DOI: 10.1111/1365-2435.13484
论文题名: Plant–bacteria–soil response to frequency of simulated nitrogen deposition has implications for global ecosystem change
作者: Cao J. ; Pang S. ; Wang Q. ; Williams M.A. ; Jia X. ; Dun S. ; Yang J. ; Zhang Y. ; Wang J. ; Xiaotao L.U. ; Hu Y. ; Li L. ; Li Y. ; Han X.
刊名: Functional Ecology
ISSN: 2698463
出版年: 2020
卷: 34, 期: 3 语种: 英语
英文关键词: 16S rRNA gene
; above-ground net primary productivity
; below-ground net primary productivity
; high-throughput sequencing
; microbial diversity
; plant diversity
Scopus关键词: Bacteria (microorganisms)
英文摘要: Atmospheric nitrogen (N) deposition, generally, has been simulated through a single or relatively few N applications per year for its ecological effect study. Despite the importance of timing in ecosystem processes, ecological experiments with more realistic N addition frequencies are rare. We employed a novel design with typical twice (2X) versus atypical monthly (12X) N applications per year to explore effects of N addition frequency on above- and below-ground biodiversity and function. Each year, several response variables from either below-ground or above-ground growth, N status and cycling, or plant and bacterial diversity differed as a result of N addition frequency. BNPP showed a large frequency effect in the relatively moist year but not in the dry year. Nitrogen addition decreased root growth in the monthly relative to the biannual applications, which could be highly consequential for predicting changes in global carbon and nitrogen cycling. Simulated N deposition tended to perturb biodiversity, but it is noteworthy that 12X applications that spread N deposition more evenly through a year have much less negative impacts on plant and bacterial diversities than 2X amendments per year. Soil N mineralization rate in year 6 was much lower when N additions were monthly compared with a biannual amendment, especially when simulated N deposition was high. We have established that amendment frequency matters for understanding ecosystem response to N deposition. Experiments that more closely mimic the anthropogenic process of N deposition are needed to best assess ecosystem and potential global biogeochemical changes. A free Plain Language Summary can be found within the Supporting Information of this article. © 2019 British Ecological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158766
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; School of Plant and Environmental Science, Virginia Tech, Blacksburg, VA, United States; State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; School of Land Science and Technology, China University of Geosciences, Beijing, China; Tropical Research and Education Center, Soil and Water Science Department, University of Florida, Homestead, FL, United States
Recommended Citation:
Cao J.,Pang S.,Wang Q.,et al. Plant–bacteria–soil response to frequency of simulated nitrogen deposition has implications for global ecosystem change[J]. Functional Ecology,2020-01-01,34(3)