摘要
深入理解植被空间分布格局与环境变化及人类活动的关系,对区域生态保护与可持续发展具有重要意义.基于1980s和2020年的青藏高原植被分布数据,通过对7个景观指数和28个环境指标的冗余分析,在植被型组和植被型水平探讨植被分布格局与环境的关系.结果表明:最冷月最低气温是影响植被型组和植被型水平植被分布的主要影响指标;最暖月最高气温是1980s植被型组和植被型水平植被格局的次要影响指标,地面向下短波辐射是2020年植被型组和植被型水平植被格局的次要影响指标;2个时期植被型组和植被型的方差变异解释率≥1%,且P<0.05的影响指标均为气候因子.1980s-2020年间植被面积变化总体较小,部分植被类型的面积呈现减少趋势.由平均中心时空偏移分析模型分析结果可知植被整体偏移趋势波动小,植被型组中荒漠偏移趋势最大,向东南方向偏移464.56 km,植被型中温带矮半乔木荒漠的偏移趋势最大,向北偏移882.96 km.本研究表明青藏高原植被分布特征总体上变化较小,生态系统稳定,未来需关注中级和低级植被分类水平植被的变化.
Understanding the intricate relationships between the spatial distribution of vegetation,environmental changes,and human activities is crucial for regional ecological protection and sustainable development.This study explored the vegetation-environment interactions of the Qinghai-Xizang Plateau using vegetation data from the 1980s and 2020.A redundancy analysis using seven landscape metrics and 28 environmental indicators was performed at both the vegetation group and vegetation type levels.The results showed that the minimum temperature of the coldest month was the primary factor influencing vegetation distribution at both levels,while the maximum temperature of the warmest month was identified as a secondary factor influencing vegetation patterns.The variance was≥1%,and the influencing indicators with P<0.05 were climate factors.From the 1980s to 2020,there were relatively small changes in vegetation area,with some vegetation types showing a declining trend.The results from the mean center spatiotemporal shift analysis model indicated that the overall vegetation shift trend fluctuated slightly.Among the vegetation groups,the desert exhibited the largest shift,with a displacement of 464.56 km to the southeast.The temperate dwarf semi-arboreous desert exhibited the largest shift among vegetation types,with a displacement of 882.96 km to the north.Overall,there were minimal changes in the vegetation distribution characteristics of the Qinghai-Xizang Plateau,suggesting a stable ecosystem.Future studies should focus on changes in vegetation at intermediate and lower classification levels.
作者
陈巧娥
周继华
来利明
王贵豪
岳艳鹏
朱英洁
郑元润
CHEN Qiao’e;ZHOU Jihua;LAI Liming;WANG Guihao;YUE Yanpeng;ZHU Yingjie;ZHENG Yuanrun(China National Botanical Garden,West China Subalpine Botanical Garden,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《应用与环境生物学报》
北大核心
2025年第3期322-333,共12页
Chinese Journal of Applied and Environmental Biology
基金
第二次青藏高原综合科学考察研究项目(2019QZKT0608)资助。
关键词
植被
景观指数
环境指标
冗余分析
青藏高原
vegetation
landscape index
environmental indicator
redundancy analysis
Qinghai-Xizang Plateau
