气候变化领域集成服务门户(CCPortal): Porewater microbiomes in buried wetland soils: Synergic effects of water chemistry and redox gradients associated with hydrological processes

CCPortal

DOI	10.1111/fwb.14253
	Porewater microbiomes in buried wetland soils: Synergic effects of water chemistry and redox gradients associated with hydrological processes
	Kan, Jinjun; Lazareva, Olesya; Oviedo-Vargas, Diana; Mcallister, Sean M.; Chan, Clara S.
发表日期	2024
ISSN	0046-5070
EISSN	1365-2427
起始页码	69
结束页码	6
卷号	69 期号:6
英文摘要	Interstitial water or pore water occupies the space between soil particles and provides hotspots and fluvial networks for microbial activities in floodplain soil. However, to date, we know very little about the microorganisms living in pore water and how they respond to environmental changes. This study aimed to understand microbial distribution and assemblage in riparian pore waters, and how they respond to water chemistry and redox gradients associated with hydrological processes. We analysed the annual changes of porewater microbial communities from the east and west banks of the White Clay Creek, a site at the Christina River Basin - Critical Zone Observatory, Pennsylvania, USA. Microbial abundances were quantified by epifluorescence microscopy and detailed community structures were characterised by high-throughput sequencing. Water chemistry and redox gradients were also monitored and recorded, and their interactions with porewater microbiomes were analysed using correlations and multivariate analyses. Abundance of microbial cells increased during summer and late autumn. Wetland porewater microbiomes mainly contained Acidobacteria, Bacteroidetes, Nitrospirae and Proteobacteria, and microbiome structures were easily distinguishable from those in the underlying hyporheic gravel layer. Seasonal dynamics of bacterial community structure in the east and west wetlands were distinct, responding to floodplain topography and associated hydrological/geochemical processes. Iron (Fe)-cycling bacteria (mainly Gallionellaceae and Rhodoferax spp.) dominated the porewater microbiome, and their relative abundance was significantly higher in the east than the west wetland. Furthermore, Fe-oxidising bacteria (Gallionellaceae) were negatively correlated with Fe-reducing bacteria (Rhodoferax spp.) at the east wetland. Microbial abundances (cell density) in pore waters showed similar seasonal patterns across stream banks, but microbial community structure did not. Microbiome assembly in pore water is correlated with water chemistry and redox gradients primarily associated with local hydrological processes. As a consequence of their significance for carbon (C) mineralisation and Fe reduction at terrestrial-aquatic interfaces, microbiomes in riparian pore waters and associated microbial activity play an essential role in C and mineral dynamics. These findings will inform future studies of the response of freshwater ecosystems to hydrological dynamics influenced by global climate change.
英文关键词	critical zone; Fe-cycling bacteria; microbial population; redox gradients; riparian sediments
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Ecology ; Marine & Freshwater Biology
WOS记录号	WOS:001209004900001
来源期刊	FRESHWATER BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305149
作者单位	University of Delaware; University of Delaware; University of Delaware; University of Washington; University of Washington Seattle
推荐引用方式 GB/T 7714	Kan, Jinjun,Lazareva, Olesya,Oviedo-Vargas, Diana,et al. Porewater microbiomes in buried wetland soils: Synergic effects of water chemistry and redox gradients associated with hydrological processes[J],2024,69(6).
APA	Kan, Jinjun,Lazareva, Olesya,Oviedo-Vargas, Diana,Mcallister, Sean M.,&Chan, Clara S..(2024).Porewater microbiomes in buried wetland soils: Synergic effects of water chemistry and redox gradients associated with hydrological processes.FRESHWATER BIOLOGY,69(6).
MLA	Kan, Jinjun,et al."Porewater microbiomes in buried wetland soils: Synergic effects of water chemistry and redox gradients associated with hydrological processes".FRESHWATER BIOLOGY 69.6(2024).