Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem
文献类型：期刊论文
| 作者 | Yu, Hongying2; Xu, Zhenzhu ; Zhou, Guangsheng1; Shi, Yaohui1
|
| 刊名 | BIOGEOSCIENCES
 |
| 出版日期 | 2020 |
| 卷号 | 17期号:3页码:781-792 |
| ISSN号 | 1726-4170 |
| DOI | 10.5194/bg-17-781-2020 |
| 文献子类 | Article |
| 英文摘要 | Climate change severely impacts the grassland carbon cycling by altering rates of litter decomposition and soil respiration (R-s), especially in arid areas. However, little is known about the R-s responses to different warming magnitudes and watering pulses in situ in desert steppes. To examine their effects on Rs, we conducted long-term moderate warming (4 years, similar to 3 degrees C), short-term acute warming (1 year, similar to 4 degrees C) and watering field experiments in a desert grassland of northern China. While experimental warming significantly reduced average R-s by 32.5% and 40.8% under long-term moderate and short-term acute warming regimes, respectively, watering pulses (fully irrigating the soil to field capacity) stimulated it substantially. This indicates that climatic warming constrains soil carbon release, which is controlled mainly by decreased soil moisture, consequently influencing soil carbon dynamics. Warming did not change the exponential relationship between Rs and soil temperature, whereas the relationship between Rs and soil moisture was better fitted to a sigmoid function. The belowground biomass, soil nutrition, and microbial biomass were not significantly affected by either long-term or short-term warming regimes, respectively. The results of this study highlight the great dependence of soil carbon emission on warming regimes of different durations and the important role of precipitation pulses during the growing season in assessing the terrestrial ecosystem carbon balance and cycle. |
| 学科主题 | Ecology ; Geosciences, Multidisciplinary |
| 出版地 | GOTTINGEN |
| 电子版国际标准刊号 | 1726-4189 |
| WOS关键词 | FLOOR CO2 FLUXES ; TEMPERATURE SENSITIVITY ; PRECIPITATION PULSES ; MICROBIAL COMMUNITY ; ELEVATED CO2 ; HETEROTROPHIC RESPIRATION ; DESERT STEPPE ; NITROGEN ADDITION ; TALLGRASS PRAIRIE ; GROWING-SEASON |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000515166900001 |
| 出版者 | COPERNICUS GESELLSCHAFT MBH |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31661143028, 41775108] ; China Special Fund for Meteorological Scientific Research in the Public Interest (Major projects) [GYHY201506001-3] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/21896]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.China Meteorol Adm, Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Hongying,Xu, Zhenzhu,Zhou, Guangsheng,et al. Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem[J]. BIOGEOSCIENCES,2020,17(3):781-792. |
| APA | Yu, Hongying,Xu, Zhenzhu,Zhou, Guangsheng,&Shi, Yaohui.(2020).Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem.BIOGEOSCIENCES,17(3),781-792. |
| MLA | Yu, Hongying,et al."Soil carbon release responses to long-term versus short-term climatic warming in an arid ecosystem".BIOGEOSCIENCES 17.3(2020):781-792. |
入库方式： OAI收割
来源：植物研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。