKindsey et al 2007; pathogens (Elston et al 1987); and density-dependent factors (Brazeiro andDefeo 1999, Xiao et al 2005).…”

Section: Review Of Literaturementioning

confidence: 99%

A comparative appraisal of the resilience of marine social-ecological systems to mass mortalities of bivalves

Guillotreau¹,

Allison²,

Bundy³

et al. 2017

E&S

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ABSTRACT. In many parts of the world, both wild and cultured populations of bivalves have been struck by mass mortality episodes because of climatic and anthropogenic stressors whose causes and consequences are not always clearly understood. Such outbreaks have resulted in a range of responses from the social (fishers or farmers) and governing systems. We analyzed six commercial bivalve industries affected by mass mortalities using I-ADApT, a decision support framework to assess the impacts and consequences of these perturbations on the natural, social, and governing systems, and the consequent responses of stakeholders to these events. We propose a multidimensional resilience framework to assess resilience along the natural, social, and governing axes and to compare adaptive responses and their likelihood of success. The social capital and governability of the local communities were key factors affecting the communities' resilience and adaptation to environmental changes, but the rapid degradation of natural ecosystems puts the bivalve industry under a growing threat. Bivalve mariculture and fishing industries are likely to experience increased frequency, severity, and prevalence of such mass mortality events if the resilience of the natural systems is not improved. An understanding of previous adaptation processes can inform strategies for building adaptive capacity to future events.

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“…Although temperature will not be the only change to impact bivalves, it has been shown to be the most deterministic factor influencing shellfish growth and distribution, and is one of the most widely studied abiotic factors related to climate change (Zippay and Helmuth, 2012;Rodrigues et al, 2015;Buckley and Huey, 2016;Filgueira et al, 2016). Warming oceans are modifying current natural ranges of many marine species (e.g., Diederich et al, 2005;Jones et al, 2009Jones et al, , 2010Rinde et al, 2016;Shelmerdine et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Past, Present, and Future: Performance of Two Bivalve Species Under Changing Environmental Conditions

et al. 2018

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Globally, the production of marine bivalves has been steadily increasing over the past several decades. As the effects of human population growth are magnified, bivalves help provide food security as a source of inexpensive protein. However, as climate change alters sea surface temperatures (SST), the physiology, and thus the survival, growth, and distribution of bivalves are being altered. Challenges with managing bivalves may become more pronounced, as the uncertainty associated with climate change makes it difficult to predict future production levels. Modeling techniques, applied to both climate change and bivalve bioenergetics, can be used to predict and explore the impacts of changing ocean temperatures on bivalve physiology, and concomitantly on aquaculture production. This study coupled a previously established high resolution climate model and two dynamic energy budget models to explore the future growth and distribution of two economically and ecologically important species, the eastern oyster (Crassotrea virginica), and the blue mussel (Mytilus edulis) along the Atlantic coast of Canada. SST was extracted from the climate model and used as a forcing variable in the bioenergetic models. This approach was applied across three discreet time periods: the past (1986)(1987)(1988)(1989)(1990), the present (2016)(2017)(2018)(2019)(2020), and the future (2046-2050), thus permitting a comparison of bivalve performance under different temporal scenarios. Results show that the future growth is variable both spatially and interspecifically. Modeling outcomes suggest that warming ocean temperatures will cause an increase in growth rates of both species as a result of their ectothermic nature. However, as the thermal tolerance of C. virginica is higher than M. edulis, oysters will generally outperform mussels. The predicted effects of temperature on bivalve physiology also provided insight into vulnerabilities (e.g., mortality) under future SST scenarios. Such information is useful for adapting future management strategies for both farmed and wild shellfish. Although this study focused on a geographically specific area, the approach of coupling bioenergetic and climate models is valid for species and environments across the globe.

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Sensitivity of Mediterranean Bivalve Mollusc Aquaculture to Climate Change, Ocean Acidification, and Other Environmental Pressures: Findings from a Producer Survey

Cited by 47 publications

References 40 publications

Marine Heat Waves Hazard 3D Maps and the Risk for Low Motility Organisms in a Warming Mediterranean Sea

Marine Heat Waves Hazard 3D Maps and the Risk for Low Motility Organisms in a Warming Mediterranean Sea

A comparative appraisal of the resilience of marine social-ecological systems to mass mortalities of bivalves

Past, Present, and Future: Performance of Two Bivalve Species Under Changing Environmental Conditions

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