Rainfall partitioning and associated nitrate and sulfate fluxes along a slope gradient in a subtropical broadleaved forest
Rainfall partitioning and associated nitrate and sulfate fluxes along a slope gradient in a subtropical broadleaved forest
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亚热带阔叶林沿坡度梯度的降雨分配及相关硝酸盐和硫酸盐通量
DOI：
10.1016/j.jhydrol.2020.125584
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发表时间：
2020-12
影响因子：
6.4
通讯作者：
Xinchao Sun
中科院分区：
文献类型：
--
作者：
Xiaoqiang Lu;Yan Liu;Li Liu;Zhao Zhang;Feilong Hu;Xueyan Liu;Xinchao Sun
Forest canopies create a high spatial variability of both canopy interception (Ei) and acid deposition. However, spatial characteristics of these hydrochemical fluxes along a slope gradient in forest watersheds remain unclear. Here we monitored bulk precipitation (BP), throughfall (TF), stemflow (SF), and associated nitrate (NO3−) and sulfate (SO42−) in an upper slope plot (UP) and a lower slope plot (LP) in a subtropical broadleaved forest, Southeast China. Results showed that annual rates ofTF,SFandEitoBPin UP were 85.2%, 2.6%, and 12.2%, respectively. Corresponding values in LP were 88.6%, 2.2%, and 9.2%. There were no significant differences among these rainfall partitioning components between UP and LP. Additionally, annual volume weighted mean concentrations of NO3−-N inTFandSFwere significantly lower than inBP, whereas no significant differences were found for SO42−-S amongBP,TFandSF. Unlike annualTFNO3−-N fluxes were similar in UP and LP, annualTFSO42−-S fluxes significantly increased along the UP to LP. NetTF+SF(NTF) fluxes were negative for NO3−-N and SO42−-S at the two slope plots, illustrating retained/uptake in the canopy. Dormant season NTF S fluxes were close to zero, indicating that dry deposition does not appear to play a major role, whereas exchange with foliage surfaces should be the dominant factor controlling the spatial patterns ofTFN and S fluxes in the watershed. This study can contribute to the evaluation of watershed-scale water and acidifying input into the soil during canopy passage, and further consequent effects on forest ecosystems.
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影响因子：
2.7
作者：
J. Sparks
通讯作者：
J. Sparks
影响因子：
8.9
作者：
Qian Yu;L. Duan;Longfei Yu;Xiao Chen;Gaoyue Si;Piaopiao Ke;Zhixiang Ye;J. Mulder
通讯作者：
Qian Yu;L. Duan;Longfei Yu;Xiao Chen;Gaoyue Si;Piaopiao Ke;Zhixiang Ye;J. Mulder
影响因子：
6.4
作者：
A. Zimmermann;S. Germer;C. Neill;A. Krusche;H. Elsenbeer
通讯作者：
A. Zimmermann;S. Germer;C. Neill;A. Krusche;H. Elsenbeer
亚高山龙云杉人工林从封闭树冠到林隙边缘树冠的硫酸盐沉积拦截
影响因子：
2.5
作者：
Zhang Yu;Wu Fuzhong;Tan Bo;Xu Zhenfeng;Li Han;Liu Juncheng;Zhao Hairong;Tan Siyi;You Chengming;Yang Wanqin
通讯作者：
Yang Wanqin
影响因子：
3
作者：
N. Ignatova;E. Dambrine
通讯作者：
N. Ignatova;E. Dambrine