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Basin-scale distribution of prokaryotic phylotypes in the epipelagic layer of the Central South Pacific Ocean during austral summer

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Title: Basin-scale distribution of prokaryotic phylotypes in the epipelagic layer of the Central South Pacific Ocean during austral summer
Authors: Tada, Yuya Browse this author
Shiozaki, Takuhei Browse this author
Ogawa, Hiroshi Browse this author →KAKEN DB
Suzuki, Koji Browse this author →KAKEN DB
Keywords: Marine bacteria
Marine archaea
Fluorescence in situ hybridization
Central South Pacific Ocean
Issue Date: Apr-2017
Publisher: Springer
Journal Title: Journal of oceanography
Volume: 73
Issue: 2
Start Page: 145
End Page: 158
Publisher DOI: 10.1007/s10872-016-0391-z
Abstract: In the present study, we used catalyzed reporter deposition-fluorescence in situ hybridization to quantify the abundance of five bacterial (Alphaproteobacteria, SAR11, Gammaproteobacteria, SAR86, and Bacteroidetes) and two archaeal (Crenarchaeota and Euryarchaeota) phylotypes in the epipelagic layer (0-200 m) of the Central South Pacific Ocean along 170A degrees W from 0A degrees to 40A degrees S. We found that the distribution patterns of these phylotypes differed from each other. All phylotypes except Gammaproteobacteria were particularly abundant at the surface water of the equatorial region, whereas Gammaproteobacteria was relatively abundant in the area from the southern part of the South Pacific Ocean. SAR11, affiliated with Alphaproteobacteria was the dominant phylotype at all depths, throughout the study area. The abundance of SAR11 significantly increased with chlorophyll a concentration, suggesting that phytoplankton could affect their distribution pattern. There was a positive correlation between Bacteroidetes abundance and water temperature, suggesting that the temperature gradient could be a critical factor determining their distribution in the South Pacific Ocean. Crenarchaeota and Euryarchaeota were more abundant at the equatorial region than in other study areas. Euryarchaeota abundance significantly decreased with depth, and increased with chlorophyll a concentration. This suggests that there was ecological interaction between Euryarchaeota and phytoplankton in the equatorial surface. Our data indicate that distinct hydrographic properties such as seawater temperature, salinity, and the concentrations of chlorophyll a and nutrients can principally control the basin-scale distribution of different prokaryotic phylotypes in the epipelagic layer of the Central South Pacific Ocean.
Rights: The final publication is available at Springer via http://dx.doi.org/DOI:10.1007/s10872-016-0391-z
Type: article (author version)
URI: http://hdl.handle.net/2115/68653
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 鈴木 光次

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