Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Seasonal Change of Sediment Microbial Communities and Methane Emission in Young and Old Mangrove Forests in Xuan Thuy National Park

  • Cuong Tu Ho (Graduate University of Science and Technology, Vietnam Academy of Science and Technology) ;
  • Unno Tatsuya (Department of Microbiology, Chungbuk National University) ;
  • Son Giang Nguyen (Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology) ;
  • Thi-Hanh Nguyen (Institute of Chemistry, Vietnam Academy of Science and Technology) ;
  • Son Truong Dinh (Vietnam National University of Agriculture) ;
  • Son Tho Le (College of Forestry Biotechnology, Vietnam National University of Forestry) ;
  • Thi-Minh-Hanh Pham (Institute of Mechanics, Vietnam Academy of Science and Technology)
  • Received : 2023.11.29
  • Accepted : 2023.12.21
  • Published : 2024.03.28
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Abstract

Microbial communities in mangrove forests have recently been intensively investigated to explain the ecosystem function of mangroves. In this study, the soil microbial communities under young (<11 years-old) and old (>17 years-old) mangroves have been studied during dry and wet seasons. In addition, biogeochemical properties of sediments and methane emission from the two different mangrove ages were measured. The results showed that young and old mangrove soil microbial communities were significantly different on both seasons. Seasons seem to affect microbial communities more than the mangrove age does. Proteobacteria and Chloroflexi were two top abundant phyla showing >15%. Physio-chemical properties of sediment samples showed no significant difference between mangrove ages, seasons, nor depth levels, except for TOC showing significant difference between the two seasons. The methane emission rates from the mangroves varied depending on seasons and ages of the mangrove. However, this did not show significant correlation with the microbial community shifts, suggesting that abundance of methanogens was not the driving factor for mangrove soil microbial communities.

Keywords

Acknowledgement

This work was supported by the Vietnam Academy of Science and Technology (VAST, Vietnam) for the project No VAST07.04/19-20. This work also got supported by International Environmental Research Institute (Gwangju Institute of Science and Technology, Gwangju, Republic of Korea). We would like also to thank the sampling team including Mr. Tien-Hung Nguyen, Mr. Vu-Thang Nguyen, Mr. Manh-Chien Truong, Mr. Song-Ha Dang, and Mr. Cong-Dien Duong.

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