生态科学2025，Vol.44Issue(3)：19-29,11.DOI:10.14108/j.cnki.1008-8873.2025.03.003
四川凉山彝族山区土地利用景观格局的地形梯度效应分析
Topographic gradient effect of land use cover and landscape patterns in Liangshan Yi ethnic mountains,Sichuan province
摘要
Abstract
Clarifying the topographic gradient effect on land use cover in mountainous areas is essential to its spatial pattern optimization.In this study,the topographic gradient effect on land use cover is explored using elevation,slope,topographic index,spatial distribution index,and landscape pattern index in the Liangshan Yi ethnic mountainous as a case study.The results show that:(1)Forest land and grassland are the two main land use cover types,accounting for 79.40%of the total area,followed by cropland,accounting for 19.74%.Dry land is the primary type of cropland with a scattered distribution.The proportion of construction land,water area,and unused land are small.(2)The distribution of land use cover has a noticeable topographic gradient effect.Forest land and grassland are less influenced by elevation,while construction land,water area,and paddy field are more affected.(3)The distribution index of the forest land,grassland,and unused land increases with the rise in topographic gradient,with their distribution dominance becoming increasingly prominent.In contrast,the distribution index of construction land,water area,paddy land,and dry land decreases sharply.(4)The distribution of the Shannon diversity index(SHDI),contagion(CONTAG),and landscape shape index(LSI)demonstrates a pattern of initially increasing and then decreasing with higher topographic gradients.In contrast,the patch density(PD),aggregation index(AI)and separation index(SPLIT)show fluctuating trends.Based on these findings,the study recommends the continuous promotion of poverty alleviation relocation programs and cropland remediation.关键词
土地利用/地形因子/地形梯度效应/景观格局/凉山彝族山区Key words
land use cover/topographic factor/topographic gradient effect/landscape pattern/Liangshan Yi ethnic mountains分类
建筑与水利引用本文复制引用
陈阳,舒波,张睿智..四川凉山彝族山区土地利用景观格局的地形梯度效应分析[J].生态科学,2025,44(3):19-29,11.基金项目
国家自然科学基金青年项目(52308081) （52308081）
四川省教育厅人文社会科学重点研究基地:地方文化资源保护与开发研究中心一般项目(DFWH2023-020) （DFWH2023-020）
