Fungal and fungal-like diversity in marine sediments from the maritime Antarctic assessed using DNA metabarcoding

We assessed the fungal and fungal-like sequence diversity present in marine sediments obtained in the vicinity of the South Shetland Islands (Southern Ocean) using DNA metabarcoding through high-throughput sequencing (HTS). A total of 193,436 DNA reads were detected in sediment obtained from three l...

Full description

Bibliographic Details
Published in:Scientific Reports
Main Authors: da Silva, Mayanne Karla, de Souza, Láuren Machado Drumond, Vieira, Rosemary, Neto, Arthur Ayres, Lopes, Fabyano A. C., de Oliveira, Fábio S., Convey, Peter, Carvalho-Silva, Micheline, Duarte, Alysson Wagner Fernandes, Câmara, Paulo E. A. S., Rosa, Luiz Henrique
Format: Text
Language:English
Published: Nature Publishing Group UK 2022
Subjects:
Article
Antarctic
Deception Island
English Strait
Livingston Island
South Shetland Islands
Southern Ocean
Walker Bay
Whalers Bay
Antarc*
Antarctica
Online Access:http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9726857/
http://www.ncbi.nlm.nih.gov/pubmed/36473886
https://doi.org/10.1038/s41598-022-25310-2
Description
Summary:We assessed the fungal and fungal-like sequence diversity present in marine sediments obtained in the vicinity of the South Shetland Islands (Southern Ocean) using DNA metabarcoding through high-throughput sequencing (HTS). A total of 193,436 DNA reads were detected in sediment obtained from three locations: Walker Bay (Livingston Island) at 52 m depth (48,112 reads), Whalers Bay (Deception Island) at 151 m (104,704) and English Strait at 404 m (40,620). The DNA sequence reads were assigned to 133 distinct fungal amplicon sequence variants (ASVs) representing the phyla Ascomycota, Basidiomycota, Mortierellomycota, Chytridiomycota, Glomeromycota, Monoblepharomycota, Mucoromycota and Rozellomycota and the fungal-like Straminopila. Thelebolus balaustiformis, Pseudogymnoascus sp., Fungi sp. 1, Ciliophora sp., Agaricomycetes sp. and Chaetoceros sp. were the dominant assigned taxa. Thirty-eight fungal ASVs could only be assigned to higher taxonomic levels, and may represent taxa not currently included in the available databases or represent new taxa and/or new records for Antarctica. The total fungal community displayed high indices of diversity, richness and moderate to low dominance. However, diversity and taxa distribution varied across the three sampling sites. In Walker Bay, unidentified fungi were dominant in the sequence assemblage. Whalers Bay sediment was dominated by Antarctic endemic and cold-adapted taxa. Sediment from English Strait was dominated by Ciliophora sp. and Chaetoceros sp. These fungal assemblages were dominated by saprotrophic, plant and animal pathogenic and symbiotic taxa. The detection of an apparently rich and diverse fungal community in these marine sediments reinforces the need for further studies to characterize their richness, functional ecology and potential biotechnological applications.

Similar Items