Effects of the harmful dinoflagellate Ostreopsis cf. ovata on different life cycle stages of the common moon jellyfish Aurelia sp.

Giussani, Valentina; Costa, Elisa; Pecorino, Danilo; Berdalet, Elisa; Giampaulis, Giulio De; Gentile, Miriam; Fuentes, Verónica; Vila, Magda; Penna, Antonella; Chiantore, Mariachiara; Garaventa, Francesca; Lavorano, Silvia; Faimali, Marco

doi:10.1016/j.hal.2016.05.005

Cited by 25 publications

(10 citation statements)

References 78 publications

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“…ovata remains largely to be assessed. Results of such studies will provide valuable information on the pattern of colonization of this toxic dinoflagellate along the NW Mediterranean shoreline that leads to ecological (Gorbi et al, 2013;Giussani et al, 2016;Pavaux et al, 2019) and health (Ciminiello et al, 2006;Casabianca et al, 2013) concerns.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Role of Macroalgal Surface Metabolites on the Settlement of the Benthic Dinoflagellate Ostreopsis cf. ovata

et al. 2020

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Macroalgae constitute one of the preferred substrates of the benthic dinoflagellate Ostreopsis cf. ovata. Across the Mediterranean Sea, this toxic microalga has been shown to thrive on the surface of various species of macroalgae, including Chlorophyta, Rhodophyta, and Phaeophyceae. Interestingly, some Dictyotaceae are characterized by a low abundance of cells of O. cf. ovata on their surface. Based on the antifouling properties of some specialized metabolites produced by seaweeds, macroalgal metabolites have been proposed to contribute to the settlement and development of O. cf. ovata. To address this question, the composition of the surface of four Dictyotaceae, Dictyota dichotoma, Dictyota spiralis, Taonia atomaria, and Padina pavonica was investigated through an integrative approach combining the analysis of their eukaryotic diversity (18S rRNA gene metabarcoding), their surface metabolome (untargeted LC-MS-based metabolomics) as well as the bioactivity of their surface extracts on O. cf. ovata. Altogether, the data suggest an influence of the macroalgal surface chemistry on the growth of the dinoflagellate, with D. dichotoma being the most bioactive. Some metabolites are proposed to be involved in the observed bioactivity. Other biotic factors are also likely to be entailed in the control of the O. cf. ovata population and they may even prevail on the influence of the macroalgal surface chemistry.

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Section: Introductionmentioning

confidence: 99%

Exploring the Role of Macroalgal Surface Metabolites on the Settlement of the Benthic Dinoflagellate Ostreopsis cf. ovata

et al. 2020

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“…Effects of algal toxins on their primary grazers are variable [23]. Zooplankton species may be affected by toxins showing sub-lethal symptoms such as changes in pulsation frequency and immobility [24], grazing and motility suppression [25], and even lethal responses [26–27]. Moreover, HAB events may lead to shifts in community composition to more resistant species, generating complex cascading effects through the pelagic and benthic food webs [28].…”

Section: Introductionmentioning

confidence: 99%

Toxicity of benthic dinoflagellates on grazing, behavior and survival of the brine shrimp Artemia salina

et al. 2017

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Harmful algae may differently affect their primary grazers, causing sub-lethal effects and/or leading to their death. The present study aim to compare the effects of three toxic benthic dinoflagellates on clearance and grazing rates, behavioral changes, and survival of Artemia salina. Feeding assays consisted in 1-h incubations of brine shrimps with the toxic Prorocentrum lima, Gambierdiscus excentricus and Ostreopsis cf. ovata and the non-toxic Tetraselmis sp. Brine shrimps fed unselectively on all toxic and non-toxic algal preys, without significant differences in clearance and ingestion rates. Acute toxicity assays were performed with dinoflagellate cells in two growth phases during 7-h to assess differences in cell toxicity to A. salina. Additionally, exposure to cell-free medium was performed to evaluate its effects on A. salina survival. The behavior of brine shrimps significantly changed during exposure to the toxic dinoflagellates, becoming immobile at the bottom by the end of the trials. Dinoflagellates significantly affected A. salina survival with 100% mortality after 7-h exposure to cells in exponential phase (all treatments) and to P. lima in stationary phase. Mortality rates of brine shrimps exposed to O. cf. ovata and G. excentricus in stationary phase were 91% and 75%, respectively. However, incubations of the brine shrimps with cell-free medium did not affect A. salina survivorship. Significant differences in toxic effects between cell growth phases were only found in the survival rates of A. salina exposed to G. excentricus. Acute exposure to benthic toxic dinoflagellates induced harmful effects on behavior and survival of A. salina. Negative effects related to the toxicity of benthic dinoflagellates are thus expected on their primary grazers making them more vulnerable to predation and vectors of toxins through the marine food webs.

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“…Other studies reported a strong sensitivity of Dicentrarchus labrax fish juveniles to O. cf. ovata raising the question of the impact on the structure of marine ecosystems (Faimali et al, 2012;Pezzolesi et al, 2012;Giussani et al, 2016). Indeed, as mentioned by the authors, these fish are unable to eat Ostreopsis cells, the observed toxicity was exclusively due to contact with Ostreopsis cells.…”

Section: Indirect Interactions Between Ostreopsis and Marine Faunamentioning

confidence: 95%

“…ovata had a strong impact on the planktonic ephyrae larvae of the jellyfish Aurelia sp. (Giussani et al, 2016) and embryos and eggs of the sea urchin Paracentrotus lividus (Caroppo and Pagliara, 2011;Pagliara and Caroppo, 2012;Migliaccio et al, 2016). The sea urchin Lytechinus variegatus also showed reduced fertilization success and arrest of embryonic development at the gastrula stage when exposed to Ostreopsis cf.…”

Section: Interactions Of Fauna With Planktonic Ostreopsis Cellsmentioning

confidence: 99%

“…Toxin concentrations found in carnivorous and omnivorous organisms (Table 4) suggested transfer and bioaccumulation of toxins within the trophic web (Milandri et al, 2010;Faimali et al, 2012;Pezzolesi et al, 2012;Biré et al, 2013Biré et al, , 2015Giussani et al, 2016). Toxins quantified in both the crab Eriphia verrucosa (carnivorous) and the gastropod Stramonita haemastoma (carnivorous) accounted for up to 58.6 and 26.4 µg•kg −1 (Fresh Weight) respectively.…”

Section: Indirect Interactions Between Ostreopsis and Marine Faunamentioning

confidence: 99%

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

2020

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Effects of the harmful dinoflagellate Ostreopsis cf. ovata on different life cycle stages of the common moon jellyfish Aurelia sp.

Cited by 25 publications

References 78 publications

Exploring the Role of Macroalgal Surface Metabolites on the Settlement of the Benthic Dinoflagellate Ostreopsis cf. ovata

Exploring the Role of Macroalgal Surface Metabolites on the Settlement of the Benthic Dinoflagellate Ostreopsis cf. ovata

Toxicity of benthic dinoflagellates on grazing, behavior and survival of the brine shrimp Artemia salina

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

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