摘要
本文在对我国盘菌资源调查的基础上 ,分析研究了热带地区粒毛盘菌属真菌的物种多样性。本研究共分析45 1份标本 ,属于 35个分类单位 ,其中Lachnumabnormevar.abnorme ,L .brasiliense,L .flavidulum ,L .pteri dophyllum ,L .sclerotii和L .virgineum 6个种的个体数量均在总数的 6 %以上 ,占已观察标本总数的 73 .4% ,是我国热带地区的常见种。物种多样性分析表明 ,海南的物种丰富度 (S =2 2 )和多样性指数 (H′ =2 .6 6 96 )最高 ,云南与广西的物种丰富度相似。采用群落系数 (coefficientofcommunity ,cc)比较了不同地区的物种分布相似性。本文还试图探讨物种分布与海拔高度、生境、基物间的关系。粒毛盘菌属真菌在海拔 6 0～ 2 70 0m的地带均有分布 ,由于调查和取样的局限性 ,物种随海拔高度变化的规律不明显 ;地理分布上大致可分为世界性分布、间断性分布和地方特有三种分布型。
Species diversity of Lachnum from tropical China was investigated. Four hundred and fifty-one specimens of the genus were involved and they belong to 35 taxa. Of them, Lachnum abnorme var. abnorme, L. brasiliense, L. flavidulum, L. pteridophyllum, L. sclerotii and L. virgineum account for 73.4% of the specimens examined and are the most common species occurring in tropical China. The results indicate that species richness (S=22) and diversity index (H′=2.6696) are highest in Hainan, and that species richness in Yunnan is the same as that in Guangxi. The coefficient of community (cc) was used to compare the floristic similarity of different areas. Impact of elevation, habitat, and substrate on species composition was also discussed. Within the 100～2000 m asl zone where the genus is found, three distribution patterns of Lachnum were identified: cosmopolitan, disjunct, and endemic.
出处
《生物多样性》
CAS
CSCD
2003年第2期141-146,共6页
Biodiversity Science
基金
国家自然科学基金资助项目。
