摘要
【目的】为准确掌握衡阳市外来入侵物种的现状,有针对性的开展防治提供依据。【方法】通过对衡阳市下辖的12个县(市)区开展踏查和标准地调查,分析外来入侵物种的组成、原产地、地理分布及物种密度,依据对当地生态环境及经济的影响划分入侵等级。【结果】通过实地调查,共发现外来入侵植物70种,隶属于29科,动物2种,隶属于2科,以菊科(Asteraceae)种数最多,占总种数的25.71%。从地区分布来看,石鼓区物种数达42种,物种密度为0.3750种/km2,均为最高。依据危害程度将外来入侵物种划分为5个入侵等级,其中1级入侵类13种,2级入侵类19种,3级入侵类18种,4级入侵类17种,5级入侵类3种;动物2种都为1级入侵类。【结论】衡阳市目前外来入侵植物70种,占湖南省已知入侵种的52.2%,分布总体呈现北多南少的趋势,危害严重的1级、2级入侵类占总数的45.71%。
【Objective】In order to accurately grasp the current situation of alien invasive species in Hengyang City and provide basis for targeted prevention and control.【Method】The composition,origin,geographical distribution and species density of alien invasive species were analyzed through the field in⁃vestigation and standard plot investigation in 12 counties(cities)under the jurisdiction of Hengyang City,and the invasion grade was divided according to the impact on local ecological environment and economy.【Result】through field investigation,70 species of alien invasive plants were found,belonging to 29 fami⁃lies,2 species of animals,belonging to 2 families,and Asteraceae was the most,accounting for 25.71%of the total species.From the regional distribution,the number of species in shigu District is 42,and the spe⁃cies density is 0.3750 species/km2,which is the highest.According to the degree of damage,alien inva⁃sive species are divided into five invasion levels,including 13 species of grade 1 invasive species,19 spe⁃cies of grade 2 invasive species,18 species of grade 3 invasive species,17 species of grade 4 invasive spe⁃cies,and 3 species of grade 5 invasive species;two species of animals are all grade 1 invasive species.【Conclusion】There are 70 species of invasive plants in Hengyang City,accounting for 52.2%of the known invasive species in Hunan Province,and the distribution of invasive plants in Hengyang City is more in the north and less in the south,among which there were 45.71%of the total number of serious class 1 and class 2 invasive species.
作者
刘伟才
刘俊
付美云
赵富群
李凌
LIU Weicai;LIU Jun;FU Meiyun;ZHAO Fuqun;LI Ling(Department of Ecological Livable,Hunan Polytechnic of Environment and Biology,Hengyang 421005,China;Department of Landscape College,Hunan Polytechnic of Environment and Biology,Hengyang 421005,China;Chool of Basic Medical Sciences,Hengyang Medical School of University of SouthChina,Hengyang 421001,China)
出处
《湖南生态科学学报》
2021年第4期22-31,共10页
Journal of Hunan Ecological Science
基金
湖南省农业资源与环境保护项目(2018N233)。
关键词
外来入侵物种
分布
等级划分
alien invasive species
distribution
rating