2000—2020年寒旱地区植被覆盖变化及影响因素分析——以阿勒泰地区为例  

Analyzing vegetation cover changes and influencing factors in cold and arid regions from 2000 to 2020:A case study of the Altay area

作　　者：岳胜如 胡雪菲[1] 孟福军[1] YUE Shengru;HU Xuefei;MENG Fujun(College of Water Resources and Architecture Engineering,Tarim University,Alar,Xinjiang 843300)

机构地区：[1]塔里木大学水利与建筑工程学院,新疆阿拉尔843300

出　　处：《塔里木大学学报》2023年第3期102-112,共11页Journal of Tarim University

基　　金：塔里木大学校长基金青年项目“基于3S技术的沙雅县土壤水盐时空变化监测”(TDZKQN201816);塔里木大学校长基金青年项目“基于BDS视觉导航的农机多智体协同作业的自主相对导航算法研究”(TDZKQN201821)。

摘　　要：植被覆盖度(FVC)是监测陆地生态系统的关键变量,气候变化和人类活动是陆地生态系统演变的重要因素。本研究通过分析阿勒泰地区FVC时空变化特征,探究FVC对气候变化和人类活动的响应机制,为该地区制定有效的生态保护及可持续发展措施提供科学依据。利用MODIS NDVI(2000—2020年)数据集,结合气候因子和社会经济指标数据,基于最大值合成、斜率分析、相关性分析及因子分析等方法,探究FVC变化及其对气候和人为因素的响应机制。结果表明,2020年阿勒泰地区FVC在空间上呈北高南低特征,平均FVC为0.338;2000—2020年间阿勒泰地区FVC呈波动上升趋势,FVC平均增速为1.55×10^(-3)a,研究区FVC减小和显著减少、基本不变、增加和显著增加区域分别占研究区总面积的0.94%、88.03%和11.03%,研究区2000—2020年间气候变化趋势不显著;不同县域的FVC变化对人类活动、气候因子的响应规律和强度不同。综上所述,气候因子和人类活动是影响和解释植被变化的重要因素,基于不同区域背景,气候因子和社会经济对植被覆盖影响的空间异质性很强。研究结果为干旱、半干旱的寒旱地区生态系统保护和管理提供参考数据。Forest vegetation coverage(FVC)is a key variable for monitoring terrestrial ecosystems,with climate change and human activities posing as crucial factors influencing the evolution of these ecosystems.This study aims to analyze the temporal and spatial variations of FVC in Altay region and investigate how FVC responses to climate change and human activities.This insights gathered will provide scientific basis for implementing effective ecological conservation and sustainable development strategies in this area.The methodology involves employing MODIS NDVI dataset(2000 to 2020),combined with climate factors and socio-economic index data.This study discusses the relationship between FVC changes and climatic and human factors through maximum synthesis,slope analysis,correlation analysis and factor analysis.The results showed that the FVC was higher in the northern region of Altay and lower in the southern region in 2020,with an average FVC of 0.338;from 2000 to 2020,FVC in Altay showed an upward trend with an average growth rate of 1.55×10^(-3) a.The FVC in the study area decreased(or significantly decreased),remained relatively stable,and increased(or significantly increased),accounting for 0.94%,88.03%and 11.03%of the total area,respectively.The climate change trend from 2000 to 2020 within the study area is not significant.The response patterns and intensity of FVC changes to human activities and climate factors varied among different counties.The findings confirm that climate factors and human activities are important influencers and descriptors of vegetation change.Given different regional backgrounds,the spatial heterogeneity of the impacts of climatic factors and social-economic conditions on vegetation cover is substantial.These findings can provide reference data for the protection and management of ecosystems in arid and semi-arid areas.

关 键 词：植被覆盖度 气候变化 响应规律和强度 空间异质性 

分 类 号：X87[环境科学与工程—环境工程]