Analysis on Community Composition and Structure of Quercus phillyraeoides in Jiangshi Nature Reserve of Fujian Province

As a type of evergreen sclerophyllous forest that is widely distributed in the eastern part of China, Quercus phillyraeoides community is of important value in scientific researches on flora, plant ecology and paleobotany.The community composition and structure of Q.phillyraeoides in Jiangshi Natural Reserve of Fujian Province was investigated by means of phytocoenology.The results showed: （1) 60 species, belonging to 42 genera, 26 families were identified in this community; 600 m2 was determined as the minimum sampling area for the community by the pattern of speciesarea curve, the number of species increment tended to slow down when the sampling area reached 2000 m2It was indicated by the analyses of speciesabundance pattern and Raunkiaer frequency law that the community was characterized by dominant species and many species with low frequency or abundance.（2) Although the community structure seemed to be simple, it could be divided into four stories, i.e., first, the arbor tree story with dominant species of Q.phillyraeoides, Symplocos stellaris, Cyclobalanopsis glauca, Juniperus formosana, and Quercus oxyphylla whose important values (IV) were 3470%, 789%, 434%, 387% and 310% respectively; second, the shrub story that was dominated by Diplospora dubia, Serissa japonica, Loropetalum chinense and Rhododendron dahuriocen whose IV were 409%, 399%, 384% and 287% respectively; third, there were few species in the herb story and interstories.（3) Although the sizeclass structure of Quercus phillyraeoides population showed normal distribution, it could maintain the dominant position in the community depending on the middleclass individuals as regeneration resource; additionally, the Q.phillyraeoides forest was still the climax community because of its special environment.The distribution of Q.phillyraeoides communities had a special significance for this region, and it was very important for soil and water conservation and vegetation restoration in Danxia landform area to protect and make good use of Q.phillyraeoides forest.