High diversity of microplankton surrounds deep-water coral reef in the Norwegian Sea

Jensen, Sigmund, Bourne, David G., Hovland, Martin, and Murrell, J. Colin (2012) High diversity of microplankton surrounds deep-water coral reef in the Norwegian Sea. FEMS Microbiology Ecology, 82 (1). pp. 75-89.

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Abstract

Coral reefs that exist in the depths of the oceans are surrounded by Eukarya, Archaea and bacterial communities that may play an important role in the nutrition and health of the reef. The first interdomain community structure of planktonic organisms in seawater from a deep-water coral reef is described. Community profiling and analysis of ribosomal RNA gene sequences from a coral reef system at 350 m depth in the Norwegian Sea revealed a rich diversity of Eukarya and Bacteria and a moderate diversity of Archaea. Most sequences affiliated with marine microplankton from deep-sea to cold-surface regions, with many sequences being similar to those described in studies of mesopelagic and oxygen minimum zones. Dominant phylotypes belonged to the Alveolata (group I, II, dinoflagellates), Stramenopiles (silicoflagellates), Alphaproteobacteria (Pelagibacter ubique), Gammaproteobacteria (ARCTIC96BD-19), Bacteroidetes (Flavobacteria) and mesophilic Crenarchaeota (Nitrosopumilus maritimus). Several rare and novel members of the community fell into distinct phylogenetic groups. The inferred function of dominant community members suggested autotrophs that utilise light, ammonium or sulphide, and lifestyles based on host associations. The high diversity reflected a microplankton community structure, which is significantly different from that of microplankton collected at the same depth at a pelagic station away from reefs.

Item ID: 51150
Item Type: Article (Research - C1)
ISSN: 1574-6941
Keywords: deep-water coral reef, microplankton, diversity, phylogeny
Funders: Statoil ASA (SA), SA contract 4501359564
Date Deposited: 11 Oct 2017 07:43
FoR Codes: 06 BIOLOGICAL SCIENCES > 0605 Microbiology > 060599 Microbiology not elsewhere classified @ 100%
SEO Codes: 96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 100%
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