Global changes alter plant multi-element stoichiometric coupling

Dashuan Tian, Peter B. Reich, Han Y.H. Chen, Yangzhou Xiang, Yiqi Luo, Ying Shen, Cheng Meng, Wenxuan Han, Shuli Niu

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

Plant stoichiometric coupling among all elements is fundamental to maintaining growth-related ecosystem functions. However, our understanding of nutrient balance in response to global changes remains greatly limited to plant carbon : nitrogen : phosphorus (C : N : P) coupling. Here we evaluated nine element stoichiometric variations with one meta-analysis of 112 global change experiments conducted across global terrestrial ecosystems and one synthesis over 1900 species observations along natural environment gradients across China. We found that experimentally increased soil N and P respectively enhanced plant N : potassium (K), N : calcium (Ca) and N : magnesium (Mg), and P : K, P : Ca and P : Mg, and natural increases in soil N and P resulted in qualitatively similar responses. The ratios of N and P to base cations decreased both under experimental warming and with naturally increasing temperature. With decreasing precipitation, these ratios increased in experiments but decreased under natural environments. Based on these results, we propose a new stoichiometric framework in which all plant element contents and their coupling are not only affected by soil nutrient availability, but also by plant nutrient demand to maintain diverse functions under climate change. This study offers new insights into understanding plant stoichiometric variations across a full set of mineral elements under global changes.

Original languageEnglish (US)
Pages (from-to)807-817
Number of pages11
JournalNew Phytologist
Volume221
Issue number2
DOIs
StatePublished - Jan 2019

Keywords

  • global changes
  • macroelement
  • meta-analysis
  • microelement
  • natural environmental variation
  • nutrient balance
  • plant functions
  • soil nutrient

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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  • Cite this

    Tian, D., Reich, P. B., Chen, H. Y. H., Xiang, Y., Luo, Y., Shen, Y., Meng, C., Han, W., & Niu, S. (2019). Global changes alter plant multi-element stoichiometric coupling. New Phytologist, 221(2), 807-817. https://doi.org/10.1111/nph.15428