In this study, fore reef coral communities were exposed to high pCO₂ for a year to explore the relationship between net accretion (G_net) and community structure (planar area growth). Coral reef communities simulating the fore reef at 17-m depth on Mo’orea, French Polynesia, were assembled in three outdoor flumes (each 500 l) that were maintained at ambient (396 µatm), 782 µatm, and 1434 µatm pCO₂, supplied with seawater at 300 l h⁻¹, and exposed to light simulating 17-m depth. The communities were constructed using corals from the fore reef, and the responses of massive Porites spp., Acropora spp., and Pocillopora verrucosa were assessed through monthly measurements of G_net and planar area. High pCO₂ depressed G_net but did not affect colony area by taxon, although the areas of Acropora spp. and P. verrucosa summed to cause multivariate community structure to differ among treatments. These results suggest that skeletal plasticity modulates the effects of reduced G_net at high pCO₂ on planar growth, at least over a year. The low sensitivity of the planar growth of fore reef corals to the effects of ocean acidification (OA) on net calcification supports the counterintuitive conclusion that coral community structure may not be strongly affected by OA.

中文翻译：

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高pCO ₂对在室外烟道中组装的热带前礁群落结构的长达一年的影响

在这项研究中，前礁珊瑚群落暴露于高pCO ₂一年，以探索净吸积（G _net）与群落结构（平面面积增长）之间的关系。在法属波利尼西亚Mo'orea上模拟前礁的珊瑚礁群落，深度为17米，分为三个室外水槽（每个500 l），分别保持在环境（396 µatm），782 µatm和1434 µatm pCO ₂，供应300 lh ^-1的海水，并暴露在模拟17-m深度的光线下。使用来自前礁珊瑚，和大规模的响应，构建社区滨属，鹿角珊瑚属和鹿角疣状通过每月测量G_净面积和平面面积来评估。高pCO ₂抑制了G _net的生长，但并未按分类群影响菌落面积，尽管Acropora spp的面积大。和P。疣膜总和导致多种治疗的社区结构不同。这些结果表明，骨骼可塑性调节在高pCO ₂下还原G_净的作用。至少一年以上的增长。前礁珊瑚平面生长对海洋酸化（OA）对净钙化的影响的敏感性较低，这支持了直觉性的结论，即珊瑚群落结构可能不会受到OA的强烈影响。