四川缙云山大头茶与森林优势种群间联结性研究

STUDIES ON THE INTERSPECIFIC ASSOCIATIONS BETWEEENGORDONIA AOUMINAIA AND THE DOMINANT POPULATIONS IN THE FOREST OF JINYUN MOUNTAIN, SICHUAN

基于２×２联列表，应用方差分析、Ｘ￣２统计检验、Ｏｏｎａｉ指数、Ｊａｃｃａｒｄ指数等系列技术，对四川缙云山大头茶（Ｇｏｒｄｏｎｉａｃｕｍｉｎａｔａ）与缙云山森林优势种群在演替系列群落中的联结性进行了研究．结果表明，种对间的联结性质和程度是随着群落演替的进展而发生变化的，这也正是生境条件优化和多种群相互作用，占据各自生态位的动态过程．只在常绿阔叶林中，大头荣与栲树、润楠间表现出极显著负联络；与白毛新木姜子、银木荷间存在极显著正联结，与小叶栲、虎皮楠间表现出显著正联结．

Based on 2×2 contingency table and with help of a series of techniques,i.e. variance analy-sis,X￣2-test,Ochai and Dice indices,the interspecific associations between Gordonia acuminata and thedominant species in the succession series in Mt.Jinyun of China are researched.The result shows thatthe nature and degree of interspecific association between pair species change along with the develop-ment of succession series of forest,which is the very dynamic process in which the environmental con-ditions develop and many populations act to each other and occupy their niches. Only in Evergreen broadleaved forest,the interspecific assciations between Gordonia ccuminata andCastanopsis fargesii and Machilus pingii are notably negative,those between Gordonia acuminata and Neolit-sea aurata var.glauca and Schima margatea are extremely notably positive and those between Gordonia acumi-nata and Castanopsis carlesii var.spinulosa and Daphniphyllum glaucescens are notably positive.