文献类型：期刊文献

中文题名：毛乌素沙地水源圈植物群落的分布格局

英文题名：Plant community patterns of piosphere in the Mu Us Sandland of China

作者：喻泓[1,2] 吴波[3] 何季[3] 贾子毅[3] 闫峰[3]

第一作者：喻泓

机构：[1]北京市门头沟区科技开发实验基地;[2]北京山地生态科技研究所;[3]中国林业科学研究院荒漠化研究所

年份：2015

卷号：26

期号：2

起止页码：388-394

中文期刊名：应用生态学报

外文期刊名：Chinese Journal of Applied Ecology

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；PubMed;

基金：国家科技支撑计划项目(2012BAD16B01)资助

语种：中文

中文关键词：植物功能群;格局;水源点;非线性回归;间接梯度分析

外文关键词：plant functional type ; pattern ; watering point; nonlinear regression ; indirect gradientanalysis.

分类号：Q145.2;Q948

摘要：水源圈是干旱地区普遍存在的现象.以毛乌素沙地围栏牧场水源点为中心,在辐射状样带上等间距取样调查10户围栏牧场的植物群落,并对植物群落及植物功能群的丰富度、盖度与其距水源点距离进行回归分析和间接梯度分析.结果表明:随着距水源点距离的增加,毛乌素沙地植物群落的特征呈现出明显的梯度变化,植物群落及其功能群的丰富度增大,植物群落总盖度、灌木和禾草的盖度均表现出增加趋势,而杂类草的盖度却呈现下降趋势.植物群落结构和组成的变化反映了水源点附近沙地上的放牧梯度.水源圈是研究我国北方地区草场退化格局及其驱动因素的切入点.
Piosphere is ubiquitous in drylands. Plant communities of ten paddocks were lnvestlgatea along transects starting from watering points in the Mu Us Sandland. By using the method of regres- sion and indirect gradient ordination, the richness of plant community and plant functional types were analyzed. The results showed that with the increase of distance from the watering points, the traits of the plant communities varied significantly. The coverage of the community, shrubs and gras- ses gradually increased and the coverage of forbs decreased with the distance increasing from the watering points. The patterns of the community richness and coverage suggested the grazing gradient surrounding the watering points. The piosphere is a breakthrough point to reveal the degradation pat- tern of rangeland and its driving forces in northern China.