摘要:
采用方差比率法(VR)、X2检验、无中心指数等方法对缙云卫矛(Euonymus chloranthoides)3个群落进行了群落物种间关联性分析。结果表明,3个群落内物种的总体关联均表现为不显著的负关联性;北温泉群落6个主要物种的15个种对中有7个正关联,8个负关联;鸡公山群落8个主要物种的28个种对中有11个正关联,16个负关联,1个相对独立的关系;东温泉群落4个主要物种的6个种对中2个正关联,4个负关联。这反映了整个群落处于不稳定状态,这与生境片断化是密切相关的。种对间的关联性表明缙云卫矛与慈竹间显示出较强的正关联性,这表明缙云卫矛的生长需要慈竹为其提供适宜的生境。
Abstract:
Interspecific association of the dominant species in three communities with the endangered plant Euonymus chloranthoides,at Beiwenquan site,Jigongshan site and Dongwenquan site,respectively,was analyzed using variance ratio,X2-test and noncentred indices.Results showed that overall interspecific association had a non-significant negative relationship for the three communities.Of fifteen species-pairs for six species at Beiwenquan site,seven species-pairs showed positive association and eight species-pairs showed negative association.Of twenty-eight species-pairs for eight species at Jigongshan site,eleven species-pairs showed positive association,sixteen showed negative association,and one held relatively independent.Of six species-pairs for four species at Dongwenquan site,two species-pairs showed positive association and four showed negative association.Interspecific association indicated that these communities were not steady,which was closely related to habitat fragmentation.High positive association between E.chloranthoides and Sinoalamus affinis indicated that it was necessary to provide suitable habitat for E.chloranthoides by pre-construction of S.affinis population.
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