摘要
以Google Earth Engine平台的MODIS-EVI数据为基础,运用像元二分模型和景观格局指数分析四川省2000—2020年植被覆盖度景观格局特征。结果表明:破碎度减小的是劣、高覆盖度,形状复杂化的是低、中覆盖度,最大斑块优势减弱的是中覆盖度,聚集性减弱的是劣、中覆盖度。在景观水平上,破碎度增大的在川西北和川南,形状复杂化的在成都平原、川西北和川南,最大斑块优势和连通性增强的在攀西,聚集性增强的在川东北和攀西,多样性和均匀性增强的在成都平原、川东北和川南。在类型水平上,破碎度增大和形状复杂化的是川西北的低、中覆盖度和川南的中、高覆盖度;最大斑块优势增强的是攀西的中覆盖度;聚集性增强的是川东北的劣、低、高覆盖度和攀西的劣、中、高覆盖度。
Based on the MODIS-EVI and the Google Earth Engine computing platform,the landscape pattern characteristics of fractional vegetation coverage was analyzed by the Dimidiate Pixel Model and the Landscape Pattern Index from 2000 to 2020 in Sichuan.The results indicated that the fragmentation of vegetation coverage was reduced by the poor and high vegetation coverage.The shape of vegetation coverage was more complicated by the low and medium vegetation coverage.The largest patch advantage of vegetation coverage was weakened by the medium vegetation coverage.The aggregation of vegetation coverage was weakened by the poor and medium vegetation coverage.At the landscape level,the fragmentation of vegetation coverage was increased in the Northwestern and the Southern.The shape of vegetation coverage was more complicated in the Chengdu Plain,the Northwestern and the Southern.The largest patch advantage and connectivity of vegetation coverage was increased in the Panxi.The aggregation of vegetation coverage was increased in the Northeastern and the Panxi.The diversity and uniformity of vegetation coverage was increased in the Chengdu Plain,the Northeastern and the Southern.At the type level,the fragmentation and the shape of vegetation coverage was increased by the low and medium vegetation coverage in the Northwestern and the medium and high vegetation coverage in the Southern.The largest patch advantage of vegetation coverage was increased by the medium vegetation coverage in the Panxi.The aggregation of vegetation coverage was increased by the poor,low and high vegetation coverage in the Northeastern and the poor,medium and high vegetation coverage in the Panxi.
作者
朱林富
ZHU Linfu(School of Tourism,Leshan Normal University,Leshan Sichuan 614000,China)
出处
《乐山师范学院学报》
2022年第4期45-51,83,共8页
Journal of Leshan Normal University
基金
四川旅游发展研究中心资助项目“基于MODIS数据的四川旅游区植被覆盖度空间格局特征分析”(LY20-29)
四川世界遗产普及基地资助项目“基于MODIS的世界遗产地植被覆盖变化对气候变化的响应”(YCKP1903)
乐山师范学院科研项目“基于MODIS数据的植被覆盖度时空变化监测”(XJR19006)。
关键词
MODIS
植被覆盖度
像元二分模型
景观格局指数
MODIS
Fractional Vegetation Coverage
Dimidiate Pixel Model
Landscape Pattern Index
