Effects of Plant Functional Types, Climate and Soil Nitrogen on Leaf Nitrogen along the North-South Transect of Eastern China

  • 1 Synthesis Research Center of Chinese Ecosystem Research Network, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2013-03-26

  Revised date: 2013-05-16

  Online published: 2013-06-20

Supported by

this work was supported by the National Key Research and Development Program (2010CB833504), and the CAS Strategic Priority Research Program (XDA05050602).


We conducted a systematic census of leaf N for 102 plant species at 112 research sites along the North-South Transect of Eastern China (NSTEC) following the same protocol, to explore how plant functional types (PFTs) and environmental factors affect the spatial pattern of leaf N. The results showed that mean leaf N was 17.7 mg g-1 for all plant species. The highest and lowest leaf N were found in deciduous-broadleaf and evergreen-conifer species, respectively, and the ranking of leaf N from high to low was: deciduous > evergreen species, broadleaf > coniferous species, shrubs ≈ trees > grasses. For all data pooled, leaf N showed a convex quadratic response to mean annual temperature (MAT), and a negative linear relationship with mean annual precipitation (MAP), but a positive linear relationship with soil nitrogen concentration (Nsoil). These patterns were similar when PFTs were examined individually. Importantly, PFTs, climate and Nsoil jointly explained 46.1% of the spatial variation in leaf N, of which the independent explanatory powers of PFTs, climate and Nsoil were 15.6%, 2.3% and 4.7%, respectively. Our findings suggest that leaf N is regulated by climate and Nsoil mainly via plant species composition. The wide scale empirical relationships developed here are useful for understanding and modeling of the effects of PFTs and environmental factors on leaf N.

Cite this article

ZHAN Xiaoyun, YU Guirui, HE Nianpeng . Effects of Plant Functional Types, Climate and Soil Nitrogen on Leaf Nitrogen along the North-South Transect of Eastern China[J]. Journal of Resources and Ecology, 2013 , 4(2) : 125 -131 . DOI: 10.5814/j.issn.1674-764x.2013.02.004


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