CAJ | 학술논문

植物区系和物种多样性的研究对于理解物种的起源、进化历史和生物多样性的形成机制具有重要意义.藏东南地区拥有特殊的地质历史和丰富的植物多样性,有关该地区植物区系地理的研究具有十分重要的意义.利用大尺度的物种分布数据,结合植物类群和区系组成分析,探讨了该地区的植物区系组成和物种多样性.结果表明,研究区域共拥有种子植物3114种,分属于153科,876属.进一步分析,我们发现藏东南地区拥有西藏地区种子植物科总数的88%,属总数的78%和物种总数的54%,而其国土面积仅占西藏地区国土总面积的10%左右.因此,研究认为藏东南地区可能是西藏地区植物多样性的热点地区之一.在科的水平上,泛热带分布成分占较大比重(51%),其次为北温带分布成分(22.6%).在属的水平上,所占比重较大的是北温带分布成分(21%)和泛热带分布成分(15.5%).从总体构成来看,在科的水平上,热带区系成分比重占到了70%左右;但在属的水平上,热带区系比重仅占44%左右.科、属水平上不同的区系组成,尤其是温、热带区系成分比重的巨大差异,可能与科和属所代表的不同地质历史以及青藏高原的隆升有关.与此同时,相比西双版纳地区和南滚河自然保护区,独龙江地区的植物区系与藏东南之间存在着更为紧密的区系联系.
식물구계화물충다양성적연구대우리해물충적기원、진화역사화생물다양성적형성궤제구유중요의의.장동남지구옹유특수적지질역사화봉부적식물다양성,유관해지구식물구계지리적연구구유십분중요적의의.이용대척도적물충분포수거,결합식물류군화구계조성분석,탐토료해지구적식물구계조성화물충다양성.결과표명,연구구역공옹유충자식물3114충,분속우153과,876속.진일보분석,아문발현장동남지구옹유서장지구충자식물과총수적88%,속총수적78%화물충총수적54%,이기국토면적부점서장지구국토총면적적10%좌우.인차,연구인위장동남지구가능시서장지구식물다양성적열점지구지일.재과적수평상,범열대분포성분점교대비중(51%),기차위북온대분포성분(22.6%).재속적수평상,소점비중교대적시북온대분포성분(21%)화범열대분포성분(15.5%).종총체구성래간,재과적수평상,열대구계성분비중점도료70%좌우;단재속적수평상,열대구계비중부점44%좌우.과、속수평상불동적구계조성,우기시온、열대구계성분비중적거대차이,가능여과화속소대표적불동지질역사이급청장고원적륭승유관.여차동시,상비서쌍판납지구화남곤하자연보호구,독룡강지구적식물구계여장동남지간존재착경위긴밀적구계련계.
@@@@The studies on floristic composition and species diversity are of great significance to understand the origin, evolution and underlying mechanism of flora and plant diversity. Southeast Tibet is characterized by special geologic history and high richness of plant diversity, and the study on floristic composition and plant diversity in this region is of great importance. In this paper, we examined the plant diversity and floristic composition in southeastern Tibet, based on large scale information of phytogroup and floristic composition. Our results showed that southeastern Tibet holds a total of 3114 species of seed plants, subordinated in 153 families, 876 genus. Further investigations showed that the studied area constituted 88%, 78%, 54%of the total number of families, genus and species in the Tibet respectively, with only 10%of the total land area. Therefore, we suggested that the studied area may be the one of the hotspots of plant diversity in the Tibet region. At the family level, Pantropical elements gained domination (51%), followed by the North Temperate elements (22.6%). In the genus level, the largest proportion is the North Temperate elements (21%) and Pantropic elements (15.5%). We also observed that at the family level, tropical elements accounted for about 70%, while at genus level, tropical elements accounted for only about 44%. This vast contrast of floristic composition, especially the big difference of temperate and tropical elements may be due to the different geological implications of families and genus, and the Qinghai-Tibet plateau uplift. We also found that compared with Xishuangbanna areas and Nangun River Nature Reserve, flora in Drung river regions showed much stronger associations with those in the studied area.