生态学报2025，Vol.45Issue(9)：4356-4367,12.DOI:10.20103/j.stxb.202409122203
四川湿地生态系统外来入侵植物现状及空间分布
Status and spatial distribution of alien invasive plants in Sichuan wetland ecosystems,China
摘要
Abstract
Biodiversity is increasingly threatened by localized extinctions under the impacts of global climate change,and alien species may exacerbate these impacts and lead to the decline of native species communities.Invasive alien plants pose a greater threat to the biodiversity and ecosystem stability of wetland ecosystems in Sichuan,but little is known about their background conditions.In order to comprehensively grasp the current status and spatial distribution of alien invasive plants in wetland ecosystems in Sichuan Province,ArcGIS kernel density and standard deviation ellipse analysis tools were used to explore the spatial distribution pattern of alien invasive plants in wetland ecosystems based on the data of 36,724 sampling lines,84,304 sampling plots and 83,931 sampling squares in the province.The results showed that a total of 24,106 distribution points of invasive alien plants were recorded in Sichuan wetland ecosystems,belonging to 29 families,68 genera and 102 species,and dominated by Compositae(32 species),Amaranthaceae(11 species)and Gramineae(8 species).In terms of origin analysis,the Americas had the most sources with 74 species(72.55％).In terms of hazard class,there are 73(71.57％)invasive species between class 1 and class 3,of which 60(82.19％)are of American origin.In terms of spatial distribution pattern,alien invasive plants appeared in wetland ecosystems in all surveyed sub-areas,but their obvious preference was for the Basin Plain/Hill Zone,the Southern Marginal Zone of the Basin Periphery,and the Southwest Sichuan Mountains,accounting for 88.56％ of the total.From the point of view of altitude distribution,wetland invasive alien plants were mainly concentrated in the altitude below 3,000m,and the frequency of invasive alien plants in the wetland was highest in the altitude section of 300-500m.Studies have shown that Sichuan wetland ecosystems have a high number of alien invasive plant species and a clear trend of proliferation.Differences in the number of invasive alien plant species in wetlands may be related to the distribution of water resources,elevation,level of economic development,and the size of the surrounding population.Higher elevations and less anthropogenic activity inhibit the invasion of wetland alien plants,while warmer and more isothermal climatic conditions in the native range exacerbate the invasion of wetland alien plants.The results of the study will provide a theoretical and data basis for the risk assessment of Sichuan wetland ecosystems and for future daily monitoring,manual intervention and prevention and control deployment.关键词
外来入侵植物/湿地生态系统/空间分布分析/核密度估计/生态风险评估Key words
invasive alien plants/wetland ecosystems/spatial distribution analysis/kernel density estimation/ecological risk assessment引用本文复制引用
王鑫,赵昕,黄琴,蒋小林,隆世良,潘红丽..四川湿地生态系统外来入侵植物现状及空间分布[J].生态学报,2025,45(9):4356-4367,12.基金项目
2022中央财政林业改革发展资金项目(CZLG5102022001) （CZLG5102022001）
