GSTDTAP  > 气候变化
DOI10.1111/gcb.13558
Plants, microorganisms, and soil temperatures contribute to a decrease in methane fluxes on a drained Arctic floodplain
Kwon, Min Jung1; Beulig, Felix2,10; Ilie, Iulia1; Wildner, Marcus3,11; Kuesel, Kirsten2,4; Merbold, Lutz5,12; Mahecha, Miguel D.1,4; Zimov, Nikita6; Zimov, Sergey A.6; Heimann, Martin1,7; Schuur, Edward A. G.8; Kostka, Joel E.9; Kolle, Olaf1; Hilke, Ines1; Goeckede, Mathias1
2017-06-01
发表期刊GLOBAL CHANGE BIOLOGY
ISSN1354-1013
EISSN1365-2486
出版年2017
卷号23期号:6
文章类型Article
语种英语
国家Germany; Switzerland; Russia; Finland; USA; Denmark; Kenya
英文摘要

As surface temperatures are expected to rise in the future, ice-rich permafrost may thaw, altering soil topography and hydrology and creating a mosaic of wet and dry soil surfaces in the Arctic. Arctic wetlands are large sources of CH4, and investigating effects of soil hydrology on CH4 fluxes is of great importance for predicting ecosystem feedback in response to climate change. In this study, we investigate how a decade-long drying manipulation on an Arctic floodplain influences CH4-associated microorganisms, soil thermal regimes, and plant communities. Moreover, we examine how these drainage-induced changes may then modify CH4 fluxes in the growing and nongrowing seasons. This study shows that drainage substantially lowered the abundance of methanogens along with methanotrophic bacteria, which may have reduced CH4 cycling. Soil temperatures of the drained areas were lower in deep, anoxic soil layers (below 30 cm), but higher in oxic topsoil layers (0-15 cm) compared to the control wet areas. This pattern of soil temperatures may have reduced the rates of methanogenesis while elevating those of CH4 oxidation, thereby decreasing net CH4 fluxes. The abundance of Eriophorum angustifolium, an aerenchymatous plant species, diminished significantly in the drained areas. Due to this decrease, a higher fraction of CH4 was alternatively emitted to the atmosphere by diffusion, possibly increasing the potential for CH4 oxidation and leading to a decrease in net CH4 fluxes compared to a control site. Drainage lowered CH4 fluxes by a factor of 20 during the growing season, with postdrainage changes in microbial communities, soil temperatures, and plant communities also contributing to this reduction. In contrast, we observed CH4 emissions increased by 10% in the drained areas during the nongrowing season, although this difference was insignificant given the small magnitudes of fluxes. This study showed that long-term drainage considerably reduced CH4 fluxes through modified ecosystem properties.


英文关键词aerenchyma closed dynamic chamber fall methane fluxes methanogens Siberia
领域气候变化 ; 资源环境
收录类别SCI-E
WOS记录号WOS:000400445900023
WOS关键词POLYGONAL TUNDRA ; SP NOV. ; CARBON-DIOXIDE ; LENA DELTA ; METHYLOCYSTIS STRAIN ; GLOBAL DISTRIBUTION ; ARCHAEAL COMMUNITY ; OXIDIZING BACTERIA ; PERMAFROST CARBON ; TUSSOCK TUNDRA
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/17532
专题气候变化
资源环境科学
作者单位1.Max Planck Inst Biogeochem, Hans Knoll Str 10, D-07745 Jena, Germany;
2.Friedrich Schiller Univ Jena, Inst Ecol, Aquat Geomicrobiol, Dornburgerstr 159, D-07743 Jena, Germany;
3.Univ Bayreuth, Fac Biol Chem & Earth Sci, Geoecol Environm Sci Micrometeorol & Atmospher Ch, Univ Str 30, D-95447 Bayreuth, Germany;
4.German Ctr Integrat Biodivers Res iDiv, Deutsch Pl 5d, D-04103 Leipzig, Germany;
5.Swiss Fed Inst Technol, Inst Agr Sci, Dept Environm Syst Sci, Univ Str 16, CH-8092 Zurich, Switzerland;
6.Russian Acad Sci, Pacif Inst Geog, North East Sci Stn, Far Eastern Branch, POB 18, Chersky, Republic Sakha, Russia;
7.Univ Helsinki, Dept Phys, Div Atmospher Sci, POB 64, FI-00014 Helsinki, Finland;
8.No Arizona Univ, Dept Biol Sci, Ctr Ecosyst Sci & Soc, POB 5620, Flagstaff, AZ 86011 USA;
9.Georgia Inst Technol, Sch Biol, North Ave, Atlanta, GA 30332 USA;
10.Aarhus Univ, Ctr Geomicrobiol, Dept Biosci, Ny Munkegade 114-116, DK-8000 Aarhus C, Denmark;
11.Leibniz Inst Freshwater Ecol & Inland Fisheries, Muggelseedamm 310, D-12587 Berlin, Germany;
12.Mazingira Ctr, Int Livestock Res Inst, POB 30709, Nairobi 00100, Kenya
推荐引用方式
GB/T 7714
Kwon, Min Jung,Beulig, Felix,Ilie, Iulia,et al. Plants, microorganisms, and soil temperatures contribute to a decrease in methane fluxes on a drained Arctic floodplain[J]. GLOBAL CHANGE BIOLOGY,2017,23(6).
APA Kwon, Min Jung.,Beulig, Felix.,Ilie, Iulia.,Wildner, Marcus.,Kuesel, Kirsten.,...&Goeckede, Mathias.(2017).Plants, microorganisms, and soil temperatures contribute to a decrease in methane fluxes on a drained Arctic floodplain.GLOBAL CHANGE BIOLOGY,23(6).
MLA Kwon, Min Jung,et al."Plants, microorganisms, and soil temperatures contribute to a decrease in methane fluxes on a drained Arctic floodplain".GLOBAL CHANGE BIOLOGY 23.6(2017).
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