Geothermal ecosystems on Mt. Erebus, Antarctica, support diverse and taxonomically novel biota
Geothermal ecosystems on Mt. Erebus, Antarctica, support diverse and taxonomically novel biota
Abstract Mt. Erebus, Antarctica, is the southernmost active volcano in the world and harbors a diverse and geochemically unique array of geothermal ecosystems including ‘Subglacial’ and ‘Exposed’ features, surrounded by a vast desert of ice and snow. Previous studies, although limited in scope, have highlighted the unique and potentially endemic biota present on Mt. Erebus. In this study, we provide a systematic biodiversity study across all domains of life and all types of geothermal features present on Mt. Erebus. We present physicochemical and biological data from 39 Exposed samples and 9 Subglacial samples from Mt. Erebus. The taxonomic novelty of prokaryotes and fungi found supports past hypotheses of high endemism among the biota of Mt. Erebus; in particular, the large number of taxonomically divergent fungal sequences was surprising. We found that different site types had unique physicochemistry and biota; in particular, Exposed sites were significantly warmer than Subglacial sites (median: 40 vs 10℃ for Exposed and Subglacial, respectively) and tended to have greater abundances of photosynthetic organisms (Cyanobacteria and Chlorophyta). Subglacial sites were characterized by a greater abundance of prokaryotes from the phylum Actinobacteriota, correlated with the greater concentrations of Ca, Mg, and Sr present. Additionally, we found that Tramway Ridge differed from other Exposed sites as well as all Subglacial sites in physicochemistry (significantly greater conductivity, water content, total carbon, and total nitrogen levels) and biota (greater relative abundances of order Nitrososphaeria and phylum Bacteroidota). In this study, we provide a blueprint for future work aimed at better understanding the novel biota of Mt. Erebus.
Rasmussen Trine Bertram、Noell Stephen E.、Herbold Craig W.、Cary S. Craig、Stott Matthew B.、Richards-Babbage Roanna、McDonald Ian R.、Dickie Ian A.
Thermophile Research Unit, Te Aka M¨?tuatua | School of Science, Te Whare W¨?nanga o Waikato | University of Waikato||International Centre for Terrestrial Antarctic Research, Te Whare W¨?nanga o Waikato | University of WaikatoThermophile Research Unit, Te Aka M¨?tuatua | School of Science, Te Whare W¨?nanga o Waikato | University of Waikato||International Centre for Terrestrial Antarctic Research, Te Whare W¨?nanga o Waikato | University of WaikatoTe Kura P¨±taiao Koiora | School of Biological Sciences, Te Whare W¨?nanga o Waitaha | University of CanterburyThermophile Research Unit, Te Aka M¨?tuatua | School of Science, Te Whare W¨?nanga o Waikato | University of Waikato||International Centre for Terrestrial Antarctic Research, Te Whare W¨?nanga o Waikato | University of WaikatoTe Kura P¨±taiao Koiora | School of Biological Sciences, Te Whare W¨?nanga o Waitaha | University of CanterburyThermophile Research Unit, Te Aka M¨?tuatua | School of Science, Te Whare W¨?nanga o Waikato | University of Waikato||International Centre for Terrestrial Antarctic Research, Te Whare W¨?nanga o Waikato | University of WaikatoThermophile Research Unit, Te Aka M¨?tuatua | School of Science, Te Whare W¨?nanga o Waikato | University of Waikato||International Centre for Terrestrial Antarctic Research, Te Whare W¨?nanga o Waikato | University of WaikatoTe Kura P¨±taiao Koiora | School of Biological Sciences, Te Whare W¨?nanga o Waitaha | University of Canterbury
环境科学理论环境科学技术现状生物科学现状、生物科学发展环境生物学微生物学地质学
Rasmussen Trine Bertram,Noell Stephen E.,Herbold Craig W.,Cary S. Craig,Stott Matthew B.,Richards-Babbage Roanna,McDonald Ian R.,Dickie Ian A..Geothermal ecosystems on Mt. Erebus, Antarctica, support diverse and taxonomically novel biota[EB/OL].(2025-03-28)[2025-05-01].https://www.biorxiv.org/content/10.1101/2024.06.06.597832.点此复制
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