Freshwater testate amoebae from waterbodies of North Vietnam with the finding of indicator species
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RESEARCH PAPER
Freshwater testate amoebae from waterbodies of North Vietnam with the finding of indicator species Hoan Q. Tran1 · Van T. H. Tran1 · Denis V. Tikhonenkov2 Received: 2 May 2020 / Accepted: 21 October 2020 © The Japanese Society of Limnology 2020
Abstract Testate amoebae are an irreplaceable key component of microbial communities in many aquatic and soil ecosystems and well known as useful bioindicators. In the present work, testate amoebae compositions in different-type biotopes of freshwater waterbodies of North Vietnam were investigated for the first time. A total of 80 species and subspecies belonging to 12 genera and 8 families were identified from 105 samples collected in Suoi Hai, Xuan Khanh, Cam Quy, Ho Ba reservoirs, and Van Long wetland. Difflugia acutissima, D. brychtai, D. distenda, D. elegans teres, D. glans, and Awerintzewia cyclostoma were new records for Vietnam. Centropyxis aculeata, D. schurmanni, and D. elegans were the most common species in all types of biotopes including plankton, benthos, and periphyton. The results of two-way ANOVA showed statistically significant interaction effects of waterbodies and the type of biotopes on testate amoebae species richness per sample (p
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