Insights into macroinvertebrate burrowing activity and methane flux in tidal flats

Title
Insights into macroinvertebrate burrowing activity and methane flux in tidal flats
Author(s)
강정원; 구본주; 정갑식; 우한준; 서재환; 서현석; 김민섭; 권개경
KIOST Author(s)
Kang, Jeong Won(강정원)Koo, Bon Joo(구본주)Jeong, Kap Sik(정갑식)Woo, Han Jun(우한준)Seo, Jaehwan(서재환)Seo, Hyun Seok(서현석)Kwon, Kae Kyoung(권개경)
Publication Year
2018-05-15
Abstract
The CH4 flux was examined preliminarily in tidal flats using a circular closed-chamber method to understand the effects of macroinvertebrate burrowing activity. The chamber was deployed over decapods (mud shrimp, Laomedia astacina and crab, Macrophthalmus japonicus) burrows for ~ 2 h, and the CH4 and CO2 concentrations were continuously monitored using a closed, diffuse CH4/CO2 flux meter. It founds that Laomedia astacina burrow (which is relatively long) site afforded higher-level CH4 production, likely due to diffusive emission of CH4 in deep-layer sediments. In addition, the proposed CH4-oxidation process (i.e., reverse methanogenesis) was supported by the decrease in the δ13C of headspace CO2 during the chamber experiment. Therefore, macroinvertebrate burrows appear to be an important ecosystem environment for controlling atmospheric CH4 over tidal flats. Macrophthalmus japonicus) burrows for ~ 2 h, and the CH4 and CO2 concentrations were continuously monitored using a closed, diffuse CH4/CO2 flux meter. It founds that Laomedia astacina burrow (which is relatively long) site afforded higher-level CH4 production, likely due to diffusive emission of CH4 in deep-layer sediments. In addition, the proposed CH4-oxidation process (i.e., reverse methanogenesis) was supported by the decrease in the δ13C of headspace CO2 during the chamber experiment. Therefore, macroinvertebrate burrows appear to be an important ecosystem environment for controlling atmospheric CH4 over tidal flats.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23365
Bibliographic Citation
ICS 2018, pp.14, 2018
Publisher
KIOST,
Type
Conference
Language
English
Publisher
KIOST,
Related Researcher
Research Interests

Coastal Sedimentary Processes,Micropaleontology(Foraminifera and Pollen),Paleoenvironmental Reconstruction,연안퇴적작용,미고생물(유공충 및 화분),고환경 복원

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