Abstract

In order to understand the species composition, quantity and spatial distribution of both typical shrub communities and their plant propagule bank and their relationship with aboveground plant communities along mountain river, Dicun stream, which was the source of the Jiulong River in the west of Fujian Province, was chosen to study. The seed germination method was used to identify the species of the propagules and the Jaccard similarity index to analyze the similarity between the aboveground plant community and its plant propagules. The results showed that: (1) The number of species in the aboveground communities of the Dicun stream was larger than that of the propagules. (2) The shrub community contained 76 plants belonging to 25 families and 64 genera, and 33 plants belonging to 14 families and 32 genera were found in the propagules. (3) The density of the propagule bank decreased with increasing soil depth, the seeds in the propagule bank were mainly distributed in the shallow soil 0.5 cm, and the number of seeds in the upper layer were 57.8% of the total number of seeds. The Jaccard similarity index of the shrub community in the Dicun Stream Basin was between 0.167 and 0.467, and the similarity between adjacent plots was relatively high, but the similarity between interval plots was relatively low. (4) The number of species shared by the propagules and the aboveground communities in the survey plot was low, the similarity was low, and there was no significant correlation between the density of the propagule bank and the density of aboveground communities. In summary, there were various reasons for the differences between the density and composition of propagules. The difference between the seed bank and the existing community could have been because the seeds in the propagule bank were not all from the existing community, but were from the long-term accumulation of different succession stages.

中文翻译：

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堤村溪流河岸植物群落与植物繁殖库的相关性

摘要

为了了解福建省西部九龙江的源头，即存村河沿岸的典型灌丛群落及其植物繁殖体的物种组成，数量和空间分布及其与地上植物群落的关系。 ，被选中学习。利用种子发芽的方法鉴定了繁殖体的种类和Jaccard相似度指数，分析了地上植物群落与其繁殖体之间的相似性。结果表明：（1）地村溪流地上群落的物种数量大于繁殖种群。（2）灌木群落中有76科植物，隶属于25科64属，在繁殖体中发现有33科植物属于14科32属。（3）繁殖体密度随土层深度的增加而降低，繁殖体中的种子主要分布在0.5 cm的浅层土壤中，上层种子数占种子总数的57.8％。叠村河流域灌木群落的Jaccard相似度指数在0.167至0.467之间，相邻样地之间的相似度较高，而间隔样地之间的相似度较低。（4）调查样地中繁殖体与地上群落共有的物种数量少，相似度低，繁殖体的密度与地上群落的密度之间无显着相关性。总之，繁殖体的密度和组成之间存在差异的原因多种多样。