TY - GEN A1 - Wanner, Manfred A1 - Sogame, Yoichiro A1 - Shimizu, Miki T1 - An elevation transect study of testate amoeba communities up to 4000 m a.s.l. on Mount Kinabalu, Borneo T2 - European Journal of Protistology N2 - Testate amoebae are a polyphyletic assemblage of unicellular eukaryotes with a specific shell. They occur frequently in soil and freshwater habitats all over the world, important for ecosystem functioning and useful for bio-indication. Terrestrial amoeba data from Borneo or Malaysia are rarely available. In this study, data on species composition and relative abundance were presented along a transect from 1730 m up to 4000 m above sea level from 10 elevational levels on Mt. Kinabalu, Malaysian Borneo. In total 78 morphotypes of testate amoebae were recorded. Most were small (under 100 µm) and supposedly cosmopolitan. However, Certesella certesi with limited geographical distribution and some rare taxa (e.g., Padaungiella lageniformis cordiformis, Placocista jurassica, Trinema chardezi) and two undescribed morphospecies were also observed. Presence/absence and relative abundance data of testate amoebae were associated to elevation with a pronounced change at the tree line, as revealed by non-metric multidimensional scaling ordination analysis. Our data from Southeast Asia contribute to the actual discussion on distributional patterns considering elevation gradients and biogeography of eukaryotic microbes. KW - Soil protists KW - Community structure KW - Malaysia Y1 - 2022 U6 - https://doi.org/10.1016/j.ejop.2022.125868 SN - 0932-4739 VL - Vol. 83 ER - TY - GEN A1 - Tsyganov, Andrey N. A1 - Bobrov, Anatoly A. A1 - Shimano, Satoshi D. A1 - Mitchell, Edward A. D. A1 - Hagiwara, Yasuo A1 - Wall, Adeline A. J. A1 - Wanner, Manfred T1 - Distribution of soil testate amoeba assemblages along an elevation gradient on Mount Fuji T2 - European Journal of Protistology N2 - Elevation gradients have been useful to study distributional patterns of soil organisms since the time of Humboldt but only recently these patterns have been studied for soil microorganisms. Here we report the results on species diversity and composition of soil- and moss-dwelling testate amoeba assemblages along a 1400 m elevation gradient (904–2377 m a.s.l.) on Mount Fuji (Japan) from temperate forest to alpine vegetation. In total, 95 testate amoeba taxa belonging to 29 genera were identified. The core of testate amoeba assemblages was formed by ubiquitous species such as Trinema lineare, Euglypha laevis, Cryptodifflugia oviformis, and Trinema complanatum. However, several taxa with limited geographic distribution were also observed (e.g., Centropyxis latideflandriana, C. stenodeflandriana, Plagiopyxis cf. barrosi, Heleopera rectangularis, and Distomatopyxis couillardi). Species diversity indices (species richness and Shannon’s index) were characterised by bell-shaped patterns peaking at ∼ 1700 m in the subalpine mixed conifer-deciduous forest. The species composition of testate amoeba assemblages was best explained by the vegetation types which accounted for 12.3% of the total variation. Overall, these findings indicate that elevation effects on species composition of testate amoeba assemblages are strongly mediated by vegetation. KW - Protists KW - Biogeography KW - Elevation KW - Vegetation type KW - Distribution Y1 - 2022 U6 - https://doi.org/10.1016/j.ejop.2022.125894 SN - 0932-4739 VL - 84 SP - 1 EP - 12 ER -