Plant Ecology

, Volume 220, Issue 2, pp 141–149 | Cite as

Response of plant functional traits of Leymus chinensis to extreme drought in Inner Mongolia grasslands

  • Xiyuan Yue
  • Xiaoan ZuoEmail author
  • Qiang Yu
  • Chong Xu
  • Peng Lv
  • Jing Zhang
  • Alan K. Knapp
  • Melinda D. Smith


Understanding the effects of climate change, in particular, climate extremes on plant functional traits can provide a mechanistic basis for predicting how plant communities may be altered in the future. Here, we focused on a dominant species in Inner-Mongolia typical temperate steppe, Leymus chinensis (Trin.) Tzvei, to examine the responses of plant functional traits to experimentally imposed extreme drought at three sites along an aridity gradient. When comparing the driest (high aridity) to the wettest sites (low aridity), plant height, leaf dry matter content and δ13C (water use efficiency) were increased at the intermediate and low aridity sites, whereas specific leaf area and leaf nitrogen content were reduced at the high-aridity site. When extreme drought (~ 66% reduction in the growing season precipitation) was experimentally imposed at all sites, plant height decreased and δ13C of L. chinensis increased at the intermediate and low aridity sites. The extreme drought of 66% precipitation reduction also increased leaf dry matter content in high- and low-aridity sites. Compared to the control (ambient precipitation), extreme drought increased the strength of the positive association between plant height and δ13C, as well as the negative associations of specific leaf area with plant height and leaf dry matter content. Thus, extreme drought altered key functional traits of the dominant grass of Inner Mongolia steppe, particularly at the low-aridity site where the drought decreased plant size and increased water use efficiency and affected relationships between these traits.


Climate extremes Precipitation gradient Leaf nitrogen content Specific leaf area Typical steppe 



We thank all the members of Urat Desert-grassland Research Station, Inner Mongolia Grassland Ecosystem Research Station (IMGERS), and Chinese Academy of Sciences (CAS), for their help with field work. This paper was financially supported by the National Natural Science Foundation of China (41622103, 41571106 and 41320104002) and China national key research and development plan (2016YFC0500506).

Supplementary material

11258_2018_887_MOESM1_ESM.docx (21 kb)
Supplementary material 1 (DOCX 20 kb)


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  1. 1.Urat Desert-grassland Research Station, Northwest Institute of Eco-Environment and ResourcesChinese Academy of ScienceLanzhouChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijingChina
  4. 4.State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and TechnologyLanzhou UniversityLanzhouChina
  5. 5.Department of Biology, Graduate Degree Program in EcologyColorado State UniversityFort CollinsUSA

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