Origin of Cave Fungi

Frontiers in Microbiology
Zhi-Feng ZhangL Cai

Abstract

Karst caves are obviously characterized by darkness, constantly low temperature, high humidity, and oligotrophy. Previous studies revealed that Karst caves have a high and specific bio-diversity. A large number of troglobiont animals had been discovered and their evolution and speciation have been well investigated. However, the origin and evolution of cave fungi remain unknown. In a previous study, we have identified 20 new species, which accounted for 49% of the total number of new species of fungi ever described from caves. In this study, we inferred the divergence times of these 20 new species and compared to the cave formation geologic age. The fossil-calibrated molecular clock showed that the divergence times of these 20 suspected troglobitic fungi are between late Miocene (7.2 Mya for Metapochonia variabilis) and late Jurassic (158 Mya for Gymnoascus exasperates). While based on the historical geological movement and the paleoclimate of Guizhou, it has been estimated that the development of caves in this area was later than middle Pliocene (3.5-4 Mya). It is therefore concluded that the new species described from these caves are unlikely troglobitic fungi but travelers from other environments. The geographic history of c...Continue Reading

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Citations

Jun 5, 2020·PloS One·Benjamin W HeldRobert A Blanchette
Jun 24, 2020·Emerging Microbes & Infections·Samantha Chandranath KarunarathnaPeter Edward Mortimer
Dec 5, 2020·PloS One·Aline O B CunhaCristina M Souza-Motta
Nov 19, 2021·The Science of the Total Environment·Zélia BontempsYvan Moënne-Loccoz

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