Coral reef metabolism and carbon chemistry dynamics of a coral reef flat
Coral reef metabolism and carbon chemistry dynamics of a coral reef flat
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DOI：
10.1002/2015gl063488
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发表时间：
2015-05-28
影响因子：
5.2
通讯作者：
Anthony, Ken
中科院分区：
文献类型：
--
作者：
Albright, Rebecca;Benthuysen, Jessica;Anthony, Ken
全球碳排放继续使海洋酸化，促使人们越来越关注珊瑚礁维持正净钙化率的能力。努力建立珊瑚礁钙化与文石饱和状态(ARAG)等碳酸盐参数之间的牢固关系，旨在促进对面对海洋酸化时珊瑚礁钙化将如何变化的有意义的预测。在这里，我们调查了珊瑚礁平台碳酸盐化学在海底循环中的自然趋势，并通过量化净群落钙化和净群落生产将这些趋势与海底碳通量联系起来。我们发现，尽管钙化对(Arag)的明显依赖关系被认为是简单的成对关系，但如果考虑到净钙化对净光合作用的依赖，知道(Arag)并不能增加实质性的解释价值。这表明，在短时间尺度上，与控制净光合作用的因素相比，(Arag)对净钙化的控制较弱。
Global carbon emissions continue to acidify the oceans, motivating growing concern for the ability of coral reefs to maintain net positive calcification rates. Efforts to develop robust relationships between coral reef calcification and carbonate parameters such as aragonite saturation state ((arag)) aim to facilitate meaningful predictions of how reef calcification will change in the face of ocean acidification. Here we investigate natural trends in carbonate chemistry of a coral reef flat over diel cycles and relate these trends to benthic carbon fluxes by quantifying net community calcification and net community production. We find that, despite an apparent dependence of calcification on (arag) seen in a simple pairwise relationship, if the dependence of net calcification on net photosynthesis is accounted for, knowing (arag) does not add substantial explanatory value. This suggests that, over short time scales, the control of (arag) on net calcification is weak relative to factors governing net photosynthesis.