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	A meta-analysis of the effects of experimental warming on soil carbon and nitrogen dynamics on the Tibetan Plateau
	Zhang X. Z.; Shen, Z. X.; Fu, G.
	2015
关键词	Global warming Increased temperature Microbial biomass Response ratio alpine coniferous forest contrasting light conditions microbial biomass western sichuan terrestrial ecosystems abies-faxoniana organic-carbon picea-asperata climate-change plant-growth
英文摘要	Alpine ecosystems at high altitudes and latitudes are notably sensitive to climatic warming and the Tibetan Plateau is a widely distributed alpine ecosystem. The magnitude of climatic warming on the Tibetan Plateau is expected to be considerably greater than the global average. However, a synthesis of the experimental warming soil carbon and nitrogen data is still lacking and whether forest soils are more sensitive to warming than grassland soils remains unclear. In this study, we used a meta-analysis approach to synthesise 196 observations from 25 published studies on the Tibetan Plateau. Warming significantly increased microbial biomass carbon (MBC) by 14.3% (95% CI: 2.9-24.6%), microbial biomass nitrogen (MBN) by 20.1% (95% CI: 2.0-45.1%), net nitrogen mineralization by 49.2% (95% CI: 38.1-62.3%) and net nitrification by 56.0% (95% CI: 51.4-66.1%), but did not significantly affect soil carbon (95% CI: -13.9 to 2.7%) or nitrogen (95% CI: -12.4 to 2.6%). The mean annual air temperature was negatively correlated with the warming effects on MBC and MBN. Grasslands exhibited significant MBC and MBN responses to warming. Specifically, soil microbial biomass was more responsive to warming in colder environments. Moreover, forest soils are not always more sensitive to warming than grassland soils as previous studies have suggested. These findings indicate that clarifying the effect of warming on alpine soils need consider ecosystem types and their local climate. (C) 2014 Elsevier B.V. All rights reserved.
出处	Applied Soil Ecology
卷	87
页	32-38
收录类别	SCI
语种	英语
ISSN号	0929-1393
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/39028]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhang X. Z.,Shen, Z. X.,Fu, G.. A meta-analysis of the effects of experimental warming on soil carbon and nitrogen dynamics on the Tibetan Plateau. 2015.

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