文献类型：期刊文献

英文题名：Dynamics and multi-annual fate of atmospherically deposited nitrogen in montane tropical forests

作者：Wang, Ang[1] Chen, Dexiang[2] Phillips, Oliver L.[3] Gundersen, Per[4] Zhou, Xulun[1,5] Gurmesa, Geshere A.[1] Li, Shanlong[1] Zhu, Weixing[6] Hobbie, Erik A.[7] Wang, Xueyan[8] Fang, Yunting[1,9,10]

第一作者：Wang, Ang

通信作者：Fang, YT[1]

机构：[1]Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Shenyang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Trop Forestry, Hainan Jianfengling Forest Ecosyst Natl Field Sci, Guangzhou, Peoples R China;[3]Univ Leeds, Sch Geog, Leeds, W Yorkshire, England;[4]Univ Copenhagen, Dept Geosci & Nat Resource Management, Frederiksberg C, Denmark;[5]Northeastern Univ, Sch Resources & Civil Engn, Shenyang, Peoples R China;[6]SUNY Binghamton, Dept Biol Sci, Binghamton, NY USA;[7]Univ New Hampshire, Earth Syst Res Ctr, Morse Hall, Durham, NH USA;[8]Shenyang Inst Technol, Sch Energy & Water Resources, Fushun, Peoples R China;[9]Qingyuan Forest CERN, Shenyang, Peoples R China;[10]Key Lab Stable Isotope Techn & Applicat, Shenyang, Liaoning, Peoples R China

年份：2021

卷号：27

期号：10

起止页码：2076-2087

外文期刊名：GLOBAL CHANGE BIOLOGY

收录：;Scopus(收录号：2-s2.0-85101032127);WOS:【SCI-EXPANDED(收录号:WOS:000619530000001)】；

基金：Liaoning Vitalization Talents Program, Grant/Award Number: XLYC1902016; Strategic Priority Research Program of the Chinese Academy of Sciences, Grant/Award Number: XDA23070103; National Natural Science Foundation of China, Grant/Award Number: 31901134, 41773094, 31770498, 41811530305 and 41773071; National Key Research and Development Program of China, Grant/Award Number: 2016YFA0600802; Key Research Program of Frontier Sciences of Chinese Academy of Sciences, Grant/Award Number: QYZDB-SSW-DQC002; K.C. Wong Education Foundation, Grant/Award Number: GJTD-2018-07; Scientific Research Foundation of the Educational Department of Liaoning Province, Grant/Award Number: L201908

语种：英文

外文关键词：N-15 tracer; ammonium and nitrate; long‐ term fate; N deposition; N retention and redistribution; tropical montane forests

摘要：The effects of nitrogen (N) deposition on forests largely depend on its fate after entering the ecosystem. While several studies have addressed the forest fate of N deposition using N-15 tracers, the long-term fate and redistribution of deposited N in tropical forests remains unknown. Here, we applied N-15 tracers to examine the fates of deposited ammonium (NH4+) and nitrate (NO3-) separately over 3 years in a primary and a secondary tropical montane forest in southern China. Three months after N-15 tracer addition, over 60% of N-15 was retained in the forests studied. Total ecosystem retention did not change over the study period, but between 3 months and 3 years following deposition N-15 recovery in plants increased from 10% to 19% and 13% to 22% in the primary and secondary forests, respectively, while N-15 recovery in the organic soil declined from 16% to 2% and 9% to 2%. Mineral soil retained 50% and 35% of N-15 in the primary and secondary forests, with retention being stable over time. The total ecosystem retention of the two N forms did not differ significantly, but plants retained more 15NO3- than 15NH4+ and the organic soil more 15NH4+ than NO3-. Mineral soil did not differ in 15NH4+ and 15NO3- retention. Compared to temperate forests, proportionally more N-15 was distributed to mineral soil and plants in these tropical forests. Overall, our results suggest that atmospherically deposited NH4+ and NO3- is rapidly lost in the short term (months) but thereafter securely retained within the ecosystem, with retained N becoming redistributed to plants and mineral soil from the organic soil. This long-term N retention may benefit tropical montane forest growth and enhance ecosystem carbon sequestration.