气候变化领域集成服务门户(CCPortal): Nitrogen-induced acidification plays a vital role driving ecosystem functions: Insights from a 6-year nitrogen enrichment experiment in a Tibetan alpine meadow

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DOI	10.1016/j.soilbio.2020.108107
	Nitrogen-induced acidification plays a vital role driving ecosystem functions: Insights from a 6-year nitrogen enrichment experiment in a Tibetan alpine meadow
	Yang F.; Zhang Z.; Barberán A.; Yang Y.; Hu S.; Guo H.
发表日期	2021
ISSN	380717
卷号	153
英文摘要	Anthropogenic nitrogen (N) input has overtaken natural N fixation as the leading source of reactive N, and can profoundly alter the structure and functions of terrestrial ecosystems. N input impacts ecosystem functions through altering abiotic (e.g., soil nutrients and pH) and biotic (e.g., biological community composition) properties, but the relative importance of these abiotic and biotic effects remains largely unknown. We conducted a 6-year experiment of N manipulations (0, 5, 10, and 20 g N m−2 yr−1) in a Tibetan alpine meadow to assess N-induced abiotic and biotic effects on ecosystem functions. A complementary experiment with acid additions (0, 0.66, 2.65, 4.63, and 7.28 mol H+ m−2 yr−1) was also carried out to examine the direct impact of acidification. We found that N enrichment significantly increased plant productivity but decreased soil microbial respiration. While the increased productivity was associated with increased N availability, the reduction in soil microbial respiration was mainly explained by the decreased soil pH. In the acid addition experiment, enhanced soil acidity due to the increased proton concentration significantly reduced soil microbial respiration. These results indicate that N-induced changes in soil pH represent an important mechanism driving the ecosystem functions, suggesting that N-induced acidification should receive more attention for understanding and predicting ecosystem services under future N-enrichment scenarios. © 2020
英文关键词	Ecosystem functions; N enrichment; Plant communities; Soil microbial communities; Soil properties; Tibetan plateau
语种	英语
scopus关键词	Soil Biology and Biochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158296
作者单位	College of Resources and Environmental Sciences; Nanjing Agricultural University; Nanjing; Jiangsu 210095; China; Department of Environmental Science; The University of Arizona; Tucson; AZ 85719; United States; School of Chemical and Life Sciences; Gansu Normal College for Nationalities; Hezuo; Gansu 747000; China; Department of Plant Pathology; North Carolina State University; Raleigh; NC 27695; United States
推荐引用方式 GB/T 7714	Yang F.,Zhang Z.,Barberán A.,et al. Nitrogen-induced acidification plays a vital role driving ecosystem functions: Insights from a 6-year nitrogen enrichment experiment in a Tibetan alpine meadow[J],2021,153.
APA	Yang F.,Zhang Z.,Barberán A.,Yang Y.,Hu S.,&Guo H..(2021).Nitrogen-induced acidification plays a vital role driving ecosystem functions: Insights from a 6-year nitrogen enrichment experiment in a Tibetan alpine meadow.,153.
MLA	Yang F.,et al."Nitrogen-induced acidification plays a vital role driving ecosystem functions: Insights from a 6-year nitrogen enrichment experiment in a Tibetan alpine meadow".153(2021).