Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification
Ocean acidification due to rising atmospheric pCO2 slows down coral calcification and impedes reef formation, with deleterious consequences for the diversity of reef ecosystems. Such interactions contrast with the capacity of corals to actively regulate the chemical composition of the calcifying flu...
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ftleibnizopen:oai:oai.leibnizopen.de:79lMoYoBbHMkKcxzM2uk 2023-10-09T21:54:49+02:00 Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification Hohn, Sönke Merico, Agostino 2015 https://repository.publisso.de/resource/frl:6405751 https://doi.org/10.3389/feart.2014.00037 https://www.frontiersin.org/articles/10.3389/feart.2014.00037/full#h8 eng eng http://creativecommons.org/licenses/by/4.0/ Frontiers in Earth Science, 2: 37 coral polyp model biomineralization ion transport ocean acidification numerical simulation calcification 2015 ftleibnizopen https://doi.org/10.3389/feart.2014.00037 2023-09-17T23:26:50Z Ocean acidification due to rising atmospheric pCO2 slows down coral calcification and impedes reef formation, with deleterious consequences for the diversity of reef ecosystems. Such interactions contrast with the capacity of corals to actively regulate the chemical composition of the calcifying fluid where calcification occurs. This regulation involves the active transport of calcium, bicarbonate, and hydrogen ions through epithelium cells, the transcellular pathway. Ions can also passively diffuse through intercellular spaces via the paracellular pathway, which directly exposes the calcifying fluid to changes in ocean chemistry. Although evidence exists for both pathways, their relative contribution to coral calcification remains unknown. Here we use a mathematical model to test the plausibility of different calcification mechanisms also in relation to ocean acidification. We find that the paracellular pathway generates an efflux of calcium and carbonate from the calcifying fluid, causing a leakage of ions that counteracts the concentration gradients maintained by the transcellular pathway. Increasing ocean acidity exacerbates this carbonate leakage and reduces the ability of corals to accrete calcium carbonate. Other/Unknown Material Ocean acidification LeibnizOpen (The Leibniz Association) Frontiers in Earth Science 2 |
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Open Polar |
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LeibnizOpen (The Leibniz Association) |
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language |
English |
topic |
coral polyp model biomineralization ion transport ocean acidification numerical simulation calcification |
spellingShingle |
coral polyp model biomineralization ion transport ocean acidification numerical simulation calcification Hohn, Sönke Merico, Agostino Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
topic_facet |
coral polyp model biomineralization ion transport ocean acidification numerical simulation calcification |
description |
Ocean acidification due to rising atmospheric pCO2 slows down coral calcification and impedes reef formation, with deleterious consequences for the diversity of reef ecosystems. Such interactions contrast with the capacity of corals to actively regulate the chemical composition of the calcifying fluid where calcification occurs. This regulation involves the active transport of calcium, bicarbonate, and hydrogen ions through epithelium cells, the transcellular pathway. Ions can also passively diffuse through intercellular spaces via the paracellular pathway, which directly exposes the calcifying fluid to changes in ocean chemistry. Although evidence exists for both pathways, their relative contribution to coral calcification remains unknown. Here we use a mathematical model to test the plausibility of different calcification mechanisms also in relation to ocean acidification. We find that the paracellular pathway generates an efflux of calcium and carbonate from the calcifying fluid, causing a leakage of ions that counteracts the concentration gradients maintained by the transcellular pathway. Increasing ocean acidity exacerbates this carbonate leakage and reduces the ability of corals to accrete calcium carbonate. |
author |
Hohn, Sönke Merico, Agostino |
author_facet |
Hohn, Sönke Merico, Agostino |
author_sort |
Hohn, Sönke |
title |
Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
title_short |
Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
title_full |
Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
title_fullStr |
Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
title_full_unstemmed |
Quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
title_sort |
quantifying the relative importance of transcellular and paracellular ion transports to coral polyp calcification |
publishDate |
2015 |
url |
https://repository.publisso.de/resource/frl:6405751 https://doi.org/10.3389/feart.2014.00037 https://www.frontiersin.org/articles/10.3389/feart.2014.00037/full#h8 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Earth Science, 2: 37 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2014.00037 |
container_title |
Frontiers in Earth Science |
container_volume |
2 |
_version_ |
1779318518559277056 |