title: Inorganic nitrogen wet deposition: Evidence from the North-South Transect of Eastern China.
abstract: We examined the spatio-temporal variation of dissolved inorganic nitrogen (DIN) deposition in eight typical forest ecosystems of Eastern China for three consecutive years. DIN deposition exhibited an increasing gradient from north to south, with N-NH4(+) as the predominant contributor. DIN deposition in precipitation changed after interaction with the forest canopy, and serious ecological perturbations are expected in this region. DIN deposition presented seasonal fluctuations, which might be ascribed to agricultural activity, fossil-fuel combustion and environmental factors (i.e., wind direction, soil temperature). Notably, N fertilizer use (FN), energy consumption (E), and precipitation (P) jointly explained 84.3% of the spatial variation in DIN deposition, of which FN (27.2%) was the most important, followed by E (24.8%), and finally P (9.3%). The findings demonstrate that DIN deposition is regulated by precipitation mainly via anthropogenic N emissions, and this analysis provides decision-makers a novel view for N pollution abatement.
authors.affiliation: Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
authors.forename: X
authors.initials: X
authors.lastname: Zhan
authors.affiliation: Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: yugr@igsnrr.ac.cn.
authors.forename: G
authors.initials: G
authors.lastname: Yu
authors.affiliation: Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
authors.forename: N
authors.initials: N
authors.lastname: He
authors.affiliation: Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
authors.forename: B
authors.initials: B
authors.lastname: Jia
authors.affiliation: College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot 010019, China.
authors.forename: M
authors.initials: M
authors.lastname: Zhou
authors.affiliation: College of Forestry, Northeast Forestry University, Harbin 150040, China.
authors.forename: C
authors.initials: C
authors.lastname: Wang
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Institute of Forest Ecology Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China.
authors.forename: G
authors.initials: G
authors.lastname: Zhao
authors.affiliation: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
authors.forename: S
authors.initials: S
authors.lastname: Wang
authors.affiliation: Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Liu
authors.affiliation: South China Botany Garden, Chinese Academy of Sciences, Guangzhou 510650, China.
authors.forename: J
authors.initials: J
authors.lastname: Yan
mesh_terms: D000397:Air Pollution; D002681:China; D004784:Environmental Monitoring; D065928:Forests; D006802:Human Activities; D009584:Nitrogen / Q000032:analysis*; D011891:Rain; D012987:Soil; D014919:Wind
chemical_list: D012987:Soil; D009584:Nitrogen
keywords: Anthropogenic activity; Critical load; Eastern China; Forest ecosystem; Nitrogen deposition