Goffredo Stefano, Prada Fiorella, Caroselli Erik, Capaccioni Bruno, Zaccanti Francesco, Pasquini Luca, Fantazzini Paola, Fermani Simona, Reggi Michela, Levy Oren, Fabricius Katharina E, Dubinsky Zvy, Falini Giuseppe
Marine Science Group, Department of Biological, Geological and Environmental Sciences, Section of Biology, Alma Mater Studiorum - University of Bologna, Via F. Selmi 3, 40126 Bologna, Italy.
Department of Biological, Geological and Environmental Sciences, Section of Geology, Alma Mater Studiorum - University of Bologna, Piazza di Porta S. Donato 1, 40127 Bologna, Italy.
Nat Clim Chang. 2014 Jul 1;4(7):593-597. doi: 10.1038/nclimate2241.
Anthropogenic CO is a major driver of current environmental change in most ecosystems, and the related ocean acidification (OA) is threatening marine biota. With increasing pCO, calcification rates of several species decrease, although cases of up-regulation are observed. Here, we show that biological control over mineralization relates to species abundance along a natural pH gradient. As pCO increased, the mineralogy of a scleractinian coral () and a mollusc () did not change. In contrast, two calcifying algae ( and ) reduced and changed mineralization with increasing pCO, from aragonite to the less soluble calcium sulphates and whewellite, respectively. As pCO increased, the coral and mollusc abundance was severely reduced, with both species disappearing at pH < 7.8. Conversely, the two calcifying and a non-calcifying algae () showed less severe or no reductions with increasing pCO, and were all found at the lowest pH site. The mineralization response to decreasing pH suggests a link with the degree of control over the biomineralization process by the organism, as only species with lower control managed to thrive in the lowest pH.
人为排放的一氧化碳是当前大多数生态系统环境变化的主要驱动因素，与之相关的海洋酸化（OA）正威胁着海洋生物群。随着pCO的增加，尽管观察到有上调的情况，但几种物种的钙化率仍会下降。在此，我们表明生物对矿化的控制与沿自然pH梯度的物种丰度有关。随着pCO的增加，一种石珊瑚（）和一种软体动物（）的矿物学并未改变。相反，两种钙化藻类（和）随着pCO的增加，分别从文石转变为溶解度较低的硫酸钙和草酸钙，从而减少并改变了矿化。随着pCO的增加，珊瑚和软体动物的丰度大幅降低，在pH < 7.8时这两个物种均消失。相反，两种钙化藻类和一种非钙化藻类（）随着pCO的增加，丰度降低程度较小或没有降低，并且在pH最低的位点均有发现。对pH降低的矿化反应表明与生物体对生物矿化过程的控制程度有关，因为只有控制程度较低的物种才能在最低pH环境中茁壮成长。
