Abstract—

The first data on the species diversity of testate amoebae of the Coco River in the provinces of Quang Nam and Da Nang (Vietnam) are presented. A total of 55 species and subspecies of testate amoebae belonging to nine genera and six families have been identified in 28 samples. Species diversity of testate amoebae in plankton is higher than in benthic samples. Centropyxis aculeata (64.3%), Netzelia wailesi (39.3%), Difflugia acuminata (32.1%), Arcella discoides scutelliformis (28.6%), and Lesquereusia modesta (28.6%) are characterized by the highest frequency of occurrence. Difflugia (25), Arcella (12), Centropyxis (5), and Netzelia (4) are the most species-rich genera. The species accumulation curve based on the entire dataset is unsaturated and is described by the equation y = 12.56N^0.46. The average species richness of testate amoebae per sample in plankton (13.0 ± 3.1) is statistically higher than in benthic samples (1.8 ± 1.5) (p < 0.001). The result of the redundancy analysis shows that the studied hydrochemical water parameters (temperature, pH, dissolved oxygen, electrical conductivity, and salinity) explain only 31.6% of the variation of testate amoeba diversity; the first and second axes explain 11 and 10.2% of this variation, respectively.

中文翻译：

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越南广南省和岘港省可可河中的睾丸变形虫的第一个数据

摘要-

提出了关于广南和岘港（越南）省可可河的睾丸变形虫物种多样性的第一批数据。在28个样本中，共鉴定出属于9个属和6个科的55种睾丸变形虫亚种。浮游生物中的睾丸变形虫的物种多样性高于底栖生物样品。Centropyxis aculeata（64.3％），Netzelia wailesi（39.3％），Difflugia喜树（32.1％），阿尔切拉discoides scutelliformis（28.6％），和Lesquereusia Modesta的（28.6％）由最高出现频率来表征。Difflugia（25），Arcella（12），Centropyxis（5）和Netzelia（4）是物种最多的属。基于整个数据集的物种积累曲线是不饱和的，由方程y = 12.56 N ^0.46描述。浮游生物中每个样品的睾丸变形虫的平均物种丰富度（13.0±3.1）在统计学上高于底栖动物样品（1.8±1.5）（p <0.001）。冗余分析的结果表明，所研究的水化学水参数（温度，pH，溶解氧，电导率和盐度）仅解释了睾丸变形虫多样性变化的31.6％；第一轴和第二轴分别解释了这种变化的11％和10.2％。