海南岛海草床群落种间关系研究

Research on the interspecific relationships of the seagrass bed communities in Hainan Island

根据2009年对海南岛13个区域野外192个样方的调查数据,本文主要采用X2检验、Ochiai(1957)指数和Spearman秩相关系数,并结合分析样地综合环境研究了10种海草种间关联和相关关系。结果表明,在海草群落种间关系的研究过程中,种对间呈负相关联结的数量明显大于正相关数量,总体上呈现负联结趋势,海南岛海草群落尚未达到稳定状态,物种的组成还会发生变化,仍处于发展演替之中,较容易受外界因素干扰而发生波动。根据分析结果将10个海草种划分成2个生态种组,分为喜生淤泥种组的羽叶二药和贝克喜盐以及以海神草、泰莱藻为主相互联结的非喜生淤泥种种组。生态种组内的物种利用资源方式和生态位很相似,而组间具有明显的差异。生态种组的划分能为海草的保护与修复提供理论依据。

Based on the investigation data of 192 quadrats,which were investigated in 13 regions in Hainan Island in the year of 2009,and by using X2 test、Ochiai(1957) index、Spearman rank correlation coefficient,combined with the integrated environment analysis on samples,the paper researched the interspecific relationships between 10 seagrass species.The results showed that,the interspecific association between the seagrass species was negative correlation and the number of the negative correlation was evidently higher than that of the positive correlation,which suggested the species composition would change,and the seagrass communities in Hainan Island has not yet reach a steady state,and the seagrass communities was under a dynamic succession and tended to fluctuation or even degradation by external disturbances.Dividing 10 seagrass species into 2 ecological species groups as silt species(Halodule pinifolia and Halophila beccarii) and non-joy-silt species(the others),in the same ecological group,their utilization resource and ecological demands were similar,and those of different ecological groups was not similar.The results of the interspecific relationship analysis can laid theoretical foundation for protecting and repairing the seagrass bed communities.