摘要
种群是群落结构和功能的基本单元,群落的优势种对群落结构和环境的形成起着主导作用,然而,优势种对群落结构形成的作用机制以及其种群特征与群落结构的关系鲜见报到。调查了总面积为656 m2雷公山灌木林地,共设置4 m×4 m样方41个,获得相关群落和种群参数,运用SPSS 17.0分析了群落结构参数与种群结构参数之间的关系。结果表明:物种多样性指数与群落内优势种种群粗密度、种群扩散系数、平均树高的偏相关系数分别为-0.927***、-0.928***、-0.913***,均呈显著负相关,即物种多样性指数随着群落内优势种种群粗密度、种群扩散系数、平均树高的数值增大而减小,呈现负相关关系。群落内优势种个体较多不利于建立物种丰富的植物群落结构。进一步验证了优势种在群落中的重要地位和作用。
Population is the basic unit of community structure and function, and dominant populations in community play a key role in the formation of community structure and environment. However, it is still unknown how the dominant population works on the formation of community structure and what is the relationship between them. To answer this, a field investigation was conducted in mountain Leigong dealing with the total number of 41 of 4 m×4 m quadrats in 656 m2of shrubbery. SPSS 17.0 was used to analyze the relationship between the parameter of population and community structure. The results showed that, the partial correlation coefficients of species richness index D and the crude density, diffusion coefficient of population and average plant height of the dominant population in plant community are respectively-0.927＊＊＊,-0.928＊＊＊and-0.913＊＊＊, presenting negative correlation, namely that, the species diversity diminishes with the increased number of dominant population＇s crude density, diffusion coefficient and average plant height of the dominant population. More individuals of the dominant population in plant community are not conducive to plant community diversity. The work further validates the dominant population＇s position and role in plant community.
出处
《广东农业科学》
CAS
CSCD
北大核心
2014年第6期178-182,共5页
Guangdong Agricultural Sciences
基金
国家自然科学基金(40861015)
关键词
重要值
多样性指数
种群特征参数
相关性
important values
diversity index
population characteristics parameters
relevance
