梭梭群落物种多样性与土壤理化性质的相关性研究  

Species Diversity of Haloxylon ammodendron Community and Its Correlation with Soil Characteristics

作　　者：徐磊[1,2] 廖帆 严成[1] 杨更强 

机构地区：[1]中国科学院新疆生态与地理研究所,中国科学院干旱区生物地理与生物资源重点实验室,新疆乌鲁木齐830011 [2]中国科学院大学,北京100049 [3]克拉玛依市绿化委员会,新疆克拉玛依834000

出　　处：《干旱区研究》2015年第5期875-881,共7页Arid Zone Research

基　　金：克拉玛依市科技计划项目(SK-2012-15)

摘　　要：选择4个物种多样性测度指标,在对克拉玛依市区外围4处样地梭梭群落多样性调查的基础上,分析土壤理化性质。结果表明：1 Shannon-Wiener多样性指数、Gleason丰富度指数、Pielou均匀度指数从山麓前缘到沙漠区先增大后减小,Simpson优势度先减小后增大;2不同区域不同土壤深度总盐、K＋、Cl-、SO2-4、Ca2＋含量存在差异,酸碱度变化范围在7-9;总盐含量的变化趋势为：黏土区〉冲积扇砾漠区〉洪积扇砾漠区〉沙漠区;其他离子表现出与总盐相同的趋势;3根据土壤分层理化性质与多样性的逐步回归分析表明,土壤指标在不同深度分别与群落多样性测度指标具有一定的相关性,酸碱度、总盐、Cl-、SO2-4、Ca2＋、K＋对4个物种多样性指数影响较大,HCO-3影响较小。Species diversity is a measure of community structure and functional complexity,and the species is a basic unit of the species diversity and the most important measure of species diversity. In the natural community species composition and the structure is the result of the long-term adaptation to the environment. Haloxylon ammodendron community is a major plant community at periphery area of Karamay,species diversity level is not high and the community structure is single. Choosing four sample areas,we had investigated Haloxylon ammodendron community species diversity,and analyzed the correlation between four species diversity index with soil characteristics at periphery area of Karamay. The result as follows： 1 Shannon-Wiener diversity index,Gleason richness index,Pielou evenness index first increases then decreases from piedmont frontier to the desert,Simpson dominance index first decreases then increases; 2 There are differences in soil layers p H value,soil total salt content,and ion content of K＋,Cl-,SO2-4,Ca2 ＋at different sample areas. Variation of p H value was small,soil total salt content shows clay alluvial fan gravel desert pluvial gravel desert desert. Other salt ions show that the same trend with soil total salt content. 3 According to the result of multiple liner regression between diversity index and soil characteristics at different layers,soil index had certain correlation with diversity index at different layers,p H value,soil total salt content and ion content of K＋,Cl-,SO2-4,Ca2 ＋had main influence on the diversity index,while ion of HCO-3is lower. The study result could provide the theory basis for urban peripheral damaged vegetation restoration and biodiversity protection in Karamay City.

关 键 词：梭梭群落 物种多样性 土壤理化性质 相关性 克拉玛依 新疆 

分 类 号：S714.2[农业科学—林学]