基于高分数据的广西廉州湾鱼藤对红树林退化的影响研究  

Effects of Deris trfoliata on mangrove degradation in the Lianzhou Bay of Guangxi based on China’s high-resolution remote sensing data

作　　者：吕涛 钟仕全 蒋卫国 凌子燕 初爱萍 Lyu Tao;Zhong Shiquan;Jiang Weiguo;Ling Ziyan;Chu Aiping(Key Laboratory of Environment Change and Resources Use in Beibu Gulf,Ministry of Education,School of Geography and Planning,Nanning Normal University,Nanning 530001,Guangxi,P.R.China;Faculty of Geographical Science,Beijing Normal University,Beijing 100875,P.R.China;School of Information and Control Engineering,Qingdao University of Technology,Qingdao 266520,Shandong,P.R.China)

机构地区：[1]南宁师范大学地理科学与规划学院,北部湾环境演变与资源利用教育部重点实验室,广西南宁530001 [2]北京师范大学地理科学学部,北京100875 [3]青岛理工大学信息与控制工程学院,山东青岛266520

出　　处：《湿地科学》2025年第1期11-21,共11页Wetland Science

基　　金：NSFC-广西联合基金重点支持项目(U21A2022)资助。

摘　　要：近年来,鱼藤在红树林中快速扩散,对红树林生态系统造成严重威胁。本研究基于2013—2022年的逐年国产高分遥感数据,选取广西廉州湾地区南流江入海口的典型鱼藤(Derris trifoliata)扩散区,分析鱼藤在秋茄(Kandelia obovala)和桐花树(Aegiceras corniculatum)红树林中的扩散规律,探究鱼藤对红树林退化的影响。结果表明,2013—2022年廉州湾地区鱼藤面积累计增长92.5 hm^(2),年增长率达13.8%;鱼藤呈点状在红树林中爆发,以同心圆向外扩散,并逐渐连成片,其对红树林斑块的负面影响不断增加,鱼藤影响轻微型、鱼藤影响中度型、鱼藤影响重度型3处典型红树林区鱼藤扩散面积占比分别为40.5%、90.0%和89.3%,红树林退化面积占比分别为12.9%、43.3%和59.5%;红树林从被鱼藤攀附到彻底退化死亡,历时约4~6 a。研究结果可为红树林保护和鱼藤治理提供科学依据。Derris trifoliata,a native liana,commonly associated with mangrove ecosystems,predominantly grows in coastal mudflat shrubs.However,its rapid spread in mangrove ecosystems in recent years has posed a significant ecological threat.This research seeks to investigate the spread patterns of D.trfoliata within mangrove ecosystems and the mechanisms underlying its contribution to mangrove degradation,using Chian’s high-resolution remote sensing data collected between 2013 and 2022.The dataset comprised imagery from GF-1(2 m resolution),GF-2(1 m resolution),GF-6(2 m resolution),and ZY-3(2 m resolution)satellites,focusing on a representative zone of D.trfoliata expansion at the Nanliu River Coastal estuary in Lianzhou Bay,Guangxi Province.The spatial distribution of mangrove wetlands and D.trfoliata was identified through visual interpretation,while trend analysis was employed to assess changes in vegetation NDVI.NDVI analysis was performed to evaluate the effects of D.trfoliata on mangrove degradation.By 2022,D.trfoliata coverage in the mangrove wetlands of Lianzhou Bay reached 134.4 hm^(2),reflecting a cumulative increase of 92.5 hm^(2)since 2013,at an average annual growth rate of 13.8%.Based on D.trfoliata coverage and the degree of mangrove degradation,three representative expansion areas were classified into slight,moderate,and severe impact zones.D.trfoliata spread ratios were 40.5%,90.0%,and 89.3%,with corresponding mangrove degradation rates of 12.9%,43.3%,and 59.5%,respectively.The spread of D.trfoliata primarily follows two patterns:(1)from absence to presence,where D.trfoliata initially appears in spot-like distributions and gradually expands concentrically into mangroves,and(2)from localized patches to widespread coverage,characterized by the coalescence of adjacent D.trfoliata patches and their continuous outward expansion along the boundary.NDVI analysis indicated that NDVI values initially rose before declining during the mangrove degradation process,which spanned approximately 4 to 6 years from the ons

关 键 词：红树林退化 鱼藤 高分数据 秋茄 桐花树 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]