文献类型： 外文期刊

第一作者： Xiu, Bin

作者： Xiu, Bin;Liang, Sheng-kang;Wang, Xin-ke;Xiu, Bin;Liang, Sheng-kang;He, Xing-liang;Cui, Zheng-guo;Jiang, Zhi-jian

作者机构：

关键词： Dissolved organic nitrogen; Uhler prolifera; Bioavailability; Stable isotopes; Uptake rate; Turnover time

期刊名称：MARINE POLLUTION BULLETIN （ 影响因子：5.553； 五年影响因子：5.907 ）

ISSN： 0025-326X

年卷期： 2019 年 140 卷

页码：

收录情况： SCI

摘要： To investigate bioavailability of dissolved organic nitrogen (DON) and its contribution to nitrogen demand for Ulva prolifera, a cruise was conducted during a bloom of U. prolifera in Qingdao coastal waters, China, dissolved inorganic nitrogen (DIN) and DON components were investigated. Uptakes of both DIN and DON by U. prolifera were synchronously measured onboard using stable isotope techniques. The contribution of DON to total dissolved N (TDN) was > 50% and that of labile components (urea and to amino acids, AA) to DON exceeded 30%. Both DIN and DON were utilized by U. prolifera, which uptake NH4-N preferentially, then urea, NO3-N and AA in turn; whereas the ranking of turnover times from short to long was AA, NH4-N, urea and NO3-N. The high uptake rates and short turnover time of AA and urea indicated that DON may play an important role in the nutrition of U. prolifera.

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