Academic Journal
Ecophysiological responses of Ostreopsis towards temperature: A case study of benthic HAB facing ocean warming ; Réponses écophysiologiques d'Ostreopsis en fonction de la température: Etude de cas d'une espèce responsable d'efflorescence algale nuisible face au réchauffement des océans
| العنوان: | Ecophysiological responses of Ostreopsis towards temperature: A case study of benthic HAB facing ocean warming ; Réponses écophysiologiques d'Ostreopsis en fonction de la température: Etude de cas d'une espèce responsable d'efflorescence algale nuisible face au réchauffement des océans |
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| المؤلفون: | Drouet, Kevin, Lemée, Rodolphe, Guilloud, Emilie, Schmitt, Sophie, Laza-Martinez, A., Seoane, S., Boutoute, Marc, Réveillon, Damien, Hervé, F., Siano, Raffaele, Jauzein, Cecile |
| المساهمون: | Laboratoire d'océanographie de Villefranche (LOV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Unité Dynamiques des Écosystèmes Côtiers (DYNECO), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Universidad del País Vasco Espainia / Euskal Herriko Unibertsitatea España = University of the Basque Country Spain = Université du pays basque Espagne (UPV / EHU), Unité Physiologie et Toxines des Microalgues Toxiques et Nuisibles (PHYTOX), EPA (IE), ANR (FR), BMBF, (DE), UEFISCDI (RO), RCN (NO) and FORMAS (SE), European Project: 690462,H2020,H2020-SC5-2015-one-stage,ERA4CS(2016) |
| المصدر: | ISSN: 1568-9883. |
| بيانات النشر: | CCSD Elsevier |
| سنة النشر: | 2024 |
| المجموعة: | Institut national des sciences de l'Univers: HAL-INSU |
| مصطلحات موضوعية: | Temperature, Acclimation, Harmful Algal Blooms, Ostreopsis, Benthic dinoflagellate, Growth Toxicity, [SDV.EE.BIO]Life Sciences [q-bio]/Ecology, environment/Bioclimatology, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology |
| الوصف: | International audience ; Reports of the benthic dinoflagellate Ostreopsis spp. have been increasing in the last decades, especially in temperate areas. In a context of global warming, evidences of the effects of increasing sea temperatures on its physiology and its distribution are still lacking and need to be investigated. In this study, the influence of temperature on growth, ecophysiology and toxicity was assessed for several strains of O. cf. siamensis from the Bay of Biscay (NE Atlantic) and O. cf. ovata from NW Mediterranean Sea. Cultures were acclimated to temperatures ranging from 14.5 ◦C to 32 ◦C in order to study the whole range of each strain-specific thermal niche. Acclimation was successful for temperatures ranging from 14.5 ◦C to 25 ◦C for O. cf. siamensis and from 19 ◦C to 32 ◦C for O. cf. ovata, with the highest growth rates measured at 22 ◦C (0.54–1.06 d-1) and 28 ◦C (0.52–0.75 d-1), respectively. The analysis of cellular content of pigments and lipids revealed some aspects of thermal acclimation processes in Ostreopsis cells. Specific capacities of O. cf. siamensis to cope with stress of cold temperatures were linked with the activation of a xanthophyll cycle based on diadinoxanthin. Lipids (neutral reserve lipids and polar ones) also revealed species-specific variations, with increases in cellular content noted under extreme temperature conditions. Variations in toxicity were assessed through the Artemia franciscana bioassay. For both species, a decrease in toxicity was observed when temperature dropped under the optimal temperature for growth. No PLTX-like compounds were detected in O. cf. siamensis strains. Thus, the main part of the lethal effect observed on A. franciscana was dependent on currently unknown compounds. From a multiclonal approach, this work allowed for defining specificities in the thermal niche and acclimation strategies of O. cf. siamensis and O. cf. ovata towards temperature. Potential impacts of climate change on the toxic risk associated with Ostreopsis blooms in both ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement//690462/EU/European Research Area for Climate Services/ERA4CS |
| DOI: | 10.1016/j.hal.2024.102648 |
| الاتاحة: | https://hal.science/hal-04582237 https://hal.science/hal-04582237v1/document https://hal.science/hal-04582237v1/file/Drouet%20et%20al%202024%20pre-proof.pdf https://doi.org/10.1016/j.hal.2024.102648 |
| Rights: | http://hal.archives-ouvertes.fr/licences/copyright/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.B8E45C5C |
| قاعدة البيانات: | BASE |
| DOI: | 10.1016/j.hal.2024.102648 |
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