Testate amoebae communities from some freshwater and soil habitats in China (Hubei and Shandong Provinces)

Abstract

Seventy-eight species and forms of testate amoebae were identified from 29 freshwater and soil habitats in three territories of China (Shandong and Hubei Provinces). Most abundant species from the genera Plagiopyxis, Centropyxis and Trinema represent the globally-distributed and eurybiont group of testate amoebae. The species richness was observed to be the lowest (7-12 species per biotope) in sandy sediments of the Yangtze River, but considerably higher (20-30 taxa) in soil environment. In the range of terrestrial habitats, the most remote communities from Laoshan Mountain in Shandong Province, China manifested the highest difference from others. On the other hand, communities originated in the most distant from industrial center places (Guifeng Mountain in Hubei Province, China) possess the most peculiar species composition including specific Gondwanian taxa (e.g. Nebela bigibbosa). In sum, the results obtained provide the evidence that the community complexity and specificity reduce in the places located within areas that are highly populated and intensively visited by humans.

Testate Amoebae from South Vietnam Waterbodies with the Description of New Species Difflugia vietnamica sp. nov.

“…The result of this work shows high species richness of the genera Difflugia, Arcella and Centropyxis. Their dominance in freshwaters is also observed in other regions (Yang et al 2005(Yang et al , 2010Mazei and Tsyganov 2006b, Todorov et al 2008, Bobrov et al 2012a, Davidova and Vasilev 2012, Ju et al 2014. Previous works (Bobrov et al 2012a, Tran 2017) also confirm dominance of these genera in the places which are located in investigated region.…”

Diversity and Distribution of Freshwater Testate Amoebae (Protozoa) Along Latitudinal and Trophic Gradients in China

“…However, the testate amoebae in the Eastern Hemisphere, in contrast to the western, have been less extensively investigated. In particular, previous records of testate amoebae in lakes from China are few and scattered, and most of these studies sampled lake waters—so only sampling planktonic testate amoebae at a particular time of year [ 7 , 55 , 63 , 85 – 88 ]. Recently, Yang et al concluded that trophic status was a main factor that governed the composition and distribution of testate amoebae in Yunnan lakes [ 86 ].…”

Relationships between testate amoeba communities and water quality in Lake Donghu, a large alkaline lake in Wuhan, China

“…Testate amoebae (TA) are benthic (rarely planktonic) microorganisms characterized by an agglutinated or autogenous generally vase-shaped shell (Scott and Medioli, 1983;Medioli and Scott, 1988;Bobrov et al, 1999Bobrov et al, , 2012Mitchell et al, 2008). Previous studies have examined and modeled the relationship between TA diversity, community structure and environmental conditions (especially water chemistry) in various lakes of the world.…”

“…Previous studies have examined and modeled the relationship between TA diversity, community structure and environmental conditions (especially water chemistry) in various lakes of the world. Owing to their high abundance, preservation potential in lacustrine sediments, and distinct response to environmental stress, they are increasingly recognized as good indicators for monitoring water quality and reconstructing palaeoenvironmental changes (Scott and Medioli, 1983;Medioli and Scott, 1988;Reinhardt et al, 1998;Bobrov et al, 1999Bobrov et al, , 2012Patterson et al, 2002;Escobar et al, 2008;Qin et al, 2009Qin et al, , 2011Qin et al, , 2012Roe et al, 2010 ).…”