基于TWINSPAN分类的毛乌素沙地油蒿群落荒漠化评价  

Desertification Evaluation Research on Artemisia ordosica Community in Mu Us Sandland Based on TWINSPAN Classification

作　　者：王妍[1,2] 吴波[2] 李小英[1] 熊好琴[1] 

机构地区：[1]西南林业大学环境科学与工程系,云南昆明650224 [2]中国林业科学研究院荒漠化研究所,北京100091

出　　处：《西南林学院学报》2010年第5期6-10,17,共6页Journal of Southwest Forestry College

基　　金：中央级公益性科研院所基本科研业务费专项资金(CAFYBB2007042)资助;国家科技支撑计划项目(2006BAD26B01)资助

摘　　要：采用群落数量分类学TWINSPAN方法将油蒿群落划分为油蒿+沙米群落,油蒿+虫实、沙米群落,油蒿+以沙生植物为主的杂类草群落,油蒿+杂类草、禾草群落,油蒿+以中生植物为主的杂类草群落共5种类型。通过对野外调查数据的分析,将群落主要影响因子压缩为土壤性状因子、物种多样性信息因子和群落生物量盖度信息因子,尝试从评价群落特征变化的角度探讨荒漠化状态评价的方法,以期为以群落水平为基础的较小尺度荒漠化状态评价提供参考,同时为退化草场的利用和管理提供理论指导。通过统计分析和适当调整,最终得出,油蒿群落的TWINSPAN分类结果能够反应目前毛乌素沙地的退化状态,可作为荒漠化程度划分的方法。With the quantitative community classification method TWINSPAN,the Artemisia ordosica communities in Mu Us Sandland were classified into five types,i.e.,Artemisia ordosica＋Agriophyllum pungens community,Artemisia ordosica＋Agriophyllum pungens/Corispermum heptapotamicum community,Artemisia ordosica＋herbaceous vegetation dominated by desert plants community,Artemisia ordosica＋weeds/gramineous grasses community and Artemisia ordosica＋herbage layer dominated by mesophyte community.Based on analyzing the field survey data,the principal factors influencing upon the community composition and characteristics were categorized into three factors,i.e.,pedologic properties,species diversity information and biomass and coverage information of the communities.The desertification grade evaluation was discussed from the point of views for assessing the changes of community characteristics,so as to provide the smaller scale desertification grade evaluation on community level,and the utilization and management of degraded grassland with theoretical guidance for reference.Through statistical analysis and appropriate adjustment,it was proven by the results that the classification of Artemisia ordosica communities by TWINSPAN could well represent the degradation process of Mu Us Sandland and TWINSPAN methodology could be applied to evaluation of desertification development.

关 键 词：TWINSPAN 荒漠化评价 油蒿群落 毛乌素沙地 

分 类 号：S714.6[农业科学—林学] S158.1