Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13806 |
Deep peat warming increases surface methane and carbon dioxide emissions in a black spruce-dominated ombrotrophic bog | |
Gill, Allison L.; Giasson, Marc-Andre; Yu, Rieka; Finzi, Adrien C. | |
2017-12-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Boreal peatlands contain approximately 500Pg carbon (C) in the soil, emit globally significant quantities of methane (CH4), and are highly sensitive to climate change. Warming associated with global climate change is likely to increase the rate of the temperature-sensitive processes that decompose stored organic carbon and release carbon dioxide (CO2) and CH4. Variation in the temperature sensitivity of CO2 and CH4 production and increased peat aerobicity due to enhanced growing-season evapotranspiration may alter the nature of peatland trace gas emission. As CH4 is a powerful greenhouse gas with 34 times the warming potential of CO2, it is critical to understand how factors associated with global change will influence surface CO2 and CH4 fluxes. Here, we leverage the Spruce and Peatland Responses Under Changing Environments (SPRUCE) climate change manipulation experiment to understand the impact of a 0-9 degrees C gradient in deep belowground warming (Deep Peat Heat, DPH) on peat surface CO2 and CH4 fluxes. We find that DPH treatments increased both CO2 and CH4 emission. Methane production was more sensitive to warming than CO2 production, decreasing the C-CO2:C-CH4 of the respired carbon. Methane production is dominated by hydrogenotrophic methanogenesis but deep peat warming increased the C-13 of CH4 suggesting an increasing contribution of acetoclastic methanogenesis to total CH4 production with warming. Although the total quantity of C emitted from the SPRUCE Bog as CH4 is <2%, CH4 represents >50% of seasonal C emissions in the highest-warming treatments when adjusted for CO2 equivalents on a 100-year timescale. These results suggest that warming in boreal regions may increase CH4 emissions from peatlands and result in a positive feedback to ongoing warming. |
英文关键词 | bog climate change greenhouse gas flux Sphagnum warming experiment wetland |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414969000037 |
WOS关键词 | TEMPERATURE SENSITIVITY ; TEMPORAL VARIATIONS ; CLIMATE-CHANGE ; CO2 REDUCTION ; PEATLANDS ; FOREST ; RESPIRATION ; PATHWAYS ; FLUXES ; METHANOGENESIS |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17113 |
专题 | 气候变化 资源环境科学 |
作者单位 | Boston Univ, Dept Biol, 5 Cummington St, Boston, MA 02215 USA |
推荐引用方式 GB/T 7714 | Gill, Allison L.,Giasson, Marc-Andre,Yu, Rieka,et al. Deep peat warming increases surface methane and carbon dioxide emissions in a black spruce-dominated ombrotrophic bog[J]. GLOBAL CHANGE BIOLOGY,2017,23(12). |
APA | Gill, Allison L.,Giasson, Marc-Andre,Yu, Rieka,&Finzi, Adrien C..(2017).Deep peat warming increases surface methane and carbon dioxide emissions in a black spruce-dominated ombrotrophic bog.GLOBAL CHANGE BIOLOGY,23(12). |
MLA | Gill, Allison L.,et al."Deep peat warming increases surface methane and carbon dioxide emissions in a black spruce-dominated ombrotrophic bog".GLOBAL CHANGE BIOLOGY 23.12(2017). |
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