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More than local adaptation: high diversity of response to seawater acidification in seven coral species from the same assemblage in French Polynesia
Journal of the Marine Biological Association of the United Kingdom ( IF 1.2 ) Pub Date : 2021-09-16 , DOI: 10.1017/s0025315421000618
Mathilde Godefroid 1 , Robin Arçuby 2 , Yann Lacube 2 , Benoit Espiau 2 , Sam Dupont 3 , Frédéric Gazeau 4 , Marc Metian 5 , Laetitia Hédouin 2
Affiliation  

Responses of corals to seawater acidification have been extensively studied. Sensitivity varies widely between species, highlighting the need to avoid extrapolation from one to another to get an accurate understanding of coral community responses. We tested the responses of seven coral species (Acropora cytherea, Acropora hyacinthus, Acropora pulchra, Leptastrea pruinosa, Montipora grisea, Pavona cactus, Pocillopora verrucosa) from the Mo'orea lagoon to a 48-day exposure to three pH scenarios (pH 7.95, 7.7 and 7.3). Tissue necrosis, mortality, growth rates, photophysiological performances and colour index were recorded. Few significant differences were noted between pH 7.95 and 7.7, but species-specific responses were observed at pH 7.3. While our data do not allow identification of the mechanisms behind this diversity in response between species inhabiting the same environment, it can exclude several hypotheses such as local adaptation, skeletal type, corallum morphology or calcification rate as sole factors determining coral sensitivity to pH.

中文翻译:

不仅仅是局部适应:法属波利尼西亚同一群珊瑚中七种珊瑚对海水酸化反应的高度多样性

珊瑚对海水酸化的反应已被广泛研究。物种之间的敏感性差异很大,强调需要避免从一个到另一个外推,以准确了解珊瑚群落的反应。我们测试了七种珊瑚物种的反应(鹿角珊瑚,鹿角风信子,鹿角珊瑚,紫刺桐,灰蒙蒂波拉,帕沃纳仙人掌,疣状毛茛) 从 Mo'orea 泻湖到 48 天暴露于三种 pH 值情景(pH 7.95、7.7 和 7.3)。记录组织坏死、死亡率、生长速率、光生理性能和颜色指数。在 pH 7.95 和 7.7 之间几乎没有发现显着差异,但在 pH 7.3 时观察到物种特异性反应。虽然我们的数据不允许识别栖息在同一环境中的物种之间反应多样性背后的机制,但它可以排除一些假设,如局部适应、骨骼类型、珊瑚形态或钙化率作为决定珊瑚对 pH 值敏感性的唯一因素。
更新日期:2021-09-16
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