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Nitrogen isotopes of organic nitrogen in reef coral skeletons as a proxy of tropical nutrient dynamics

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Title: Nitrogen isotopes of organic nitrogen in reef coral skeletons as a proxy of tropical nutrient dynamics
Authors: Yamazaki, Atsuko Browse this author
Watanabe, Tsuyoshi Browse this author →KAKEN DB
Tsunogai, Urumu Browse this author →KAKEN DB
Issue Date: 12-Oct-2011
Publisher: American Geophysical Union
Journal Title: Geophysical Research Letters
Volume: 38
Start Page: L19605
Publisher DOI: 10.1029/2011GL049053
Abstract: 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 (δ15N_[coral]) could be used to record nitrogenous nutrient origins at oceanic surfaces. Here, we show the intra- and inter-reef variations of δ15N_[coral] in the western Pacific. The zonal distribution of δ15N_[coral] was found inside a coral reef corresponding with δ15N of seawater nitrate (δ15N_[nitrate]). The extended analysis of δ15N_[coral] among various coral reefs also shows a latitudinal gradient from tropical to temperate in the western Pacific. The δ15N_[coral] records high-resolution dynamics of nitrogenous nutrients through the geologic time scale.
Rights: Copyright 2011 by the American Geophysical Union
Type: article
URI: http://hdl.handle.net/2115/48992
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山崎 敦子

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