Ostreopsis cf. ovata dynamics in the NW Mediterranean Sea in relation to biotic and abiotic factors

Carnicer, Olga; Guallar, Carles; Andrée, Karl B.; Diogène, Jorge; Fernández-Tejedor, Margarita

doi:10.1016/j.envres.2015.08.023

Cited by 49 publications

(33 citation statements)

References 55 publications

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“…cf. ovata produces palytoxin‐like compounds, namely, isobaric palytoxin and a wide range of ovatoxins (OVTX‐a to ‐k; Ciminiello et al., ; Brissard et al., ; Tartaglione et al., ) under both field (Accoroni et al., ; Carnicer, Guallar, Andree, Diogène, & Fernández‐Tejedor, ; Ciminiello et al., , ) and laboratory conditions (Pezzolesi et al., , ; Pistocchi et al., ; Vanucci, Pezzolesi, et al., ; Vanucci, Guerrini, et al., ). 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, ).…”

Section: Introductionmentioning

confidence: 99%

“…cf. ovata blooms (Accoroni, Romagnoli, Pichierri, & Totti, ; Totti et al., ) also from different geographic areas (Aligizaki & Nikolaidis, ; Carnicer et al., ; Vila et al., ). Thus, the isolation of O .…”

Section: Introductionmentioning

confidence: 99%

“…ovata mats, as found in other O. cf. ovata blooms (Accoroni, Romagnoli, Pichierri, & Totti, 2016;Totti et al, 2010) also from different geographic areas (Aligizaki & Nikolaidis, 2006;Carnicer et al, 2015;Vila et al, 2001 Bacterial phylogenetic composition was recovered by highthroughput parallel tag sequencing using ION torrent PGM platform.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2018

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“…Nonetheless, the bloom peak occurred at different times between June and October depending on the study sites. As in other temperate waters, the present study sites also followed a general temporal trend that Ostreopsis blooms are summer events in temperate areas although the peak can occur at different months of the year (Carnicer et al, 2015;Accoroni and Totti, 2016). Faust (1998) reported that the abundance of Ostreopsis species with prey ranged from 7 to 55% of all specimens examined from Belize.…”

Section: Discussionmentioning

confidence: 96%

“…While the seasonality of the epiphytic dinoflagellates Ostreopsis species has been reported in temperate waters, including the Mediterranean areas and Peter the Great Bay (NW Sea of Japan) (e.g., Aligizaki and Nikolaidis, 2006;Selina et al, 2014;Carnicer et al, 2015), their seasonal pattern seems to be highly study site-specific as well as year-specific as the peak abundances can occur from spring to autumn (Accoroni and Totti, 2016). In the present study, the Ostreopsis bloom onset was always observed at all sites in June when the water temperature reached more than 19 • C, and the bloom persisted until October.…”

Section: Discussionmentioning

confidence: 99%

Genetic Analyses of the rbcL and psaA Genes From Single Cells Demonstrate a Rhodophyte Origin of the Prey in the Toxic Benthic Dinoflagellate Ostreopsis

Lee

Park

2018

Front. Mar. Sci.

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Phagotrophy of the harmful benthic dinoflagellates of the genus Ostreopsis has long been inferred based on observations of food particles present inside cells, but the prey has not yet been identified. This study aimed to investigate the seasonal dynamics of benthic dinoflagellates Ostreopsis spp. in temperate Korean coastal sites, with special emphasis on their phagotrophy. Further, prey species were identified by extracting the ingested food particles from single Ostreopsis cells and determining their rbcL and psaA gene sequences. High concentration of Ostreopsis cells was observed between June and October at all sites, when the water temperatures were higher than 19 • C, exhibiting a marked temporal seasonality. The percentage of Ostreopsis cells containing ingested food particles exhibited large spatial and temporal variations among sampling sites, ranging from undetectable level to 29.5%, and was not always associated with Ostreopsis cell abundance. Phylogenetic analyses performed using both plastid-encoded rbcL and psaA genes revealed that all sequences obtained from the ingested food particles of Ostreopsis cells grouped within the class Florideophyceae, Rhodophyta. Our result clearly demonstrates that Ostreopsis species consume various macroalgae from Rhodophyta, but not protists, which have long been thought to be the potential prey. The results of this study provide a basis for better understanding the mixotrophic behavior and nutritional ecology of the harmful benthic dinoflagellate Ostreopsis species.

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Dynamics of the genus Ostreopsis (Gonyaulacales, Dinophyceae) in a Mediterranean fish farm

Lounas

Kasmi²,

Chernai

et al. 2021

Environ Monit Assess

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Ostreopsis cf. ovata dynamics in the NW Mediterranean Sea in relation to biotic and abiotic factors

Cited by 49 publications

References 55 publications

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

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

Genetic Analyses of the rbcL and psaA Genes From Single Cells Demonstrate a Rhodophyte Origin of the Prey in the Toxic Benthic Dinoflagellate Ostreopsis

Dynamics of the genus Ostreopsis (Gonyaulacales, Dinophyceae) in a Mediterranean fish farm

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