Pathogenic marine microbes influence the effects of climate change on a commercially important tropical bivalve

Turner, Lucy M.; Alsterberg, Christian; Turner, Andrew D.; Girisha, S.K.; Rai, Ashwin; Havenhand, Jonathan N.; Venugopal, M. N.; Karunasagar, Indrani; Godhe, Anna

doi:10.1038/srep32413

Cited by 25 publications

(21 citation statements)

References 54 publications

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“…The highest concentrations of toxins quantified reach approximately 10% of action limit, thereby representing a low overall risk to shellfish consumers based on the data generated in this study. The recent work of Turner et al, (2016), showed evidence for low PST uptake (maximum 31 µg STX eq/kg) in mussels in mesocosms containing Alexandrium minutum at 100,000 cells/L held at conditions (temperature 28 o C and 32 o C; salinity 35 PSU and 31 PSU) similar to the environmental conditions recorded in Mangalore during this study ( Table S1). The highest concentrations were determined in oysters from Mulki and Sasthana, in comparison to the mussels from Gangoli and Someshwar.…”

Section: Discussionsupporting

confidence: 72%

Assessing the presence of marine toxins in bivalve molluscs from southwest India

Turner

Dhanji‐Rapkova

Rowland-Pilgrim

et al. 2017

Toxicon

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The south west coast of India has been showing a steady increase in shellfish cultivation both for local consumption and fishery export, over recent years. Perna viridis and Crassostrea madrasensis are two species of bivalve molluscs which grow in some selected regions of southern Karnataka, close to the city of Mangalore. In the early 1980s, shellfish consumers in the region were affected by intoxication from Paralytic Shellfish Poison present in local bivalves (clams and oysters) resulting in hospitalisation of many, including one fatality. Since then, there have been no further reports of serious shellfish intoxication and there is little awareness of the risks from natural toxins and no routine monitoring programme in place to protect shellfish consumers. This study presents the findings from the first ever systematic assessment of the presence of marine toxins in mussels and oysters grown in four different shellfish harvesting areas in the region. Shellfish were collected and subjected to analysis for ASP, PSP and lipophilic toxins, as well as a suite of non-EU regulated toxins such as tetrodotoxin and selected cyclic imines. Results revealed the presence of low levels of PSP toxins in oysters throughout the study period. Overall, total toxicities reached a maximum of 10% of the EU regulatory limit of 800 μg STX eq/kg. Toxin profiles were similar to those reported from the 1980 outbreak. No evidence was found for significant levels of ASP and lipophilic toxins, although some cyclic imines were detected, including gymnodimine. The results indicated that the risk to shellfish consumers during this specific study period would have been low. However, with historical evidence for extremely high levels of PSP toxins in molluscs, there is a strong need for routine surveillance of shellfish production areas for marine toxins, in order to mitigate against human health impacts resulting from unexpected harmful algal blooms, with potentially devastating socio-economic consequences.

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Section: Discussionsupporting

confidence: 72%

Assessing the presence of marine toxins in bivalve molluscs from southwest India

Turner

Dhanji‐Rapkova

Rowland-Pilgrim

et al. 2017

Toxicon

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“…Climate change conditions have been reported experimentally to alter physiology of bivalves and interaction with HABs (Farrell et al, 2015;Turner et al, 2016). Therefore, the HABbivalve-pathogen interaction likely will evolve under future climate conditions.…”

Section: Discussion and Future Research Recommendationsmentioning

confidence: 99%

Effects of marine harmful algal blooms on bivalve cellular immunity and infectious diseases: A review

Lassudrie

Hégaret

Wikfors

et al. 2020

Developmental & Comparative Immunology

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Bivalves were long thought to be "symptomless carriers" of marine microalgal toxins to human seafood consumers. In the past three decades, science has come to recognize that harmful algae and their toxins can be harmful to grazers, including bivalves. Indeed, studies have shown conclusively that some microalgal toxins function as active grazing deterrents. When responding to marine Harmful Algal Bloom (HAB) events, bivalves can reject toxic cells to minimize toxin and bioactive extracellular compound (BEC) exposure, or ingest and digest cells, incorporating nutritional components and toxins. Several studies have reported modulation of bivalve hemocyte variables in response to HAB exposure. Hemocytes are specialized cells involved in many functions in bivalves, particularly in immunological defense mechanisms. Hemocytes protect tissues by engulfing or encapsulating living pathogens and repair tissue damage caused by injury, poisoning, and infections through inflammatory processes. The effects of HAB exposure observed on bivalve cellular immune variables have raised the question of possible effects on susceptibility to infectious disease. As science has described a previously unrecognized diversity in microalgal bioactive substances, and also found a growing list of infectious diseases in bivalves, episodic reports of interactions between harmful algae and disease in bivalves have been published. Only recently, studies directed to understand the physiological and metabolic bases of these interactions have been undertaken. This review compiles evidence from studies of harmful algal Highlights  Review of the main studies on effects of marine harmful algae on bivalve immune cells (hemocytes) and on infectious disease  Harmful algae can modulate host-pathogen interactions in bivalves on various way (increase or decrease the infection)  Some experimental studies report the involvement of cellular immunity and global physiological weakness in the modulations  Other mechanisms possibly involved: HAB effects on bivalve filtration; direct

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“…As similarly reported by participants in the NSF's IGERT program, benefits under the Gothenburg model have been tangible at the student, academic and institutional level (Carney et al, 2006). These benefits have included the successful completion of an interdisciplinary PhD thesis (Eriander, 2016), high impact disciplinespecific (e.g., Eriander et al, 2016;Infantes et al, 2016a, b;Kaur Kahlon et al, 2016;Turner et al, 2016;Kadfak and Knutsson, 2017) as well as interdisciplinary publications (Cole and Moksnes, 2016;Moksnes et al, 2016a, b), new successful interdisciplinary grant applications, and individual career progression.…”

Section: Discussionmentioning

confidence: 99%

“…In some sectors of the academic community suspicion of interdisciplinary working persists, with the notion often reported that this approach dilutes efforts away from the study of traditional disciplines (Rylance, 2015). At Gothenburg, while expanding our interdisciplinary pursuits, we have maintained our disciplinary integrities as evidenced by the publishing of intra-disciplinary studies (e.g., Eriander et al, 2016;Infantes et al, 2016a, b;Kaur Kahlon et al, 2016;Turner et al, 2016;Kadfak and Knutsson, 2017). When the Graduate School was established at Gothenburg we followed the same model as that underpinning the NSF's IGERT programs (Carney et al, 2006) with an emphasis on both interdisciplinary and intra-disciplinary outcomes.…”

Section: Discussionmentioning

confidence: 99%

Transporting ideas between marine and social sciences: experiences from interdisciplinary research programs

Turner

Bhatta²,

Eriander

et al. 2017

Elementa: Science of the Anthropocene

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The oceans comprise 70% of the surface area of our planet, contain some of the world’s richest natural resources and are one of the most significant drivers of global climate patterns. As the marine environment continues to increase in importance as both an essential resource reservoir and facilitator of global change, it is apparent that to find long-term sustainable solutions for our use of the sea and its resources and thus to engage in a sustainable blue economy, an integrated interdisciplinary approach is needed. As a result, interdisciplinary working is proliferating. We report here our experiences of forming interdisciplinary teams (marine ecologists, ecophysiologists,social scientists, environmental economists and environmental law specialists) to answer questions pertaining to the effects of anthropogenic-driven global change on the sustainability of resource use from the marine environment, and thus to transport ideas outwards from disciplinary confines. We use a framework derived from the literature on interdisciplinarity to enable us to explore processes of knowledge integration in two ongoing research projects, based on analyses of the purpose, form and degree of knowledge integration within each project. These teams were initially focused around a graduate program, explicitly designed for interdisciplinary training across the natural and social sciences, at the Gothenburg Centre for Marine Research at the University of Gothenburg, thus allowing us to reflect on our own experiences within the context of other multi-national,interdisciplinary graduate training and associated research programs.

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Pathogenic marine microbes influence the effects of climate change on a commercially important tropical bivalve

Cited by 25 publications

References 54 publications

Assessing the presence of marine toxins in bivalve molluscs from southwest India

Assessing the presence of marine toxins in bivalve molluscs from southwest India

Effects of marine harmful algal blooms on bivalve cellular immunity and infectious diseases: A review

Transporting ideas between marine and social sciences: experiences from interdisciplinary research programs

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