Department Ecology, Brandenburg University of Technology Cottbus-Senftenberg, D-03013 Cottbus, Germany.
National Institute of Technology Fukushima College, 30 Nagao Kamiarakawa Taira Iwaki, Fukushima 970-8034 Japan.
Eur J Protistol. 2022 Apr;83:125868. doi: 10.1016/j.ejop.2022.125868. Epub 2022 Feb 7.
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.
有壳的后生动物是一个多系的单细胞真核生物组合，它们广泛存在于世界各地的土壤和淡水生境中，对生态系统的功能非常重要，并且可用于生物指示。关于婆罗洲或马来西亚的陆生变形虫的数据很少。在这项研究中，沿着从 1730 米到 4000 米的海拔高度的 10 个海拔梯度，从马来西亚婆罗洲的京那巴鲁山（Mt. Kinabalu）上记录了物种组成和相对丰度的数据。共记录了 78 种有壳变形虫形态型。大多数是小的（小于 100µm），可能是世界性分布的。然而，也观察到了地理分布有限的 Certesella certesi 和一些稀有分类群（例如，Padaungiella lageniformis cordiformis、Placocista jurassica、Trinema chardezi）以及两个未描述的形态种。有壳变形虫的存在/缺失和相对丰度数据与海拔相关，通过非度量多维尺度排序分析揭示了在树线处有明显的变化。我们在东南亚的数据有助于对考虑海拔梯度和真核微生物生物地理学的分布模式进行实际讨论。
