%0 Journal Article
%T Aestival Characteristics of Small Zooplankton Communities in the Main Tributaries of the Dongjiang River<br>东江支流夏季小型浮游动物群落特征研究
%A PENG Qiuzhi
%A LIAO Jianyu
%A WU Kai
%A LIU Quanru
%A ZHOU Yunlong
%A JIANG Yuan
%A GONG Ling
%A <br>彭秋志
%A 廖剑宇
%A 伍凯
%A 刘全儒
%A 周云龙
%A 江源
%A 龚玲
%J 资源科学
%D 2013
%I 
%X Our goal was to describe the aestival features of small zooplankton communities in the main tributaries of the Dongjiang River and test the possibility of using prominent features derived from the zooplankton community as predictive indicators of water quality. By systematically selecting representative tributaries of the Dongjiang River as case study sites, we randomly sampled small zooplankton (Protozoa and Rotifers) communities along the tributaries in July 2010. The species composition of those zooplankton communities was identified to the genus level, and indices including richness, density, relative density, frequency and diversity were counted. Environmental variables including temperature, dissolved oxygen, electrical conductivity, total phosphorus, total nitrogen, ammonia nitrogen, nitrate nitrogen, permanganate index, and chlorophyll a were also measured. We identified 36 genera, of which 23 belonged to Protozoa and 13 to Rotifers. Those taxa in most cases emerged in low density and low richness in samples. Within a sample, however, often one of the genera was found at a relatively high density, while fewer genera dominated the density and frequency. This implied that small river channels are not suitable for zooplankton growth, whereas diversified habitats resulted in a variety of community composition types. An increased trend from up- to down-stream was found in density, richness and diversity, while at the same time a decreased trend in dominance occurred. Many factors, such as zooplankton origins, available nutrients and flow velocity, could all be influencing the small zooplankton community. Significant correlations between the density of certain special genera and most environmental variables were found, indicating that density might be used as the zooplankton indicator in assessing and monitoring river environmental conditions. On the contrary, the diversity of zooplankton should not be used as a competent indicator in assessment, since there was no significant correlation with most environmental factors. In addition, Vorticella significantly dominated the zooplankton communities both in relative density and in frequency, and should be a focus of future work in this area.
%K Dongjiang River
%K River water environment
%K Zooplankton
%K Protozoa
%K Rotifers<br>东江
%K 河流水环境
%K 浮游动物
%K 原生动物
%K 轮虫
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=D096FE55569F28015613C353CAC61C3D&yid=FF7AA908D58E97FA&vid=6209D9E8050195F5&iid=38B194292C032A66&sid=283B38DAD0D068F3&eid=036D726259190A01&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=30