干旱区生态环境知识资源中心(Arid): 不同沙化阶段高寒草甸植物群落与表土环境因子的关系

Arid

	不同沙化阶段高寒草甸植物群落与表土环境因子的关系
其他题名	Relationship between soil surface environmental factors and community characteristics of alpine meadow in different desertification stages
	王新源; 马仲武; 王小军; 陈萍; 唐霞; 连杰; 张琴; 程小云; 刘健; 曲浩
来源期刊	生态学报
ISSN	1000-0933
出版年	2020
卷号	40 期号:19
中文摘要	沙漠化是玛曲高寒草甸最为严重的生态问题之一,明晰区域内不同沙化阶段植物群落与表土环境因子的关系,有助于为玛曲高寒草甸沙漠化的监测与防治提供科学参考。鉴于此,研究应用方差分析与典范对应分析,厘清了潜在、轻度、中度、重度和极重度沙化阶段植物的组成格局与变化规律,并对其与表土环境因子的关系进行了分析。结果表明:(1)伴随沙漠化的发展,表土水分与电导率呈逐步降低的趋势,下降幅度显著(P<0.05);温度呈先降低后增加的变化规律,其中轻度沙化阶段最低,为24.32℃,极重度阶段最高,达30.79℃;(2)伴随沙漠化的发展,植物的盖度、多度依次降低,下降幅度显著(P<0.05);物种丰富度、Shannon-Wiener指数、Simpson指数与Pielou指数的变化趋势相近,呈潜在至轻度阶段上升,之后逐步下降的规律;(3) 典范对应分析(CCA)表明,表土水分和电导率对群落组成的影响程度达到极显著水平(P<0.01) 。潜在与轻度沙化阶段,CCA前两轴的方差解释率分别是71.91%和55.25%,表土环境因子能够较好的描述植物群落特征与多样性水平的变化规律;中度、重度和极重度沙化阶段,CCA前两轴的方差解释率不足40%,表土环境因子难以有效表征植物群落特征,预示放牧等人类活动在这些演替阶段的影响更为突出。
英文摘要	Desertification is one of the most serious ecological problems in the Maqu alpine meadow.It is helpful to provide scientific reference for monitoring and prevention of desertification by understanding the dynamic changes of plant communities and soil surface environmental factors in different desertification stages in this area.Our study clarified the distribution pattern and vegetation changes in potential,slight,moderate,severe and extremely severe desertification stages by sample survey method and the application of variance analysis and canonical correspondence analysis.Furthermore,their relationships with the soil surface environmental factors were explored.The results showed that:(1) with the development of desertification,the soil moisture and conductivity of the soil surface decreased significantly (P <0.05).The soil temperature decreased firstly and then increased,the lowest was in the slight desertification stage (24.32 ℃) while the highest was in the severity stage (30.79 ℃).(2) The coverage and abundance of vegetation decreased significantly with the development of desertification (P<0.05).All the species richness,Shannon-Wiener index,Simpson index and Pielou index showed dynamic increases from potential to slight phase of desertification and then gradually decreased along moderate,severe,and extremely severe desertification stages.(3) The Canonical Correspondence Analysis (CCA) showed that soil surface moisture,temperature and conductivity could explain 31.10% of species composition in communities,and the influence of soil surface water and conductivity on community composition reached extremely significant level (P <0.01).In the potential and slight desertification stages,the variance interpretation rates of the first two axes of the CCA were 71.91% and 55.25%,respectively.The soil surface environmental factors could better describe the changes of plant community characteristics and diversity levels.In the moderate,severe and extremely severe desertification stages,the variance interpretation rate of the first two axes of CCA was less than 40%.The soil surface environmental factors were difficult to effectively reflect the plant community characteristics,indicated that the impact of grazing and other human activities in the middle and late stage of the sanding succession was more prominent.
中文关键词	沙化阶段 ; 高寒草甸 ; 表土环境因子 ; 植物群落特征 ; 典范对应分析
英文关键词	desertification stage alpine meadow soil surface environmental factor plant community characteristics canonical correspondence analysis
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6829301
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353770
作者单位	王新源, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院;;中国科学院西北生态环境资源研究院, ;;;;, 兰州;;兰州;;兰州, ;;;; 730020;;730020;;730000. 马仲武, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院, ;;, 兰州;;兰州, ;; 730020;;730020. 王小军, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院, ;;, 兰州;;兰州, ;; 730020;;730020. 陈萍, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院, ;;, 兰州;;兰州, ;; 730020;;730020. 张琴, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院, ;;, 兰州;;兰州, ;; 730020;;730020. 程小云, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院, ;;, 兰州;;兰州, ;; 730020;;730020. 刘健, 甘肃省生态环境监测监督管理局;;甘肃省林业调查规划院, ;;, 兰州;;兰州, ;; 730020;;730020. 唐霞, 中国科学院西北生态环境资源研究院, 兰州, 甘肃 730000, 中国. 连杰, 中国科学院西北生态环境资源研究院, 兰州, 甘肃 730000, 中国. 曲浩, 中国科学院西北生态环境资源研究院, 中国科学院乌拉特荒漠草原研究站, 兰州, 甘肃 730000, 中国.
推荐引用方式 GB/T 7714	王新源,马仲武,王小军,等. 不同沙化阶段高寒草甸植物群落与表土环境因子的关系[J]. 中国科学院西北生态环境资源研究院,2020,40(19).
APA	王新源.,马仲武.,王小军.,陈萍.,唐霞.,...&曲浩.(2020).不同沙化阶段高寒草甸植物群落与表土环境因子的关系.生态学报,40(19).
MLA	王新源,et al."不同沙化阶段高寒草甸植物群落与表土环境因子的关系".生态学报 40.19(2020).