Spatial Distribution Pattern of Populations of Isoetes sinensis Palmer, an Endangered Quillwort in China

作     者：WANG Jingyuan Robert Wahiti Gituru CHEN Jinming WANG Oingfeng 

作者机构：College of Life Sciences Wuhan University Wuhan 430072Hubei China Botany Department Jomo Kenyatta University of Agriculture and Technology P. O. Box 62000-00200 Nairobi Kenya 

出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报（自然科学英文版）)

年 卷 期：2006年第11卷第3期

页      面：694-698页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：Supported by the State Key Basic Research and DevelopmentProgram(G2000046805) 

主　　题：quillwort population distribution pattern distribution scale conservation 

摘      要：The distribution pattern of Isoetes sinensis populations was investigated in relation to its biological characteristics such as age structure and regeneration mode, and the microenvironment. Contagious distribution pattern was found in populations of all sizes. Under the same climatic and site conditions, the heterogeneity of mieroenvironment resulting from the different depths of water and soil erosion significantly affecred the type and scale of distribution patterns of Isoetes sinensis populations. Even at the same site, the center and the edges of the water body had different effects on the distribution pattern of the plants. As one of the co-dominants, the distribution of Isoetes sinensis in communities was affected by other dominant species, especially by the evergreen grass species. Water is the major factor determining the distribution pattern of lsoetes sinensis in various communities. The pattern of contagious distribution was observed in different size of populations of ***, however the Lloyd indices obtained for the populations of various sizes differed significantly.