平潭沿海防护林生物多样性研究

Biodiversity of Coastal Protection Forest in Pingtan Island

通过对平潭沿海防护林基干林带按垂直距离海岸线的远近划分的基干林带后沿片林、基干林带后沿林带、基干林带前沿林带和基干林带前沿等4个典型类型林带生物多样性指标的分析,结果表明:4个典型类型样地组的物种数分别为15、10、11和9个;平潭沿海防护林人工群落演替过程中,乔木层、灌木层、草本层均受人工调控的影响,物种丰富度、多样性以乔木层最低,灌木层次之,草本层最高;多样性Shannon’指数与均匀度Hurlbert’指数均能较好反映人工群落的物种多样性。

Coastal backbone forest strips in Pingtan Island were divided into four typical types according to vertical distance from the coastline,namely:patch forest behind the coastal backbone forest strips,shelterbelt behind the coastal backbone forest strips,frontier shelterbelt of the coastal backbone forest,frontier backbone forest strips;biodiversity indicators of forest for above-mentioned four typical shelterbelts were analyzed.Result shows that num-ber of species of four typical plots groups are respectively 15,10,11 & 9.In the process of artificial community suc-cession for Pingtan coastal shelterbelt,the tree layer,shrub layer,herb layer are affected by artificial regulation;from the aspect of species richness & diversity,tree layer is the lowest,followed by shrubs,herbaceous layer is the high-est.Shannon’index of diversity and Hurlbert’index of evenness can reflect optimally the diversity of species for arti-ficial communities.