欢迎来到天天文库
浏览记录
ID:56000200
大小:476.81 KB
页数:7页
时间:2020-06-19
《南岭山地森林群落冠层结构与立木多度的关系.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第34卷第5期中南林业科技大学学报Vb1.34NO.52014年5月JournalofCentralSouthUniversityofForestry&TechnologyMav2014南岭山地森林群落冠层结构与立木多度的关系敬小丽,杜伟静,张璐,苏志尧(华南农业大学林学院,广东广州510642)摘要:林冠是森林与外部环境相互作用最直接与最活跃的界面层,影响着森林的物理环境和生物环境。采用半球面摄影技术(HemisphericalPhotography)、典范对应分析(CanonicalCorrespondenceAnalysis,CCA)和Kruska1.Wallis分析定量研究了森林群落
2、冠层结构与立木分布及多度的关系。结果表明:(1)基于10000m调查样地,南岭山地森林群落共有立木47科81属143种,枯立木多来源于林冠上层大树;(2)CCA排序结果显示,冠层结构各参数与立木分布均有一定相关性,叶面积指数、林冠开度与立木分布的关系尤为密切;(3)立木多度与活立木多度在林下散射光分组变量间差异显著(P<0.05),枯立木多度在林冠开度分组变量间的差异性显著(P<0.05),立木多度随林下直射光增强而减少。叶面积指数和林冠开度通过影响林下光照条件进而影响立木,尤其是枯立木的形成和多度。关键词:山地森林群落;冠层结构;立木多度;活立木;枯立木;叶面积指数:林冠开度中图分类号:$
3、718.5文献标志码:A文章编号:1673.923X(2014)05—0059.07RelationshipbetweencanopystructurefactorsandabundanceofstandingtreesinNanlingmountainforestcommunitiesJINGXiao·li,DUWei-jing,ZHANGLu,SUZhi—yao(CollegeofForestry,SouthChinaAgriculturalUniversity,Guangzhou510642,Guangdong,China)Abstract:Canopyisthemostdirecta
4、ndactiveinterfacelayerbetweenforestandexternalenvironment,whichaffectsphysicalandbioticenvironmentofforest.ByusingHemisphericalPhotography,CanonicalCorrespondenceAnalysis(CCA)andKruskal—Wallismethods,therelationsamongthedistributionandabundanceofstandingtreesandforestcanopystructurewerequantitative
5、lystudied.Theresultsindicatedthat(1)Therewere47families,81generaand143speciesbasedonthe10000msamplinginvestigationsandmostofthedeadstandingfleesderivedfromover-storybigold-agedtrees;(2)theresultsofCCAordinationindicatedthatallofthecanopystructureparametershadacertaincorrelationwithdistributionofsta
6、ndingflees,andtheleafareaindex(LAI)andcanopyopenness(CO)hadasignificantcorrelationwithdistributionofstandingtrees;(3)TheabundanceofstandingtreesandabundanceoflivingstandingtreeshadasignificantdiferenceamongTransmittedDiffusedLight(TDif)groups<0.05)andabundanceofsnagshadasignificantdiferenceamongcan
7、opyopennessgroups(尸<0.05),besides,theabundanceofstandingtreesdecreasedwiththeenhancementofTransmittedDirectLight(TDir).Moreover,LAIandCOafectedunder-storylightconditions,therebytothestumpage,especiallythefo
此文档下载收益归作者所有