Analysis of woody species diversity of public green space in Xianlin college town, Nanjing city.
Purpose: Public green space of urban plays a significant role in improving environment, protecting environment and decorating environment; it has an irreplaceable status on improvement of living environment and creation of livable city. To understand the species composition and diversity of public green space of new satellite city, a case study of Xianlin college town in Nanjing metropolitan, the objective of this paper was to provide scientific reference of construction of green space for the management. Method: 30 plots (each 20 m ×20 m) were surveyed randomly by the method of stratified sampling. The data was analyzed by importance value, species abundance, diversity indices etc. Results: (1) There were 41 species belonging to 27 families and 36 genera; Rosaceae, Oleaceae and Magnoliaceae contained more species than other families. Generally, alien species were more than native one, particularly arbor layer. (2) Based on the importance value, Cinnamomum camphora, Cerasus yedoensis and Ginkgo biloba were the dominant species in arbor; in shrub layer, Euonymus japonicus var. aureomarginata, Photinia serratifolia and Pittosporum tobira were top three species. Their species abundance were far more than the others. (3) Structure of diameter at breast height (DBH) displayed that more individuals assemble in the height class of 3-6 m and 0.4-1 m in arbor layer and shrub layer respectively. (5) Compared to the other cities, species diversity was lower in studied area. Conclusion: We can draw conclusions that improvement of community structure, increasement of species diversity and creation of special landscape should be paid more attention on the public green space of Xianlin college town.