Variability of planktonic and epiphytic vibrios in a coastal environment affected by &lt;em&gt;Ostreopsis&lt;/em&gt; blooms

Bellés-Garulera, Judit; Vila, Magda; Borrull, Encarna; Riobó, Pilar; Franco, José M.; Sala, M. Montserrat

doi:10.3989/scimar.04405.01a

Cited by 17 publications

(10 citation statements)

References 66 publications

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“…However, the absolute abundance of free-living Vibrio was higher than that of particle-associated Vibrio (Wilcoxon, P Ͻ 0.001), suggesting that more Vibrio populations remained free living rather than particle associated. This result was in line with the results of studies in several other regions, including the Baltic and Skagerrak Seas, as well as the Mediterranean (30,38). Based on these results, it can be assumed that although Vibrio has certain advantages over other bacteria when attached to particles, it is more inclined to live freely in the water column.…”

Section: Discussionsupporting

confidence: 89%

Spatiotemporal Dynamics of Free-Living and Particle-Associated Vibrio Communities in the Northern Chinese Marginal Seas

Liang

Liu

Wang

et al. 2019

Appl Environ Microbiol

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Vibrio species are associated with human health and play important roles in the carbon cycle. The interest in the Vibrio ecology in marine pelagic environments has increased in recent years, and the correlations between the Vibrio community structure and various environmental factors have been demonstrated. However, the identification of planktonic Vibrio species and their relationship with particulate matter are unclear. Here, we elucidated the spatiotemporal dynamics of Vibrio diversity and in relation to environmental factors in the northern Chinese marginal seas, which feature complex and ever-changing environmental conditions. Vibrio abundance derived from quantitative PCR analysis was higher in summer (∼1.4 × 106 copies liter−1) than in winter (∼1.9 × 105 copies liter−1). Interestingly, the average amount of free-living (on a 0.22-μm-pore-size filter membrane) Vibrio was higher (∼3.89 times) than that of particle-associated Vibrio (on a 3-μm-pore-size filter membrane), making it likely that the preferential lifestyle of the planktonic Vibrio community was free living. Shifts in Vibrio community composition identified by high-throughput amplicon sequencing of the Vibrio-specific 16S rRNA gene were observed at both spatial and temporal scales, which were mainly driven by temperature, dissolved oxygen, ammonium, salinity, nitrite, and phosphate. The most prominent operational taxonomic units in summer were closely related to Vibrio campbellii and Vibrio caribbeanicus and shifted to those affiliated with Vibrio atlanticus in winter. Our study demonstrated abundant and diverse Vibrio populations in the northern Chinese marginal seas, contributing to a better understanding of their potential ecological roles in these ecosystems. IMPORTANCE The dynamics of Vibrio communities have been shown in many marine habitats that are close to land, including estuary or harbor areas. Here, we investigated the spatiotemporal dynamics of Vibrio populations in the northern Chinese marginal seas, spanning a wide spatial scale. We showed that the abundances of the Vibrio population in the present study were higher than those in most previously studied areas and that Vibrio species are more likely to adopt a free-living lifestyle. Moreover, our results expanded upon previous results by showing a clear shift in the dominant Vibrio species from summer to winter, which was mainly attributable to the reduction in the abundance of dominant species in summer. Overall, this work contributes to the understanding of the ecology of the Vibrio communities in the marginal seas.

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Section: Discussionsupporting

confidence: 89%

Spatiotemporal Dynamics of Free-Living and Particle-Associated Vibrio Communities in the Northern Chinese Marginal Seas

Liang

Liu

Wang

et al. 2019

Appl Environ Microbiol

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“…Another aspect to consider in the many facets of the toxicity attributed to Ostreopsis is the role of certain bacteria such as Vibrio, some of which are known to be responsible for wound infections in people swimming in marine waters. Bellés-Garulera et al (2016) found a positive correlation between Vibrio and Ostreopsis abundances in Sant Andreu de Llavaneres during a year cycle, and suggested a likely role of vibrios in injury infections suffered by beach users during the bloom. Future research should combine ecophysiological, toxicological and environmental (water and weather conditions) data and characterizations of the Ostreopsis blooms to unveil the important factors and mechanisms of the impact on human health.…”

Section: Discussionmentioning

confidence: 99%

Establishing the link between <em>Ostreopsis</em> cf.<em>ovata</em> blooms and human health impacts using ecology and epidemiology

Vila¹,

Abós‐Herràndiz²,

Isern‐Fontanet³

et al. 2016

Sci. Mar.

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Summary:Blooms of the benthic dinoflagellate Ostreopsis have been related to sporadic acute respiratory symptoms and general malaise in people exposed to marine aerosols on some Mediterranean beaches. However, the direct link between recurrent Ostreopsis blooms and health problems has not been clearly established. In order to establish and elucidate the connection, we conducted a joint ecology and epidemiology study in an Ostreopsis hot spot. Throughout the bloom, which extended from the end of June until the end of October 2013, 81% of the human cohort that we studied experienced at least one Ostreopsis-related symptom. Paradoxically, the time when the effects were greatest was during a short time window in early August. This corresponded to the transition from the exponential growth to the stationary phase of the bloom. Negligible symptoms were reported from August to mid-October, during the stationary period of the proliferation, when O. cf. ovata maintained high concentrations of epiphytic cells. No clear patterns in the landward wind component were noted during the time when health effects were greatest. Our main hypothesis is that the irritants present in the aerosol are produced during a particular physiological phase of the Ostreopsis cells during the bloom.Keywords: Ostreopsis, epidemiology, Mediterranean, HAB, dinoflagellates, respiratory irritation.Aproximación ecológica y epidemiológica para establecer la relación entre las proliferaciones de Ostreopsis cf. ovata y sus impactos sobre la salud humana Resumen: Las proliferaciones del dinoflagelado bentónico Ostreopsis en algunas playas del Mediterráneo se han relacionado con síntomas respiratorios agudos esporádicos y malestar general en las personas expuestas a los aerosoles marinos. Sin embargo, la relación directa entre las proliferaciones recurrentes de Ostreopsis y los problemas en la salud no ha sido claramente establecida. Con el fin de establecer esta conexión se realizó un estudio ecológico y epidemiológico conjunto en una playa afectada por dichos eventos. A lo largo de la proliferación, que se extendió desde finales de junio hasta finales de octubre de 2013, el 81% de la cohorte humana estudiada presentó al menos un síntoma relacionado con los potencialmente producidos por Ostreopsis. Paradójicamente, la mayoría de los efectos se produjeron durante un breve período de tiempo, a principios de agosto, coincidiendo con la transición de la fase de crecimiento exponencial de la proliferación a la fase estacionaria. A partir de agosto y hasta mediados de octubre, durante dicha fase estacionaria en que se mantuvieron concentraciones elevadas de O. cf. ovata, los síntomas fueron negligibles. Durante el período de tiempo con mayor afectación en la salud, no se observó un patrón claro en la componente de viento de mar hacia tierra. Nuestra hipótesis principal es que los compuestos irritantes presentes en el aerosol se producen durante una fase fisiológica particular de las células de Ostreopsis en un momento concreto de la proliferación.Palabras clave...

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“…The mucilage, rich in organic carbohydrates, appears also as biologically colonizable surface for the growth of some bacteria (Vanucci et al, 2016;Guidi et al, 2018) including Vibrio (Bellés-Garulera et al, 2016). This positive association for pathogenic bacteria increases the risk of health impacts posed by Ostreopsis to human populations.…”

Section: Importance Of the Mucus In Ostreopsis Biological Interactionsmentioning

confidence: 99%

Chemical Ecology of the Benthic Dinoflagellate Genus Ostreopsis: Review of Progress and Future Directions

2020

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Variability of planktonic and epiphytic vibrios in a coastal environment affected by <em>Ostreopsis</em> blooms

Cited by 17 publications

References 66 publications

Spatiotemporal Dynamics of Free-Living and Particle-Associated Vibrio Communities in the Northern Chinese Marginal Seas

Spatiotemporal Dynamics of Free-Living and Particle-Associated Vibrio Communities in the Northern Chinese Marginal Seas

Establishing the link between <em>Ostreopsis</em> cf.<em>ovata</em> blooms and human health impacts using ecology and epidemiology

Chemical Ecology of the Benthic Dinoflagellate Genus Ostreopsis: Review of Progress and Future Directions

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