摘要
野生大豆为中国二级保护植物。本文选取北京地区野生大豆群落中的28个种群,以Spearman秩相关系数为例,分析了野生大豆与其他种群的种间关系。结果表明:野生大豆与多数种群间无显著相关性,说明野生大豆在群落中的存在是相对独立的;同野生大豆呈显著性正相关的物种,它们具有相似的生物性特性,对小生境要求相似,而同野生大豆呈显著性负相关的物种,它们具有不同的生物学特性,对小生境有不同的要求;28个种群种间关系分析表明,大多数种群之间的相关性并不显著,表明群落结构发育不完善,种间关系还不稳定,体现出该群落的不成熟性;秩相关系数与生态位重叠的结合分析显示,相关性越显著的种对,其生态位重叠值也越大;以秩相关系数值为基础,参考种对的生态位重叠值,将28个种群划分为4个生态种组,各生态种组内的种具有相同的资源利用方式和生态需求。
Glycine soja mainly distributes in eastern Asia, and its germplasm is abundant in China. However, G. soja is under the threat of extinction because of human disturbances, and has been ranked as an endangered species in China. For its conservation, 28 species in G. soja com- munity were studied with Spearman＇ s rank correlation to assess the interspecific relationships of G. soja community in Beijing. The results indicated that there were no significant relationships between G. soja and most of other species, which implied that G. soja was distributed independ- ently in the community. The species having positive associations with G. soja owned similar bio- logical features and habitats, ~,hile those having negative associations with G. soja owned differ- ent biological features and habitats. Most interspecific associations of species-pairs among the 28 species were not significant which indicated that the community development was not perfect and the interspecific relationship was not stable. Analyses of rank correlation coefficient and niche overlap showed that the degree of niche overlap was high when interspecific association for pairs of species was high. The 28 species were divided into 4 ecological groups by using rank correlation and niche overlap, and the species in the same ecological groups had the same utilization ways of resources and the same ecological demands.
出处
《生态学杂志》
CAS
CSCD
北大核心
2008年第8期1290-1295,共6页
Chinese Journal of Ecology
基金
国家自然科学基金资助项目(30771248和30070140)
关键词
北京
野生大豆群落
种间关系
生态位重叠
Beijing
Glycine soja community
interspecific relationship
niche overlap.
