基于GIS的浙江海岛木本植物物种丰富度预测  

Prediction of Woody Plant Species Richness of Zhejiang Iland Based on GIS

作　　者：李晓明[1] 吕林玲 胡喜生[3] 曹荣青 吴承祯[4] 侯纯扬 LI Xiaoming;LYU Linling;HU Xisheng;CAO Rongqing;WU Chengzhen;HOU Chunyang(State Oceanic Administration,Beijing 100860,China;Island Research Center,Ministry of Natural Resources,Pingtan 350400,Fujian,China;Fujian Agriculture and Forestry University,Fuzhou 350002,China;Department of Ecology and Resource Engineering,Wuyi University,Wuyishan 354300,Fujian,China)

机构地区：[1]国家海洋局,北京100860 [2]自然资源部海岛研究中心,福建平潭350400 [3]福建农林大学,福州350002 [4]武夷学院生态与资源工程系,福建武夷山354300

出　　处：《四川农业大学学报》2019年第4期511-516,共6页Journal of Sichuan Agricultural University

基　　金：国家海洋局海岛物种资源控制因子调查评估与区划示范项目(G.2200204.180306);国家自然科学基金项目(31400533)

摘　　要：【目的】浙江省是中国拥有海岛最多的省份,摸清海岛植物丰富度为海岛生态系统开发、利用和保护提供科学依据。【方法】基于71个典型海岛294个10 m×10 m的样地植被调查数据,采用空间插值和回归模型相结合的方法对海岛木本植物物种丰富度进行预测。【结果】海岛各样点木本植物物种丰富度介于1~0种/100 m^2之间,其中乔木层植物物种数介于1~30种/100 m^2之间,灌木层植物物种数介于1~70种/100 m^2之间,海岛各样点的木本植物物种数丰富度均随着离陆地距离的增加而减少。以各样点的木本植物累计物种数为自变量,以实际木本物种数为因变量建立回归模型,结果表明幂函数回归模型的拟合效果最佳,相关系数R2高达0.988,预测精度大于83%。【结论】普陀岛、龙门岛、南关岛等12个海岛的木本植物物种数大于200种,佛渡岛、岱山岛、洛伽山岛等27个海岛的木本植物物种数介于100~200种之间,而九洞门岛、南策岛、壳塘山岛等11个海岛的木本植物物种数介于40~100种之间。【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 m^2,the number of plant species in the arbor layer was between 1-30 species per 100 m^2,and the number of plant species in the shrub layer ranged from 1-70 species per 100 m^2.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 indepen-dent 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.

关 键 词：浙江省 海岛 物种丰富度 空间插值 

分 类 号：Q948[生物学—植物学]