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농림성과 수산성과 식품성과 인터뷰
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이승훈(Seung-Hoon Lee)
연세대학교
조회208  주소복사  소셜네트워크로 공유하기
How do Elevated CO2 and Nitrogen Addition Affect Functional Microbial Community Involved in Greenhouse Gas Flux in Salt Marsh System

Seung-Hoon Lee1, Patrick J. Megonigal2, Hojeong Kang1,*

1
School of Civil and Environmental Engineering, Yonsei University, Seoul, South Korea
2 Smithsonian Environmental Research Center, Washington, USA

*To whom correspondence may be addressed.

Abstract
Salt marshes are unique ecosystem of which a microbial community is expected to be affected by global climate change. In this study, by using T-RFLP analysis, quantitative PCR, and pyrosequencing, we comprehensively analyzed the microbial community structure responding to elevated CO2 (eCO2) and N addition in a salt marsh ecosystem subjected to CO2 manipulation and N addition for about 3 years. We focused on the genes of microbes relevant to N-cycling (denitrification and nitrification), CH4-flux (methanogens and methanotrophs), and S-cycling (sulfate reduction) considering that they are key functional groups involved in the nutrient cycle of salt marsh system. Overall, this study suggests that (1) eCO2 and N addition affect functional microbial community involved in greenhouse gas flux in salt marsh system. Specifically, the denitrification process may be facilitated, while the methanogenesis may be impeded due to the outcompeting of sulfate reduction by eCO2 and N. This implies that future global change may cause a probable change in GHGs flux and positive feedback to global climate change in salt marsh; (2) the effect of eCO2 and N on functional group seems specific and to contrast with each other, but the effect of single factor would not be compromised but complemented by combination of two factors. (3) The response of functional groups to eCO2 and/or N may be directly or indirectly related to the plant community and its response to eCO2 and/or N. This study provides new insights into our understanding of functional microbial community responses to eCO2 and/or N addition in a C3/C4 plant mixed salt marsh system.

Keywords : Salt marsh, Elevated CO2, N addition, Functional microbial community, C3/C4 plant

논문정보
- 형식: Research article
- 게재일: 2017년 03월 (BRIC 등록일 2017-03-27)
- 연구진: 국내(교신)+국외 연구진 태극기
- 분야: Ecology, Microbiology, Marine_Biology
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