广西红树植物群落特征的初步研究

Characteristics of Mangrove Communities in Guangxi

关键词:  红树林  群落生态  群落特征  群落演替

Key words:  mangroves  community ecology  community characteristic  community succession

摘要:

从生境条件、种类组成、类型、外貌、结构、物种多样性和演替等方面系统地分析广西红树植物群落的生态特征。广西红树植物群落的建群种有白骨壤、桐花树、秋茄、红海榄、木榄、海漆、老鼠筋和银叶树8种。主要群落可划分为8个群系,15个群落类型。群落外貌由单叶、革质、中型叶的高位芽植物决定。群落层次结构简单,单层或两层。组成群落的红树植物的物种多样性较低。随着海平面的相对降低和土壤理化性质的改善,红树植物群落具有向陆生植物群落演化的趋势。

Abstract:

Ecological characteristics of habitat condition, flora, type, physiognomy, structure, species diversity, and succession of mangrove communities in Guangxi are systematically analyzed.Guangxi mangrove communities consist mainly of 8 species, which are Avicennia marina, Aegiceras corniculatum, Kandelia candel, Rhizophora stylosa, Bruguiera gymnorrhiza, Excoecaria agallocha, Acanthus ilicifolius and Heritiera littoralis. The main communities can be classified into 8 formations and 15 community types.The physiognomy of the mangrove communities is dominant by both the life form with phanerophyte and the leave characters with mesophylls, coriaceous texture, and One form.The structure of the mangrove communities is rather simple, one layer or two layers.Species diversity indices of the mangrove communities are relatively low.Along with the relative reduction of sea level and physical and chemical amendment of the soils, the mangrove community succession directs toward terrestrial plant community.