|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Environmental Science / Faculty of Environmental Earth Science >
Peer-reviewed Journal Articles, etc >
Response of Spring Diatoms to CO2 Availability in the Western North Pacific as Determined by Next-Generation Sequencing
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | Response of Spring Diatoms to CO2 Availability in the Western North Pacific as Determined by Next-Generation Sequencing |
| Authors: | Endo, Hisashi Browse this author | | Sugie, Koji Browse this author | | Yoshimura, Takeshi Browse this author →KAKEN DB | | Suzuki, Koji Browse this author →KAKEN DB |
| Issue Date: | 29-Apr-2016 |
| Publisher: | PLOS |
| Journal Title: | PLoS ONE |
| Volume: | 11 |
| Issue: | 4 |
| Start Page: | e0154291 |
| Publisher DOI: | 10.1371/journal.pone.0154291 |
| Abstract: | Next-generation sequencing (NGS) technologies have enabled us to determine phytoplankton community compositions at high resolution. However, few studies have adopted this approach to assess the responses of natural phytoplankton communities to environmental change. Here, we report the impact of different CO2 levels on spring diatoms in the Oyashio region of the western North Pacific as estimated by NGS of the diatom-specific rbcL gene (DNA), which encodes the large subunit of RubisCO. We also examined the abundance and composition of rbcL transcripts (cDNA) in diatoms to assess their physiological responses to changing CO2 levels. A short-term (3-day) incubation experiment was carried out on-deck using surface Oyashio waters under different pCO(2) levels (180, 350, 750, and 1000 mu atm) in May 2011. During the incubation, the transcript abundance of the diatom-specific rbcL gene decreased with an increase in seawater pCO(2) levels. These results suggest that CO2 fixation capacity of diatoms decreased rapidly under elevated CO2 levels. In the high CO2 treatments (750 and 1000 mu atm), diversity of diatom-specific rbcL gene and its transcripts decreased relative to the control treatment (350 mu atm), as well as contributions of Chaetocerataceae, Thalassiosiraceae, and Fragilariaceae to the total population, but the contributions of Bacillariaceae increased. In the low CO2 treatment, contributions of Bacillariaceae also increased together with other eukaryotes. These suggest that changes in CO2 levels can alter the community composition of spring diatoms in the Oyashio region. Overall, the NGS technology provided us a deeper understanding of the response of diatoms to changes in CO2 levels in terms of their community composition, diversity, and photosynthetic physiology. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/64646 |
| 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: 遠藤 寿
|
