关键词: 浙江省, 海岛, 物种丰富度, 空间插值

Abstract: 【Objective】 Zhejiang Province has the largest number of islands in China. It is a prerequisite for the development, utilization and restoration of islands to find out the richness of island vegetation. 【Method】 Based on the survey data of 294 10 m×10 m plots of typical islands, this study used spatial interpolation and regression models to predict the species richness of island woody plants. 【Result】 The results showed that the species richness of woody plants in the island ranged from 1-90 species per 100 m², the number of plant species in the arbor layer was between 1-30 species per 100 m², and the number of plant species in the shrub layer ranged from 1-70 species per 100 m². The plant species richness of various islands decreased with the increase of the distance from the mainland. The regression model was established by taking the cumulative species number of woody plants as the independent variable and the actual number of woody plant species as the dependent variable. The results showed that the power function regression model fitted best, with R² being higher than 0.988, and the prediction accuracy being greater than 83%. 【Conclusion】 The prediction results showed that the number of woody plant species in 12 islands such as Putuo Island, Longmen Island and Nanguan Island is more than 200, and the species number of woody plant in 27 islands such as Fodu Island, Laoshan Island and Luojiashan Island is between 100 and 200, and the species number of woody plant in 11 islands such as Jiudongmen Island, Nance Island and Qiaotangshan Island is between 40 and 100.

Key words: Zhejiang Province, island, species richness, spatial interpolation