【作者】 李蕾鲜；

【导师】 范航清；

【作者基本信息】 广西大学 ， 生态学， 2008， 硕士

【摘要】 本研究通过对白骨壤、鱼木、银叶树、红鳞蒲桃、喙果皂帽花、岭南山竹子、下龙新木姜、豺皮樟八种植物叶片盐分和研究地的土壤盐分进行分析,初步界定广西滨海过渡带的边界。本研究在红鳞蒲桃生态分布集中地设置了四个样地,采用野外调查和室内分析相结合的方法对红鳞蒲桃群系进行研究,以达到对红鳞蒲桃群系的初步认识,同时对广西滨海植被生态恢复起着重大的作用。对土壤和植物盐分的分析的结果表明:从内滩到岸上土壤中氯离子的含量呈递减状态,八种植物叶片中氯离子含量表现出相同的趋势,初步说明土壤和植物中盐分表现出一致性。通过对红鳞蒲桃群落的调查以及分析结果表明:红鳞蒲桃群系由四个群丛组成,分别是:红鳞蒲桃+下龙新木姜—九节+罗伞群落、红鳞蒲桃—乌药+山姜群落、红鳞蒲桃+滨木患—酒饼筋—海芋群落、红鳞蒲桃+鹊肾树—罗伞树+龙船花群落。(1)从群落中植物的种类组成上来看,是比较复杂的,在200～400 m~2的范围内约有林木14～21种,分属11～19科,再加上灌木,草本和藤本的种类达到40～60种,分属23～37科。从群落的组成和生境来看,红鳞蒲桃适宜在潮湿生境中生长,并具有喜阳的生态特性。(2)红鳞蒲桃群落的多样性指数表明:各群落生长型均呈现为灌木层物种多样性指数较乔木层高;乔木层均匀度高于灌木层;四个群落的相异系数都很高,说明四个群落是不同的类型;通过极点排序结果表明四个群落的类型各不相同,与本文之前的分类结果一致。从群落演替角度来看,红鳞蒲桃群落处于稳定状态。通过对典型样地的景观现状分析,说明对滨海过渡带原生植被保护的紧迫性。更多还原

【Abstract】 This study through analyze the salinity of Avicennia marina,Crateva formosensis,Heritiera littoralis,Syzygium hancei,Dasymaschalon rostratum, Garcinia oblongifolia,Neolitsea alongensis,Litsea rotundifolia var. oblongifolia eight Plants’ leavesand the soil of the study plots to initially define the coastal ecotone border of Guangxi.Four plots were sampled in ecological distribution center of Syzygium hancei,to research,analyze and understand Syzygium hancei formation.This plays an important role in ecological restoration of coastal vegetation of Guangxi.The results of study on the salty of soil and plant showed as follow:From the beach to the shore in the soil of the Cl~- content was reduced,and eight plants Cl~- content in the leaves show the same trend,the initial description of salty for soil and leaves are the same trend. The results of the survey and analysis of Syzygium hancei community showed as follows Syzygium hancei formations are composed of four associations:Syzigium hancei+ Neolitsea alongensis-Psychotria rubra+ Ardisia quinquegona community,Syzigium hancei- Lindera aggregata+Alpinia japonica community,Syzigium hancei+ Arytera littoralis-Atalantia buxifolia-Alocasia macrorrhiza community,and Syzigium hancei+ Streblus asper-Ardisia quinquegona+Ixora chinensis community.(1)The communities composition of Syzygium hancei is diversiform,which there are 14-21 arbor species and 11-19 families,40-60 species shrub, herbaceous and vine,23 -37 families in the community of 200～400 m~2.From the communities composition and habitats,Syzygium hancei aptly grows in moist places but at the same time,it is light plant.(2)Syzygium hancei community diversity index showed as follows the species diversity index of shrub layer is higher than arbor layer for the growth form of all the communities;the arbor layer is higher than shrub layer in evenness;the different communities have a high coefficient;The result of the PO showed that the four communities are different types,the classification results are as consistent as before.From the succession of community,Syzygium hancei community stay in a stable state.The analysis of typical plot landscape shows that the protection of coastal ecotone vegetation is very urgent.更多还原