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Authors Kim, J; Lee, J; Yun, J; Yang, YR; Ding, WX; Yuan, JJ; Kang, H
Author Full Name Kim, Jinhyun; Lee, Jaehyun; Yun, Jeongeun; Yang, Yerang; Ding, Weixin; Yuan, Junji; Kang, Hojeong
Title Mechanisms of enhanced methane emission due to introduction of Spartina anglica and Phragmites australis in a temperate tidal salt marsh
Source ECOLOGICAL ENGINEERING
Language English
Document Type Article
Author Keywords Tidal salt marsh; Plant invasion; Phragmites australis; Spartina anglica; Methanogenesis; Methane
Keywords Plus ORGANIC-MATTER DECOMPOSITION; NITROGEN ADDITION AFFECT; INVASIVE ALIEN PLANTS; CARBON SEQUESTRATION; MICROBIAL COMMUNITY; GAS EMISSIONS; GLOBAL CHANGE; ELEVATED CO2; ALTERNIFLORA; CH4
Abstract Introductions of exotic plants are widespread ecological threats disturbing the carbon and nutrient cycles in global coastal wetlands. Previous studies have found that the invasion has enhanced methane emission through increased primary production and a changed methanogenic pathway. However, the previous studies did not determine the depth profiles of the changes while the depth in the soil profile to which the disturbance propagates is one of the critical issues to be addressed. In this study, we illustrated the depth profiles of the effect of the introductions of S. anglica and P. australis on the potential methane production, soil biogeochemistry, and soil microbial community which play a substantial role in enhanced methane emission due to the invasions. The in situ field measurements and anaerobic incubation were conducted to determine the mechanistic differences of depth profiles. Both introductions of S. anglica and P. australis increased methane emission through different microbial mechanisms depending on depth profile. Potential methane production was stimulated in shallow and deep soil layer of S. anglica and P. australis-introduced marshes, respectively. S. anglica increased the contribution of methylotrophic methanogenesis in top soil layers while P. australis decreased competitive inhibition by sulfate reducers in all soil layers. These results emphasize the importance of below-ground microbial activity and vertical distribution in carbon cycles in tidal marshes. Further plant invasion studies should focus on depth profiles of microbial processes, as their distribution and activity vary substantially across soil depths.
Author Address [Kim, Jinhyun; Lee, Jaehyun; Yun, Jeongeun; Yang, Yerang; Kang, Hojeong] Yonsei Univ, Sch Civil & Environm Engn, Seoul 03722, South Korea; [Ding, Weixin; Yuan, Junji] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China
Reprint Address Kang, H (corresponding author), Yonsei Univ, Sch Civil & Environm Engn, Seoul 03722, South Korea.
E-mail Address hj_kang@yonsei.ac.kr
ORCID Number Kang, Hojeong/0000-0002-2088-6406
Funding Agency and Grant Number Ministry of Education of Korea [2019R1A6A3A01091184]; Ministry of Science and ICT of Korea [2019K1A3A1A80113041, 2019K1A3A1A74107424]; Ministry of Oceans and Fisheries of Korea [20170318]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41877039]
Funding Text This study was supported by the funds from the Ministry of Education of Korea [2019R1A6A3A01091184], the Ministry of Science and ICT of Korea [2019K1A3A1A80113041 and 2019K1A3A1A74107424], and the Ministry of Oceans and Fisheries of Korea [20170318], and National Natural Science Foundation of China [41877039].
Publisher ELSEVIER
Publisher City AMSTERDAM
Publisher Address RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
ISSN 0925-8574
29-Character Source Abbreviation ECOL ENG
ISO Source Abbreviation Ecol. Eng.
Publication Date JUN 15
Year Published 2020
Volume 153
Article Number 105905
Digital Object Identifier (DOI) 10.1016/j.ecoleng.2020.105905
Page Count 6
Web of Science Category Ecology; Engineering, Environmental; Environmental Sciences
Subject Category Environmental Sciences & Ecology; Engineering
Document Delivery Number LX7EU
Unique Article Identifier WOS:000539991300018
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