摘要
利用物种丰富度指数、Shannon-Wiener多样性指数和Pielou均匀度指数3个指数，对云南糯扎渡自然保护区8种热带林群落物种多样性沿群落类型梯度、群落结构梯度和海拔梯度的分异情况进行分析，结果表明：（1）8种热带林群落以千果榄仁—粗穗石栎群落物种多样性最为丰富，千果榄仁—普文楠群落最不丰富。（2）按照8种热带林群落的群落结构分层计算，乔木层以绒毛番龙眼--大省藤群落物种多样性最为丰富，榆绿木-火绳树-黄竹群落最不丰富；灌木层以降真香—假鹊肾树--密花树群落物种多样性最为丰富，绒毛番龙眼--大省藤群落最不丰富；草本层以澜沧栎--火绳树--余甘子群落物种多样性最为丰富，西南紫薇—粉花羊蹄甲群落最不丰富；藤本层以千果榄仁--粗穗石栎群落物种多样性最为丰富，榆绿木--火绳树--黄竹群落最不丰富。（3）不同海拔段其热带林群落物种多样性不同。海拔900～1050m和1200～1820m区段是糯扎渡自然保护区热带林群落物种多样性相对较丰富的地区，760～900m和1050～1200m区段热带林群落物种多样性相对较差。（4）人为干扰是造成糯扎渡自然保护区热带林群落物种多样性下降的关键因素。
Analysis was made on gradient differentiation of species diversity of 8 tropical forest communities in Nuozhadu Nature Reserve, Yunnan province （Form Terminalia myriocarpa-Lithocarpus elegans, T. myriocarpa-Phoebe puwenensis, Pometia tomentosa-Calamus wailing, Alangium chinense-Styrax sp.-Michelia floribunda-Sapium baccatum, Acronychia pedunculata-Streblus indica-Rapanea neriifolia, Anogeissus acuminata var. lanceolata-Eriolaena spectabilis-Dendrocalamus membranaceus, Lagerstroemia intermedia-Bauhinia variegata var. candid, a, and Quercus kingiana-E, spectabilis-Phyllanthus emblica） in relation to community type, structure and altitudes by 3 indexes （species richness index, Shannon-Wiener diversity index, and Pielou evenness index）. The result showed that the form T. myriocarpa-L elegans had the richest species diversity, T. myriocarpa-Ph, puwenensis was the last one. Form P. tomentosa-C, wailong has the richest species diversity at arbor layer, An. acuminata vat, lanceolata- E. spectabilis-D, membranaceus was the last. Form A, pedunculata-S, indica-R, neriifolia has the richest species diversity at shrub layer, P. tomentosa-C, wailing was the last one. Form Qu. kingiana-E, spectabilis -Ph. emblica has the richest species diversity, L. intermedia-B, variegata vat. candida was the last one. Form T. myriocarpa-L elegans has the richest species diversity at liane layer, A. acuminata vat lanceolata-E, spectabilis -D. membranaceus was the last one. Forest communities of the nature reserve had different species diversity at altitude zones, but relative richer at 900 - 1 050 m and 1 200-1 820 m. The most important reason for decrease of species diversity of tropical forest communities was disturbance.
出处
《浙江林业科技》
北大核心
2008年第3期1-7,共7页
Journal of Zhejiang Forestry Science and Technology
关键词
热带林群落
物种多样性
测度
梯度分异
自然保护区
云南
tropical forest communities
species diversity
gradient differentiation
nature reserve
Yunnan
