无瓣海桑的直接引入对次生桐花树群落的扰动

Disturbance of Directly Introduction of Sonneratia apetala on the Secondary Aegiceras corniculatum Community

在海南东寨港的次生桐花树灌木群落中直接引入无瓣海桑乔木种群 ,5年后通过样方调查和采样分析的方法 ,研究了无瓣海桑的引入对原灌木群落的扰动效应。结果表明 :①直接引入无瓣海桑乔木种群 ,使桐花树灌木群落的物种多样性、生态优势度和群落均匀度增大 ,促进该灌木群落向更复杂的结构发展 ;②无瓣海桑种群的引入不利于该灌木群落中桐花树种群和白骨壤种群的发展 ;③无瓣海桑种群的引入提高了桐花树群落的土壤酸度和含盐量 ,促进了土壤对N、P、K和有机质的吸收与累积。

In Dongzhai Harbor Reserve of Hainan Island, Sonneratia apetala arbor population was introduced directly into the secondary Aegiceras corniculatum community. After 5 years, based on field quadrat method and sampling analytical method, disturbance effects of S. apetala population (5-year old) on the A. corniculatum community were studied. The results showed: ①With the introduction of S. apetala population, the indexes of species diversity, ecological dominance and degree of homogeneity increased, the structural complexity of the integrated shrub community was developed; ②Introduction of S. apetala population had unfavorable influence on the development of A. corniculatum population and Avicennia marina population; ③With the introduction of S. apetala population, the soil mechanical composition improved, salinity increased, pH reduced, organic matter, total N, total P and total K increased.;