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Abstract Detail



Mycological Section

Nagano, Yuriko [1], Miura, Toshiko [2], Nishi, Shinro [2], Fujikura, Katsunori [2].

Fungal diversity in asphalt seep at the Sao Paulo Plateau.

The presence of fungi in deep-sea environments, including deep marine subsurface and their ecological importance in the ecosystems is recognized with much interest recently. Many fungi have been isolated from various deep-sea environments and many novel fungal phylotypes, including novel fungal lineages, have been especially revealed in unique deep-sea chemosynthetic ecosystems, such as hydrothermal vents and methane cold-seeps. In this study, fungal diversity in deep-sea sediments of asphalt seep sites found at the Sao Paulo Plateau during the ‘lata-piuna’ cruise of 2013, was investigated by Ion Torrent PGM sequencing. Three sediment cores taken from an asphalt seep site and one sediment core taken from a non-asphalt seep site were investigated and compared. As a result, a total of 1695 fungal OTUs were detected from the samples tested. The most abundant OTU was Penicillium sp., followed by Cadophora sp. and Rhodosporidium sp.. Interestingly, uncultured fungal group DSF-1, which has been reported in several microoxic deep-sea environments, including bacterial mats and methane seep sediment, was detected only in sediments from asphalt seep sites. In community structure statistical analysis, there was no significant difference between the asphalt seep and non-asphalt seep sites but clear difference was found between sampling sites. These results suggest that there may not be significant difference in fungal community specifically related to asphalt seep despite the high amount of macro organisms surrounding asphalt seep, which are not present at non-asphalt seep sites. However, some fungal groups, such as DSF-1, were present only at asphalt seep site, which may provide key insights into their ecological and physiological role in the ecosystems.


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1 - JAMSTEC, Marine Biodiversity Research, 2-15 Natsushima-cho, Yokosuka, Kanagawa, 237-0061, Japan
2 - JAMSTEC

Keywords:
deep-sea
asphalt seep
Sao Paulo Plateau
Fungi.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PMY023
Abstract ID:1113
Candidate for Awards:None


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