Diversity Characteristics of Asteraceae Plants in Dehang Geopark,Hunan Province
[Objective]It is to study the current situation of Asteraceae plant resources in Hunan Dehang Geopark,so as to provide a scientific basis for the protection and utilization of plant resources in this area.[Method]The species diversity,geographical flora,life habits and functional traits of Asteraceae in Dehang Geopark were statistically analyzed by means of field investigation,specimen collection and identification,and literature review.[Result](1)There are 59 genera and 118 species of Asteraceae plants in Dehang Geopark,which are divided into 14 tribus,among which Cichorieae,Astereae,Senecioneae and Anthemideae are the main ones.The plants of the Asteraceae family in this area is the most abundant in monospecific genera(41 genera),followed by oligospecific genera(16 genera),and the least multispecific genera(2 genera).There are 3 endemic species of Dehang region,namely Sinosenecio jishouensis,Aster jishouensis and Aster atropurpurea.(2)The geographical composition of the flora is relatively complex,and there are 12 areal-types of genera,most of which are temperate areal-types.There are 14 areal-types of species,which are endemic to China and East Asia,including variations.(3)The life habits are mainly perennial herbs,comprising 73 species,accounting for 61.86%of the total species,followed by annual or biennial herbs,including 42 species,accounting for 35.59%of the total species.(4)The trophic traits of Asteraceae plants are mainly characterized by small to medium-sized leaves,simple leaves,alternate phyllotaxy,papery texture,entire margins,serrate,and glabrous on both surfaces.The reproductive traits are mainly characterized by monoecy,apical umbel inflorescences,achenes,and wind dispersal.The flowering period is mainly concentrates from June to October,and the fruiting period is concentrated from July to October.[Conclusion]In Hunan Dehang Geopark the Asteraceae plant species are abundant,the geographical composition of the flora is complex,the endemic phenomena are obvious,and the functional traits are diverse,which should be paid attention to and protected.
Asteraceaegeographical componentsplant resourcesdiversity of functional traitsDehangXiangxi World Geopark
万方数据
维普
