鼎湖山不同森林类型土壤纤毛虫群落比较研究

发布时间：2018-11-27 11:44

【摘要】：为了丰富对鼎湖山自然保护区生物多样性的研究,了解不同植被类型下土壤原生动物群落的特征,本文对采自鼎湖山自然保护区7种不同植被下的土壤样品进行了土壤纤毛虫定性和定量分析。结果显示:在全部土壤样品中,共检出44属70种土壤纤毛虫。在全部纤毛虫种类中,仅有4种出现在全部土壤样中,它们分别是Bresslaua vorax、Colpoda cucullus、Cyclidium elogatum和Cyrtolophosis elongata。依据物种出现频率高低,鼎湖山自然保护区土壤纤毛虫中,广布种和特有种较少,而常见种较多。不同植被类型下土壤纤毛虫群落丰度介于1 730~29 200 ind./g,表现为针叶林-马尾松林山顶灌草丛针阔叶混交林河岸常绿阔叶林沟谷常绿阔叶林温带季风常绿阔叶林山地常绿阔叶林的特点。纤毛虫群落相似性分析显示:各样点土壤纤毛虫群落间处于中等不相似(0.25~0.5)到中等相似(0.5~0.75)的水平。从本研究结果看,土壤纤毛虫的分布更符合Foissner的"生物地理模型"。相关性分析显示:土壤含水量与土壤纤毛虫丰度之间有极显著的相关性(P0.01),而土壤NO 3-N含量与纤毛虫丰度也有显著的相关性(P0.05)。而多元相关分析表明鼎湖山土壤纤毛虫丰度变化与多个土壤理化因子组合共同作用间存在相关性,其中土壤含水量均作为一个重要组合元素出现。CCA分析显示不同的土壤理化因子对一具体纤毛虫种类的作用存有差异。
[Abstract]:In order to enrich the study of biodiversity in Dinghushan Nature Reserve, the characteristics of soil protozoa communities under different vegetation types were studied. Soil samples collected from 7 different vegetation types in Dinghushan Nature Reserve were qualitatively and quantitatively analyzed. The results showed that there were 44 genera and 70 species of soil ciliates in all soil samples. Of the total ciliate species, only four were found in all soil samples, Bresslaua vorax,Colpoda cucullus,Cyclidium elogatum and Cyrtolophosis elongata., respectively. According to the frequency of species occurrence, in the soil ciliates of Dinghushan Nature Reserve, there are few widespread species and endemic species, but more common species. Abundance of soil ciliates in different vegetation types ranged from 1 730 to 29 200 ind./g, It shows the characteristics of evergreen broad-leaved forest in mountainous area of temperate monsoon evergreen broad-leaved forest and evergreen broad-leaved forest on the banks of evergreen broad-leaved forest and evergreen broad-leaved forest on the top of coniferous forest and Pinus massoniana forest. The similarity analysis of ciliates community showed that the level of medium dissimilarity (0.25 ~ 0.5) to moderate similarity (0.5 ~ 0.75) was found among soil ciliate communities at various points. According to the results of this study, the distribution of soil ciliates is more consistent with Foissner's Biogeography Model. Correlation analysis showed that there was a significant correlation between soil water content and soil ciliate abundance (P0.01), and there was a significant correlation between soil NO 3-N content and ciliates abundance (P0.05). Multivariate correlation analysis showed that the variation of soil ciliate abundance in Dinghushan was correlated with the combination of soil physical and chemical factors. CCA analysis showed that different soil physical and chemical factors had different effects on a specific ciliate species.
【作者单位】：中山大学生命科学学院;
【基金】：国家自然科学基金项目(31030015)资助
【分类号】：S714.3

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