Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13502 |
Litter decay controlled by temperature, not soil properties, affecting future soil carbon | |
Gregorich, Edward G.1; Janzen, Henry2; Ellert, Benjamin H.2; Helgason, Bobbi L.3; Qian, Budong1; Zebarth, Bernie J.4; Angers, Denis A.5; Beyaert, Ronald P.6; Drury, Craig F.7; Duguid, Scott D.8; May, William E.9; McConkey, Brian G.10; Dyck, Miles F.11 | |
2017-04-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada |
英文摘要 | Widespread global changes, including rising atmospheric CO2 concentrations, climate warming and loss of biodiversity, are predicted for this century; all of these will affect terrestrial ecosystem processes like plant litter decomposition. Conversely, increased plant litter decomposition can have potential carbon-cycle feedbacks on atmospheric CO2 levels, climate warming and biodiversity. But predicting litter decomposition is difficult because of many interacting factors related to the chemical, physical and biological properties of soil, as well as to climate and agricultural management practices. We applied C-13-labelled plant litter to soil at ten sites spanning a 3500-km transect across the agricultural regions of Canada and measured its decomposition over five years. Despite large differences in soil type and climatic conditions, we found that the kinetics of litter decomposition were similar once the effect of temperature had been removed, indicating no measurable effect of soil properties. A two-pool exponential decay model expressing undecomposed carbon simply as a function of thermal time accurately described kinetics of decomposition. (R-2 = 0.94; RMSE = 0.0508). Soil properties such as texture, cation exchange capacity, pH and moisture, although very different among sites, had minimal discernible influence on decomposition kinetics. Using this kinetic model under different climate change scenarios, we projected that the time required to decompose 50% of the litter (i.e. the labile fractions) would be reduced by 1-4 months, whereas time required to decompose 90% of the litter (including recalcitrant fractions) would be reduced by 1 year in cooler sites to as much as 2 years in warmer sites. These findings confirm quantitatively the sensitivity of litter decomposition to temperature increases and demonstrate how climate change may constrain future soil carbon storage, an effect apparently not influenced by soil properties. |
英文关键词 | agriculture carbon cycling climate change litter decomposition temperature |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396836800029 |
WOS关键词 | ORGANIC-MATTER DECOMPOSITION ; CLIMATE MODEL SIMULATION ; NET PRIMARY PRODUCTIVITY ; LAST GLACIAL MAXIMUM ; PLANT MATERIAL ; THERMAL-TIME ; WHEAT-STRAW ; TURNOVER ; STABILIZATION ; BIODIVERSITY |
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/16665 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.AAFC, Ctr Res & Dev, Cent Expt Farm, Ottawa, ON K1A 0C6, Canada; 2.AAFC, Ctr Res & Dev, Lethbridge, AB T1J 4B1, Canada; 3.AAFC, Ctr Res & Dev, Saskatoon, SK S7H 5A8, Canada; 4.AAFC, Ctr Res & Dev, Fredericton, NB E3B 4Z7, Canada; 5.AAFC, Ctr Res & Dev, Quebec City, PQ G1V 2J3, Canada; 6.AAFC, Ctr Res & Dev, London, ON N5V 4T3, Canada; 7.AAFC, Ctr Res & Dev, Harrow, ON N0R 1G0, Canada; 8.AAFC, Ctr Res & Dev, Morden, MB R6M 1Y5, Canada; 9.AAFC, Ctr Res & Dev, Indian Head, SK S0G 2K0, Canada; 10.AAFC, Ctr Res & Dev, Swift Current, SK S9H 3X2, Canada; 11.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2H1, Canada |
推荐引用方式 GB/T 7714 | Gregorich, Edward G.,Janzen, Henry,Ellert, Benjamin H.,et al. Litter decay controlled by temperature, not soil properties, affecting future soil carbon[J]. GLOBAL CHANGE BIOLOGY,2017,23(4). |
APA | Gregorich, Edward G..,Janzen, Henry.,Ellert, Benjamin H..,Helgason, Bobbi L..,Qian, Budong.,...&Dyck, Miles F..(2017).Litter decay controlled by temperature, not soil properties, affecting future soil carbon.GLOBAL CHANGE BIOLOGY,23(4). |
MLA | Gregorich, Edward G.,et al."Litter decay controlled by temperature, not soil properties, affecting future soil carbon".GLOBAL CHANGE BIOLOGY 23.4(2017). |
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