中国草地学报2025，Vol.47Issue(9)：69-81,13.DOI:10.16742/j.zgcdxb.20250009
洞庭湖收割活动对2015-2023年南荻群落景观格局的影响
Harvesting Effects on the Landscape Patterns of Miscanthus lutarioriparius Communities in Dongting Lake(2015-2023)
摘要
Abstract
This study investigated the spatiotemporal dynamics of harvesting activities in Dongting Lake(South China)and their effects on Miscanthus lutarioriparius using multi-source satellite remote sens-ing data from 2015 to 2023.An object-oriented classification approach was applied to extract spatial distri-bution patterns based on vegetation spectral characteristics.Harvesting area(hectares)and landscape met-rics were quantified through spatial and landscape pattern analyses in ArcGIS 10.7 and Fragstats 4.2.The results showed that the harvested area and harvest rate of Miscanthus lutarioriparius peaked in 2015(57686.06 hm2;55.69%)and declined to their lowest levels in 2019(3743.21 hm2;4.59%).Following policy adjustments after 2018,harvesting intensity decreased,with spatial shifts toward the southern and eastern Lake regions,reflecting a northeastward migration trend.While early harvesting exhibited no pref-erence for patch size,later mechanization promoted harvesting in large,contiguous Miscanthus lutariori-parius,reducing costs and improving efficiency.Correlation analyses indicate that harvesting maintained community aggregation and total area but altered shape complexity and spatial cohesion.These findings suggest that strategic planning of harvesting activities is essential to stabilize Miscanthus lutarioriparius populations,prevent further decline,and support wetland ecosystem.Expanding harvesting ranges may provide a pathway to achieving ecological and economic synergy for this species.关键词
洞庭湖湿地/南荻群落/收割活动/景观格局Key words
Dongting Lake wetland/Miscanthus lutarioriparius community/Harvesting activities/Landscape pattern分类
农业科技引用本文复制引用
朱鹏,余子璇,胡文,钱宏革,易自力,杨塞..洞庭湖收割活动对2015-2023年南荻群落景观格局的影响[J].中国草地学报,2025,47(9):69-81,13.基金项目
湖南省研究生科研创新项目(CX20220682) （CX20220682）
湖南省创新型省份建设专项(2021NK1050) （2021NK1050）
