Abstract
We evaluated the diversity and distribution of viable fungi present in permafrost and active layers obtained from three islands of Maritime Antarctica. A total of 213 fungal isolates were recovered from the permafrost, and 351 from the active layer, which were identified in 58 taxa; 27 from permafrost and 31 from the active layer. Oidiodendron, Penicillium, and Pseudogymnoascus taxa were the most abundant in permafrost. Bionectriaceae, Helotiales, Mortierellaceae, and Pseudeurotium were the most abundant in the active layer. Only five shared both substrates. The yeast Mrakia blollopis represented is the first reported on Antarctic permafrost. The fungal diversity detected was moderate to high, and composed of cosmopolitan, cold-adapted, and endemic taxa, reported as saprobic, mutualistic, and parasitic species. Our results demonstrate that permafrost shelters viable fungi across the Maritime Antarctica, and that they are contrasting to the overlying active layer. We detected important fungal taxa represented by potential new species, particularly, those genetically close to Pseudogymnoascus destructans, which can cause extinction of bats in North America and Eurasia. The detection of viable fungi trapped in permafrost deserves further studies on the extension of its fungal diversity and its capability to expand from permafrost to other habitats in Antarctica, and elsewhere.
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We acknowledge the financial support from CNPq PROANTAR 442258/2018-6, INCT Criosfera II, CAPES (88887.136384/2017-00 and 88887.314457/2019-00), CNPq, FAPEMIG, and FNDCT. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.
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da Silva, T.H., Silva, D.A.S., de Oliveira, F.S. et al. Diversity, distribution, and ecology of viable fungi in permafrost and active layer of Maritime Antarctica. Extremophiles 24, 565–576 (2020). https://doi.org/10.1007/s00792-020-01176-y
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DOI: https://doi.org/10.1007/s00792-020-01176-y