Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.

Ocean acidification is potentially one of the greatest threats to marine ecosystems and global carbon cycling. Amongst calcifying organisms, coccolithophores have received special attention because their calcite precipitation plays a significant role in alkalinity flux to the deep ocean (i.e., inorg...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Takahiro Irie, Kazuhiro Bessho, Helen S Findlay, Piero Calosi
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2010
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8b682584c6b64038961ea3a4665f6152
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:8b682584c6b64038961ea3a4665f6152
record_format	dspace
spelling	oai:doaj.org-article:8b682584c6b64038961ea3a4665f61522021-11-18T07:03:16ZIncreasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.1932-620310.1371/journal.pone.0013436https://doaj.org/article/8b682584c6b64038961ea3a4665f61522010-10-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/20976167/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Ocean acidification is potentially one of the greatest threats to marine ecosystems and global carbon cycling. Amongst calcifying organisms, coccolithophores have received special attention because their calcite precipitation plays a significant role in alkalinity flux to the deep ocean (i.e., inorganic carbon pump). Currently, empirical effort is devoted to evaluating the plastic responses to acidification, but evolutionary considerations are missing from this approach. We thus constructed an optimality model to evaluate the evolutionary response of coccolithophorid life history, assuming that their exoskeleton (coccolith) serves to reduce the instantaneous mortality rates. Our model predicted that natural selection favors constructing more heavily calcified exoskeleton in response to increased acidification-driven costs. This counter-intuitive response occurs because the fitness benefit of choosing a better-defended, slower growth strategy in more acidic conditions, outweighs that of accelerating the cell cycle, as this occurs by producing less calcified exoskeleton. Contrary to the widely held belief, the evolutionarily optimized population can precipitate larger amounts of CaCO(3) during the bloom in more acidified seawater, depending on parameter values. These findings suggest that ocean acidification may enhance the calcification rates of marine organisms as an adaptive response, possibly accompanied by higher carbon fixation ability. Our theory also provides a compelling explanation for the multispecific fossil time-series record from ∼200 years ago to present, in which mean coccolith size has increased along with rising atmospheric CO(2) concentration.Takahiro IrieKazuhiro BesshoHelen S FindlayPiero CalosiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 5, Iss 10, p e13436 (2010)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Takahiro Irie Kazuhiro Bessho Helen S Findlay Piero Calosi Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
description	Ocean acidification is potentially one of the greatest threats to marine ecosystems and global carbon cycling. Amongst calcifying organisms, coccolithophores have received special attention because their calcite precipitation plays a significant role in alkalinity flux to the deep ocean (i.e., inorganic carbon pump). Currently, empirical effort is devoted to evaluating the plastic responses to acidification, but evolutionary considerations are missing from this approach. We thus constructed an optimality model to evaluate the evolutionary response of coccolithophorid life history, assuming that their exoskeleton (coccolith) serves to reduce the instantaneous mortality rates. Our model predicted that natural selection favors constructing more heavily calcified exoskeleton in response to increased acidification-driven costs. This counter-intuitive response occurs because the fitness benefit of choosing a better-defended, slower growth strategy in more acidic conditions, outweighs that of accelerating the cell cycle, as this occurs by producing less calcified exoskeleton. Contrary to the widely held belief, the evolutionarily optimized population can precipitate larger amounts of CaCO(3) during the bloom in more acidified seawater, depending on parameter values. These findings suggest that ocean acidification may enhance the calcification rates of marine organisms as an adaptive response, possibly accompanied by higher carbon fixation ability. Our theory also provides a compelling explanation for the multispecific fossil time-series record from ∼200 years ago to present, in which mean coccolith size has increased along with rising atmospheric CO(2) concentration.
format	article
author	Takahiro Irie Kazuhiro Bessho Helen S Findlay Piero Calosi
author_facet	Takahiro Irie Kazuhiro Bessho Helen S Findlay Piero Calosi
author_sort	Takahiro Irie
title	Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
title_short	Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
title_full	Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
title_fullStr	Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
title_full_unstemmed	Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
title_sort	increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.
publisher	Public Library of Science (PLoS)
publishDate	2010
url	https://doaj.org/article/8b682584c6b64038961ea3a4665f6152
work_keys_str_mv	AT takahiroirie increasingcostsduetooceanacidificationdrivesphytoplanktontobemoreheavilycalcifiedoptimalgrowthstrategyofcoccolithophores AT kazuhirobessho increasingcostsduetooceanacidificationdrivesphytoplanktontobemoreheavilycalcifiedoptimalgrowthstrategyofcoccolithophores AT helensfindlay increasingcostsduetooceanacidificationdrivesphytoplanktontobemoreheavilycalcifiedoptimalgrowthstrategyofcoccolithophores AT pierocalosi increasingcostsduetooceanacidificationdrivesphytoplanktontobemoreheavilycalcifiedoptimalgrowthstrategyofcoccolithophores
_version_	1718423991143628800

Increasing costs due to ocean acidification drives phytoplankton to be more heavily calcified: optimal growth strategy of coccolithophores.

Ejemplares similares