We assessed fungal diversity in water and sediment samples obtained from five Arcticlakes in Ny-Ålesund (Svalbard Islands, High Arctic) and five Antarctic lakes on Livingston andDeception Islands (South Shetland Islands), using DNA metabarcoding. A total of 1,639,074 fungalDNA reads were detected and assigned to 5980 ASVs amplicon sequence variants (ASVs), with only102 (1.7%) that were shared between the two Polar regions. For Arctic lakes, unknown fungal taxadominated the sequence assemblages, suggesting the dominance of possibly undescribed fungi. Thephylum Chytridiomycota was the most represented in the majority of Arctic and Antarctic samples,followed by Rozellomycota, Ascomycota, Basidiomycota, and the less frequent Monoblepharomycota, Aphelidiomycota, Mortierellomycota, Mucoromycota, and Neocallimastigomycota. At the genus level, the mostabundant genera included psychrotolerant and cosmopolitan cold-adapted fungi including Alternaria,Cladosporium, Cadophora, Ulvella (Ascomycota), Leucosporidium, Vishniacozyma (Basidiomycota), andBetamyces (Chytridiomycota). The assemblages displayed high diversity and richness. The assigneddiversity was composed mainly of taxa recognized as saprophytic fungi, followed by pathogenic andsymbiotic fungi.
A deep insight into the Diversity of Microfungal Communities in Arctic and Antarctic Lakes.
Papale M;Rappazzo AC;Azzaro M;Lo Giudice A;
2023
Abstract
We assessed fungal diversity in water and sediment samples obtained from five Arcticlakes in Ny-Ålesund (Svalbard Islands, High Arctic) and five Antarctic lakes on Livingston andDeception Islands (South Shetland Islands), using DNA metabarcoding. A total of 1,639,074 fungalDNA reads were detected and assigned to 5980 ASVs amplicon sequence variants (ASVs), with only102 (1.7%) that were shared between the two Polar regions. For Arctic lakes, unknown fungal taxadominated the sequence assemblages, suggesting the dominance of possibly undescribed fungi. Thephylum Chytridiomycota was the most represented in the majority of Arctic and Antarctic samples,followed by Rozellomycota, Ascomycota, Basidiomycota, and the less frequent Monoblepharomycota, Aphelidiomycota, Mortierellomycota, Mucoromycota, and Neocallimastigomycota. At the genus level, the mostabundant genera included psychrotolerant and cosmopolitan cold-adapted fungi including Alternaria,Cladosporium, Cadophora, Ulvella (Ascomycota), Leucosporidium, Vishniacozyma (Basidiomycota), andBetamyces (Chytridiomycota). The assemblages displayed high diversity and richness. The assigneddiversity was composed mainly of taxa recognized as saprophytic fungi, followed by pathogenic andsymbiotic fungi.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
