Light availability determines susceptibility of reef building corals to ocean acidification
Light availability determines susceptibility of reef building corals to ocean acidification
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光的可用性决定了造礁珊瑚对海洋酸化的敏感性
DOI：
10.1007/s00338-012-0996-7
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发表时间：
2012
期刊：
影响因子：
3.5
通讯作者：
Suggett D
中科院分区：
文献类型：
--
作者：
Suggett D
海水pCO 2升高，进而海洋酸化（OA），现在被广泛认为会减少钙化和珊瑚礁建筑珊瑚的生长。与其他环境因素一样（例如，温度和营养物），光的可用性从根本上调节钙化，并预测通过改变物理过程（例如，海平面上升和浊度）;然而，光在调节OA诱导的钙化减少中的任何潜在作用仍然未知。我们采用了多因素的生长实验，以确定如何光强度和二氧化碳分压一起修改钙化模型珊瑚物种从两个关键属，鹿角珊瑚horridaandPorites cylindrica，占据类似的生态位，但具有不同的生理。我们发现，pCO 2（OA）升高诱导的钙化损失在光照（GL）下而不是黑暗（GD）下在低光生长条件下最大，特别是对于A。可怕。因此，强光生长条件抑制了OA对GL的影响，但对GD没有影响。总光合作用（PG）对GL的响应呈反相关，表明在强光条件下，OA缓解了PG的pCO 2限制，从而有效地提高了GL。过去OA实验的多变量分析用于评估我们的测试物种响应是否更广泛地适用于它们各自的属。事实上，生长的光强度被确定为影响OA诱导的Acroporabut而不是Porites物种钙化下降的重要因素。虽然低光照条件可以为硬珊瑚提供避难所，使其免受热和光的压力，但我们的研究表明，较低的光照可能会增加关键珊瑚物种对OA的易感性。
Elevated seawaterpCO2, and in turn ocean acidification (OA), is now widely acknowledged to reduce calcification and growth of reef building corals. As with other environmental factors (e.g., temperature and nutrients), light availability fundamentally regulates calcification and is predicted to change for future reef environments alongside elevatedpCO2via altered physical processes (e.g., sea level rise and turbidity); however, any potential role of light in regulating the OA-induced reduction of calcification is still unknown. We employed a multifactorial growth experiment to determine how light intensity andpCO2together modify calcification for model coral species from two key genera,Acropora horridaandPorites cylindrica, occupying similar ecological niches but with different physiologies. We show that elevatedpCO2(OA)-induced losses of calcification in the light (GL) but not darkness (GD) were greatest under low-light growth conditions, in particular forA. horrida. High-light growth conditions therefore dampened the impact of OA uponGLbut notGD. Gross photosynthesis (PG) responded in a reciprocal manner toGLsuggesting OA-relievedpCO2limitation ofPGunder high-light growth conditions to effectively enhanceGL. A multivariate analysis of past OA experiments was used to evaluate whether our test species responses were more widely applicable across their respective genera. Indeed, the light intensity for growth was identified as a significant factor influencing the OA-induced decline of calcification for species ofAcroporabut notPorites. Whereas low-light conditions can provide a refuge for hard corals from thermal and light stress, our study suggests that lower light availability will potentially increase the susceptibility of key coral species to OA.
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气候变化阻碍石珊瑚作为主要珊瑚礁生态系统工程师
影响因子：
1.8
作者：
C. Wild;O. Hoegh‐Guldberg;M. Naumann;M. F. Colombo;M. Ateweberhan;W. Fitt;R. Iglesias;C. Palmer;J. Bythell;J. Ortíz;Y. Loya;R. van Woesik
通讯作者：
R. van Woesik
DOI：
10.1073/pnas.1007273107
发表时间：
2010-11-23
影响因子：
11.1
作者：
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通讯作者：
Langdon, Chris
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影响因子：
3.5
作者：
R. Dunne;Barbara E. Brown
通讯作者：
Barbara E. Brown
影响因子：
56.9
作者：
De'ath, Glenn;Lough, Janice M.;Fabricius, Katharina E.
通讯作者：
Fabricius, Katharina E.
DOI：
10.1073/pnas.0408921102
发表时间：
2005-02-01
影响因子：
11.1
作者：
Muscatine, L;Goiran, C;Allemand, D
通讯作者：
Allemand, D