文献类型： 外文期刊

作者： Xiu, Bin ¹ ; Liang, Sheng-kang ¹ ; He, Xing-liang ⁴ ; Wang, Xin-ke ¹ ; Cui, Zheng-guo ⁵ ; Jiang, Zhi-jian ⁶ ;

作者机构： 1.Ocean Univ China, Coll Chem & Chem Engn, Qingdao 266100, Peoples R China

2.State Ocean Adm China, Shenzhen Marine Environm Monitoring Ctr, Shenzhen 266100, Peoples R China

3.Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao 266100, Peoples R China

4.China Geol Sevey, Qingdao Inst Marine Geol, Qingdao 266071, Peoples R China

5.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

6.Chinese Acad Sci, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China

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.