title: Regional patterns of (15)N natural abundance in forest ecosystems along a large transect in eastern China.
abstract: The regional determining factors underlying inter- and intra-site variation of (15)N natural abundance in foliage, O horizon and mineral soil were investigated in eastern China.(15)N natural abundance values for these forest ecosystems were in the middle of the range of values previously found for global forest ecosystems. In contrast to commonly reported global patterns, temperate forest ecosystems were significantly more(15)N-enriched than tropical forest ecosystems, and foliage δ(15)N was negatively correlated with increasing mean annual temperature and net soil N mineralisation in eastern China. Tight N cycling in forest ecosystems and the use of atmospheric N deposition by trees might underlie the δ(15)N distribution patterns in eastern China. The existence of mycorrhizal fungi and root distribution profiles in the soil may also influence the(15)N natural abundance patterns in forest ecosystems of eastern China.
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Wenping
authors.initials: W
authors.lastname: Sheng
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Guirui
authors.initials: G
authors.lastname: Yu
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Huajun
authors.initials: H
authors.lastname: Fang
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Yingchun
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Qiufeng
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China.
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
mesh_terms: D001417:Background Radiation; D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring; D009587:Nitrogen Isotopes / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D014197:Trees / Q000737:chemistry*
chemical_list: D009587:Nitrogen Isotopes; D012987:Soil