Ostreopsis cf. ovata from western Mediterranean Sea: Physiological responses under different temperature and salinity conditions

Harmful Algae
Olga CarnicerMargarita Fernández-Tejedor

Abstract

The dinoflagellate Ostreopsis cf. ovata proliferates seasonally in the Mediterranean Sea, producing palytoxin-like compounds (ovatoxins) which are considered among the most potent marine toxins. Blooms have been related to several toxic events in which respiratory problems in humans and mortality of benthic marine organisms have been observed. In the coming decades, an increase in temperature and salinity is predicted in the Mediterranean Sea as a consequence of global warming that may provoke alterations in the dynamics of marine microorganisms. In this study, the physiological effects of changes in water temperature and salinity were analyzed, and their interaction through a multi-factorial experiment using two strains of O. cf. ovata in culture that had been isolated from the western Mediterranean Sea. In order to perform an accurate and reliable estimation of cell abundance, hydrochloric acid and sodium-ethylenediaminetetraacetic acid treatments were evaluated for the purpose of disaggregating cell clumps, with the former providing lower counting errors, especially after the stationary phase. Results of the physiological study showed that growth was inhibited at 19°C for all salinities. The highest growth rates were registe...Continue Reading

Citations

Feb 15, 2020·Harmful Algae·Patricia A TesterElisa Berdalet
May 11, 2021·Environmental Monitoring and Assessment·Ryhane LounasBoualem Hamdi
Nov 14, 2017·Environmental Science & Technology·Luciana TartaglioneCarmela Dell'Aversano
May 7, 2020·Toxicon : Official Journal of the International Society on Toxinology·Lucía SoliñoPedro Reis Costa

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