广西海洋山自治区级自然保护区维管植物区系研究

Study on the Flora of Vascular Plants in Haiyang Mountain Nature Reserve of Guangxi

在野外调查的基础上,对广西海洋山自治区级自然保护区维管植物区系进行研究。结果表明:(1)该区共有维管植物168科469属714种,其中石松类与蕨类植物37科73属137种,分别占广西石松类与蕨类植物科、属、种的66.1%、47.1%、16.5%;裸子植物5科6属7种,分别占广西裸子植物科、属、种的62.5%、31.6%、11.3%;被子植物126科390属570种,分别占广西被子植物科、属、种的56.6%、25.8%、8.3%。(2)该区种子植物科、属优势现象明显,以菊科Asteraceae、蔷薇科Rosaceae、茜草科Rubiaceae为优势科。(3)该区石松类与蕨类植物属种组成多样性较高,单种科、属分别有20科、45属,占保护区维管植物总科数的54.1%、总属数的61.6%。(4)该区植物区系成分复杂,在科级水平上,种子植物有11个分布类型,泛热带分布有62科,占总科数的47.3%;而蕨类植物科的分布区类型以热带、泛热带分布和热带至亚热带分布的科为主,共有25科,占总科数的67.6%。在属级水平上,种子植物有13个分布型,热带分布211属,占总属数的53.3%;而蕨类植物有9个分布类型1个变型,以热带亚热带成分为主,共有45属,占蕨类植物总属数的61.6%。

Based on field investigation,the flora of Haiyang Mountain Nature Reserve in Guangxi was studied.The results showed that:(1)There are 714 species of wild vascular plants belonging to 469 genera and 168 families.Among them,include 37 families,73 genera and 137 species of ferns,accounting for 66.1%,47.1%and 16.5%of the total families,genera and species in Guangxi,respectively;5 families,6 genera and 7 species of gymnosperms,accounting for 11.3%,31.6%and 62.5%of the total families,genera and species in Guangxi,respectively;126 families,390 genera and 570 species of angiosperms,accounting for 8.3%,25.8%and 56.6%of the total families,genera and species in Guangxi,respectively.(2)The dominance of family and genera of seed plants in this area is obvious,with Asteraceae,Rosaceae and Rubiaceae as the dominant families.(3)The diversity of genera and species composition of ferns in this area is higher,with 20 single-species families and 45 single-species genera accounting for 54.1%of the total families and 61.6%of the total genera of vascular plants,repectively.(4)The flora composition in this area is complex.At family level,there are 11 distribution types of seed plants,with 62 pantropic families accounting for 47.3%of the total families;while the distribution types of ferns are mainly dominated by tropical,pantropic and tropical to subtropical elements,with 25 families accounting for 67.6% of the total families.At genus level,there are 13 distribution types of seed plants,with 211 tropical genera accounting for 53.3%of the total genera;and 9 distribution types and 1 variants of ferns,dominated by tropical and subtropical components,totally with 45 genera accounting for 61.6%of the total genera of ferns.