澜沧江糯扎渡季雨林厚皮树+家麻树群落的研究  

Study on the monsoon forest of Lannea coromandelica+Sterculia pexa community in the valley of lower Lancang River

作　　者：周仕顺[1] 王洪[1] 朱华[1] 

机构地区：[1]中国科学院西双版纳热带植物园,云南勐腊666303

出　　处：《广西植物》2007年第3期475-481,502,共8页Guihaia

基　　金：国家自然科学基金(30570128);中国科学院知识创新工程~~

摘　　要：根据5个20m×25m样地的调查资料,对分布于澜沧江糯扎渡河岸山地,以厚皮树、家麻树为优势种的季雨林群落进行了分析研究,结果显示:(1)该群落乔木层以落叶成分厚皮树和家麻树为优势种,层间以常绿的大型木质藤本云南翅子藤为特征;(2)在群落2500m2样地内,共计维管束植物72种,隶属于38科65属;其中有乔木25种,草本植物25种,灌木10种和层间藤本植物12种;(3)综合5个样地后计算所得群落乔木层树种丰富度为25种,Shannon-Wiener指数为2.9010,Pielou均匀度指数为0.9012,Simpson指数为0.9346,在群落中,随着乔木径级的增大,个体数和种数逐渐减小;(4)该群落主要以高位芽植物为主,并以中高位芽植物为优势,占所统计总种数的35.8%;(5)该群落中落叶种类占总种数的62.5%,中叶占47.2%,小叶占41.7%,单叶占69.4%,纸质叶占61.1%,全缘叶占56.9%;(6)该群落的物种数/样地面积关系曲线显示在取样面积1000m2时开始趋于平缓,意味着该取样面积可以考虑作为群落最小取样面积。The less known monsoon forest on banks of lower Laneang River was studied based on sampling plot surrey. The following results are given;（1） The forest is dominated by deciduous tree species Lannea coromandelica and Sterculia pe：ca ,and evergreen liana species Loeseneriella yunnanensis ; （2）72 vascular plant species of 65 genera in 38 families were recorded from a sampling area of 2 500 m^2,of which 25 are tree species, 25 are herbaceous species, 10 shrub species and 12 liana speeies; （3）Shannon-Wiener diversity index is 2. 901 0,Pielou Evenness 0. 901 2,Simpson index 0. 934 6 for tree speeies; （4）The forest is dominated by phanerophytes,of which meso-phanerophytes make up 35. 8% of the total speeies; （5）Deciduous species make up 62.5% of the total species,and the forest dominated by species with mesophyllous leaves（making up 47.2 %）,and species with simple and entire leaves; （6）The species/area curve shows that it is flatten at 1 000 m^2 ,which could be the minimum sampling area for the forest.

关 键 词：澜沧江下游 季雨林 群落特征 

分 类 号：Q948.15[生物学—植物学]