巫溪县白果林场珙桐群落生态特征研究  

Study on Ecological Characteristics of Davidia involucrata Community in Baiguo Forest Farm of Wuxi County

作　　者：郝云庆[1] 李旭光[1] 丁易[1] 韩晨霞[1] 张世均 吴炳清 张深涛 

机构地区：[1]西南师范大学生命科学学院 [2]缙云山自然保护区管理处

出　　处：《西南师范大学学报（自然科学版）》2003年第6期958-962,共5页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：长江水利委员会水土保持局资助项目([2002]-12号);重庆市科委资助项目(2003-6202).

摘　　要：在采用样方法调查的基础之上,分析了巫溪县白果林场珙桐群落的结构组成和物种多样性特征.研究结果表明:白果林场存在着以珙桐(Davidiainvolucrata)为主的珍稀濒危植物群落,其组成中珍稀濒危植物种类丰富,除珙桐外还有水青树(Tetracentronsinense)、连香树(Cercidiphyllumjaponicum)、红豆杉(Taxuschinensis)、领春木(Eupteleapleiospermum)、巴山榧(Torreyafargesii)和八角莲(Dysosmaversipells);群落中珍稀濒危植物多为建群种或共建种,其植株高大,优势地位突出;由于群落处于顶极阶段,群落的香农—威纳指数较低,为2 358～2 789,生态优势度和均匀度较高,分别为0 172～0 376和0 752～0 838;群落具有极高的保护价值和科研价值.On the basis of quadrat investigation of Davidia involucrata community, structure and species diversity of the community were analyzed in Baiguo forest farm of Wuxi county. The results showed that there was a Davidia involucrata community, comprising abundant rare and endangered plants, in Baiguo forest farm of Wuxi county. Besides Davidia involucrata, there were also Tetracentron sinense、 Cercidiphyllum japonicum、 Taxus chinensis、 Euptelea pleiospermum、 Torreya fargesii and Dysosma versipells in it. Most of the rare and endangered plants were edificators and co-edificators with giant individuals and obvious dominance in the community. Because of at its climax stage, Shannon-Wiener indexes of the community were low, 2358-2789. Ecological dominance and Evenness were great relatively, each was 0172-0376 and 0752-0838. There is great value of conservation and research of the community.

关 键 词：巫溪县 白果林场 珙桐群落 生态特征 物种多样性 珍稀濒危植物 生态优势度 

分 类 号：S792.99[农业科学—林木遗传育种] Q948.15[农业科学—林学]