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采用样方法、利用生态位宽度(Levins指数、Hurlbert指数、Feinsinger指数)、生态位相似性比例、生态位重叠对宛田红锥林不同资源位中20个主要种群的生态位进行了测定。结果表明,采用Levins,Hurlbert和Feinsinger三个生态位宽度计测公式结果基本一致;红锥,九节,倒挂铁角蕨的生态位宽度最大,对群落环境的适应和资源利用能力最强;宛田红锥林各主要种群间对生态因子的需求较相似,生态位相似性比例比较高,Cih值大于0.4的有109对,占57.4%;生态位宽度较大的种群间,生态位相似性比例一般较大,如红锥与球序鹅掌柴,九节与罗伞树的Cih值分别为0.709 7,0.741 6;宛田红锥林各主要种群间生态位重叠程度低,表明红锥林利用相同资源位而产生的种间竞争不激烈,群落处于稳定状态。
Using the sample-like method, the niche of 20 main populations in different resource positions of Red Coniferous forest in Wantian were determined by means of niche breadth (Levins index, Hurlbert index, Feinsinger index), niche similarity ratio and niche overlap. The results showed that the results obtained by using Levins, Hurlbert and Feinsinger were basically the same. The red niche, nine knots, the highest niche breadth of the upwelling ferns, the ability to adapt to the community environment and the strongest utilization of resources; Among the main population of Tianhong cone forest, the ecological factors are more similar, the proportion of niche similarity is higher, 109 pairs with Cih value greater than 0.4, accounting for 57.4%; the niche similarity between niche breadth, The proportions are generally larger, such as red cone and Schefflera pyriophylla, Cih values of nine and parachute trees are 0.709 7 and 0.741 6, respectively. The degree of niche overlap among the major populations of red cone forest in Wantian is low, indicating that the red cone The interspecific competition created by Lin using the same resources is not intense and the community is in a stable state.