文献类型：期刊文献

中文题名：乌兰布和东北部荒漠-绿洲生态交错带植被特征及其群落多样性研究

英文题名：The vegetation characteristics and community diversity in the ecotone of desert-oasis in Ulan Buh Desert

作者：张瑞[1] 刘芳[1] 郝玉光[1] 张景波[1]

第一作者：张瑞

机构：[1]中国林科院沙漠林业实验中心

年份：2011

卷号：25

期号：7

起止页码：196-200

中文期刊名：干旱区资源与环境

外文期刊名：Journal of Arid Land Resources and Environment

收录：北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；CSSCI:【CSSCI2010_2011】；

基金：林业公益性行业科研专项(201004010-03)资助

语种：中文

中文关键词：乌兰布和沙漠;生态交错带;群落多样性

外文关键词：Ulan Buh desert; ecotone; plant diversity

分类号：Q948.15

摘要：以2009年9月乌兰布和沙区植物群落样方调查资料为基础,对其农牧交错带内不同生境的植被特征及其物种多样性进行研究。结果表明:在区域干旱气候的共同背景下,由于受人工绿洲灌溉水分水平运动影响的强度不同,导致该生态交错带内山前洪积扇、人工绿洲周边、绿洲外围植被的组成及其群落多样性差异显著,水平空间尺度上群落变异性大,构成群落的优势种明显不同。绿洲低湿地由于充足的土壤水分条件,无论是丰富度还是多样性指数都远高于其他样地类型,Shannon-wiener多样性指数D高达2.3261;绿洲边缘天然植被和人工林虽然多样性指数D相差不大分别为0.896和0.738,但天然植被均匀度0.6581明显大于人工林0.2222,优势度C 0.561明显小于人工林0.797,表明天然植被群落结构复杂,稳定性强;绿洲外围固定、半固定及流动沙地随着植被盖度的递减,群落结构趋于简单,物种丰富度、多样性指数、均匀度指数、生物量均呈显著下降的趋势。揭示出荒漠-绿洲交错带内的植被在人工绿洲可持续发展的作用及对防护林体系建设的重要启示。
In September 2009,the plant community plots were surveyed,and the vegetation characteristics and community diversity in the ecotone from desert to oasis in Ulan Buh Desert were studied,The results showed that due to the dry climate in the region and the different oasis irrigation effect intensity,the composition and diversity of vegetation are significantly different,dominant species composition is different in the ecotone in the alluvial fan,the surrounding oasis and oasis outside.Because of adequate soil moisture in wet lowland,eather its richness or diversity indices are much higher than other types of plots,the diversity index is as high as 2.3261;although the diversity index of the natural vegetation and plantations in oasis edge are respectively 0.896 and 0.738,the evenness of the natural vegetation（0.6581） is significantly greater than the plantation（0.2222）,and dominance is significantly less than plantation,indicating that the complex structure of natural vegetation communities is stable;vegetation cover is decreasing from fixed,semi-fixed to mobile sand,and the community structure becomes simpler,species richness,diversity index,evenness,biomass show a significant downward trend.Which indicats the importance function of vegetation to the sustainable development of ecotone oasis and forest system protection.