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Is the toxic dinoflagellate Ostreopsis cf. ovata harmful to Mediterranean benthic invertebrates? Evidences from ecotoxicological tests with the polychaete Dinophilus gyrociliatus

TitleIs the toxic dinoflagellate Ostreopsis cf. ovata harmful to Mediterranean benthic invertebrates? Evidences from ecotoxicological tests with the polychaete Dinophilus gyrociliatus
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2011
AuthorsSimonini, R., Orlandi M., and Abbate M.
JournalMarine Environmental Research
Volume72
Pagination230-233
ISSN01411136
KeywordsAlgae, algal bloom, Algal blooms, allelopathy, Animals, article, benthos, controlled study, Cytotoxicity, dinoflagellate, Dinoflagellida, Dinophilus gyrociliatus, Dinophyceae, ecotoxicology, Invertebrata, invertebrate, LC 50, Lethal effects, Marine Toxins, Mediterranean Sea, Mortality, nonhuman, Ostreopsis cf. ovata, Ostreopsis ovata, palytoxin, pollution effect, Polychaeta, Polychaete, population density, sea water, seasonal variation, Seawater, summer, survival rate, Time Factors, toxic organism, Toxicity, toxicity test, toxicity testing, Water analysis, water temperature
Abstract

Toxicity tests were performed exposing the polychaete Dinophilus gyrociliatus to seawater samples containing the toxic dinoflagellate Ostreopsis cf. ovata. Experiments were carried out twice in mid summer, when O. cf. ovata bloomed, and twice in late summer, when the dinoflagellate density declined. Each time, four treatments were considered: original sample; reference sample, which always contained 200 O. cf. ovata cells ml -1; filtered-seawater sample; artificial seawater (control). All the time, almost all worms survived in the controls and filtered-seawater treatments. In mid summer, the mortality of worms in the treatments containing O. cf. ovata was high and density-dependent. On the other hand, mortality in groups exposed to the original and reference samples collected in late summer was negligible. The high per cell toxicity of O. cf. ovata during mid summer could represent an allelopathic response. The test with D. gyrociliatus appears to be a promising tool for assessing the ecological risk of toxic dinoflagellate blooms. © 2011 Elsevier Ltd.

Notes

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-80053622236&doi=10.1016%2fj.marenvres.2011.08.009&partnerID=40&md5=d44404a78842489de480a4fc86d6df4c
DOI10.1016/j.marenvres.2011.08.009
Citation KeySimonini2011230