Species Composition and Community Structure of Evergreen Deciduous Broad-Leaved Mixed Forest Plot in Bancang Provincial Nature Reserve,Anhui Province
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目的:探究安徽潜山板仓省级自然保护区常绿落叶阔叶混交林物种组成和群落结构.方法:按照CTFS的建设标准,在安徽潜山板仓省级自然保护区建立1 hm2的森林监测固定样地.对样地内所有胸径(DBH)≥1 cm 的木本植物进行调查,并从群落物种组成、区系特征、重要值、群落垂直结构和径级特征等进行分析研究.结果:该固定样地内DBH≥1 cm 的木本植物共有3 572 株,隶属于34科66属98种;其中樟科、豆科、蔷薇科、壳斗科等有较大优势.从属的水平上看,温带区系成分占总属数的71.43%,热带区系成分占25.40%,区系具有过渡性,且温带成分明显.样地稀有种17种,占总物种数的17.35%.重要值≥1.00%的物种共有22个,重要值最大的为毛柄连蕊茶13.05%、其次为豹皮樟11.04%和山胡椒7.13%.样地内所有植株平均胸径为4.60 cm,平均高度为4.3 m,群落径级分布呈"J"型,表明群落结构总体稳定和健康生长状态.结论:样地内木本植株数量较多,物种丰富,具有天然次生林典型特征.区系成分复杂,具有明显的过渡特征.植被由落叶阔叶混交林向常绿阔叶林演替.
Objective:To explore the species composition and community structure of evergreen and deciduous broad-leaved mixed forest in Bancang Provincial Nature Reserve,Anhui Province.Meth-ods:According to the construction standards of CTFS(Center for Tropical Forest Science),a 1 hm2 forest fixed observation plot was established in Bancang Provincial Nature Reserve.All free-standing woody plants in the fixed plot with a diameter at breast height(DBH)≥1 cm were surveyed and identi-fied,and their species composition,floristic features,community structure and diameter class charac-teristics were analyzed and studied.Results:There were 3 572 woody plants with DBH≥1 cm in the fixed plot,belonging to 98 species,66 genera,and 34 families;among them,Lauraceae,Legumino-sae,Rosaceae,and Fagaceae had greater advantages.From the perspective of genera,the temperate flora accounted for 71.43%of the total number of genera,and the tropical flora accounted for 25.40%.The flora had transitional characteristics,and the temperate components were obvious.There were 17 rare species in the plot,accounting for 17.35%of the total species.There were 22 species with an im-portant value≥1.00%,with the highest being Camellia fraterna Hance(13.05%),followed by Litsea coreana var.sinensis(C.K.Allen)Yen C.Yang&P.H.Huang(11.04%)and Lindera glauca(Siebold&Zucc.)Blume(7.13%).The average DBH of all plants in the plot was 4.60 cm,and the average height was 4.3 m.The community diameter distribution was"J"shaped,indicating that the community structure was generally stable and healthy.Conclusion:In the sampled plot,the number of trees was high and the species composition was rich.The sample plot contained a large number of woody plants with rich species diversity,exhibiting typical characteristics of natural secondary forests.The floristic composition was complex and displayed distinct transitional features.The vegetation had undergone succession from deciduous broad-leaved mixed forest to evergreen broad-leaved forest.
Eevergreen and deciduous broad-leaved mixed forestSpecies compositionFloristic featureBancang Provincial Nature ReserveAnhui Province
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