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Changes in soil or air temperature lead to dynamics of alpine plant biomass associated with phenological or growth patterns
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  • Shuai Li,
  • Shikui Dong,
  • Yongshuo Fu,
  • Bingrong Zhou,
  • shiliang Liu,
  • Hao Shen,
  • Yudan Xu,
  • Xiaoxia Gao,
  • Jiannan Xiao,
  • Shengnan Wu ,
  • Fu Li
Shuai Li
Shanxi Agricultural University
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Shikui Dong
Beijing Forestry University

Corresponding Author:dongshikui@bjfu.edu.cn

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Yongshuo Fu
Beijing Normal University
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Bingrong Zhou
Qinghai Institute of Meteorology Sciences
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shiliang Liu
School of Environment, Beijing Normal University
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Hao Shen
Beijing Normal University
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Yudan Xu
Beijing Normal University
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Xiaoxia Gao
Beijing Normal University
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Jiannan Xiao
Beijing Normal University
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Shengnan Wu
Beijing Forestry University
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Fu Li
Qinghai Institute of Meteorology Sciences
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Abstract

Understanding the effects of climate change on plant phenological dynamics and growth patterns is critical for predicting climatic changes on the Qinghai-Tibetan Plateau (QTP). We used data over 21 years (1997 to 2017) for four dominant species on the QTP, namely Astragalus laxmannii (legume), Artemisia scoparia (forb), Kobresia humilis (sedge), Stipa purpurea (grass), and examined the relationships among climatic changes, plant phenology, growth pattern, and biomass. Most phenological periods in Stipa purpurea and Artemisia scoparia were delayed, whereas in Astragalus laxmannii, they were advanced. Soil temperature and maximum air temperature were the most important drivers. There were trade-offs between reproductive phenology and vegetative phenology, as well as between the length of the rapid growth period and the intrinsic growth rate. The impacts of the phenological or growth processes were species-specific. Our findings provide evidence of long-term changes and are of great significance for improving the accuracy of models.