基于SEM解析科尔沁沙地生境条件对植物群落的直接和间接影响
|
摘要
由于生态系统的复杂多样性,量化生境条件对植物群落形成及演替的影响是生态学研究中的难点。本文以位于西辽河流域东南位置的科尔沁沙地为研究对象,收集55个湿草甸斑块样品和278个沙丘斑块样品,在湿草甸-沙丘组合斑块和单一的沙丘斑块两种不同研究尺度下,利用混合型结构方程构建了能反映生境条件对植被群落直接和间接影响关系的模型,并采用偏最小二乘法对结构方程进行分析。结果表明:在湿草甸-沙丘组合斑块中,对于显著影响植被群落的直接因素,影响效果由大到小依次是土壤结构性能、土壤含水量和地下水位埋深,路径系数分别为0.607、0.230和-0.224;在单一的沙丘斑块中,对于显著影响植被群落的直接因素,影响效果由大到小依次是土壤结构性能、土壤含水量和土壤有机质(SOM)含量,路径系数分别为0.399、0.224和0.206;对比两种尺度的模拟结果可看出,当地下水位埋深对植物群落的直接效应显著时,会使SOM含量对植物群的直接影响效应变得不显著,但仍然可以通过影响土壤结构间接影响植物群落;坡度和高程对土壤质量的直接影响效应在两种尺度下是相反的,坡向的影响效果不显著;通过在结构方程模型中构建一个区域植被群落格局的形成型潜变量可以推断该区域植被演替的动态过程。
Due to the complexity and diversity of ecosystems,it is difficult to quantify the impacts of habitat conditions on the formation and succession of plant community.Here,we collected samples from 55 patches of wet meadow and from 278 patches of sand dune from Horqin Sandy Land located in the southeast of the West Liaohe River Basin.The relationships between plant communities and habitat conditions at different scales(wet meadow-sand combination patches and individual sand dune patches) were evaluated by a mixed structural equation model,with the structural equation being analyzed by the partial least square method.In the wet meadowsand combination patches,the direct factors with significant effects on plant communities were soil structure,soil water content,and groundwater depth sorted by effect size,with the path coefficients of 0.607,0.230,and-0.224,respectively.In the individual sand dune patches,the direct factors with significant effects on plant communities were soil structure,soil water content,and soil organic matter(SOM) content sorted by effect size,with the path coefficients of 0.399,0.224,and 0.206,respectively.When the direct effect of groundwater depth on plant community was significant,the direct effect of SOM content on plant community was insignificant,but with indirect effects on plant community indirectly by affecting soil structure.The direct effects of slope and elevation on soil quality were opposite at both scales,and the effect of slope direction was not significant.By constructing a latent variable of vegetation pattern in the structural equation model,we can infer the dynamics of community succession in the study area.
Due to the complexity and diversity of ecosystems,it is difficult to quantify the impacts of habitat conditions on the formation and succession of plant community.Here,we collected samples from 55 patches of wet meadow and from 278 patches of sand dune from Horqin Sandy Land located in the southeast of the West Liaohe River Basin.The relationships between plant communities and habitat conditions at different scales(wet meadow-sand combination patches and individual sand dune patches) were evaluated by a mixed structural equation model,with the structural equation being analyzed by the partial least square method.In the wet meadowsand combination patches,the direct factors with significant effects on plant communities were soil structure,soil water content,and groundwater depth sorted by effect size,with the path coefficients of 0.607,0.230,and-0.224,respectively.In the individual sand dune patches,the direct factors with significant effects on plant communities were soil structure,soil water content,and soil organic matter(SOM) content sorted by effect size,with the path coefficients of 0.399,0.224,and 0.206,respectively.When the direct effect of groundwater depth on plant community was significant,the direct effect of SOM content on plant community was insignificant,but with indirect effects on plant community indirectly by affecting soil structure.The direct effects of slope and elevation on soil quality were opposite at both scales,and the effect of slope direction was not significant.By constructing a latent variable of vegetation pattern in the structural equation model,we can infer the dynamics of community succession in the study area.
引文
曹文梅,刘小燕,王冠丽,等.2016.科尔沁沙地自然植被与生境因子的MRT分类及DCCA分析.生态学杂志,36(2):318-327.
黄兴召,许嵩华,许俊,等.2017.利用结构方程解析杉木林生产力与环境因子及林分因子的关系.生态学报,37(7):2274-2281.
邵立业,董光荣,陆福根.1988.共和盆地草原沙漠化的正、逆过程与植被演替规律.中国沙漠,8(1):33-43.
王海燕.2013.科尔沁沙地坨甸交错区土壤物化特性的空间变异规律研究(硕士学位论文).呼和浩特:内蒙古农业大学.
王酉石,储诚进.2011.结构方程模型及其在生态学中的应用.植物生态学报,35(3):337-344.
燕红.2015.泥炭沼泽湿地植被演替规律及植物多样性研究(博士学位论文).长春:东北师范大学.
赵丽娅,赵哈林.2000.我国沙漠化过程中的植被演替研究概述.中国沙漠,20(S1):8-15.
周瑞莲,赵哈林,王海鸥.1999.科尔沁沙地植被演替的抗逆性特征.中国沙漠,19(S1):2-7.
周欣,左小安,赵学勇,等.2015.科尔沁沙地植物群落分布与土壤特性关系的DCA、CCA及DCCA分析.生态学杂志,34(4):947-954.
Alamusa,Yang T,Cao J,Liu Y.2017.Soil moisture influences vegetation distribution patterns in sand dunes of the Horqin Sandy Land,Northeast China.Ecological Engineering,105:95-101.
Andrews SS,Karlen DL,Cambardella CA.2004.The Soil Management Assessment Framework.Soil Science Society of America Journal,68:1945-1962.
Arhonditsis GB,Stow CA,Steinberg LJ,et al.2006.Exploring ecological patterns with structural equation modelling and Bayesian analysis.Ecological Modelling,192:385-409.
Bollen KA.1989.Structural equations with latent variables.New York:John Wiley&Sons.
Burke IC,Lauenroth WK,Riggle R,et al.1999.Spatial variability of soil properties in the shortgrass steppe:The relative importance of topography,grazing,microsite,and plant species in controlling spatial patterns.Ecosystems,2:422-438.
Cenfetelli RT,Bassellier G.2009.Interpretation of formative measurement in information systems research.MIS Quarterly,33:689-707.
Chin,Newsted.1999.Srtuctural equation modeling analysis with samples using partial least squares//Hoyle RH.Statistical Strategies for Small Sample Research.Thousand Oaks,CA:Sage,307-342.
Gerrard AJ.1981.Soils and landforms.London:Allen&Unwin.
Krijnen W,Dijkstra T,Gill R.1998.Conditions for factor in determinacy in factor analysis.Psychometrika,63:359-367.
Liu Z,Li P,Yang J.2017.Soil moisture retrieval and spatiotemporal pattern analysis using Sentinel-1 data of Dahra,Senegal.Remote Sensing,9:1197.
Lutz HJ.1930.The vegetation of heart’s content:A virgin forest in Northwestern Pennsylvania.Ecology,11:1-29.
Fastie CL.1995.Causes and ecosystem consequences of multiple pathways of primary succession at Glacier Bay,Alaska.Ecology,76:1899-1916.
Fornell C,Bookstein F.1982.Two structural equation models:LISREL and PLS applied to consumer exit-voice theory.Journal of Marketing Research,19:440-452.
Pagliai M,Vignozzi N,Pellegrini S.2004.Soil structure and the effect of management practices.Soil&Tillage Research,79:131-143.
Ringle C,Wende S,Will A.2005.Smart PLS 2.0(Beta).Germany:University of Hamburg.
Saran S,Sterk G,Oevelen PJV,Dadhwal VK.2012.Potential of asar-envisat for estimating near surface soil moisture in a sloping terrain of a himalayan watershed.Journal of the Indian Society of Remote Sensing,40:541-550.
Soane BD.1990.The role of organic matter in soil compactibility:A review of some practical aspects.Soil&Tillage Research,16:179-201.
Urbach N,Ahlemann F.2010.Structural equation modelling in information systems research using Partial Least Squares.Journal of Information Technology Theory and Application,11:5-40.
Yonker CM,Schimel DS,Paroussis E,et al.1988.Patterns of organic carbon accumulation in a semiarid shortgrass steppe,Colorado.Soil Science Society of America Journal,52:478-483.
Zhang F,Zhang H,Evans MR,Huang T.2017.Vegetation patterns generated by a wind driven sand-vegetation system in arid and semi-arid areas.Ecological Complexity,31:21-33.
Zhang J,Zhao H,Zhang T,et al.2005.Community succession along a chronosequence of vegetation restoration on sand dunes in Horqin Sandy Land.Journal of Arid Environments,62:555-566.
Zuo X,Zhao X,Zhao H,et al.2012.Scale dependent effects of environmental factors on vegetation pattern and composition in Horqin Sandy Land,Northern China.Geoderma,173:1-9.
黄兴召,许嵩华,许俊,等.2017.利用结构方程解析杉木林生产力与环境因子及林分因子的关系.生态学报,37(7):2274-2281.
邵立业,董光荣,陆福根.1988.共和盆地草原沙漠化的正、逆过程与植被演替规律.中国沙漠,8(1):33-43.
王海燕.2013.科尔沁沙地坨甸交错区土壤物化特性的空间变异规律研究(硕士学位论文).呼和浩特:内蒙古农业大学.
王酉石,储诚进.2011.结构方程模型及其在生态学中的应用.植物生态学报,35(3):337-344.
燕红.2015.泥炭沼泽湿地植被演替规律及植物多样性研究(博士学位论文).长春:东北师范大学.
赵丽娅,赵哈林.2000.我国沙漠化过程中的植被演替研究概述.中国沙漠,20(S1):8-15.
周瑞莲,赵哈林,王海鸥.1999.科尔沁沙地植被演替的抗逆性特征.中国沙漠,19(S1):2-7.
周欣,左小安,赵学勇,等.2015.科尔沁沙地植物群落分布与土壤特性关系的DCA、CCA及DCCA分析.生态学杂志,34(4):947-954.
Alamusa,Yang T,Cao J,Liu Y.2017.Soil moisture influences vegetation distribution patterns in sand dunes of the Horqin Sandy Land,Northeast China.Ecological Engineering,105:95-101.
Andrews SS,Karlen DL,Cambardella CA.2004.The Soil Management Assessment Framework.Soil Science Society of America Journal,68:1945-1962.
Arhonditsis GB,Stow CA,Steinberg LJ,et al.2006.Exploring ecological patterns with structural equation modelling and Bayesian analysis.Ecological Modelling,192:385-409.
Bollen KA.1989.Structural equations with latent variables.New York:John Wiley&Sons.
Burke IC,Lauenroth WK,Riggle R,et al.1999.Spatial variability of soil properties in the shortgrass steppe:The relative importance of topography,grazing,microsite,and plant species in controlling spatial patterns.Ecosystems,2:422-438.
Cenfetelli RT,Bassellier G.2009.Interpretation of formative measurement in information systems research.MIS Quarterly,33:689-707.
Chin,Newsted.1999.Srtuctural equation modeling analysis with samples using partial least squares//Hoyle RH.Statistical Strategies for Small Sample Research.Thousand Oaks,CA:Sage,307-342.
Gerrard AJ.1981.Soils and landforms.London:Allen&Unwin.
Krijnen W,Dijkstra T,Gill R.1998.Conditions for factor in determinacy in factor analysis.Psychometrika,63:359-367.
Liu Z,Li P,Yang J.2017.Soil moisture retrieval and spatiotemporal pattern analysis using Sentinel-1 data of Dahra,Senegal.Remote Sensing,9:1197.
Lutz HJ.1930.The vegetation of heart’s content:A virgin forest in Northwestern Pennsylvania.Ecology,11:1-29.
Fastie CL.1995.Causes and ecosystem consequences of multiple pathways of primary succession at Glacier Bay,Alaska.Ecology,76:1899-1916.
Fornell C,Bookstein F.1982.Two structural equation models:LISREL and PLS applied to consumer exit-voice theory.Journal of Marketing Research,19:440-452.
Pagliai M,Vignozzi N,Pellegrini S.2004.Soil structure and the effect of management practices.Soil&Tillage Research,79:131-143.
Ringle C,Wende S,Will A.2005.Smart PLS 2.0(Beta).Germany:University of Hamburg.
Saran S,Sterk G,Oevelen PJV,Dadhwal VK.2012.Potential of asar-envisat for estimating near surface soil moisture in a sloping terrain of a himalayan watershed.Journal of the Indian Society of Remote Sensing,40:541-550.
Soane BD.1990.The role of organic matter in soil compactibility:A review of some practical aspects.Soil&Tillage Research,16:179-201.
Urbach N,Ahlemann F.2010.Structural equation modelling in information systems research using Partial Least Squares.Journal of Information Technology Theory and Application,11:5-40.
Yonker CM,Schimel DS,Paroussis E,et al.1988.Patterns of organic carbon accumulation in a semiarid shortgrass steppe,Colorado.Soil Science Society of America Journal,52:478-483.
Zhang F,Zhang H,Evans MR,Huang T.2017.Vegetation patterns generated by a wind driven sand-vegetation system in arid and semi-arid areas.Ecological Complexity,31:21-33.
Zhang J,Zhao H,Zhang T,et al.2005.Community succession along a chronosequence of vegetation restoration on sand dunes in Horqin Sandy Land.Journal of Arid Environments,62:555-566.
Zuo X,Zhao X,Zhao H,et al.2012.Scale dependent effects of environmental factors on vegetation pattern and composition in Horqin Sandy Land,Northern China.Geoderma,173:1-9.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |