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Is acclimation beneficial to scleractinian corals, Porites spp.?

机译：驯化对Scleractinian珊瑚Porites spp。有益吗？

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With coral reefs impacted by climate change, attention is turning to the extent to which scleractinian corals can acclimatize to new physical conditions. The implicit assumption that acclimatization is beneficial has not been tested for scleractinians, although it has been investigated in other systems and has been referred to as the beneficial acclimation hypothesis (BAH). This study tests this hypothesis for scleractinians in experiments on massive Porites spp. from Moorea, French Polynesia (17° 28.564S, 149° 49.018 W). Corals were acclimated for 15-21 days to three temperatures within the range experienced in the collection habitat and then transferred to each of the same temperatures for a treatment period of 14-15 days. The response of the holobiont was measured as growth, the response of the Symbiodinium populations as maximum photochemical efficiency of open reaction centers Ⅱ (F_v/F_m). An ANOVA with polynomial contrasts was used to distinguish among the BAH, three alternative hypotheses and a null hypothesis describing the consequences of acclimation. In the first experiment (2009), massive Porites spp. were unresponsive to temperature. In the second experiment (2013), the BAH was not supported, but growth of the holobiont conformed to the "hotter is better" (HIB) hypothesis; the response of Symbiodinium populations conformed to developmental buffering. These results suggest that acclimation by massive Porites spp. to temperatures experienced routinely in the natural environment does not have clear beneficial value for growth or photochemical efficiency (i.e., BAH was not supported), but they reveal that acclimation to increased temperature can have value in responding to a variety of subsequent temperatures (i.e., support for HIB).
机译：随着气候变化对珊瑚礁的影响，人们对注意力的关注程度已逐渐提高，以至于巩膜珊瑚可以适应新的自然条件。尽管在其他系统中已经进行过研究，但驯化师是否有益的隐含假设尚未得到检验，尽管这已在其他系统中进行了研究，并且被称为有益驯化假设（BAH）。这项研究在大型Porites spp的实验中检验了Scleractinians的假设。来自法属波利尼西亚的莫雷阿岛（17°28.564S，149°49.018 W）。使珊瑚适应收集栖息地所经历的范围内的三个温度15-21天，然后转移到每个相同的温度14-15天的处理时间。整体生物的响应以生长为度量，共生菌群的响应以开放反应中心Ⅱ的最大光化学效率（F_v / F_m）作为测量。具有多项式对比的方差分析用于区分BAH，三个备选假设和描述适应后果的零假设。在第一个实验（2009年）中，大量的Porites物种。对温度没有反应。在第二个实验（2013年）中，BAH没有得到支持，但是整体盐的生长符合“越热越好”（HIB）假说。共生菌种群的反应符合发育缓冲。这些结果表明由大量的Porites spp适应。自然环境中常规经历的温度对生长或光化学效率没有明显的有益价值（即不支持BAH），但它们表明适应升高的温度可以对各种后续温度做出响应（即，对HIB的支持）。

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  • 来源
    《Marine biology》 |2014年第7期|1531-1542|共12页
  • 作者

    Peter J. Edmunds;

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    Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA 91330-8303,USA;

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