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Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions

Ocean acidification is expected to have detrimental consequences for the most abundant calcifying phytoplankton species Emiliania huxleyi. However, this assumption is mainly based on laboratory manipulations that are unable to reproduce the complexity of natural ecosystems. Here, E. huxleyi coccolit...

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Autores principales: Rigual-Hernández, A. S., Trull, T. W., Flores, J. A., Nodder, S. D., Eriksen, R., Davies, D. M., Hallegraeff, G. M., Sierro, F. J., Patil, S. M., Cortina, A., Ballegeer, A. M., Northcote, L. C., Abrantes, F., Rufino, M. M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7018777/
https://www.ncbi.nlm.nih.gov/pubmed/32054880
http://dx.doi.org/10.1038/s41598-020-59375-8
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author Rigual-Hernández, A. S.
Trull, T. W.
Flores, J. A.
Nodder, S. D.
Eriksen, R.
Davies, D. M.
Hallegraeff, G. M.
Sierro, F. J.
Patil, S. M.
Cortina, A.
Ballegeer, A. M.
Northcote, L. C.
Abrantes, F.
Rufino, M. M.
author_facet Rigual-Hernández, A. S.
Trull, T. W.
Flores, J. A.
Nodder, S. D.
Eriksen, R.
Davies, D. M.
Hallegraeff, G. M.
Sierro, F. J.
Patil, S. M.
Cortina, A.
Ballegeer, A. M.
Northcote, L. C.
Abrantes, F.
Rufino, M. M.
author_sort Rigual-Hernández, A. S.
collection PubMed
description Ocean acidification is expected to have detrimental consequences for the most abundant calcifying phytoplankton species Emiliania huxleyi. However, this assumption is mainly based on laboratory manipulations that are unable to reproduce the complexity of natural ecosystems. Here, E. huxleyi coccolith assemblages collected over a year by an autonomous water sampler and sediment traps in the Subantarctic Zone were analysed. The combination of taxonomic and morphometric analyses together with in situ measurements of surface-water properties allowed us to monitor, with unprecedented detail, the seasonal cycle of E. huxleyi at two Subantarctic stations. E. huxleyi subantarctic assemblages were composed of a mixture of, at least, four different morphotypes. Heavier morphotypes exhibited their maximum relative abundances during winter, coinciding with peak annual TCO(2) and nutrient concentrations, while lighter morphotypes dominated during summer, coinciding with lowest TCO(2) and nutrients levels. The similar seasonality observed in both time-series suggests that it may be a circumpolar feature of the Subantarctic zone. Our results challenge the view that ocean acidification will necessarily lead to a replacement of heavily-calcified coccolithophores by lightly-calcified ones in subpolar ecosystems, and emphasize the need to consider the cumulative effect of multiple stressors on the probable succession of morphotypes.
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spelling pubmed-70187772020-02-21 Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions Rigual-Hernández, A. S. Trull, T. W. Flores, J. A. Nodder, S. D. Eriksen, R. Davies, D. M. Hallegraeff, G. M. Sierro, F. J. Patil, S. M. Cortina, A. Ballegeer, A. M. Northcote, L. C. Abrantes, F. Rufino, M. M. Sci Rep Article Ocean acidification is expected to have detrimental consequences for the most abundant calcifying phytoplankton species Emiliania huxleyi. However, this assumption is mainly based on laboratory manipulations that are unable to reproduce the complexity of natural ecosystems. Here, E. huxleyi coccolith assemblages collected over a year by an autonomous water sampler and sediment traps in the Subantarctic Zone were analysed. The combination of taxonomic and morphometric analyses together with in situ measurements of surface-water properties allowed us to monitor, with unprecedented detail, the seasonal cycle of E. huxleyi at two Subantarctic stations. E. huxleyi subantarctic assemblages were composed of a mixture of, at least, four different morphotypes. Heavier morphotypes exhibited their maximum relative abundances during winter, coinciding with peak annual TCO(2) and nutrient concentrations, while lighter morphotypes dominated during summer, coinciding with lowest TCO(2) and nutrients levels. The similar seasonality observed in both time-series suggests that it may be a circumpolar feature of the Subantarctic zone. Our results challenge the view that ocean acidification will necessarily lead to a replacement of heavily-calcified coccolithophores by lightly-calcified ones in subpolar ecosystems, and emphasize the need to consider the cumulative effect of multiple stressors on the probable succession of morphotypes. Nature Publishing Group UK 2020-02-13 /pmc/articles/PMC7018777/ /pubmed/32054880 http://dx.doi.org/10.1038/s41598-020-59375-8 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Rigual-Hernández, A. S.
Trull, T. W.
Flores, J. A.
Nodder, S. D.
Eriksen, R.
Davies, D. M.
Hallegraeff, G. M.
Sierro, F. J.
Patil, S. M.
Cortina, A.
Ballegeer, A. M.
Northcote, L. C.
Abrantes, F.
Rufino, M. M.
Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions
title Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions
title_full Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions
title_fullStr Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions
title_full_unstemmed Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions
title_short Full annual monitoring of Subantarctic Emiliania huxleyi populations reveals highly calcified morphotypes in high-CO(2) winter conditions
title_sort full annual monitoring of subantarctic emiliania huxleyi populations reveals highly calcified morphotypes in high-co(2) winter conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7018777/
https://www.ncbi.nlm.nih.gov/pubmed/32054880
http://dx.doi.org/10.1038/s41598-020-59375-8
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