Ostreospis cf. ovata blooms in coastal water: Italian guidelines to assess and manage the risk associated to bathing waters and recreational activities

Funari, Enzo; Manganelli, Maura; Testai, Emanuela

doi:10.1016/j.hal.2015.10.008

Cited by 30 publications

(32 citation statements)

References 86 publications

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“…Because beach closures could have had associated negative impacts on tourism-related social and economic activities, prohibitions were subsequently replaced by preventive alerts and by increased public information about the risk of exposure. These management strategies were recently published in Italian guidelines (Funari et al 2015). In our study, the main period of effect in August coincided with the highest Ostreopsis concentrations recorded in the plankton, above 10 4 cells L -1 , and with constant concentrations of around 10 5 cells g -1 FW in the benthos.…”

Section: Discussionsupporting

confidence: 62%

“…In our view, any Ostreopsis-related alert risks should be based on both the benthic and planktonic cell abundances. Until now, a threshold of 30000 cells L -1 in the water has been used to define the alert risk in some Mediterranean areas (International Conference on Ostreopsis Development, ICOD 2012, round table discussion; Funari et al 2015) provided that meteorological and hydrodynamic conditions are favourable to aerosol and spray formation. Above this value, prohibition of beach access and bathing has been recommended by authorities in France.…”

Section: Discussionmentioning

confidence: 99%

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Establishing the link between Ostreopsis cf.ovata 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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Section: Discussionsupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

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

Vila¹,

Abós‐Herràndiz²,

Isern‐Fontanet³

et al. 2016

Sci. Mar.

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“…Despite the toxins having been found in marine fauna in the Mediterranean, seafood-borne poisonings have not yet been reported in this area. So far, Ostreopsis blooms have only caused touristic impacts in the Mediterranean (Funari et al, 2015). However, the toxins have been rarely detected in the air (Ciminiello et al, 2014), while the presence of cell debris in the aerosol were confirmed by combining Scanning Electron Microscope and PCR (Casabianca et al, 2013).…”

Section: The European Union (Eu)mentioning

confidence: 99%

Scaling Up From Regional Case Studies to a Global Harmful Algal Bloom Observing System

Anderson¹,

Berdalet²,

Kudela³

et al. 2019

Front. Mar. Sci.

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Anderson et al. Harmful Algal Bloom Observing System automated, near real-time information from nearshore and offshore sites situated in HAB transport pathways to provide improved, advanced HAB warnings; (4) merge ecological knowledge and models with existing Earth System Modeling Frameworks to enhance end-to-end capabilities in forecasting and scenario-building; (5) provide seasonal to decadal forecasts to allow governments to plan, adapt to a changing marine environment, and ensure coastal industries are supported and sustained in the years ahead; and (6) support implementation of the recent calls for action by the United Nations Decade 2010 Sustainable Development Goals (SDGs) to develop indicators that are relevant to an effective and global HAB early warning system.

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“…In the last decade, the increasing occurrence of extensive Ostreopsis cf. ovata Fukuyo blooms has been reported in temperate coastal regions, including the Mediterranean (Accoroni & Totti, ; Aligizaki & Nikolaidis, ; Funari, Manganelli, & Testai, ; Mangialajo et al., ; Vila, Garcés, & Masó, ). Mediterranean O .…”

Section: Introductionmentioning

confidence: 99%

“…The epiphytic/benthic dinoflagellate grows onto a wide range of substrata, forming thick mucilaginous mats (Giussani et al., ; Honsell et al., ; Totti, Accoroni, Cerino, Cucchiari, & Romagnoli, ). Blooms occur during summer‐late summer often in moderate anthropogenic impacted sites (Accoroni & Totti, ; Accoroni et al., ; Marini, Fornasiero, & Artegiani, ), and they can have a severe impact on human health (Funari et al., ; Kermarec et al., and references therein) and on invertebrate benthic communities (Accoroni et al., ; Carella et al., ; Migliaccio et al., ). Toxin accumulation has been reported in macrofauna (Aligizaki, Katikou, Milandri, & Diogene, ; Biré et al., ; Furlan et al., ), yet no connected food poisoning has been shown.…”

Section: Introductionmentioning

confidence: 99%

Microbial dynamics during harmful dinoflagellate Ostreopsis cf. ovata growth: Bacterial succession and viral abundance pattern

2018

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Algal–bacterial interactions play a major role in shaping diversity of algal associated bacterial communities. Temporal variation in bacterial phylogenetic composition reflects changes of these complex interactions which occur during the algal growth cycle as well as throughout the lifetime of algal blooms. Viruses are also known to cause shifts in bacterial community diversity which could affect algal bloom phases. This study investigated on changes of bacterial and viral abundances, bacterial physiological status, and on bacterial successional pattern associated with the harmful benthic dinoflagellate Ostreopsis cf. ovata in batch cultures over the algal growth cycle. Bacterial community phylogenetic structure was assessed by 16S rRNA gene ION torrent sequencing. A comparison between bacterial community retrieved in cultures and that one co‐occurring in situ during the development of the O. cf. ovata bloom from where the algal strain was isolated was also reported. Bacterial community growth was characterized by a biphasic pattern with the highest contributions (~60%) of highly active bacteria found at the two bacterial exponential growth steps. An alphaproteobacterial consortium composed by the Rhodobacteraceae Dinoroseobacter (22.2%–35.4%) and Roseovarius (5.7%–18.3%), together with Oceanicaulis (14.2‐40.3%), was strongly associated with O. cf. ovata over the algal growth. The Rhodobacteraceae members encompassed phylotypes with an assessed mutualistic‐pathogenic bimodal behavior. Fabibacter (0.7%–25.2%), Labrenzia (5.6%–24.3%), and Dietzia (0.04%–1.7%) were relevant at the stationary phase. Overall, the successional pattern and the metabolic and functional traits of the bacterial community retrieved in culture mirror those ones underpinning O. cf. ovata bloom dynamics in field. Viral abundances increased synoptically with bacterial abundances during the first bacterial exponential growth step while being stationary during the second step. Microbial trends also suggest that viruses induced some shifts in bacterial community composition.

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Ostreospis cf. ovata blooms in coastal water: Italian guidelines to assess and manage the risk associated to bathing waters and recreational activities

Cited by 30 publications

References 86 publications

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

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

Scaling Up From Regional Case Studies to a Global Harmful Algal Bloom Observing System

Microbial dynamics during harmful dinoflagellate Ostreopsis cf. ovata growth: Bacterial succession and viral abundance pattern

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