【摘要】 本文研究了九龙江口底栖生物种类组成、数量分布、季节变化及其与环境因子的关系等生态特点。结果表明,九龙江口底栖生物种类丰富(计440种)。其分布具有三种生态类型:河口种、海水种和近岸广盐种。平均总生物量为56.17克/米~2,平均栖息密度为358个/米~2。底栖生物与环境因子的关系密切:河口区底栖生物种群和数量的分布趋势是随着盐度的增高而增多;局部区域的水动力特点以及不同的沉积物类型也影响底栖生物种类和数量的分布。更多还原

【Abstract】 This paper studies the ecological characteristics of the composition, distribution and seasonal variation of the benthic fauna and deals with the relationship between the distribution and inhabiting environments of benthic fauna, based on the data obtained from the subtidal zone in the Jiulong Jiang Estuary August, 1980 to October, 1981.In all, 440 species were identified in this area, they might be divided into three ecological groups, i.e.estuarine, neritic euryhaline and marine, and the neritic euryhaline species were the dominant.The averages of the densities and the biomasses of the benthic fauna in this area are 338 ind./m2 and 56.17g/m2 respectively.The distributions of the species, the densities and biomasses of the benthos were extremely uneven.Among the oceanographic conditions which influence the ecological characteristics of the benthic fauna, salinity was the most important, followed by hydrographic dynamics and different sediments.更多还原