秦岭西段天然落叶阔叶林乔木种间关联性  

Interspecific associations among tree species in natural deciduous broadleaved forests in western Qinling,Northwest China

作　　者：杨海裕 张宋智 刘小林 裴会明 蔺岩雄 

机构地区：[1]甘肃省小陇山林业科学研究所,甘肃天水741022 [2]甘肃小陇山森林生态系统定位研究站,甘肃天水741022

出　　处：《生态学杂志》2012年第10期2513-2520,共8页Chinese Journal of Ecology

基　　金：林业公益性行业科研专项(200804022);甘肃省科技支撑计划项目(1104FKCE070)资助

摘　　要：为研究小陇山林区天然落叶阔叶林种群的自然生长状况和群落结构特征,解决森林经营中树种选择的问题,2009年6—9月,采用典型抽样的方法,对以锐齿栎为主的落叶阔叶林进行了调查。在小样方(10m×10m)尺度上,调查了乔木树种的分布情况,计算了其重要值;用2×2列联表,以方差比率VR、Jaccard指数、χ2检验,对37个树种666个种对间的关联性进行定量研究。结果表明:群落中锐齿栎重要值最大,其他均为伴生树种;37个树种总体呈现显著的正关联,且总体达到显著水平;χ2检验结果有7个种对呈极显著关联性,占总种对数的1.05%,19个种对呈显著关联性,占总种对数的2.85%;结合AC值,5个种对呈极显著正关联,2个种对呈极显著负关联;640个种对无关联或关联程度未达显著水平,占总种对数的96.10%。群落处于较为稳定的次生演替阶段。研究结果对天然次生林经营及造林树种的选择具有指导意义。In order to understand the plant population growth status and community structure characteristics of natural deciduous broadleaved forests in Xiaolongshan region of western Qinling and to solve the selection issue of tree species in forest management, an investigation by the method of typical sampling was conducted on the deciduous broadleaved forest dominated by Quercus aliena var. acuteserrata from June to September 2009. The distributions of the tree species in this forest were investigated on small quadrat scale （10 m×10 m）, the importance values of the tree species were calculated, and the interspecific associations among the 666 speciespairs of 37 tree species were quantitatively studied by 2×2 contingency table, variance ratio VR, Jaccard index, and χ2 test. In the forest studied, Q. aliena var. acuteserrata had the highest importance value, while the others were the associated tree species. Overall, the 37 tree species showed positive associations, and the associations reached significant level. The χ2 test showed there were 7 tree species pairs （1.05% of the total） presenting very significant association, 19 tree species pairs （2.85% of the total） presenting significant association, and 640 pairs （96.10% of the total） presenting no or insignificant association. In combining with the AC value, there were 5 pairs showing significant positive association, and 2 pairs showing significant negative association. The community was in a relatively stable stage of secondary succession. This study could provide guidance for the management of natural secondary forest and the selection of afforestation species.

关 键 词：小陇山 天然次生林 种群生态学 种间关联 Jaccard指数 χ2检验 

分 类 号：Q948[生物学—植物学]