生态学报2024，Vol.44Issue(5)：2043-2056,14.DOI:10.20103/j.stxb.202305060947
气候因子和人类活动对松辽流域植被叶面积指数动态的影响
Influences of climate factors and human activities on vegetation leaf area index dynamics in the Songliao River Basin
摘要
Abstract
Understanding the impact of climate change and human activities on vegetation is of great significance to the sustainable development of terrestrial ecosystems.Based on monthly MODIS leaf area index and meteorological data,the trend and partial correlation analysis,time-lag and cumulative effects analysis,and the improved residual analysis were used to evaluate the LAI dynamics of vegetation in the growing season of Songliao River Basin from 2001 to 2021,explore the impact of climate and human drivers on vegetation under the premise of taking time-lag and cumulative effects into account.The results showed that:(1)the overall distribution pattern of LAI in Songliao River Basin was low in plain and high in mountain area.In the past 21 years,the vegetation LAI showed an upward trend in fluctuations,and the future vegetation change trend will be mainly continuous improvement,but there is still a risk of degradation in the grasslands of western Inner Mongolia and some areas of Daxing'an Mountains and Xiaoxing'an Mountains.(2)Vegetation LAI was positively correlated with precipitation,and vegetation growth was more sensitive to precipitation than air temperature.The time effects of the LAI change varied with climate factors,land cover types and vegetation zoning.The main time effects of LAI on air temperature were 2 month lag and 0-1 month accumulation,while for precipitation,there was no significant lag and 1 month accumulation.(3)The combined effects of climate change and human activities were the main reasons that affected the dynamics of vegetation LAI in Songliao River Basin,and their contributions to vegetation change accounted for 41.7%and 58.3%,respectively.When considering time-lag and cumulative effects at the same time,the explanation degree of climate factor to vegetation growth was improved.关键词
气候因子/松辽流域/时滞累积效应/人类活动/残差分析Key words
climate factors/Songliao River Basin/time-lag and cumulative effects/human activities/residuals analysis引用本文复制引用
马云飞,何全军,张月维,石艳军,李建平,袁福香..气候因子和人类活动对松辽流域植被叶面积指数动态的影响[J].生态学报,2024,44(5):2043-2056,14.基金项目
吉林省科技发展项目(20210203152SF) （20210203152SF）
中国气象局创新发展专项(CXFZ2021J076) （CXFZ2021J076）
