[1]史丰鸣a,杨 睿a,石松林a,等.川西南高山松径向生长对气候响应的时空分异特征[J].山地学报,2023,(4):478-492.[doi:10.16089/j.cnki.1008-2786.000764 ]
　SHI Fengminga,YANG Ruia,SHI Songlina,et al.Spatio-Temporal Variability of Radial Growth of Pinus densata in Responses to Climate Change in Southwestern Sichuan, China[J].Mountain Research,2023,(4):478-492.[doi:10.16089/j.cnki.1008-2786.000764 ]
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川西南高山松径向生长对气候响应的时空分异特征
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2023年第4期
页码:
478-492
栏目:
山地环境
出版日期:
2023-07-20

文章信息/Info

Title:
Spatio-Temporal Variability of Radial Growth of Pinus densata in Responses to Climate Change in Southwestern Sichuan, China
文章编号:
1008-2786-(2023)4-478-15
作者:
史丰鸣a; 杨 睿a; 石松林a; b*; 金亚宁a; 管增艳a
(成都理工大学a. 旅游与城乡规划学院; b.四川省社会科学重点研究基地(扩展)国家公园研究中心,成都 610059)
Author(s):
SHI Fengminga; YANG Ruia; SHI Songlina; b*; JIN Yaninga; GUAN Zengyana
(a. College of Tourism and Urban-Rural Planning; b.Research Center of National Park, Sichuan Key Research Base for Social Sciences, Chengdu University of Technology, Chengdu 610059, China)
关键词:
径向生长;  树木年轮;  气候变化;  高山松;  四川木里县
Keywords:
radial growth;  tree ring;  climate change;  Pinus densata;  Muli county; Sichuan
分类号:
K903
DOI:
10.16089/j.cnki.1008-2786.000764
文献标志码:
A
摘要:
气候变化从不同时空尺度上影响中国川西南山地亚高山森林生长。高山松( Pinus densata )作为高山地区的特有树种,是川西南山地亚高山针叶林的主要优势种或建群种。然而,目前有关高山松径向生长对气候变化响应的时空分异的研究仍有限,不利于全面了解川西南地区森林对气候变化的响应关系。为了探究不同生境下高山松生长对气候因子响应的特点及差异,本文以四川省木里县3个不同地点(鸭咀自然保护区、博窝乡坑古村、关机村)高山松为研究对象,采用树木年轮学方法,构建高山松树木年轮宽度指数标准年表和胸高断面积增量序列,运用相关分析和滑动相关分析方法研究不同地点高山松径向生长与各气候因子之间的关系。结果表明:(1)不同区域高山松径向生长对气候变化的响应方式不一致; 鸭咀自然保护区高山松径向生长主要受温度和生长季相对湿度限制,博窝乡关机村的高山松径向生长主要受7—8月的平均最低温度制约,而博窝乡坑古村的高山松径向生长主要受5—6月平均温度和相对湿度的影响。(2)不同区域高山松径向生长对气候响应的时间稳定性存在差异; 鸭咀自然保护区高山松生长与温度正相关关系逐渐增加,关机村高山松径向生长与温度的负相关关系和干旱指数的正相关关系不断加强,而坑古村的高山松径向生长对温度响应的敏感性呈下降趋势。(3)1990年升温突变后,生长季温度升高对高山松径向生长影响具有明显的区域差异,促进鸭咀保护区树木生长,抑制关机村树木生长,而坑古村树木生长受温度影响较弱。未来气候变暖背景下,干旱生境下高山松生长更容易受到气候变暖的影响而导致生长衰退,湿润环境下高山松会表现出生长加速,从而潜在改变区域森林动态。本研究可为未来气候变化背景下高山松生长动态预测及区域森林的适应性管理提供科学依据。
Abstract:
The growth of subalpine coniferous forests in mountainous areas of southwestern Sichuan of China is subject to global climate change on different spatial and temporal scales. As an endemic tree species in the alpine region, Pinus densata is a dominant or edificator of subalpine coniferous forests in the mountains of southwestern Sichuan. Unfortunately, there was a lack of in-depth knowledge of spatiotemporal differentiation of radial growth of Pinus densata in response to climate change,which is not conducive to a comprehensive understanding of the response mechanism of subalpine forests to climate change in southwestern Sichuan. In this study, it aimed alpine pines at three distinct habitat sites in Mulicounty, Sichuan province to explore the responses of tree radial growths of Pinusdensata to climatic factors. Three habitats for case study were selected separately at Yazui Nature Reserve, Kenggu village and Guanji village in Bowo Township, where it went through gradual changes from humid to relatively arid. Tree-ring width, tree-ring width index, and basal area increment of Pinusdensata were measured and calculated in terms of dendroecology method. Correlation and moving correlation analysis were used to study the relationship between climatic factors and radial growth of Pinusdensata at different locations. It had following findings.(1)The radial growth of Pinus densata in response to climate changes exhibited remarkable differentiation at distinct habitat sites. At the Yazui Natural Reserve, the radial growth of Pinus densata was significantly related to the temperature and relative humidity of the previous and current growing season. At the Guanji site, tree growth was primarily limited by average minimum temperature from July to August. At the Kenggu site, the radial growth of Pinus densata was predominantly constrained by the average temperature and relative humidity between May and June of the current year.(2)Temporal stability of the relationship between radial growth of Pinus densata and climatic factors varied among different study sites. The positive correlation between the radial growth of Pinus densata and temperature showed an increasing trend at the Yazui Natural Reserve. At the Guanji site, the correlation between radial growth and temperature was negative, whereas the correlation with the Palmer Drought Severity Index became positive. In contrast, the sensitivity of the radial growth in response to temperature decreased at the Kenggu site.(3)With sharp rise in temperature since 1990, there were intensive variations in the effects of increasing temperature in growing season on radial growth of Pinus densata at different study sites. Temperature rise promoted the growth of trees at the Yazui Natural Reserve, but inhibited them at the Guanji site; however, the growth of Pinus densata at the Kenggu site was narrowly influenced by temperature rise. The radial growth of Pinus densata in arid habitat was possible to decline affected by climate warming and Pinus densata in humid environment will exhibit accelerated growth, which would potentially change the forest dynamics under climate change.This study provides a scientific basis for the prediction of the growth dynamics of Pinus densata and the adaptive management of regional forests under the background of future climate change.

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备注/Memo

备注/Memo:
收稿日期(Received date): 2022-12- 07; 改回日期(Accepted date):2023- 08-17
基金项目(Foundation item): 第二次青藏高原综合科学考察研究(2019QZKK0402)。[Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0402)]
作者简介(Biography): 史丰鸣(1999-),男,河南漯河人,硕士研究生,主要研究方向:全球变化。[SHI Fengming(1999- ), male, born in Luohe, Henan province, M.Sc. candidate, research on global change]E-mail: shifengming@stu.cdut.edu.cn
*通讯作者(Corresponding author): 石松林(1986-),男,博士,副教授,主要研究方向:全球变化。[SHI Songlin(1986-), male,Ph.D., associate professor,research on global change]E-mail: shisonglin17@ cdut.edu.cn
更新日期/Last Update: 2023-07-30