Abstract

The first data on testate amoeba composition from Trang An and Van Long wetlands (Ninh Binh province, Vietnam) was obtained. Sixty-three species and subspecies belonging to 9 genera and 6 families were identified from 108 samples collected from these wetlands. Arcella conica, Difflugia pulex, and D. sarissa were recorded in Vietnam for the first time. Species diversity of wetland Van Long (52 species) was higher than Trang An (36). The number of identified species and subspecies was highest in periphytonic samples (49), followed by planktonic (46) and benthic samples (29). The most species-rich genera were Difflugia, Arcella, and Centropyxis in both investigated wetlands. The most frequently occurred testaceans were C. aculeata, D. schurmanni, A. hemisphaerica, A. megastoma arcuata. C. aculeata, D. schurmanni, and D. elegans were the most common species in all investigated types of biotopes including plankton, benthos, and periphyton. The species accumulation curves for Trang An and Van Long wetlands were not saturated and well fitted by equations S = 3.77N^0.56 and S = 16.96N^0.30, respectively. Mean species richness per sample of Trang An wetland was statistically higher than Van Long wetland. The difference in species richness per sample between planktonic and periphytonic samples collected in Trang An wetland was statistically insignificant. In contrast, statistically significant difference in species richness per sample was observed among planktonic, benthic and periphytonic samples collected in Van Long wetland. Species richness per sample in plankton and periphyton was statistically higher than in benthos, while the statistically significant difference between two first ones was not observed. The difference in species richness between samples collected in the rainy (September 2017) and the dry seasons (June 2018) was not statistically significant in Trang An wetland. By contrast, in Van Long wetland, mean species richness per sample in the rainy season was statistically higher than at the end of the dry season. The results of detrended correspondence analysis (DCA) revealed distinct testate amoeba species in association with plankton, periphyton, and benthos habitats in the studied wetlands. These species should be considered as bioindicators for each of these types of biotopes.

中文翻译：

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有关生物群落类型和季节的越南北部热带喀斯特湿地睾丸变形虫组成的第一个数据：新的生物指示潜力

摘要

从Trang An和Van Long湿地（越南Ninh Binh省）获得了关于睾丸变形虫组成的第一批数据。从这些湿地收集的108个样本中鉴定出9个属和6个科的63种和亚种。越南首次录制了Arcella conica，Difflugia pulex和D. sarissa。Van Long（52种）湿地的物种多样性高于Trang An（36种）。在浮游植物中（49个），识别出的物种和亚种的数量最高，其次是浮游生物（46个）和底栖生物（29个）。物种最多的属是Difflugia，Arcell a和Centropyxis在两个被调查的湿地中。最常发生testaceans是C. aculeata，D. schurmanni，A. hemisphaerica，A. megastoma arcuata。C. aculeata，D. schurmanni，和D.线虫在所有调查各类生境，包括浮游生物，底栖生物，和附生最常见的物种。Trang An和Van Long湿地的物种积累曲线未饱和，并通过方程S = 3.77 N ^0.56和S = 16.96 N ^0.30很好地拟合， 分别。董里湿地每个样本的平均物种丰富度在统计学上高于范朗湿地。董里湿地采集的浮游和浮游植物样品的物种丰富度差异在统计学上不显着。相反，在范龙湿地采集的浮游，底栖和浮游植物样本中，每个样本的物种丰富度在统计学上有显着差异。浮游生物和附生植物的每个样品的物种丰富度在统计学上高于底栖生物，而在前两个之间没有观察到统计学上的显着差异。在董里湿地，雨季（2017年9月）和旱季（2018年6月）采集的样本之间物种丰富度的差异在统计学上无统计学意义。相比之下，在万隆湿地，统计上，雨季每个样品的平均物种丰富度高于旱季末。去趋势对应分析（DCA）的结果显示，与研究湿地中的浮游生物，周生植物和底栖生物栖息地相关的独特的睾丸变形虫种类。这些种类应被视为每种类型生物群落的生物指示剂。