气候变化领域集成服务门户(CCPortal): Bacterial communities and nitrogen transformation genes in streambank legacy sediments and implications for biogeochemical processing

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DOI	10.1007/s10533-020-00659-6
	Bacterial communities and nitrogen transformation genes in streambank legacy sediments and implications for biogeochemical processing
	Sienkiewicz N.; Bier R.L.; Wang J.; Zgleszewski L.; Lutgen A.; Jiang G.; Mattern K.; Inamdar S.; Kan J.
发表日期	2020
ISSN	0168-2563
起始页码	271
结束页码	290
卷号	148 期号:3
英文摘要	Streambank legacy sediments may be important sources of sediment and nutrients from Mid-Atlantic watersheds. However, little is known about the nutrient processing roles of microorganisms that inhabit legacy sediments, let alone their composition, diversity, and distributions. In this study, we sampled 15 streambanks at multiple depths throughout four watersheds in the Mid-Atlantic Region of the USA. High throughput sequencing of 16S ribosomal RNA genes indicated that streambank microbial community composition varied within site depth and across contemporary land uses. Collectively, the most abundant microbial taxa in legacy sediments included Acidobacteria (25–45%), Proteobacteria (15–40%), Nitrospirae (2–10%), Chloroflexi (1–5%), and Actinobacteria (1–10%). Bacterial community composition was distinct between agriculture and urban sites as well as suburban and urban sites. There was significant variation in community composition between the top (1–25%), upper-middle (26–50%), and bottom layers (76–100%) of sediments, while the relative abundances differed between layers for only Acidobacteria and Proteobacteria. Several streambank chemistry variables (metals, %TC, and %TN) had weak positive correlations with community composition. Compared to ammonia-oxidizing bacteria, nitrifying archaea were more predominant. This study provides the first insights into detailed microbial composition of legacy sediments and identifies environmental drivers for community structure and nitrogen processing. Future studies should consider exploring the role of this unique microbial environment for nutrient processing and leaching from legacy sediments and its implications for watershed water quality. © 2020, Springer Nature Switzerland AG.
英文关键词	Land use; Legacy sediment; Microbial community structure; Microbial distribution; Nitrogen transformation; Streambank depth
语种	英语
scopus关键词	bacterium; biogeochemical cycle; community composition; freshwater sediment; gene; microbial community; nitrogen; stream; transformation; watershed; Mid-Atlantic States; United States; Acidobacteria; Actinobacteria; Bacteria (microorganisms); Chloroflexi; Chloroflexi (class); Nitrosomonadales; Nitrospirae; Proteobacteria
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153152
作者单位	Water Science & Policy Graduate Program, University of Delaware, 152 Townsend Hall, Newark, DE 19716, United States; Stroud Water Research Center (SWRC), 970 Spencer Road, Avondale, PA 19311, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE, United States; College of Life Sciences, Tianjin Normal University, Tianjin, China
推荐引用方式 GB/T 7714	Sienkiewicz N.,Bier R.L.,Wang J.,et al. Bacterial communities and nitrogen transformation genes in streambank legacy sediments and implications for biogeochemical processing[J],2020,148(3).
APA	Sienkiewicz N..,Bier R.L..,Wang J..,Zgleszewski L..,Lutgen A..,...&Kan J..(2020).Bacterial communities and nitrogen transformation genes in streambank legacy sediments and implications for biogeochemical processing.Biogeochemistry,148(3).
MLA	Sienkiewicz N.,et al."Bacterial communities and nitrogen transformation genes in streambank legacy sediments and implications for biogeochemical processing".Biogeochemistry 148.3(2020).