干旱区生态环境知识资源中心(Arid): Organic matter accumulation drives methylotrophic methanogenesis and microbial ecology in a hypersaline coastal lagoon

Arid

DOI	10.1002/lno.12637
	Organic matter accumulation drives methylotrophic methanogenesis and microbial ecology in a hypersaline coastal lagoon
	Keneally, Christopher; Southgate, Matilda; Chilton, Daniel; Gaget, Virginie; Welsh, David T.; Mosley, Luke; Erler, Dirk V.; Kidd, Stephen P.; Brookes, Justin
通讯作者	Keneally, C
来源期刊	LIMNOLOGY AND OCEANOGRAPHY
ISSN	0024-3590
EISSN	1939-5590
出版年	2024
英文摘要	Hypersalinity is common in coastal wetlands throughout warm, tropical, and arid regions. Climate-induced changes in rainfall, sea level, and anthropogenic modification to basins and coastlines are likely to further increase salinization in these ecosystems. Yet, carbon cycling in hypersaline coastal wetlands is not well understood, and poorly constrained in climate models. In the Coorong, a eutrophic, hypersaline coastal lagoon, recognized as internationally important under the Ramsar convention, organic matter rapidly accumulates in deeper areas of the lagoon, through the settling of fine detrital particles, phytoplankton and suspended sediments. During initial surveys, elevated surface water methane (CH4) concentrations were observed above these fine depositional sediments. To identify the drivers of CH4 production, organic matter and sediment characteristics were assessed in surface sediments. Genetic markers (i.e., 16rDNA and the mcrA functional gene) were used to characterize microbial communities. With multiple lines of evidence, this study identifies organic matter, methanogen abundance, and salinity as important drivers of CH4 production, which is concentrated in depositional zones. Archaea were also more abundant in depositional zones, including methylotrophic methanogens: Methanofastidiosales, Methanomasiliicoccales, Methermicoccaceae, and Methanococcoides. These methanogens were highly correlated to CH4 in porewater, suggesting an influence of methylotrophic methanogenesis. To investigate further, metabolic genes were predicted from 16S rRNA with PICRUSt2. This represents the first effort to analyze CH4 dynamics in the Coorong, underscoring the need to integrate these unique ecosystems into global climate models to enhance our understanding of greenhouse gas dynamics and emissions in a changing climate.
类型	Article ; Early Access
语种	英语
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:001272395900001
WOS关键词	SANTA-BARBARA BASIN ; SULFATE REDUCTION ; ANAEROBIC OXIDATION ; METHANE EMISSIONS ; SALINITY ; DIVERSITY ; SEDIMENTS ; COORONG ; ZONE
WOS类目	Limnology ; Oceanography
WOS研究方向	Marine & Freshwater Biology ; Oceanography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404875
推荐引用方式 GB/T 7714	Keneally, Christopher,Southgate, Matilda,Chilton, Daniel,et al. Organic matter accumulation drives methylotrophic methanogenesis and microbial ecology in a hypersaline coastal lagoon[J],2024.
APA	Keneally, Christopher.,Southgate, Matilda.,Chilton, Daniel.,Gaget, Virginie.,Welsh, David T..,...&Brookes, Justin.(2024).Organic matter accumulation drives methylotrophic methanogenesis and microbial ecology in a hypersaline coastal lagoon.LIMNOLOGY AND OCEANOGRAPHY.
MLA	Keneally, Christopher,et al."Organic matter accumulation drives methylotrophic methanogenesis and microbial ecology in a hypersaline coastal lagoon".LIMNOLOGY AND OCEANOGRAPHY (2024).