Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat
International audience This study aimed to determine the effect of the climatic change on the phototrophic communities of hypersaline microbial mats. Ocean acidification and warming were simulated alone and together on microbial mats placed into mesocosms. As expected, the temperature in the warming...
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Online Access: | https://doi.org/10.1016/j.scitotenv.2021.149787 https://hal.archives-ouvertes.fr/hal-03328597 |
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fttriple:oai:gotriple.eu:10670/1.umd1jr 2023-05-15T17:50:43+02:00 Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat Mazière, Camille Bodo, M. Perdrau, M.A. Cravo-Laureau, Cristiana Duran, Robert Dupuy, C. Hubas, Cédric LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) Muséum national d'Histoire naturelle (MNHN) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU) Station de Biologie Marine de Concarneau Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE) Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN) 2022-01-01 https://doi.org/10.1016/j.scitotenv.2021.149787 https://hal.archives-ouvertes.fr/hal-03328597 en eng HAL CCSD Elsevier hal-03328597 doi:10.1016/j.scitotenv.2021.149787 10670/1.umd1jr https://hal.archives-ouvertes.fr/hal-03328597 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0048-9697 EISSN: 1879-1026 Science of the Total Environment Science of the Total Environment, Elsevier, 2022, 802, pp.149787. ⟨10.1016/j.scitotenv.2021.149787⟩ Phototrophic communities Mesocosms Chlorophyll derivatives Hypersaline microbial mats Ocean acidification envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.1016/j.scitotenv.2021.149787 2023-01-22T16:57:19Z International audience This study aimed to determine the effect of the climatic change on the phototrophic communities of hypersaline microbial mats. Ocean acidification and warming were simulated alone and together on microbial mats placed into mesocosms. As expected, the temperature in the warming treatments increased by 4 °C from the initial temperature. Surprisingly, no significance difference was observed between the water pH of the different treatments despite of a decrease of 0.4 unit pH in the water reserves of acidification treatments. The salinity increased on the warming treatments and the dissolved oxygen concentration increased and was higher on the acidification treatments. A total of 37 pigments were identified belonging to chlorophylls, carotenes and xanthophylls families. The higher abundance of unknown chlorophyll molecules called chlorophyll derivatives was observed in the acidification alone treatment with a decrease in chlorophyll a abundance. This change in pigmentary composition was accompanied by a higher production of bound extracellular carbohydrates but didn't affect the photosynthetic efficiency of the microbial mats. A careful analysis of the absorption properties of these molecules indicated that these chlorophyll derivatives were likely bacteriochlorophyll c contained in the chlorosomes of green anoxygenic phototroph bacteria. Two hypotheses can be drawn from these results: 1/ the phototrophic communities of the microbial mats were modified under acidification treatment leading to a higher relative abundance of green anoxygenic bacteria, or 2/ the highest availability of CO2 in the environment has led to a shift in the metabolism of green anoxygenic bacteria being more competitive than other phototrophs. Article in Journal/Newspaper Ocean acidification Unknown Science of The Total Environment 802 149787 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Phototrophic communities Mesocosms Chlorophyll derivatives Hypersaline microbial mats Ocean acidification envir geo |
spellingShingle |
Phototrophic communities Mesocosms Chlorophyll derivatives Hypersaline microbial mats Ocean acidification envir geo Mazière, Camille Bodo, M. Perdrau, M.A. Cravo-Laureau, Cristiana Duran, Robert Dupuy, C. Hubas, Cédric Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
topic_facet |
Phototrophic communities Mesocosms Chlorophyll derivatives Hypersaline microbial mats Ocean acidification envir geo |
description |
International audience This study aimed to determine the effect of the climatic change on the phototrophic communities of hypersaline microbial mats. Ocean acidification and warming were simulated alone and together on microbial mats placed into mesocosms. As expected, the temperature in the warming treatments increased by 4 °C from the initial temperature. Surprisingly, no significance difference was observed between the water pH of the different treatments despite of a decrease of 0.4 unit pH in the water reserves of acidification treatments. The salinity increased on the warming treatments and the dissolved oxygen concentration increased and was higher on the acidification treatments. A total of 37 pigments were identified belonging to chlorophylls, carotenes and xanthophylls families. The higher abundance of unknown chlorophyll molecules called chlorophyll derivatives was observed in the acidification alone treatment with a decrease in chlorophyll a abundance. This change in pigmentary composition was accompanied by a higher production of bound extracellular carbohydrates but didn't affect the photosynthetic efficiency of the microbial mats. A careful analysis of the absorption properties of these molecules indicated that these chlorophyll derivatives were likely bacteriochlorophyll c contained in the chlorosomes of green anoxygenic phototroph bacteria. Two hypotheses can be drawn from these results: 1/ the phototrophic communities of the microbial mats were modified under acidification treatment leading to a higher relative abundance of green anoxygenic bacteria, or 2/ the highest availability of CO2 in the environment has led to a shift in the metabolism of green anoxygenic bacteria being more competitive than other phototrophs. |
author2 |
LIttoral ENvironnement et Sociétés - UMRi 7266 (LIENSs) Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS) Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM) Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) Muséum national d'Histoire naturelle (MNHN) Biologie des Organismes et Ecosystèmes Aquatiques (BOREA) Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU) Station de Biologie Marine de Concarneau Direction générale déléguée à la Recherche, à l’Expertise, à la Valorisation et à l’Enseignement-Formation (DGD.REVE) Muséum national d'Histoire naturelle (MNHN)-Muséum national d'Histoire naturelle (MNHN) |
format |
Article in Journal/Newspaper |
author |
Mazière, Camille Bodo, M. Perdrau, M.A. Cravo-Laureau, Cristiana Duran, Robert Dupuy, C. Hubas, Cédric |
author_facet |
Mazière, Camille Bodo, M. Perdrau, M.A. Cravo-Laureau, Cristiana Duran, Robert Dupuy, C. Hubas, Cédric |
author_sort |
Mazière, Camille |
title |
Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
title_short |
Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
title_full |
Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
title_fullStr |
Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
title_full_unstemmed |
Climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
title_sort |
climate change influences chlorophylls and bacteriochlorophylls metabolism in hypersaline microbial mat |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://doi.org/10.1016/j.scitotenv.2021.149787 https://hal.archives-ouvertes.fr/hal-03328597 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 0048-9697 EISSN: 1879-1026 Science of the Total Environment Science of the Total Environment, Elsevier, 2022, 802, pp.149787. ⟨10.1016/j.scitotenv.2021.149787⟩ |
op_relation |
hal-03328597 doi:10.1016/j.scitotenv.2021.149787 10670/1.umd1jr https://hal.archives-ouvertes.fr/hal-03328597 |
op_rights |
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op_doi |
https://doi.org/10.1016/j.scitotenv.2021.149787 |
container_title |
Science of The Total Environment |
container_volume |
802 |
container_start_page |
149787 |
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1766157590372286464 |