Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14578 |
Drainage enhances modern soil carbon contribution but reduces old soil carbon contribution to ecosystem respiration in tundra ecosystems | |
Kwon, Min Jung1,2; Natali, Susan M.3; Pries, Caitlin E. Hicks4,5; Schuur, Edward A. G.6,7; Steinhof, Axel1; Crummer, K. Grace8,11; Zimov, Nikita; Zimov, Sergey A.9; Heimann, Martin1,9,10; Kolle, Olaf1; Goeckede, Mathias1 | |
2019-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:4页码:1315-1325 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; South Korea; USA; Russia; Finland |
英文摘要 | Warming temperatures are likely to accelerate permafrost thaw in the Arctic, potentially leading to the release of old carbon previously stored in deep frozen soil layers. Deeper thaw depths in combination with geomorphological changes due to the loss of ice structures in permafrost, may modify soil water distribution, creating wetter or drier soil conditions. Previous studies revealed higher ecosystem respiration rates under drier conditions, and this study investigated the cause of the increased ecosystem respiration rates using radiocarbon signatures of respired CO2 from two drying manipulation experiments: one in moist and the other in wet tundra. We demonstrate that higher contributions of CO2 from shallow soil layers (0-15 cm; modern soil carbon) drive the increased ecosystem respiration rates, while contributions from deeper soil (below 15 cm from surface and down to the permafrost table; old soil carbon) decreased. These changes can be attributed to more aerobic conditions in shallow soil layers, but also the soil temperature increases in shallow layers but decreases in deep layers, due to the altered thermal properties of organic soils. Decreased abundance of aerenchymatous plant species following drainage in wet tundra reduced old carbon release but increased aboveground plant biomass elevated contributions of autotrophic respiration to ecosystem respiration. The results of this study suggest that drier soils following drainage may accelerate decomposition of modern soil carbon in shallow layers but slow down decomposition of old soil carbon in deep layers, which may offset some of the old soil carbon loss from thawing permafrost. |
英文关键词 | carbon source partitioning drying experiment ecosystem respiration permafrost radiocarbon soil hydrology |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461817500010 |
WOS关键词 | PERMAFROST CARBON ; ORGANIC-MATTER ; WARMING PERMAFROST ; PLANT RESPIRATION ; CO2 EMISSION ; DIOXIDE ; TEMPERATURE ; RELEASE ; THAW ; DECOMPOSITION |
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/16479 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Max Planck Inst Biogeochem, Jena, Germany; 2.Korea Polar Res Inst, Incheon, South Korea; 3.Woods Hole Res Ctr, Falmouth, MA USA; 4.Lawrence Berkeley Natl Lab, Earth Sci Div, Berkeley, CA USA; 5.Dartmouth Coll, Dept Biol Sci, Hanover, NH 03755 USA; 6.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA; 7.No Arizona Univ, Dept Biol Sci, Box 5640 St, Flagstaff, AZ 86011 USA; 8.Univ Florida, Dept Biol, Gainesville, FL USA; 9.Russian Acad Sci, Far Eastern Branch, Pacific Inst Geog, North East Sci Stn, Yakutia, Republic Of Sak, Russia; 10.Univ Helsinki, Div Atmospher Sci, Dept Phys, Helsinki, Finland; 11.Univ Florida, Inst Sustainable Food Syst, POB 110570, Gainesville, FL 32611 USA |
推荐引用方式 GB/T 7714 | Kwon, Min Jung,Natali, Susan M.,Pries, Caitlin E. Hicks,et al. Drainage enhances modern soil carbon contribution but reduces old soil carbon contribution to ecosystem respiration in tundra ecosystems[J]. GLOBAL CHANGE BIOLOGY,2019,25(4):1315-1325. |
APA | Kwon, Min Jung.,Natali, Susan M..,Pries, Caitlin E. Hicks.,Schuur, Edward A. G..,Steinhof, Axel.,...&Goeckede, Mathias.(2019).Drainage enhances modern soil carbon contribution but reduces old soil carbon contribution to ecosystem respiration in tundra ecosystems.GLOBAL CHANGE BIOLOGY,25(4),1315-1325. |
MLA | Kwon, Min Jung,et al."Drainage enhances modern soil carbon contribution but reduces old soil carbon contribution to ecosystem respiration in tundra ecosystems".GLOBAL CHANGE BIOLOGY 25.4(2019):1315-1325. |
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