整合生物学期刊网

林业研究(英文版) ›› 2024, Vol. 35 ›› Issue (1): 76-.DOI: 10.1007/s11676-024-01731-9

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Jiacheng Zheng1,2, Jing Yang1,2, Hengfeng Jia1,2, Lixin Lyu1,d, Jiayang Langzhen1,2,3, Qi-Bin Zhang1,4   

  • 收稿日期:2023-10-10 接受日期:2024-01-25 出版日期:2024-10-16 发布日期:2024-10-16
  • 通讯作者: Lixin Lyu

Changes of growth-climate relationships of Smith fir forests along an altitudinal gradient

Jiacheng Zheng1,2, Jing Yang1,2, Hengfeng Jia1,2, Lixin Lyu1,d, Jiayang Langzhen1,2,3, Qi-Bin Zhang1,4   

  1. 1 State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, People’s Republic of China
    2 University of Chinese Academy of Sciences, 100049, Beijing, People’s Republic of China
    3 Linzhou Bureau of Meteorology, 851611, Linzhou, Lhasa, Tibet, People’s Republic of China
    4 Institute of Plateau Ecology, Tibet Agricultural and Animal Husbandry University, 860000, Linzhi, Tibet, People’s Republic of China
  • Received:2023-10-10 Accepted:2024-01-25 Online:2024-10-16 Published:2024-10-16
  • Contact: Lixin Lyu

Abstract:

Temporal changes in the relationship between tree growth and climate have been observed in numerous forests across the world. The patterns and the possible regulators (e.g., forest community structure) of such changes are, however, not well understood. A vegetation survey and analyses of growth-climate relationships for Abies georgei var. Smithii (Smith fir) forests were carried along an altitudinal gradient from 3600 to 4200 m on Meili Snow Mountain, southeastern Tibetan Plateau. The results showed that the associations between growth and temperature have declined since the 1970s over the whole transect, while response to standardized precipitation-evapotranspiration indices (SPEI) strengthened in the mid- and lower-transect. Comparison between growth and vegetation data showed that tree growth was more sensitive to drought in stands with higher species richness and greater shrub cover. Drought stress on growth may be increased by heavy competition from shrub and herb layers. These results show the non-stationary nature of tree growth-climate associations and the linkage to forest community structures. Vegetation components should be considered in future modeling and forecasting of forest dynamics in relation to climate changes.

Key words: Climate change, Tree rings, Altitudinal gradient, Community structure, Plant diversity