Polar soils exhibit distinct patterns in microbial diversity and dominant phylotypes

• Published in: Soil Biology and Biochemistry
• Main Authors: Ji, Mukan, Kong, Weidong, Jia, Hongzeng, Delgado-Baquerizo, Manuel, Zhou, Tianqi, Liu, Xiaodong, Ferrari, Belinda C., Malard, Lucie A., Liang, Chao, Xue, Kai, Makhalanyane, Thulani P., Zhu, Yongguan
• Other Authors: Chinese Academy of Sciences, National Natural Science Foundation of China, Ministerio de Ciencia e Innovación (España)
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2022
• Subjects: Antarctic; Arctic; Community structure; Soil microbial diversity; Three poles; Tibetan plateau; The Antarctic; Antarc*
• Online Access: http://hdl.handle.net/10261/258379; https://doi.org/10.1016/j.soilbio.2022.108550; https://doi.org/10.13039/501100002367; https://doi.org/10.13039/501100001809; https://doi.org/10.13039/501100004837

9 páginas.- 4 figuras.- 57 referencias.- Supplementary data to this article can be found online at https://doi. org/10.1016/j.soilbio.2022.108550 The polar regions, comprising the Antarctic, Arctic and Tibetan Plateau, represent the most extreme environments on Earth. Soils across the polar regions harbor diverse microorganisms, which dominate the biogeochemical cycling. However, polar soil microbial diversity is largely underrepresented, and has not been directly compared with the non-polar regions at a global scale, which hinders our understanding of the potential importance of polar microbial diversity. In this study, we investigated the global microbial diversity and taxonomy by comparing 1114 soils, derived from the Antarctic (203), Arctic (432), Tibetan Plateau (104) and non-polar regions (375) across all continents. Soil microbial diversity was found to increase gradually from the Antarctic < Arctic < Tibetan Plateau and < non-polar regions. Soil microbial diversity dominantly corresponded to mean summer temperature in the polar regions and to soil pH in non-polar regions, respectively. Soil microbial community structure significantly differed across the different biogeographical regions, while the Antarctic exhibited the highest habitat-specificity. Over 26,000 phylotypes were observed across global soils, of which 21.8% were unique to the three poles, and 21.2% were apparently ubiquitous globally. Polar soils were dominated by fewer phylotypes, but individual phylotype showed greater dominance than that in non-polar regions. Our study reveals unique patterns of soil microbial diversity and taxonomic compositions in polar regions, and highlights the importance of environmental stresses in controlling soil microbial community. © 2022 Elsevier Ltd This study was supported by the Chinese Academy of Sciences [ XDA19070304 ]; National Natural Science Foundation of China [ 32161123004 and 41771303 ] and the Second Tibetan Plateau Scientific Expedition and Research Program (STEP) [ 2019QZKK0606 ]. ...