文献类型：期刊文献

中文题名：2000~2020年锡林郭勒草原植被覆盖时空动态变化及影响因素分析

英文题名：The Spatiotemporal Dynamics and Influencing Factors of Vegetation Cover in the Xilin Gol Grassland(2000-2020)

作者：孙斌[1,2] 王燕[3] 郭晔[4] 吴家敏[1,2,5] 李长龙[6] 黄海广[7]

第一作者：孙斌

机构：[1]中国林业科学研究院资源信息研究所,北京100091;[2]国家林业和草原局林业遥感与信息技术重点实验室,北京100091;[3]山东省国土空间数据和遥感技术研究院,山东济南250002;[4]国家林业和草原局发展研究中心,北京100714;[5]云南师范大学地理学部,云南昆明650050;[6]广州商学院,广东广州511363;[7]内蒙古自治区林业科学研究院,内蒙古呼和浩特010013

年份：2024

卷号：46

期号：11

起止页码：11-22

中文期刊名：中国草地学报

外文期刊名：Chinese Journal of Grassland

收录：CSTPCD;;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金项目(42271407);山西省科技创新人才团队专项资助(202204051001010)。

语种：中文

中文关键词：多角度像元二分模型;地理探测器;生态功能区;气候驱动;锡林郭勒盟

外文关键词：Multi-angle pixel binary model;Geographic detector;Ecological function area;Climate driven;Xilin Gol

分类号：S812

摘要：锡林郭勒盟生态地位十分重要,因此定量分析其植被覆盖度时空分布变化特征及驱动因素具有重要意义。本研究首先针对草原植被结构特征,基于优化的多角度像元二分模型构建了锡林郭勒草原2000~2020年植被覆盖度数据集,然后分析了覆盖度的时空变化特征,最后利用地理探测器研究了植被覆盖度变化的影响因素。结果表明:(1)2000~2020年锡林郭勒草原植被覆盖度呈“东高西低”的分布格局,不同生态功能区覆盖度差异较大,覆盖度主要集中在0.2~0.6;不同生态亚区植被覆盖度变化趋势基本一致,呈现波动增长趋势。(2)锡林郭勒草原不同生态功能区植被覆盖度变化差异明显,整体呈上升趋势,显著上升区为11.99%,主要分布在大兴安岭南部落森林草原生态亚区南部,锡林郭勒典型草原生态亚区北部和西部,阴山山地落叶灌丛-草原生态亚区的东部和内蒙古高原荒漠草原生态亚区中部和东南部;14.21%的像元覆盖度显著下降,集中分布在大兴安岭南部落森林草原生态亚区北部、锡林郭勒典型草原生态亚区中部条带状区域和南部以及坝上高原草原与农业生态亚区,需要重点关注。(3)湿润程度是锡林郭勒草原植被覆盖度变化的主要驱动因素,降水的影响力次之,两者与覆盖度均为正相关关系,且湿润指数对中等覆盖度区域影响力较大;气温对覆盖度的驱动力最小,两者为负相关关系。该研究期望为锡林郭勒草原生态保护与合理利用提供科学支撑。
The Xilingol League holds significant ecological importance.Quantitatively analyzing the spatiotemporal distribution and driving factors of vegetation coverage in the Xilingol grassland is therefore essential.This study constructed a vegetation cover dataset for the Xilin Gol grassland from 2000 to 2020 using an optimized multi-angle pixel binary model.We then analyzed the spatiotemporal characteristics of vegetation cover changes with the Sen+Mann-Kendall method and identified influencing factors using the geographic detector.The results showed as follows:(1)From 2000 to 2020,the vegetation cover in Xilin Gol grassland exhibited an“east-high,west-low”distribution pattern,with coverage values largely ranging between 0.2 and 0.6 and considerable variation across ecological function zones.(2)Distinct differences in vegetation coverage were observed across ecological function zones,with an overall upward trend.Areas showing significantly increased coverage(11.99%)were primarily located in the southern part of the forest-steppe ecological subregion of the Daxing'an Mountains,the northern and western parts of the Xilin Gol typical grassland subregion,the eastern part of the Yinshan deciduous shrub-grassland subregion,and the central and southeastern parts of the Inner Mongolia Plateau desert steppe subregion.In addition,14.21%of the area showed decreased vegetation coverage,mainly in the northern part of the Daxing'an forest-steppe subregion,the central and southern regions of the Xilin Gol typical grassland subregion,and the grassland and agro-ecological subregion of the Bashang Plateau,which warrants attention.(3)Humid-ity was the primary driver of vegetation cover change,followed closely by precipitation,both of which were positively correlated with vegetation coverage.The moisture index(MI)had a stranger effect on areas with moderate vegetation coverage,with air temperature exerted the least influence and was negatively corre-lated with coverage.This study provides scientific support for the ecological protection and sustainable management of the Xilin Gol grassland.