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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). |
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