Nitrogen isotopes of organic nitrogen in reef coral skeletons as a proxy of tropical nutrient dynamics
Nitrogen isotopes of organic nitrogen in reef coral skeletons as a proxy of tropical nutrient dynamics
复制标题
珊瑚礁珊瑚骨骼中有机氮的氮同位素作为热带营养动态的代表
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
U. Tsunogai
中科院分区：
文献类型：
--
作者：
A. Yamazaki;Tsuyoshi Watanabe;U. Tsunogai
了解热带营养动态对于量化海洋生产力是至关重要的。然而，在热带和亚热带海洋，由于营养物质浓度低，对营养物质的空间和连续观测一直很少。珊瑚骨骼中有机氮的氮同位素(δ15N珊瑚)可以用来记录海洋表面氮营养物质的来源。这里，我们展示了西太平洋δ15N珊瑚的礁内和礁间变化。δ15N珊瑚在珊瑚礁内的带状分布与δ15N海水硝酸盐(δ15N硝酸盐)相对应。δ15N珊瑚在不同珊瑚礁中的扩展分析也显示出西太平洋从热带到温带的纬度梯度。δ15N珊瑚通过地质时间尺度记录了高分辨率的氮素营养动态。
Understanding tropical nutrient dynamics is essential for quantifying marine productivity. In tropical and subtropical oceans, however, the spatial and continuous observation of nutrients has been scarce because of low nutrient concentration. The nitrogen isotopes of organic nitrogen in coral skeletons (δ15Ncoral) could be used to record nitrogenous nutrient origins at oceanic surfaces. Here, we show the intra‐ and inter‐reef variations of δ15Ncoral in the western Pacific. The zonal distribution of δ15Ncoral was found inside a coral reef corresponding with δ15N of seawater nitrate (δ15Nnitrate). The extended analysis of δ15Ncoral among various coral reefs also shows a latitudinal gradient from tropical to temperate in the western Pacific. The δ15Ncoral records high‐resolution dynamics of nitrogenous nutrients through the geologic time scale.