摘要
【目的】了解海南石灰岩地区种子植物区系组成、性质等基本特征.【方法】野外实地调查、标本采集与鉴定,数据统计分析.【结果和结论】海南石灰岩地区现共记录种子植物1 176种58变种1变型,隶属于142科645属,其中裸子植物5科5属7种,被子植物137科640属1 169种58变种1变型.具有明显的热带性质,以热带、亚热带成分尤其是热带亚洲成分为主,热带、亚热带成分分别占总科数和总属数的73.24%和87.75%;温带成分在海南石灰岩地区得到一定的发展,温带性质科占总科数的11.97%,属占总属数的7.29%.该地区物种丰富,以占不到全岛2%的面积,分布高达27.26%的种类,但属内种类较为贫乏,以单种科和寡种科为主,共计113科,占总科数的79.58%;中国特有属有2属.
[Objective]The purpose of this study was to reveal the floristic composition and characteristics of seed plants in limestone areas in Hainan .[Method]Extensive field work , specimens collection and i-dentification were conducted to collect data for the analysis .[Result and conclusion]A total of 1 176 spe-cies, 58 varieties and 1 forma belonging to 645 genera and 142 families were recorded .The tropical and subtropical distribution elements , especially tropical Asia ones , were dominant in the limestone flora in Hainan.The tropical and subtropical distribution families accounted for 73.24%of the total and the gen-era accounted for 87.75%.The proportions of temperate distribution families and genera accounted for 11.97%and 7.29%, respectively .The limestone areas contributed about 27.26%to the total number of species with less than 2%land area of the whole island .However, many genera include only one or very few species .There are 113 single and few species families , accounting for 79.58%of the total families . There are 2 genera endemic to China .
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2014年第3期90-99,共10页
Journal of South China Agricultural University
基金
国家自然科学基金(30270122)
国家科技基础性工作专项(2008FY110400)
