Journal of Plant Ecology ›› 2025, Vol. 18 ›› Issue (3): 1-15.DOI: 10.1093/jpe/rtaf042

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中国南北过渡带油松生长对气候变化的响应和恢复力

  

  • 收稿日期:2024-08-12 接受日期:2025-03-17 出版日期:2025-06-01 发布日期:2025-06-28

Regional growth response and resilience of Pinus tabuliformis to climate change in the north-south transition zone, central China

Kunyu Peng1, Jianfeng Peng2,3,*, Jinbao Li4, Jinkuan Li2, Yameng Liu2, Jiaxin Li2 and Xiaoxu Wei2   

  1. 1College of Geographical Sciences, Fujian Normal University, Fuzhou 350007, China
    2College of Geographical Sciences, Faculty of Geographical Science and Engineering, Henan University, Zhengzhou 450046, China
    3Key Laboratory of Earth System Observation and Simulation of Henan Province, Kaifeng 475004, China
    4Department of Geography, University of Hong Kong, Hong Kong SAR, China

    *Corresponding author. E-mail: jfpeng@vip.henu.edu.cn
  • Received:2024-08-12 Accepted:2025-03-17 Online:2025-06-01 Published:2025-06-28
  • Supported by:
    This research was funded by the National Natural Science Foundation of China (No. 42077417; 41671042).

摘要: 中国中部南北过渡带是气候和生态敏感地区,也是油松 (Pinus tabuliformis) 分布的南缘,但该区域油松对气候变化的响应仍缺乏系统研究。本研究基于伏牛山地区东西梯度上14个样点的树轮数据,构建了不同区域的树轮年表。分析发现,在区域尺度上,5月温度和降水是油松生长的主要限制因素,尤以东部的石人山–木札岭(YM)最为明显。整体而言,伏牛山南部温度和北部降水是树木生长的显著限制因子,但龙池墁(LCM)区域的树木更受南部温度限制,对北部降水的依赖性较弱。此外,5月温度的限制作用自东向西逐渐减弱,而5月降水的影响在东部石人山–木札岭(YM)和西部白云山-抱犊寨(BB)较高,中部龙池墁(LCM)相对较低,且北部降水对生长的促进作用强于南部。4至6月,自校准帕尔默干旱严重度指数(scPDSI)与树木生长呈显著正相关,其中5月的相关性最高。在时间尺度上,20世纪70至80年代油松呈加速生长趋势,而90年代后明显减缓,表明全球变暖背景下其生长状况出现退化,这一结果支持生态边际效应理论。然而,尽管油松生长整体呈下降趋势,在极端干旱事件后,其生长仍表现出较强的恢复力和韧性,并在3年内基本恢复至干扰前水平。这一现象与树木生长的长期下降趋势存在矛盾,亟需进一步研究以揭示其内在机制。

关键词: 南北过渡带, 树木年轮, 油松(Pinus tabuliformis), 气候响应, 生态恢复力, 伏牛山

Abstract: The north-south transitional zone in central China is a climatic and ecological sensitive area, and the southern margin of Pinus tabuliformis distribution, yet regional response to climate has not been investigated. Here, we developed different regional chronologies from 14 samplings along an east-west gradient in the Funiu Mountains. Correlation results indicated that regional tree growth was mainly limited by temperature and precipitation in May, especially for YM. Temperature in the south and precipitation in the north were significant limiting effects, except in LCM, where trees were more limited by temperature in the south than precipitation in the north. The limiting effect of temperature in May gradually weakened from east to west, while the effect of precipitation in May was higher in YM (east) and BB (west) than in LCM (middle), and the promoting effect of precipitation in the north was stronger than that in the south. The self-calibrating Palmer Drought Severity Index (scPDSI) had significant positive correlations with tree growth from April to June, with the highest correlation in May. Tree growth increased in the 1970s–80s and then decreased after the 1990s indicated that the growth had degraded under global warming. This result supports the ecological marginal effect theory of growth degeneration of P. tabuliformis in NSTZ under global warming. However, whole regional tree growth also showed stronger recovery and resilience under extreme drought, the resilience basically restored to the pre-disturbance level after three years, which is obviously contradictory with tree growth trend and needs to be further studied.

Key words: the north-south transitional zone, tree-rings, Pinus tabuliformis, climate response, resilience, Funiu Mountains