摘要
以哈巴湖自然保护区四儿滩湿地生态系统为例,采用样线调查方法研究半干旱地区湿地植物α及β多样性。结果表明:沿湿地-交错带-草原的生境梯度,α多样性变化较为明显。除均匀度指数外,其它多样性指数交错带均高于湿地及草原植被带,体现了群落交错带的边缘效应。不同方向α多样性测度结果表明,受地形、人为活动的影响,6条样线方向α多样性差异较大;β多样性测度结果和α多样性较为吻合,交错带与草原植被带的相似性系数最大,与湿地植被带的相似性系数次之,而草原植被带与湿地植被带的相似性系数最小。
The wetland plant α and β - diversity in semi - arid region were studied by taking Siertan wetland eco - system, Haba Lake Nature Reserve as an example. The line - transect method was used to survey the vegetation in the field. Study results showed that along the biotope gradient from wetland to grassland, α - diversity changed obviously. The diversity indices in ecotone were higher than that in the other two vegetation zone excepting evenness index. The α - diversities of six directions were obviously different by influence of topography and man＇s activity. The measure result of β-diversity was coincident with α -diversity. The comparability coefficient between ecotone and grassland zone was bigger than it between ecotone and wetland vegetation zone, and it was the least between wetland vegetation zone and grassland zone.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2009年第9期139-145,共7页
Journal of Arid Land Resources and Environment
基金
国家自然基金(30771764)资助
