Effects of light and darkness on pH regulation in three coral species exposed to seawater acidification
Effects of light and darkness on pH regulation in three coral species exposed to seawater acidification
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光照和黑暗对暴露于海水酸化的三种珊瑚物种 pH 调节的影响
DOI：
10.1038/s41598-018-38168-0
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发表时间：
2019
影响因子：
4.6
通讯作者：
S. Tambutté
中科院分区：
文献类型：
--
作者：
A. Venn;É. Tambutté;Natacha Caminiti;N. Techer;D. Allemand;S. Tambutté
珊瑚对海洋酸化的适应能力被认为依赖于对细胞外钙化介质pH值（pHECM）的调节，但很少有研究比较珊瑚物种在高pCO₂条件下控制这一参数的能力。此外，光照和黑暗条件会影响珊瑚的pH调节和钙化作用，但对于海水酸化条件下其影响却知之甚少。在此，我们研究了酸化在光照和黑暗条件下对三种珊瑚物种（鹿角杯形珊瑚、蔷薇珊瑚和风信子鹿角珊瑚）的pHECM、钙化细胞内pH值（pHI）、钙化作用、光合作用和呼吸作用的影响。我们发现鹿角杯形珊瑚在光照和黑暗条件下酸化时能够维持pHECM，但蔷薇珊瑚和风信子鹿角珊瑚的pHECM在黑暗中的下降程度比在光照下大得多。酸化使所有三个物种的钙化细胞pHI降低，但我们发现光照对pHI有意外的积极影响。钙化速率和pHECM在酸化条件下一起下降，但它们之间的关系存在不一致之处，这表明其他生理参数可能会影响珊瑚钙化对酸化的反应。总体而言，我们的研究揭示了珊瑚在暴露于酸化环境时，受光照和黑暗条件影响，在pHECM和pHI调节方面存在种间差异。
The resilience of corals to ocean acidification has been proposed to rely on regulation of extracellular calcifying medium pH (pHECM), but few studies have compared the capacity of coral species to control this parameter at elevated pCO2. Furthermore, exposure to light and darkness influences both pH regulation and calcification in corals, but little is known about its effect under conditions of seawater acidification. Here we investigated the effect of acidification in light and darkness on pHECM, calcifying cell intracellular pH (pHI), calcification, photosynthesis and respiration in three coral species: Stylophora pistillata, Pocillopora damicornis and Acropora hyacinthus. We show that S. pistillata was able to maintain pHECM under acidification in light and darkness, but pHECM decreased in P. damicornis and A. hyacinthus to a much greater extent in darkness than in the light. Acidification depressed calcifying cell pHI in all three species, but we identified an unexpected positive effect of light on pHI. Calcification rate and pHECM decreased together under acidification, but there are inconsistencies in their relationship indicating that other physiological parameters are likely to shape how coral calcification responds to acidification. Overall our study reveals interspecies differences in coral regulation of pHECM and pHI when exposed to acidification, influenced by exposure to light and darkness.
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影响因子：
16.6
作者：
Cai WJ;Ma Y;Hopkinson BM;Grottoli AG;Warner ME;Ding Q;Hu X;Yuan X;Schoepf V;Xu H;Han C;Melman TF;Hoadley KD;Pettay DT;Matsui Y;Baumann JH;Levas S;Ying Y;Wang Y
通讯作者：
Wang Y
DOI：
10.1098/rspb.2016.1669
发表时间：
2017-01-25
影响因子：
4.7
作者：
Comeau, S.;Tambutte, E.;Venn, A. A.
通讯作者：
Venn, A. A.
光的可用性决定了造礁珊瑚对海洋酸化的敏感性
影响因子：
3.5
作者：
Suggett D
通讯作者：
Suggett D
影响因子：
3.7
作者：
Schoepf V;Grottoli AG;Warner ME;Cai WJ;Melman TF;Hoadley KD;Pettay DT;Hu X;Li Q;Xu H;Wang Y;Matsui Y;Baumann JH
通讯作者：
Baumann JH