摘要:
采用定量分析方法,对松材线虫不同受害阶段的马尾松群落中13个主要种群进行了生态位研究.以群落组成类型:①马尾松+榿木+白栎,②黑松+马尾松+冬青+柃木,③马尾松+冬青+栀子+短柄枹,④马尾松+篌竹+ 榿 木,⑤木荷+马尾松+苦槠+短柄枹,⑥栓皮栎+冬青+杜虹花,及所建立的综合资源梯度指数(10~70)综合为一维资源位,调查6个资源位,定量测定不同受害阶段马尾松群落主要种群生态位宽度、生态位相似比例、生态位重叠,并阐述了各种群生态位的生态学意义.结果表明:由于松材线虫的入侵,加之随后的人为伐除马尾松受害木,马尾松林正朝着阔叶林和针阔混交林两个方向演替.
Abstract:
The niche characteristics of 13 main tree populations among Masson pine community at different damage phases were analyzed by a quantitative method.The niche breadth,niche proportional similarity and niche overlap of the main populations in Masson pine community in different damage phases were measured by taking following community composition types:1) Pinus massoniana + Loropetalum chinense +Quercus fabri,2) P.thunbergii + P.massoniana + Ilex purpurea+ Eurya japonica,3) P.massoniana + I.purpurea+Gardenia jasminoides+Q.glandulifera var. brevipetiolata,4) P.massoniana +Phyllostachys nidularia + L.chinense,5) Schima superba +P.massoniana + Castanopsis sclerophylla + Q.glandulifera var.brevipetiolata,6) Q.variabilis + I.purpurea +Callicarpa formosana,and the integrated index of resource gradient(10(-)70) established as one dimension resource stated with 6 investigating plots.Also,the ecological significance of the results were demonstrated.It showed that with the invasion of Bursaphelenchus xylophilus and the following disturbing measures taken by humans of cutting down the infected plants,the succession Masson pine forests was turning to two directions-broad leaved forests and Mixed forests of Masson pine & broadleaf tree.
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