Coral energy reserves and calcification in a high-CO2 world at two temperatures.
Coral energy reserves and calcification in a high-CO2 world at two temperatures.
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DOI：
10.1371/journal.pone.0075049
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Baumann JH
中科院分区：
文献类型：
--
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
大气中二氧化碳浓度的上升通过导致海洋酸化和变暖，对全球珊瑚礁构成威胁。然而，升高的二氧化碳分压和温度对珊瑚生理和恢复力的综合影响仍知之甚少。虽然珊瑚的钙化作用和能量储备是重要的健康指标，但到目前为止，还没有研究在不同温度情景下的海洋酸化条件下同时测量能量储备库（即脂质、蛋白质和碳水化合物）以及钙化作用。四种珊瑚物种，鹿角杯形珊瑚（Acropora millepora）、蔷薇珊瑚（Montipora monasteriata）、鹿角珊瑚（Pocillopora damicornis）、肾形陀螺珊瑚（Turbinaria reniformis），在总共六种条件下饲养3.5周，代表三种二氧化碳分压水平（382、607、741微大气压），并且在每个二氧化碳分压水平内有两种温度状况（26.5、29.0°C）。在实验条件下一个月后，只有鹿角杯形珊瑚在面对本世纪末预期的海水二氧化碳分压时钙化作用降低（-53%），而其他三个物种即使在二氧化碳分压和温度都升高的情况下也保持了钙化速率。珊瑚的能量储备对升高的二氧化碳分压和温度表现出不同的反应，要么不受影响，要么呈现非线性反应，最低和最高浓度常常出现在607微大气压的中等二氧化碳分压水平。每两周一次的喂食可能有助于珊瑚在这些条件下维持钙化速率和能量储备。温度常常调节珊瑚生理的许多方面对海洋酸化的反应，既减轻也加剧二氧化碳分压的影响。这首次表明，在海洋酸化条件下，珊瑚的能量储备一般不会被代谢以维持钙化作用，这对高二氧化碳世界中珊瑚的健康和抗白化能力具有重要意义。总体而言，这些发现表明，一些珊瑚对同时变暖且酸化的海洋的抵抗力可能比之前预期的更强。
Rising atmospheric CO2 concentrations threaten coral reefs globally by causing ocean acidification (OA) and warming. Yet, the combined effects of elevated pCO2 and temperature on coral physiology and resilience remain poorly understood. While coral calcification and energy reserves are important health indicators, no studies to date have measured energy reserve pools (i.e., lipid, protein, and carbohydrate) together with calcification under OA conditions under different temperature scenarios. Four coral species, Acropora millepora, Montipora monasteriata, Pocillopora damicornis, Turbinaria reniformis, were reared under a total of six conditions for 3.5 weeks, representing three pCO2 levels (382, 607, 741 µatm), and two temperature regimes (26.5, 29.0°C) within each pCO2 level. After one month under experimental conditions, only A. millepora decreased calcification (−53%) in response to seawater pCO2 expected by the end of this century, whereas the other three species maintained calcification rates even when both pCO2 and temperature were elevated. Coral energy reserves showed mixed responses to elevated pCO2 and temperature, and were either unaffected or displayed nonlinear responses with both the lowest and highest concentrations often observed at the mid-pCO2 level of 607 µatm. Biweekly feeding may have helped corals maintain calcification rates and energy reserves under these conditions. Temperature often modulated the response of many aspects of coral physiology to OA, and both mitigated and worsened pCO2 effects. This demonstrates for the first time that coral energy reserves are generally not metabolized to sustain calcification under OA, which has important implications for coral health and bleaching resilience in a high-CO2 world. Overall, these findings suggest that some corals could be more resistant to simultaneously warming and acidifying oceans than previously expected.
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影响因子：
4.5
作者：
Comeau, S.;Edmunds, P. J.;Carpenter, R. C.
通讯作者：
Carpenter, R. C.
影响因子：
3.5
作者：
Cohen, Anne L.;McCorkle, Daniel C.;Rose, Kathryn A.
通讯作者：
Rose, Kathryn A.
影响因子：
3.5
作者：
D'Croz, L;Maté, JL
通讯作者：
Maté, JL
DOI：
10.1073/pnas.1007273107
发表时间：
2010-11-23
影响因子：
11.1
作者：
Albright, Rebecca;Mason, Benjamin;Langdon, Chris
通讯作者：
Langdon, Chris
影响因子：
56.9
作者：
Cantin, Neal E.;Cohen, Anne L.;McCorkle, Daniel C.
通讯作者：
McCorkle, Daniel C.