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

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

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The Tongbai Mountains is an ecologically sensi-tive 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),late-wood width(LWW),and total ring width(TRW)of P.massoniana at two sampling sites on slopes with different orientations,then analyzed characteristics of the chronolo-gies and their correlations with climate variables from five stations in the region and with a regional normalized differ-ence vegetation index(NDVI).Statistical results showed that the TRW/EWW/LWW chronology consistency and charac-teristics(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.Step-wise 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 southeast-ern 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.

Tree-ringsPinus massoniana lambMicro-environmentRadial growthClimate-growth response

Jianfeng Peng、Jiayue Cui、Jinbao Li、Meng Peng、Yongtao Ma、Xiaoxu Wei、Jinkuan Li、Xuan Li、Yamen Liu、Jiaxin Li

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College of Geography and Environmental Science,Henan University,Kaifeng 475004,People's Republic of China

Key Laboratory of Earth System Observation and Simulation of Henan Province,Kaifeng 475004,People's Republic of China

Department of Geography,University of Hong Kong,Hong Kong,SAR,People's Republic of China

HKU Shenzhen Institute of Research and Innovation,Shenzhen 518057,People's Republic of China

Henan Academy of Forestry,Zhengzhou 450000,People's Republic of China

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国家重点研发计划国家自然科学基金国家自然科学基金

2018YFA06056014207741741671042

2024

10.1007/s11676-023-01658-7

林业研究(英文版)
东北林业大学,中国生态学学会

林业研究(英文版)

CSTPCDEI
影响因子：0.365
ISSN：1007-662X
年,卷(期)：2024.35(1)
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