铁炉港红榄李群落林分结构特征研究

Study on the Community structure Characteristic of Natural Mangrove Lumnitzera littorea in Teilugan

对三亚铁炉港红榄李(Lumnitzera littorea)天然林进行群落调查,设置6个10m×10m调查样方。对样地内的红树植物进行测量,记录红树种类、胸径、株高等指标,并进行重要性、径级等级分析,探讨该红树林林分植被的演替变化。结果表明,在600m^2样方中共记录了6种红树林树种,隶属4科5属,这些树种均具有较强的热带性质。该红榄李群落呈密灌丛状,群落结构相对较为简单,其重要值从大到小依次为红榄李>正红树>海莲>榄李>木果楝>海漆。径级等级分析结果显示,榄李的径级等级分布较为均匀,木果楝和正红树分布于第IV级和第V级,海漆、海莲和红榄李均分布在第V级。该红榄李群落为衰退型,正处于濒危状态,需要进一步加强保护。

In this paper,the natural mangrove Lumnitzera littorea of Tielugan in Sanya City,were investigated six 10×10mplots.inplots were surveged.The mangrove species,DBH,and tree height,by setting up and the importance value(IV)and diameter grades were analyzed.The results showed that there were 6 mangrove species in area of 600 m2 plots,belonging to 4 families and 5 genera,and these species have a strong tropical.The community structure was relatively simple,its important value from large to small followed by Lumnitzera littorea>Rhizophora apiculata>Bruguiera sexangula>Lumnitzera racemosa>Xylocarpus granatum>Excoecaria agallocha.The radial grade analysis showed that Lumnitzera racemosa diameter distribution was uniform,the Xylocarpus granatum distributed in IV grade and the Rhizophora apiculate distributed in V grade.Lumnitzera littorea community belong to the type of declining and is endangered,which need to further protection.