Ocean acidification and warming affect skeletal mineralization in a marine fish
Ocean acidification and warming affect skeletal mineralization in a marine fish
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DOI：
10.1098/rspb.2018.2187
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发表时间：
2019-01-02
影响因子：
4.7
通讯作者：
Di Santo, Valentina
中科院分区：
文献类型：
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作者：
Di Santo, Valentina
众所周知，海洋酸化和变暖会改变，在许多情况下会降低贝壳和珊瑚礁建造海洋无脊椎动物的钙化率。然而，迄今为止，还没有关于海洋pH值和温度对鱼类等海洋脊椎动物骨骼矿化的综合影响的数据集。在这里，卵生海洋鱼类的胚胎，小鳐（Leucoraja erinacea），在发育过程中适应了当前和增加的温度和CO2条件，预计到2100年（15和20摄氏度，约100度）。分别为400和1100 μ atm）。利用显微计算机断层扫描，羟基磷灰石密度估计矿化部分的软骨在颌骨，小腿，椎骨，denatrium和胸鳍的少年冰鞋。矿化增加的结果高CO2在软骨的脚和下巴，而温度降低矿化的胸鳍。矿化作用线性地影响骨骼元素的刚度和强度，并影响进食和运动性能和效率。据我所知，这项研究是第一个量化鱼骨骼中矿化的显着变化的研究，并表明海洋温度和pH值的变化对鱼骨骼形态有复杂的影响。
Ocean acidification and warming are known to alter, and in many cases decrease, calcification rates of shell and reef building marine invertebrates. However, to date, there are no datasets on the combined effect of ocean pH and temperature on skeletal mineralization of marine vertebrates, such as fishes. Here, the embryos of an oviparous marine fish, the little skate (Leucoraja erinacea), were developmentally acclimatized to current and increased temperature and CO2 conditions as expected by the year 2100 (15 and 20 degrees C, approx. 400 and 1100 mu atm, respectively), in a fully crossed experimental design. Using micro-computed tomography, hydroxyapatite density was estimated in the mineralized portion of the cartilage in jaws, crura, vertebrae, denticles and pectoral fins of juvenile skates. Mineralization increased as a consequence of high CO2 in the cartilage of crura and jaws, while temperature decreased mineralization in the pectoral fins. Mineralization affects stiffness and strength of skeletal elements linearly, with implications for feeding and locomotion performance and efficiency. This study is, to my knowledge, the first to quantify a significant change in mineralization in the skeleton of a fish and shows that changes in temperature and pH of the oceans have complex effects on fish skeletal morphology.