Ocean acidification weakens the structural integrity of coralline algae.
Ocean acidification weakens the structural integrity of coralline algae.
复制标题
海洋酸化削弱了珊瑚藻的结构完整性。
DOI：
10.1111/j.1365-2486.2012.02756.x
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发表时间：
2012
影响因子：
11.6
通讯作者：
Ragazzola F
中科院分区：
文献类型：
--
作者：
Ragazzola F
人为排放的二氧化碳的吸收导致碳酸盐饱和状态的降低和海洋ph值的下降。了解海洋钙化生物（如珊瑚藻）如何适应海洋酸化，对于了解它们在未来一个世纪的生存至关重要。我们提出了第一个关于冷水珊瑚藻的长期扰动实验，它们是海底生态系统中重要的海洋钙化剂，特别是在高纬度地区。Lithothamnion冰川在孵育3个月后，即使在不饱和条件下也继续钙化，随着二氧化碳浓度的增加，其生长速度明显下降。然而，超结构的主要变化发生在589 μatm（即在饱和水中）。在这些高水平下生长的藻类的有限元模型显示，当受到与环境水平下生长的藻类相似的载荷时，总应变能增加了近一个数量级，并且骨骼内部的应力分布不均匀。这种结构的削弱可能会降低藻类抵抗捕食者和波浪能量的能力，在不久的将来（50年）对底栖生物群落结构造成严重后果。
The uptake of anthropogenic emission of carbon dioxide is resulting in a lowering of the carbonate saturation state and a drop in ocean pH. Understanding how marine calcifying organisms such as coralline algae may acclimatize to ocean acidification is important to understand their survival over the coming century. We present the first long‐term perturbation experiment on the cold‐water coralline algae, which are important marine calcifiers in the benthic ecosystems particularly at the higher latitudes.Lithothamnion glaciale,after three months incubation, continued to calcify even in undersaturated conditions with a significant trend towards lower growth rates with increasingpCO2. However, the major changes in the ultra‐structure occur by 589 μatm (i.e. in saturated waters). Finite element models of the algae grown at these heightened levels show an increase in the total strain energy of nearly an order of magnitude and an uneven distribution of the stress inside the skeleton when subjected to similar loads as algae grown at ambient levels. This weakening of the structure is likely to reduce the ability of the alga to resist boring by predators and wave energy with severe consequences to the benthic community structure in the immediate future (50 years).