摘要
为了解南宁市野生种子植物区系特征,给该区域生物多样性的保护与合理开发利用提供科学基础,笔者调查和分析其植物资源,采用文献收集、线路调查和样方调查的统计方法编制出南宁市野生种子植物名录,运用聚类分析法和主成分分析法判断其与15个临近地区的亲缘关系,分析其区系特征。结果表明:南宁市野生种子植物共197科1114属3576种,裸子植物8科14属24种,被子植物189科1100属3552种,占广西种子植物科数、属数、种数比值分别为77.87%、60.02%、42.90%,说明南宁市野生种子植物丰富多样。大科占比为27.41%,所含种数占78.44%,为区系中的主要成分。单种属和寡种属占总属数的85.28%,但中等属和多种属所含种数占总种数51.65%,表明科属种类丰富但分化程度较低。该区系有14个属级分布区类型,地理成分丰富复杂,其中热带成分占总属数69.55%,温带成分占22.16%,呈现明显热带属性,兼具部分温带属性。区域内珍稀濒危植物223种,种类丰富,其中兰科(Orchidaceae)、金花茶(Camellia petelotii)等特有植物种类多,广西植物区域特征明显,保护价值高。该区系属于北部湾地区和滇黔桂地区,与临近地区相比,其热带地理成分和温带地理成分的比值(R/T)为3.08,处于中间值,与黔桂边境六县R/T值(2.32)相近,与广西北部湾海岸带R/T值(8.80)相差最大,且R/T值与纬度呈负相关。在属级植物地理成分上,南宁市与海南省、云南省西畴县相似度最高,联系最紧密,与西藏自治区墨脱县最为疏远。整体来说,南宁市野生种子植物区系物种丰富,孑遗古老,珍稀濒危植物较多,呈现热带、亚热带过渡性质,体现出北部湾和滇黔桂植物区系特征。
In order to understand the characteristics of the wild seed plant system in Nanning and provide a scientific basis for the conservation and rational development and utilization of biodiversity in the region,the author investigated and analyzed its plant resources,compiled a list of wild seed plants in Nanning using statistical methods of literature collection,line survey and sample survey,judged their affinities with 15 neighboring areas using cluster analysis and principal component analysis,and analyzed their systemic characteristics,the results show that:there are 3574 species of wild seed plants in 197 families and 1114 genera in the region,24 species of 14 genera in 8 families of gymnosperms and 3552 species of 1100 genera in 189 families of angiosperms.The ratio of the number of seed plant families,genera and species in Guangxi is 77.87%,60.02%and 42.90%respectively,indicating that the wild seed plants in Nanning are rich and diverse.The ratio of large families is 27.41%,and the number of species contained is 78.44%,which is the main component of the system.Monospecific and oligospecific genera accounted for 85.28%of the total number of genera,but the number of species contained in medium and multiple genera accounted for 51.65%of the total number of species,indicating that the family is rich in species but less differentiated.There are 14 genus-level distribution area types in the region,with rich and complex geographical components,among which tropical components account for 69.55%of the total number of genera and temperate components account for 22.16%,showing obvious tropical attrib-utes and some temperate attributes.223 rare and endangered plants in the region,rich in species,including Orchidaceae,Camellia petelotii and other endemic plant species,the regional characteristics of Guangxi plants are obvious,and the protection value is high.The system belongs to the Beibu Gulf region and the Yunnan-Guizhou-Guangxi region,and its R/T value(3.08)is in the middle compared with the neighboring regions,similar
作者
莫楚欣
李林
和太平
MO Chuxin;LI Lin;HE Taiping(College of Forestry,Guangxi University,Nanning,Guangxi 530005,China;College of Architectural Arts,Guangxi Arts Uni-versity,Nanning,Guangxi 530005,China)
出处
《热带作物学报》
CSCD
北大核心
2023年第2期302-309,共8页
Chinese Journal of Tropical Crops
基金
国家自然科学基金项目(No.31960613)。
