Tissue-specific C-13 in ancient and modern tropical seabirds and flying fish in the Xisha Islands, South China Sea
Tissue-specific C-13 in ancient and modern tropical seabirds and flying fish in the Xisha Islands, South China Sea
复制标题
南海西沙群岛古代和现代热带海鸟和飞鱼中的组织特异性C-13
DOI：
10.1080/10256016.2018.1485675
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发表时间：
2018
影响因子：
1.3
通讯作者：
Liu Xiaodong
中科院分区：
文献类型：
--
作者：
Wu Libin;Xu Liqiang;Hou Shengjie;Wang Xueying;Fu Pingqing;Liu Xiaodong
我们分析了现代红足宝鱼(Sula Sula)的鸟类骨骼、羽毛、蛋壳碳酸盐和膜以及其主要食物来源飞鱼(Exocotus Volitans)和次要食物鱿鱼(Lolio Chinensis)的鱼肌肉、鳞片和骨骼以及中国群岛西沙群岛古代海鸟和飞鱼的亚化石样本中的13C特征。由于组织之间的周转不同以及不同组织中氨基酸类型和含量的差异，δ13C在海鸟和飞鱼中都具有组织特异性。热带海鸟和它们的猎物不同组织的δ13C识别因子也有显著差异。自古以来，在鸟类和鱼类的组织中观察到了由化石燃料燃烧和碳的排放引起的苏斯效应。我们的研究提供了食物链生物中δ13C的多重变异性指数，并验证了组织特异性13C分析对于识别食物和物种是必不可少的，因此是研究热带海鸟生态的有价值的工具。
We analyzed13C characteristics in samples of bird bones, feathers, eggshell carbonate and membrane from modern specimens of red-footed booby (Sula sula) as well as fish muscle, scales, and bones from its predominant food source, flying fish (Exocoetus volitans), and muscle from its secondary food source squid (Loligo chinensis), as well as in ancient sub-fossil samples of seabird and flying fish at the Xisha Islands, South China Sea.δ13C is tissue-specific in both seabirds and flying fish due to the variance in turn-over among the tissues and differences in the type and content of amino acids across a diverse range of tissues. Theδ13C discrimination factors also differed significantly among the various tissues between tropical seabirds and their prey. A Suess effect, caused by fossil fuel combustion and the emission of carbon with fewer13C isotopes, was observed in the bird and fish tissue from ancient to modern time. Our study provides a multiple variability index forδ13C in organisms along a food chain, and verifies that tissue-specific13C analysis is essential to identify diet and species and thus is a valuable tool for research on tropical seabird ecology.