Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA 91330-8303, USA
Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA.
J Exp Biol. 2020 Apr 14;223(Pt 8):jeb217000. doi: 10.1242/jeb.217000.
Experiments with coral fragments (i.e. nubbins) have shown that net calcification is depressed by elevated Evaluating the implications of this finding requires scaling of results from nubbins to colonies, yet the experiments to codify this process have not been carried out. Building from our previous research demonstrating that net calcification of (2-13 cm diameter) was unaffected by (400 and 1000 µatm) and temperature (26.5 and 29.7°C), we sought generality to this outcome by testing how colony size modulates and temperature sensitivity in a branching acroporid. Together, these taxa represent two of the dominant lineages of branching corals on Indo-Pacific coral reefs. Two trials conducted over 2 years tested the hypothesis that the seasonal range in seawater temperature (26.5 and 29.2°C) and a future (1062 µatm versus an ambient level of 461 µatm) affect net calcification of an ecologically relevant size range (5-20 cm diameter) of colonies of As for , the effects of temperature and on net calcification (mg day) of were not statistically detectable. These results support the generality of a null outcome on net calcification of exposing intact colonies of branching corals to environmental conditions contrasting seasonal variation in temperature and predicted future variation in While there is a need to expand beyond an experimental culture relying on coral nubbins as tractable replicates, rigorously responding to this need poses substantial ethical and logistical challenges.
珊瑚碎片（即珊瑚断枝）实验表明，升高的会抑制净钙化作用。评估这一发现的意义需要将珊瑚断枝的结果扩展到珊瑚群体，但尚未进行对这一过程进行编码的实验。基于我们之前的研究表明，（直径 2-13 厘米）的净钙化作用不受（400 和 1000 微atm）和温度（26.5 和 29.7°C）的影响，我们通过测试分枝鹿角珊瑚的群体大小如何调节 和温度敏感性来寻找这一结果的普遍性。这两个分类群共同代表了印度-太平洋珊瑚礁上分枝珊瑚的两个主要谱系。在两年内进行的两项试验检验了以下假设：海水温度的季节性变化（26.5 和 29.2°C）和未来（1062 微atm 与 461 微atm 的环境水平）会影响到生态相关大小范围（5-20 厘米直径）的分枝珊瑚群体的净钙化作用。至于 ，温度和 的升高对（mg 天）的净钙化作用没有统计学上的影响。这些结果支持了在暴露于温度和 变化的环境条件下，分枝珊瑚完整群体的净钙化作用呈零结果的普遍性。虽然需要超越依赖珊瑚断枝作为可处理重复的实验培养，但严格应对这一需求带来了实质性的伦理和后勤挑战。
