Unexpected fungal communities in the Rehai thermal springs of Tengchong influenced by abiotic factors

Extremophiles : Life Under Extreme Conditions
Kai-Hui LiuWen-Jun Li

Abstract

Fungal communities represent an indispensable part of the geothermal spring ecosystem; however, studies on fungal community within hot springs are still scant. Here, we used Illumina HiSeq 2500 sequencing to detect fungal community diversity in extremely acidic hot springs (pH < 4) and neutral and alkaline springs (pH > 6) of Tengchong-indicated by the presence of over 0.75 million valid reads. These sequences were phylogenetically assigned to 5 fungal phyla, 67 order, and 375 genera, indicating unexpected fungal diversity in the hot springs. The genera such as Penicillium, Entyloma, and Cladosporium dominated the fungal community in the acidic geothermal springs, while the groups such as Penicillium, Engyodontium, and Schizophyllum controlled the fungal assemblages in the alkaline hot springs. The alpha-diversity indices and the abundant fungal taxa were significantly correlated with physicochemical factors of the hot springs particularly pH, temperature, and concentrations of Fe2+, NH4+, NO 2-, and S2-, suggesting that the diversity and distribution of fungal assemblages can be influenced by the complex environmental factors of hot springs.

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Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

R R
vegan
Mothur

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