我组成员在 Global Change Biology 上发表文章：Ang Wang, Dexiang Chen, Oliver L. Phillips, Per Gundersen, Xulun Zhou, Geshere A. Gurmesa, Shanlong Li, Weixing Zhu, Erik A. Hobbie, Xueyan Wang, Yunting Fang. Dynamics and multi‐annual fate of atmospherically deposited nitrogen in montane tropical forests[J]. Global Change Biology, 2021. 

　　文章链接：https://onlinelibrary.wiley.com/doi/full/10.1111/gcb.15526 

　　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 ¹⁵N tracers, the long-term fate and redistribution of deposited N in tropical forests remains unknown. Here, we applied ¹⁵N tracers to examine the fates of deposited ammonium and nitrate separately over 3 years in a primary and a secondary tropical montane forest in southern China. Three months after ¹⁵N tracer addition, over 60% of ¹⁵N 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 ¹⁵N recovery in plants increased from 10% to 19% and 13% to 22% in the primary and secondary forests, respectively, while ¹⁵N recovery in the organic soil declined from 16% to 2% and 9% to 2%. Mineral soil retained 50% and 35% of ¹⁵N 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 ¹⁵NO₃^-. Mineral soil did not differ in ¹⁵NH₄⁺ and ¹⁵NO₃^- retention. Compared to temperate forests, proportionally more ¹⁵N 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.