气候变化领域集成服务门户(CCPortal): Reconciling multiple impacts of nitrogen enrichment on soil carbon: plant, microbial and geochemical controls

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DOI	10.1111/ele.13083
	Reconciling multiple impacts of nitrogen enrichment on soil carbon: plant, microbial and geochemical controls
	Ye C.; Chen D.; Hall S.J.; Pan S.; Yan X.; Bai T.; Guo H.; Zhang Y.; Bai Y.; Hu S.
发表日期	2018
ISSN	1461023X
卷号	21 期号:8
英文摘要	Impacts of reactive nitrogen (N) inputs on ecosystem carbon (C) dynamics are highly variable, and the underlying mechanisms remain unclear. Here, we proposed a new conceptual framework that integrates plant, microbial and geochemical mechanisms to reconcile diverse and contrasting impacts of N on soil C. This framework was tested using long-term N enrichment and acid addition experiments in a Mongolian steppe grassland. Distinct mechanisms could explain effects of N on particulate and mineral-associated soil C pools, potentially explaining discrepancies among previous N addition studies. While plant production predominated particulate C changes, N-induced soil acidification strongly affected mineral-associated C through decreased microbial growth and pH-sensitive associations between iron and aluminium minerals and C. Our findings suggest that effects of N-induced acidification on microbial respiration and geochemical properties should be included in Earth system models that predict ecosystem C budgets under future N deposition/input scenarios. © 2018 John Wiley & Sons Ltd/CNRS
英文关键词	Acidification; calcium bridging; density fractionation; mineral sorption; nitrogen enrichment; nitrogen limitation
语种	英语
scopus关键词	carbon; nitrogen; ecosystem; microbiology; plant; soil; Carbon; Ecosystem; Nitrogen; Plants; Soil; Soil Microbiology
来源期刊	Ecology Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/121276
作者单位	Ecosystem Ecology Lab, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, China; Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA 50011, United States; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; Department of Entomology & Plant Pathology, North Carolina State University, Raleigh, NC 27695, United States
推荐引用方式 GB/T 7714	Ye C.,Chen D.,Hall S.J.,et al. Reconciling multiple impacts of nitrogen enrichment on soil carbon: plant, microbial and geochemical controls[J],2018,21(8).
APA	Ye C..,Chen D..,Hall S.J..,Pan S..,Yan X..,...&Hu S..(2018).Reconciling multiple impacts of nitrogen enrichment on soil carbon: plant, microbial and geochemical controls.Ecology Letters,21(8).
MLA	Ye C.,et al."Reconciling multiple impacts of nitrogen enrichment on soil carbon: plant, microbial and geochemical controls".Ecology Letters 21.8(2018).