自然资源遥感2025，Vol.37Issue(2)：246-255,10.DOI:10.6046/zrzyyg.2023325
20世纪80年代以来盐城滨海湿地互花米草扩张时空轨迹及对景观格局的影响
Spatiotemporal trajectory of Spartina alterniflora expansion and its impact on landscape patterns in the Yancheng coastal wetland since the 1980s
摘要
Abstract
This study investigated the core area of the Jiangsu Yancheng Wetland National Reserve of Rare Birds based on 12 remote sensing images from 1983 to 2021 as data sources.Specifically,this study explored the spatiotemporal trajectory of Spartina alterniflora expansion and its impact on landscape patterns by combining landscape ecology methods with geographical information system(GIS)technology.The results show that from 1983 to 2021,Spartina alterniflora expanded significantly,leading to a 12.365 fold area increase.It experienced initial expansion,accelerated growth,and stagnation stages,which would be succeeded by the control and elimination stage.Its distribution area manifested a significant linear relationship with time.Its spatiotemporal trajectory was characterized by the migration of the western,eastern,and central clusters.In 1983,1988,1992,and 1997,the western clusters migrated primarily toward the southeast.In 2000,2002,2006,and 2009,the eastern clusters migrated principally toward the northeast.Both the western and eastern clusters showed a seaward trend.In 2011,2014,2017,and 2021,the central clusters displayed a significant landward trend despite disorderly migration.Spartina alterniflora expansion resulted in a cumulative contribution rate of 43.352％ to regional landscape structure changes.Its contribution was consistent with its expansion stages,showing a low-high-low pattern.The area of Spartina alterniflora was significantly correlated with the regional landscape pattern index.The landscape pattern of Spartina alterniflora was significantly correlated with the regional landscape pattern,with significant correlations between type-scale indices,including largest patch index(LPI),total edge(TE),edge density(ED),and fractal dimension index of area-weighted mean(FRAC_AM),and the regional landscape pattern index at the significance level of 0.01.However,the area of Spartina alterniflora was significantly negatively correlated with habitat quality.Overall,the results of this study suggest that the expansion of Spartina alterniflora profoundly affects landscape patterns and functions,warranting control according to local conditions.关键词
互花米草/时空轨迹/景观格局/景观变化贡献率/盐城滨海湿地Key words
Spartina alterniflora/spatiotemporal trajectory/landscape pattern/rate of contribution to landscape change/Yancheng coastal wetland分类
信息技术与安全科学引用本文复制引用
徐雅,张华兵..20世纪80年代以来盐城滨海湿地互花米草扩张时空轨迹及对景观格局的影响[J].自然资源遥感,2025,37(2):246-255,10.基金项目
国家自然科学基金项目"人工围堰和互花米草扩张下海滨湿地景观生境质量演变机制研究"(编号:41771199)、江苏省高校哲学社会科学研究项目"苏北农业农村现代化发展现状、障碍识别及实现路径研究"(编号:2021SJA1892)和盐城市基础研究计划项目"基于生态网络的盐城滨海湿地生态安全格局构建"(编号:YCBK202233)共同资助. （编号:41771199）
