气候变化领域集成服务门户(CCPortal): The partitioning of litter carbon fates during decomposition under different rainfall patterns: a laboratory study

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DOI	10.1007/s10533-020-00651-0
	The partitioning of litter carbon fates during decomposition under different rainfall patterns: a laboratory study
	Yang X.; Szlavecz K.; Pitz S.L.; Langley J.A.; Chang C.-H.
发表日期	2020
ISSN	0168-2563
起始页码	153
结束页码	168
卷号	148 期号:2
英文摘要	During litter decomposition, three major fates of litter carbon (C) are possible: emission as carbon dioxide (CO2) into the atmosphere, leaching of dissolved organic carbon (DOC), and translocation and transformation into soil organic carbon (SOC). Soil moisture, one of the key drivers of litter decomposition, is predicted to change in the future due to shifts in precipitation patterns. We explored the effects of low, medium and high rainfall intensities on the partitioning of litter carbon fates in a 6-month long laboratory experiment. We tracked carbon in 13C-labeled tulip poplar litter in a laboratory mesocosms by measuring respiration rates, dissolved organic carbon in the leachate, and soil organic carbon at the end of the experiment. Mesocosms with the same three rainfall intensities but without leaf litter were also set up. Leaching of labile carbon caused priming, but the effect was stronger in the low intensity treatment. Transport of litter-derived carbon also differed: in high intensity treatment there was more total carbon in the surface soil and more litter-derived carbon in in the deep soil layers. The cumulative CO2 efflux was not significantly different. Our results highlight that extreme rainfall events, as projected by most climate models, may lead to altered carbon cycling in temperate forest soils. © 2020, Springer Nature Switzerland AG.
英文关键词	Carbon transport; Extreme rainfall event; Litter carbon partitioning; Priming effect; Temperate forest
语种	英语
scopus关键词	air-soil interaction; carbon cycle; carbon dioxide; decomposition; dissolved organic carbon; forest soil; laboratory method; leaching; leaf litter; partitioning; precipitation intensity; rainfall; soil carbon; soil moisture; temperate forest; Liriodendron tulipifera
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153159
作者单位	Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States; Department of Biology, Villanova University, Villanova, PA, United States; Department of Life Science, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Yang X.,Szlavecz K.,Pitz S.L.,et al. The partitioning of litter carbon fates during decomposition under different rainfall patterns: a laboratory study[J],2020,148(2).
APA	Yang X.,Szlavecz K.,Pitz S.L.,Langley J.A.,&Chang C.-H..(2020).The partitioning of litter carbon fates during decomposition under different rainfall patterns: a laboratory study.Biogeochemistry,148(2).
MLA	Yang X.,et al."The partitioning of litter carbon fates during decomposition under different rainfall patterns: a laboratory study".Biogeochemistry 148.2(2020).