TY - GEN A1 - Wanner, Manfred A1 - Sogame, Yoichiro A1 - Shimizu, Miki T1 - Testate amoebae from two low-lying tropical islets of Tuvalu, South Pacific T2 - Pedobiologia : journal of soil ecology N2 - Testate amoebae are a polyphyletic group of ubiquitous unicellular eukaryotic micro-organisms. They occur in high abundances in freshwater and terrestrial habitats, where they play an important role in biogeochemical and ecological processes. Terrestrial amoeba data from small tropical islands are rarely available despite the fact that they are interesting for investigations on global change induced sea level rise, biodiversity and biogeography. Based on a previously published paper on the impact of increased salinity to testate amoebae, the aim of this study is to present data on amoebal biodiversity from two remote, low-lying tropical islets of Tuvalu (South Pacific). In total 47 species and subspecific taxa of testate amoebae were recorded. These findings are based on 21 soil samples from 7 terrestrial habitats examined microscopically. Most species found were relatively small (< 100 μm) and considered as cosmopolitan. Non-metric multidimensional scaling ordination (NMDS) separated the samples by habitat structure and flooding regime rather than islet origin. Despite the apparently remote character of the study sites, human influence on distribution and biogeography of testate amoebae cannot be excluded. KW - Soil protists KW - Community structure KW - Sea level rise KW - Remote Pacific islands Y1 - 2021 U6 - https://doi.org/10.1016/j.pedobi.2021.150732 SN - 0031-4056 SN - 1873-1511 SP - 87 EP - 88 ER - 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 -