摘要
以吊罗山3块不同海拔热带低地雨林次生林为研究对象,分析了物种丰富度、物种组成、树高和径级分布以及不同起测胸径各样地生物多样性。结果表明,各样地群落有强的热带性,但同时具有热带-亚热带性质。样地乔木科属种组成丰富,单种科和单种属有较高的比例,不同海拔样地乔木树种都有较高的丰富度,中等海拔的样地最高。整个热带低地雨林次生林缺乏大乔木,群落整体低矮,胸径较小,目前未达顶级状态,植被处于旺盛的发展阶段。群落整体多样性较高,随起测胸径的增加,Shannon-wiener指数降低,中海拔样地由于有3个优势种,影响了其整体Shannon-wiener指数。Simpson指数随起测胸径增加而递减,但高海拔样地中≥2 cm起测胸径的Simpson指数由于富集种占比较高而较低。均匀度指数随起测胸径增加而增加,优势集中性指数显示出群落优势种的优势并不明显。与其它地区比较,吊罗山的热带低地雨林次生林乔木生物多样性较高。
The research is based on the study of 3 plots secondary tropical lowland rainforest that distribute different altitude in Diaoluoshan National Nature Reserve, Hainan province. This thesis has analyzed the biodiversity of the sample plots including its species richness, species composition, tree height distribution,diameter distribution and the diversity of different diameter class. The results were as follows: every community has strong tropical elements, but also has tropical- subtropical elements. All of the plots have a high family and genus of the tree species, the families and genus which has a single species has a higher proportion, moderate elevation plots has the highest species. Secondary forests throughout the tropical lowland rainforest is lack of huge trees, community are dwarf, diameter is small, they are not climax community, the vegetation is on exuberant development stage. The community has diversity, as the starting measured diameter at breast height increased, the Shannon-wiener index decreased. Because of the three advantageous spiciness, the medium altitude plot has a lower Shannon-wiener index. As the measured DBH increased, the Simpson index declined. Since the rich species has a higher rate, the Simpson index of DBH ≥2 cm is lower in highest plot. The Pielou index increased as the DBH increased. The dominant index shows that predominant species do not obtain obvious advantage. Compared with other regions, secondary forest of Diaoluoshan tropical lowland rainforest have a higher tree species biodiversity.
出处
《热带作物学报》
CSCD
北大核心
2015年第5期998-1005,共8页
Chinese Journal of Tropical Crops
基金
中国科学院战略性先导科技专项(No.XDA05050206
XDA05050302-2)
中西部高校项目(No.ZXBJH-XK004
ZXBJH-XK005
MWECSP-RT08)
国际科技合作计划项目(No.2007DFA31070/02)
国家自然科学基金项目(No.31260109)
海南省教育厅重点项目(No.Hjkj2012-03)
关键词
低地雨林
次生林
物种多样性
恢复阶段
Lowland rainforest
Secondary forest
Diversity of species
Recovery phase