Testate Amoebae of a Monsoon Tropical Forest of South Vietnam
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RIS BIB ENDNOTETestate Amoebae of a Monsoon Tropical Forest of South Vietnam
Publication date: 2010
Acta Protozoologica, 2010, Volume 49, Issue 4, pp. 311 - 325
Authors
Testate Amoebae of a Monsoon Tropical Forest of South Vietnam
The composition (143 species and forms) of testate amoebae communities from 68 samples of soils and lake sediments from South Vietnam (Cat Tien National Park) was investigated. In most terrestrial habitats, hydrophilous, soil and even xerophilous testaceans were co-occurring. The likely reason for this phenomenon are sharp seasonal changes in hydrological regime including temporal overwetting or inundation. Typical members of soil communities were Plagiopyxis callida, Tracheleuglypha acolla, Euglypha cristata, E. tuberculata, Trinema complanatum. The fauna was composed mainly of eurybiont species. Less abundant but still common were moss-dwelling species from the genera Heleopera, Hyalosphenia, Nebela and Sphenoderia. Calciphilous species were also present, including Centropyxis plagiostoma, Geopyxella cf. sylvicola, Schwabia terricola, Plagiopyxis callida, P. intermedia v. cyrtostoma, Heleopera petricola v. humicola. Species from the genera Hoogenraadia, Planhoogenraadia, Apolimia were found in this region of South-East Asia for the first time. The variations in the species composition and diversity of testate amoebae in soils was likely caused by several mechanisms including local variations in hydrological regime, the differences in chemical and physical properties and decomposition rates of plant litter, and mineralogical features of soils. The fauna of lake sediments was very distinct with characteristic species Difflugia bacillariarum, Lesquereusia modesta, Arcella gibbosa, Euglypha acanthophora. In the relatively uniform lake sediments local microcommunities were rich in species but very similar in species composition (low beta-diversity). In contrast, in soil samples the micro-scale heterogeneity was usually very pronounced, though the alpha-diversity was lower than in lake sediments. The updated list of testate amoebae of Vietnam includes 237 taxa. Taxa with restricted geographical distribution form up to one tenth of the total species richness.
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Information: Acta Protozoologica, 2010, Volume 49, Issue 4, pp. 311 - 325
Article type: Original article
Department of Soil Science, Lomonosov Moscow State University, Leninskiye gory, Moscow, Russia, 119991
Department of Zoology and Ecology, Penza VG Belinsky State Pedagogical University, Penza, Russia
Department of Hydrobiology, Lomonosov Moscow State University, Moscow, Russia
Joint Russian-Vietnamese Tropical Research and Technology Center, Hanoi, Vietnam
Institute of Ecology and Evolution RAS, Moscow, Russia
Published at: 2010
Received at: 22.05.2010
Accepted at: 22.06.2010
Article status: Open
Licence: None
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