Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13400 |
Methane oxidation in contrasting soil types: responses to experimental warming with implication for landscape-integrated CH4 budget | |
D&1; 39;Imperio, Ludovica2 | |
2017-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark |
英文摘要 | Arctic ecosystems are characterized by a wide range of soil moisture conditions and thermal regimes and contribute differently to the net methane (CH4) budget. Yet, it is unclear how climate change will affect the capacity of those systems to act as a net source or sink of CH4. Here, we present results of insitu CH4 flux measurements made during the growing season 2014 on Disko Island (west Greenland) and quantify the contribution of contrasting soil and landscape types to the net CH4 budget and responses to summer warming. We compared gas flux measurements from a bare soil and a dry heath, at ambient conditions and increased air temperature, using open-top chambers (OTCs). Throughout the growing season, bare soil consumed 0.22 +/- 0.03g CH4-Cm-2 (8.1 +/- 1.2g CO2-eqm(-2)) at ambient conditions, while the dry heath consumed 0.10 +/- 0.02g CH4-Cm-2 (3.9 +/- 0.6g CO2-eqm(-2)). These uptake rates were subsequently scaled to the entire study area of 0.15km(2), a landscape also consisting of wetlands with a seasonally integrated methane release of 0.10 +/- 0.01g CH4-Cm-2 (3.7 +/- 1.2g CO2-eqm(-2)). The result was a net landscape sink of 12.71kg CH4-C (0.48 tonne CO2-eq) during the growing season. A nonsignificant trend was noticed in seasonal CH4 uptake rates with experimental warming, corresponding to a 2% reduction at the bare soil, and 33% increase at the dry heath. This was due to the indirect effect of OTCs on soil moisture, which exerted the main control on CH4 fluxes. Overall, the net landscape sink of CH4 tended to increase by 20% with OTCs. Bare and dry tundra ecosystems should be considered in the net CH4 budget of the Arctic due to their potential role in counterbalancing CH4 emissions from wetlands - not the least when taking the future climatic scenarios of the Arctic into account. |
英文关键词 | Arctic bare soil dry heath Greenland methane budget methane uptake soil moisture warming |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394343300043 |
WOS关键词 | ATMOSPHERIC METHANE ; CLIMATE-CHANGE ; PERMAFROST CARBON ; CONSUMPTION ; SINK ; TEMPERATURE ; EMISSIONS ; EXCHANGE ; ONSET ; AIR |
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/17058 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Copenhagen, Dept Geosci & Nat Resource Management, Ctr Permafrost CENPERM, Oster Voldgade 10, DK-1350 Copenhagen, Denmark; 2.Univ Copenhagen, Dept Geosci & Nat Resource Management, Sect Forest Nat & Biomass, Rolighedsvej 23, DK-1958 Frederiksberg C, Denmark; 3.Univ Copenhagen, Dept Biol, Terr Ecol Sect, Univ Pk 15, DK-2100 Copenhagen O, Denmark |
推荐引用方式 GB/T 7714 | D&,39;Imperio, Ludovica. Methane oxidation in contrasting soil types: responses to experimental warming with implication for landscape-integrated CH4 budget[J]. GLOBAL CHANGE BIOLOGY,2017,23(2). |
APA | D&,&39;Imperio, Ludovica.(2017).Methane oxidation in contrasting soil types: responses to experimental warming with implication for landscape-integrated CH4 budget.GLOBAL CHANGE BIOLOGY,23(2). |
MLA | D&,et al."Methane oxidation in contrasting soil types: responses to experimental warming with implication for landscape-integrated CH4 budget".GLOBAL CHANGE BIOLOGY 23.2(2017). |
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