Community Characteristics of Coniferous and Broad-leaved Mixed Forest in Jingning Dayanghu Provincial Wetlands Nature Reserve

In July 2018, a typical coniferous and broad-leaved mixed forest community was selected to establish a permanent sample plot with 100 m × 100 m in Jingning Dayanghu Provincial Wetlands Nature Reserve, Zhejiang province. Investigations were completed on species composition, DBH, etc. The results showed that there were 150 plant species belonging to 53 families and 97 genera. Pinus taiwanensis was constructive species with important value of 19%. Eurya hebeclados had the highest important value of 31.3%, and was the dominant species. Main associated species were Schima superba, Symplocos coreana, Photinia parvifolia and Photinia beauverdiana, etc. Family distribution type had tropical properties, but the genus one accounted for 57.1% of the total, showing obvious characteristics of temperate zone. Diameter class distribution of woody plant community showed a typical inverse "J" in the plot with good regeneration. There was few number of small diameter P. taiwanensis, resulting its poor natural regeneration. The vertical structure of the community was complex and the stratification was not obvious. Dominant tree species were distributed in different arbor sublayers. The shrub layer was dense and rich in species. Herb layer was sparse. The dominant species and the main companion species in the arbor layer of the plot had different habitat preference and aggregation distribution.