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当前位置: 首页 > 文章 > 民勤绿洲-荒漠过渡带白刺群落空间分布及其环境解释 干旱区研究 2016,33 (5) 1003-1011
Position: Home > Articles > Spatial Distribution of Nitraria tangutorum Communities and Its Environmental Interpretations in the Minqin Oasis-desert Ecotone Arid Zone Research 2016,33 (5) 1003-1011

民勤绿洲-荒漠过渡带白刺群落空间分布及其环境解释

作  者：
赵鹏;徐先英;屈建军;尉秋实;张进虎;马俊梅;孙涛;吴永梅
单  位：
巴里坤哈萨克自治县花园乡人民政府林业工作站;甘肃省治沙研究所荒漠化与风沙灾害防治国家重点实验室培育基地;中国科学院寒区旱区环境与工程研究所敦煌戈壁荒漠研究站
关键词：
绿洲-荒漠过渡带;白刺群落;双向指示种分析;冗余分析;民勤
摘  要：
在野外植被-环境因子调查的基础上,采用双向指示种分析(TWINSPAN)和冗余分析(RDA)的方法,研究民勤绿洲-荒漠过渡带白刺群落空间分布与环境因子之间的关系。研究表明:1民勤绿洲-荒漠过渡带白刺群落物种组成简单,31个样方只出现17种植物,隶属8科,17属。2双向指示种分析将白刺群落划分为4个群丛类型,白刺-沙蒿+沙蓬,白刺+红砂-画眉草,白刺-芦苇+猪毛菜,白刺+黑果枸杞-盐生草。不同白刺群丛类型之间环境因子的差异性是其物种组成变化的原因。3 RDA样方-环境因子排序第一轴代表以地下水埋深为主的水分梯度,第二轴代表样方与绿洲不同距离沙源条件及土壤质地的变化。TWINSPAN划分的4个群丛类型在RDA排序图中聚集分布,分类与排序结果较为吻合。所选环境因子的蒙特卡罗检验结果表明,地下水埋深和样方与绿洲之间的距离对白刺群落空间分布有极显著的影响。
译  名：
Spatial Distribution of Nitraria tangutorum Communities and Its Environmental Interpretations in the Minqin Oasis-desert Ecotone
作  者：
ZHAO Peng;XU Xian-ying;QU Jian-jun;YU Qiu-shi;ZHANG Jin-hu;MA Jun-mei;SUN Tao;WU Yong-mei;Breeding Base of State Key Laboratory of Desertification and Aeolian Sand Disaster Combating,Gansu Institute of Desert Control Research;Dunhuang Gobi and Desert Research Station,Cold and Arid Regions Environmental and Engineer Research Institute,Chinese academy of sciences;Forestry station of Huayuan Township,Barkol Kazak Autonomous County;
关键词：
oasis-desert ecotone;;Nitraria tangutorum community;;TWINSPAN;;RDA;;Minqin
摘  要：
Based on the survey of plant and environmental factors,the methods of TWINSPAN and RDA were applied to research the relationships between the spatial distribution of Nitraria tangutorum communities and environmental factors in the Minqin oasis-desert ecotone. The results showed that the species composition of N. tangutorum communities was simple. There were only 17 plant species in 17 genera and 8 families obtained from 31 samples.The two-way indicator analysis( TWINSPAN) was used to classify the N. tangutorum communities into 4 types:Ass. Nitraria tangutorum-Artemisia. arenaria + Agriophyllum squarrosum,Ass. Nitraria tangutorum + Reaumuria soongarica-Eragrostis pilosa,Ass. Nitraria tangutorum + Phragmites australis-Salsola collina,and Ass. Nitraria tangutorum + Lycium ruthenicum-Halogeton glomeratus. The composition variation of N. tangutorum communities was resulted in by the difference of environmental factors. The classified results of TWINSPAN were reflected clearly in the RDA two-dimensional ordination diagram for samples and environmental variables. The first axis of RDA two-dimensional ordination showed the moisture gradient dominated by groundwater depth. The second one reflected the gradient of sand sources and soil texture in response to the distance between samples and oasis. The tested results of Monte Carlo permutation of the selected environmental factor revealed that the effects of groundwater depth and distance between oasis and samples on the spatial distribution of N. tangutorum communities were significant.

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