Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands
文献类型：期刊论文
| 作者 | Liu Ting3; Wang Liang3; Feng Xiaojuan2,3; Zhang Jinbo1; Ma Tian2,3 ; Wang Xin2,3; Liu Zongguang3
|
| 刊名 | Biogeosciences
 |
| 出版日期 | 2018-03 |
| 卷号 | 15页码:1627-1641 |
| 关键词 | DISSOLVED ORGANIC-CARBON INORGANIC CARBON ISOTOPE FRACTIONATION RAINFALL VARIABILITY TEMPORAL VARIATION CLIMATE EXTREMES NORWAY SPRUCE DIOXIDE FLUX NITROGEN MATTER |
| ISSN号 | 1726-4170 |
| DOI | 10.5194/bg-15-1627-2018 |
| 英文摘要 | Respiration and leaching are two main processes responsible for soil carbon loss. While the former has received considerable research attention, studies examiningleaching processes are limited, especially in semiarid grass lands due to low precipitation. Climate change may increase the extreme precipitation event (EPE) frequency in arid and semiarid regions, potentially enhancing soil carbon loss through leaching and respiration. Here we incubated soil columns of three typical grassland soils from Inner Mongo lia and the Qinghai–Tibetan Plateau and examined the effect of simulated EPEs on soil carbon loss through respiration and leaching. EPEs induced a transient increase in CO2 release through soil respiration, equivalent to 32 and 72 % of the net ecosystem productivity (NEP) in the temperate grass lands (Xilinhot and Keqi) and 7 % of NEP in the alpine grass lands (Gangcha). By comparison, leaching loss of soil carbon accounted for 290, 120, and 15 % of NEP at the corresponding sites, respectively, with dissolved inorganic carbon (DIC, biogenic DIC + lithogenic DIC) as the main form of carbon loss in the alkaline soils. Moreover, DIC loss increased with recurring EPEs in the soil with the highest pH due to an elevated contribution of dissolved CO2 from organic carbondegradation (indicated by DIC-δ13C). These results highlight the fact that leaching loss of soil carbon (particularly in the form of DIC) is important in the regional carbon budget of arid and semiarid grasslands and also imply that SOC min eralization in alkaline soils might be underestimated if only measured as CO2 emission from soils into the atmosphere. With a projected increase in EPEs under climate change, soilcarbon leaching processes and the influencing factors war rant a better understanding and should be incorporated into soil carbon models when estimating carbon balance in grass land ecosystems. |
| WOS研究方向 | Ecology ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000427717900002 |
| 源URL | [http://ir.yic.ac.cn/handle/133337/40052]  |
| 专题 | 中国科学院烟台海岸带研究所 个人在本单位外知识产出 |
| 通讯作者 | Feng Xiaojuan |
| 作者单位 | 1.School of Geography Sciences, Nanjing Normal University, Nanjing 210023, China 2.University of Chinese Academy of Sciences, Beijing, China 3.State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China |
| 推荐引用方式 GB/T 7714 | Liu Ting,Wang Liang,Feng Xiaojuan,et al. Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands[J]. Biogeosciences,2018,15:1627-1641. |
| APA | Liu Ting.,Wang Liang.,Feng Xiaojuan.,Zhang Jinbo.,Ma Tian.,...&Liu Zongguang.(2018).Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands.Biogeosciences,15,1627-1641. |
| MLA | Liu Ting,et al."Comparing soil carbon loss through respiration and leaching under extreme precipitation events in arid and semiarid grasslands".Biogeosciences 15(2018):1627-1641. |
入库方式： OAI收割
来源：烟台海岸带研究所
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