整合生物学期刊网

林业研究(英文版) ›› 2024, Vol. 35 ›› Issue (1): 26-.DOI: 10.1007/s11676-023-01658-7

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Jianfeng Peng1,2,a, Jiayue Cui1, Jinbao Li3,4, Meng Peng1, Yongtao Ma5, Xiaoxu Wei1, Jinkuan Li1, Xuan Li1, Yamen Liu1, Jiaxin Li1   

  • 收稿日期:2023-03-20 接受日期:2023-06-28 出版日期:2024-10-16 发布日期:2024-10-16
  • 通讯作者: Jianfeng Peng

Microenvironmental effects on growth response of Pinus massoniana to climate at its northern boundary in the Tongbai Mountains, Central China

Jianfeng Peng1,2,a, Jiayue Cui1, Jinbao Li3,4, Meng Peng1, Yongtao Ma5, Xiaoxu Wei1, Jinkuan Li1, Xuan Li1, Yamen Liu1, Jiaxin Li1   

  1. 1 College of Geography and Environmental Science, Henan University, 475004, Kaifeng, People’s Republic of China
    2 Key Laboratory of Earth System Observation and Simulation of Henan Province, 475004, Kaifeng, People’s Republic of China
    3 Department of Geography, University of Hong Kong, Hong Kong, SAR, People’s Republic of China
    4 HKU Shenzhen Institute of Research and Innovation, 518057, Shenzhen, People’s Republic of China
    5 Henan Academy of Forestry, 450000, Zhengzhou, People’s Republic of China
  • Received:2023-03-20 Accepted:2023-06-28 Online:2024-10-16 Published:2024-10-16
  • Contact: Jianfeng Peng

Abstract:

The Tongbai Mountains is an ecologically sensitive region and the northern boundary of Pinus massoniana Lamb. To analyze the effect of different microenvironments on tree growth response to climate factors, we developed standard chronologies for earlywood width (EWW), latewood width (LWW), and total ring width (TRW) of P. massoniana at two sampling sites on slopes with different orientations, then analyzed characteristics of the chronologies and their correlations with climate variables from five stations in the region and with a regional normalized difference vegetation index (NDVI). Statistical results showed that the TRW/EWW/LWW chronology consistency and characteristics (mean sensitivity, signal to noise ratio, expressed population signal) for trees growing on the southeastern slope were much higher than for trees on the northeastern slope. Correlations indicated that temperature in current March and August has a significant positive effect on TRW/EWW/LWW formation, and the effect on the northeastern slope was weaker than on the southeastern slope. Compared to temperature, precipitation has more complicated effects on tree growth, but the effect on the northeastern slope was also generally weaker than on the southeastern slope. Stepwise linear regression analyses showed that temperature in August was the main limiting factor at the two sampling sites. Similarly, the response of tree growth on the southeastern slope as determined by the NDVI is better than on the northeastern slope, and the TRW/EWW/LWW chronologies for the southeastern slope explained over 50% of the total NDVI variances in June. Overall, the results indicate that the difference in the climate response of P. massoniana at two sampling sites is clearly caused by differences in the microenvironment, and such differences should be properly considered in future studies of forest dynamics and climate reconstructions.

Key words: Tree-rings, Pinus massoniana lamb, Micro-environment, Radial growth, Climate-growth response