机构地区: 汕头市林业科学研究所
出 处: 《西南师范大学学报(自然科学版)》 2013年第3期87-93,共7页
摘 要: 以潮阳西环山森林公园内的台湾相思Acacia confusa人工次生林群落为研究对象,探讨该区不同人工次生林群落林下木本植物的分布影响.采用典型取样法沿着海拔梯度变化方向分别设置上坡、中坡、下坡样地,共12个20m×20m的调查样方,记录到林下木本植物26种,隶属于15科、23属.多响应置换过程(MRPP)分析表明,台湾相思人工次生林林下木本植物组成在不同坡位、不同土壤含水量条件下存在显著性差异(分别为A=0.468 7,0.132 5,P=0.000 8,0.042 3).指示种分析(ISA)较好地检验出不同立地因子下具有显著指示值(Ⅳ≥60)的指示种.双向聚类分析较好地揭示了林下木本植物在样地中因生境因子影响而体现在空间分布上的差异,并划分出3个生态组.该研究揭示了台湾相思人工次生林林下木本植物对不同立地因子的响应,对于生物多样性保护和植被恢复具有重要的理论意义和实践价值. With Acacia confusa secondary forests as the research object in Chao Yang Xi Huan Shan Forest Park,the paper deals with the exploration of the effect of different community on the distribution of understory wood plants.12 plots,each 400m2,have been set up along the altitude gradient in typical sampling method.26 understory wood plants,which belong to 15 families and 23 genera,have been recorded.The result of multi-response permutation procedures(MRPP)shows that,there are significant differences in the distribution of understory wood plants in different site factors(A=0.468 7,0.132 5,P=0.000 8,0.042 3,respectively).Furthermore,Indicator Species Analysis(ISA) identifies indicator species with a significant indicator value≥60 in different site factors.Two-way Cluster Analysis reveals the difference in spatial distribution of understory wood plants,and divided 3 ecological groups.This study has elaborated the response of understory wood plants in different site factors in Acacia confusa secondary forests.This has important theoretical significance and practical value for biodiversity conservation and vegetation restoration.
关 键 词: 台湾相思 立地因子 多响应置换过程分析 指示种分析 双向聚类分析
领 域: [生物学]