JIA Longyuab,GUAN Zengyanab,CHANG Ruiying,et al.Response of Radical Growth of Rhododendron faberi subsp. Prattii to Climate Change above Treeline in the Gongga Mountain, China[J].Mountain Research,2021,(5):646-657.[doi:10.16089/j.cnki.1008-2786.000627)]





Response of Radical Growth of Rhododendron faberi subsp. Prattii to Climate Change above Treeline in the Gongga Mountain, China
贾龙玉1a 1b管增艳1a 1b常瑞英2石松林1a 1b*彭培好1a 1b
1.成都理工大学 a.旅游与城乡规划学院; b.生态资源与景观研究所,成都 610059; 2.中国科学院、水利部成都山地灾害与环境研究所,成都 610041
JIA Longyu1a1b GUAN Zengyan1a1b CHANG Ruiying2 SHI Songlin1a1b* PENG Peihao1a1b
1. a. College of Tourism and Urban-Rural Planning; b. Ecological Resources and Landscape Architecture Institute, Chengdu University of Technology, Chengdu 610059, China; 2. Institute of Mountain hazards and Environment, Chinese Academy of Sciences, Chengdu 610041,China
气候变化 径向生长 大叶金顶杜鹃 树轮生态学 贡嘎山
气候变暖深刻影响着高山树线上方的灌木生长,然而目前其对气候变化的响应特征仍不清楚。本文以贡嘎山树线上方的大叶金顶杜鹃(Rhododendron faberi subsp. Prattii)为研究对象,分别采用负指数函数法(CD)、断面积增量(BAI)以及区域曲线标准法(RCS)去除生长趋势,建立标准化年表,分析大叶金顶杜鹃生长特征,并用相关分析、偏相关分析和滑动相关分析来探讨大叶金顶杜鹃径向生长与气候因子的关系。结果如下:(1)Mann-Kendall趋势检验结果表明1980—2018年断面积增量BAI增加趋势最为显著;(2)相关分析结果表明BAI与前一年7月最高温度、前一年9月平均温度、当年7月和9月最高温度以及平均温度呈现显著正相关关系,与前一年以及当年6月、7月、9月相对湿度呈现显著负相关关系; 在季节尺度上,BAI与前一年7—11月平均温度、当年7—9月平均温度和当年4—9月最高温度呈现显著正相关,与前一年7—9月以及当年2—9月平均相对湿度显著负相关;(3)响应函数和偏相关分析分析结果表明当年7月最高温度是影响杜鹃灌木径向生长的关键生态因子;(4)滑动相关分析揭示了在全球变暖背景下,分布在贡嘎山树线上方的大叶金顶杜鹃的径向生长将会增加。本研究结果有助于更加全面地理解与预测气候变化对树线上方灌木生长的影响。


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收稿日期(Received date):2021-02-05; 改回日期(Accepted date): 2021-09-03
基金项目(Foundation item):国家重点研发计划项目(2016YFC0502105)。[National Key R&D Program of China(2016YFC0502105)]
作者简介(Biography):贾龙玉(1996-),男,四川巴中人,硕士研究生,主要研究方向:全球变化。[JIA Longyu(1996-),male,born in Bazhong, Sichuan province, M.Sc. candidate, research on global change] E-mail:jialongyu@stu.cdut.edu.cn
*通讯作者(Corresponding author):石松林(1986-),男,四川巴中人,博士,讲师,主要研究方向:全球变化。[SHI Songlin(1986-), male, born in Bazhong, Sichuan province,Ph.D., lecturer, research on global change] E-mail:shisonglin17@cdut.edu.cn
更新日期/Last Update: 2021-09-30