文昌8个森林群落结构与物种多样性研究

以文昌航天发射缓冲区不同森林群落为研究对象，选择8个不同植被类型，分别设置1 hm2固定大样地，对森林植物群落的多样性、森林植物群落的物种均匀度、森林植物群落的物种优势度进行观测。结果表明：不同森林群落乔木层物种多样性差异显著，半红树林群落树种种类最高，物种多样性最高达到2.38，其次分别是天然次生林和人工混交林；不同森林群落中不同层次植物均匀度总体表现出草本层＞灌木层＞乔木层的规律，但天然次生林由于郁闭度较高，林下草本较灌木少，多样性和均匀度均小于灌木层；红树林物种优势度最小，各物种优势差异不显著。

Forest Community Structure and Species Diversity of Eight Forest Types in Wenchang City

Taking Wenchang space launch buffer different forest community as the research object, select eight different vegetation types, respectively set up 1 hm2 fixed details, to the diversity of forest plant community, forest species evenness of plant community, species of forest plant community dominance. The results showed that: significant difference was found in different forest community species diversity of the tree layer, half the highest species mangrove species, species diversity to a maximum of 2.38, the natural forest and artificial mixed forests secondly; the different plants levels in different forest community evenness showed overall herb layer > shrub layer > tree layer, but because of natural secondary forest canopy density is higher, forests herbs relatively less shrubs, diversity and evenness were smaller than that of shrub layer; Mangrove species dominance to a minimum, each species advantage difference was not significant.