Predominant control of moisture on soil organic carbon mineralization across a broad range of arid and semiarid ecosystems on the Mongolia plateau
文献类型：期刊论文
| 作者 | Mi, Jia; Li, Jianjun; Chen, Dima; Xie, Yichun1; Bai, Yongfei
|
| 刊名 | LANDSCAPE ECOLOGY
 |
| 出版日期 | 2015 |
| 卷号 | 30期号:9页码:1683-1699 |
| 关键词 | SOC mineralization Precipitation gradient Water filled pore space (WFPS) Temperature sensitivity of SOC mineralization Microbial biomass carbon |
| ISSN号 | 0921-2973 |
| DOI | 10.1007/s10980-014-0040-0 |
| 文献子类 | Article |
| 英文摘要 | Soil moisture and temperature are known to be the two environmental constraints regulating mineralization of soil organic carbon (SOC). However, it remains unclear to what extent the moisture, temperature, and other abiotic and biotic factors affect the mineralization of SOC across broad geographic regions. Here, we examined the effects of multiple abiotic and biotic factors on SOC mineralization across 12 widespread arid and semiarid ecosystems on the Mongolia plateau, by using an integrative approach combining short-term laboratory incubations (28-day), field survey, and structure equation modeling (SEM). Our results showed that soil moisture had a predominant control on SOC mineralization across all sites. The average CO2 emissions over all sites increased by 23 % from 30 to 60 % water filled pore space (WFPS) and by 176 % from 60 to 90 % WFPS. Under conditions of 25 A degrees C and 60 % WFPS, the cumulative CO2-C emissions in the topsoil (0-20 cm) diminished in the following order: meadow steppe (227 mg kg(-1)) > typical steppe (216 mg kg(-1)) > desert (99 mg kg(-1)) > desert steppe (72 mg kg(-1)). The temperature sensitivity of SOC mineralization (Q(10)), the proportional change in carbon mineralization rate given a 10 A degrees C temperature gradient, was highest under conditions of low temperature and high moisture, but it was lowest under high temperature and low moisture. The SEM analyses demonstrate that the mineralization potential of SOC seems to be directly regulated by microbe activity and substrate availability. Climatic factors (e.g. mean annual precipitation, mean annual temperature), above- and belowground biomass, and soil pH, which regulate SOC and microbial biomass carbon content, also indirectly influence the SOC mineralization. Our results indicate that global climate change, particularly the increase in the frequency of extreme storms and droughts, will substantially affect SOC mineralization and ecosystem carbon cycle in arid and semiarid regions. |
| 学科主题 | Ecology ; Geography, Physical ; Geosciences, Multidisciplinary |
| 出版地 | DORDRECHT |
| 电子版国际标准刊号 | 1572-9761 |
| WOS关键词 | TEMPERATURE SENSITIVITY ; MATTER DECOMPOSITION ; CLIMATE-CHANGE ; MICROBIAL BIOMASS ; EURASIAN STEPPE ; LABILE CARBON ; RESPIRATION ; VEGETATION ; NITROGEN ; DEPENDENCE |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000361903500009 |
| 出版者 | SPRINGER |
| 资助机构 | Natural Science Foundation of China [31030013, 31320103916] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050400] ; Land-Cover/Land-Use Program at NASA [NNX09AK87G] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/25650]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China 2.Eastern Michigan Univ, Dept Geog & Geol, Ypsilanti, MI 48197 USA |
| 推荐引用方式 GB/T 7714 | Mi, Jia,Li, Jianjun,Chen, Dima,et al. Predominant control of moisture on soil organic carbon mineralization across a broad range of arid and semiarid ecosystems on the Mongolia plateau[J]. LANDSCAPE ECOLOGY,2015,30(9):1683-1699. |
| APA | Mi, Jia,Li, Jianjun,Chen, Dima,Xie, Yichun,&Bai, Yongfei.(2015).Predominant control of moisture on soil organic carbon mineralization across a broad range of arid and semiarid ecosystems on the Mongolia plateau.LANDSCAPE ECOLOGY,30(9),1683-1699. |
| MLA | Mi, Jia,et al."Predominant control of moisture on soil organic carbon mineralization across a broad range of arid and semiarid ecosystems on the Mongolia plateau".LANDSCAPE ECOLOGY 30.9(2015):1683-1699. |
入库方式： OAI收割
来源：植物研究所
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