GlobalHAB: Fostering International Coordination on Harmful Algal Bloom Research in Aquatic Systems

Berdalet, Elisa; Kudela, Raphael M.; Banas, Neil S.; Bresnan, Eileen; Burford, Michele A.; Davidson, Keith; Gobler, Christopher J.; Karlson, Bengt; Lim, Po Teen; MacKenzie, Lincoln; Montresor, Marina; Trainer, Vera L.; Usup, Gires; Yin, Kedong; Enevoldsen, Henrik; Urban, Ed

doi:10.1007/978-3-319-70069-4_22

Cited by 12 publications

(13 citation statements)

References 72 publications

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“…In fact, in our previous work, we detected the presence of Microcystis with the potential of microcystins production in all sampled fishponds in Israel (Marmen et al, 2016). Such blooms are also common elsewhere in the world (Berdalet et al, 2018;Paerl and Paul, 2012;Zimba et al, 2001). However, in this study there were times during which, based on the 16S rRNA amplicons, Microcystis was almost absent, yet microcystins were present in the water.…”

Section: Cyanobacterial Blooms As Major Seasonal Occurrences In Aquacmentioning

confidence: 55%

Seasonal dynamics are the major driver of microbial diversity and composition in intensive freshwater aquaculture

Marmen

Fadeev

Al-Ashhab

et al. 2021

Preprint

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Aquaculture facilities such as fishponds are one of the most anthropogenically impacted freshwater ecosystems. The high fish biomass reared in aquaculture is associated with an intensive input into the water of fish-feed and fish excrements. This nutrients load may affect the microbial community in the water, which in turn can impact the fish health. To determine to what extent aquaculture practices and natural seasonal cycles affect the microbial populations, we characterized the microbiome of an inter-connected aquaculture system at monthly resolution, over three years. The system comprised two fishponds, where fish are grown, and a "control" operational water reservoir in which fish are not actively stocked. Clear natural seasonal cycles of temperature and inorganic nutrients concentration, as well as recurring cyanobacterial blooms during summer, were observed in both the fishponds and the reservoir. The structure of the aquatic bacterial communities in the system, characterized using 16S rRNA sequencing, was explained primarily by the natural seasonality, whereas aquaculture-related parameters had only a minor explanatory power. However, the cyanobacterial blooms were characterized by different cyanobacterial clades dominating at each fishpond, possibly in response to distinct nitrogen and phosphate ratios. In turn, nutrient ratios may have been by the magnitude of fish feed input. Taken together, our results show that, even in strongly anthropogenically impacted aquatic ecosystems, the structure of bacterial communities is mainly driven by the natural seasonality, with more subtle effects if aquaculture-related factors.

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Section: Cyanobacterial Blooms As Major Seasonal Occurrences In Aquacmentioning

confidence: 55%

Seasonal dynamics are the major driver of microbial diversity and composition in intensive freshwater aquaculture

Marmen

Fadeev

Al-Ashhab

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…In fact, in our previous work, we detected the presence of Microcystis with the potential of microcystins production in all sampled fishponds in Israel ( Marmen et al, 2016 ). Such blooms are also common elsewhere in the world ( Zimba et al, 2001 ; Paerl and Paul, 2012 ; Berdalet et al, 2018 ). However, in this study there were times during which, based on the 16S rRNA amplicons, Microcystis was almost absent, yet microcystins were present in the water.…”

Section: Discussionmentioning

confidence: 99%

Seasonal Dynamics Are the Major Driver of Microbial Diversity and Composition in Intensive Freshwater Aquaculture

et al. 2021

View full text Add to dashboard Cite

Aquaculture facilities such as fishponds are one of the most anthropogenically impacted freshwater ecosystems. The high fish biomass reared in aquaculture is associated with an intensive input into the water of fish-feed and fish excrements. This nutrients load may affect the microbial community in the water, which in turn can impact the fish health. To determine to what extent aquaculture practices and natural seasonal cycles affect the microbial populations, we characterized the microbiome of an inter-connected aquaculture system at monthly resolution, over 3 years. The system comprised two fishponds, where fish are grown, and an operational water reservoir in which fish are not actively stocked. Clear natural seasonal cycles of temperature and inorganic nutrients concentration, as well as recurring cyanobacterial blooms during summer, were observed in both the fishponds and the reservoir. The structure of the aquatic bacterial communities in the system, characterized using 16S rRNA sequencing, was explained primarily by the natural seasonality, whereas aquaculture-related parameters had only a minor explanatory power. However, the cyanobacterial blooms were characterized by different cyanobacterial clades dominating at each fishpond, possibly in response to distinct nitrogen and phosphate ratios. In turn, nutrient ratios may have been affected by the magnitude of fish feed input. Taken together, our results show that, even in strongly anthropogenically impacted aquatic ecosystems, the structure of bacterial communities is mainly driven by the natural seasonality, with more subtle effects of aquaculture-related factors.

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“…However, domestic solutions are insufficient for this transnational global seafood-related human health problem. A problem that necessitates a multi-disciplinary effort involving scientists, consumers, governments, human health experts, and fishers; working together with a dedicated approach for capacity building, willingness to provide technology and knowledge transfer and to share research material to truly address the remaining challenges of CP [ 11 , 16 , 66 , 67 , 68 , 69 , 70 , 71 ].…”

Section: Introductionmentioning

confidence: 99%

Ciguatera Mini Review: 21st Century Environmental Challenges and the Interdisciplinary Research Efforts Rising to Meet Them

Loeffler

Tartaglione

Friedemann

et al. 2021

IJERPH

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Globally, the livelihoods of over a billion people are affected by changes to marine ecosystems, both structurally and systematically. Resources and ecosystem services, provided by the marine environment, contribute nutrition, income, and health benefits for communities. One threat to these securities is ciguatera poisoning; worldwide, the most commonly reported non-bacterial seafood-related illness. Ciguatera is caused by the consumption of (primarily) finfish contaminated with ciguatoxins, potent neurotoxins produced by benthic single-cell microalgae. When consumed, ciguatoxins are biotransformed and can bioaccumulate throughout the food-web via complex pathways. Ciguatera-derived food insecurity is particularly extreme for small island-nations, where fear of intoxication can lead to fishing restrictions by region, species, or size. Exacerbating these complexities are anthropogenic or natural changes occurring in global marine habitats, e.g., climate change, greenhouse-gas induced physical oceanic changes, overfishing, invasive species, and even the international seafood trade. Here we provide an overview of the challenges and opportunities of the 21st century regarding the many facets of ciguatera, including the complex nature of this illness, the biological/environmental factors affecting the causative organisms, their toxins, vectors, detection methods, human-health oriented responses, and ultimately an outlook towards the future. Ciguatera research efforts face many social and environmental challenges this century. However, several future-oriented goals are within reach, including digital solutions for seafood supply chains, identifying novel compounds and methods with the potential for advanced diagnostics, treatments, and prediction capabilities. The advances described herein provide confidence that the tools are now available to answer many of the remaining questions surrounding ciguatera and therefore protection measures can become more accurate and routine.

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GlobalHAB: Fostering International Coordination on Harmful Algal Bloom Research in Aquatic Systems

Cited by 12 publications

References 72 publications

Seasonal dynamics are the major driver of microbial diversity and composition in intensive freshwater aquaculture

Seasonal dynamics are the major driver of microbial diversity and composition in intensive freshwater aquaculture

Seasonal Dynamics Are the Major Driver of Microbial Diversity and Composition in Intensive Freshwater Aquaculture

Ciguatera Mini Review: 21st Century Environmental Challenges and the Interdisciplinary Research Efforts Rising to Meet Them

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