Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-019-0384-9 |
Mobilization of aged and biolabile soil carbon by tropical deforestation | |
Drake, Travis W.1,2,4; Van Oost, Kristof3; Barthel, Matti4; Bauters, Marijn5,6; Hoyt, Alison M.7,8; Podgorski, David C.1,2,11; Six, Johan4; Boeckx, Pascal5; Trumbore, Susan E.7,9; Ntaboba, Landry Cizungu10; Spencer, Robert G. M.1,2 | |
2019-07-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:7页码:541-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Belgium; Switzerland; Germany; Rep Congo |
英文摘要 | In the mostly pristine Congo Basin, agricultural land-use change has intensified in recent years. One potential and understudied consequence of this deforestation and conversion to agriculture is the mobilization and loss of organic matter from soils to rivers as dissolved organic matter. Here, we quantify and characterize dissolved organic matter sampled from 19 catchments of varying deforestation extent near Lake Kivu over a two-week period during the wet season. Dissolved organic carbon from deforested, agriculturally dominated catchments was older (C-14 age: similar to 1.5 kyr) and more biolabile than from pristine forest catchments. Ultrahigh-resolution mass spectrometry revealed that this aged organic matter from deforested catchments was energy rich and chemodiverse, with higher proportions of nitrogen- and sulfur-containing formulae. Given the molecular composition and biolability, we suggest that organic matter from deforested landscapes is preferentially respired upon disturbance, resulting in elevated in-stream concentrations of carbon dioxide. We estimate that while deforestation reduces the overall flux of dissolved organic carbon by approximately 56%, it does not significantly change the yield of biolabile dissolved organic carbon. Ultimately, the exposure of deeper soil horizons through deforestation and agricultural expansion releases old, previously stable, and biolabile soil organic carbon into the modern carbon cycle via the aquatic pathway. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000473104300011 |
WOS关键词 | DISSOLVED ORGANIC-MATTER ; MOLECULAR-WEIGHT COMPOUNDS ; LAND-USE CHANGE ; MASS-SPECTROMETER ; RIVERINE EXPORT ; CONGO ; PRECISION ; SIGNATURE ; STOCKS ; PERSISTENCE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/184806 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA; 2.Natl High Magnet Field Lab, Geochem Grp, Tallahassee, FL 32310 USA; 3.Catholic Univ Louvain, Earth & Life Inst, Louvain La Neuve, Belgium; 4.Swiss Fed Inst Technol, Dept Environm Syst Sci, Zurich, Switzerland; 5.Univ Ghent, Dept Green Chem & Technol, Isotope Biosci Lab, Ghent, Belgium; 6.Univ Ghent, Dept Environm, Computat & Appl Vegetat Ecol Lab, Ghent, Belgium; 7.Max Planck Inst Biogeochem, Jena, Germany; 8.Lawrence Berkeley Natl Lab, Berkeley, CA USA; 9.Univ Calif Irvine, Earth Syst Sci, Irvine, CA USA; 10.Univ Catholique Bukavu, Fac Agron, Bukavu, Rep Congo; 11.Univ New Orleans, Dept Chem, Pontchartrain Inst Environm Sci, New Orleans, LA 70148 USA |
推荐引用方式 GB/T 7714 | Drake, Travis W.,Van Oost, Kristof,Barthel, Matti,et al. Mobilization of aged and biolabile soil carbon by tropical deforestation[J]. NATURE GEOSCIENCE,2019,12(7):541-+. |
APA | Drake, Travis W..,Van Oost, Kristof.,Barthel, Matti.,Bauters, Marijn.,Hoyt, Alison M..,...&Spencer, Robert G. M..(2019).Mobilization of aged and biolabile soil carbon by tropical deforestation.NATURE GEOSCIENCE,12(7),541-+. |
MLA | Drake, Travis W.,et al."Mobilization of aged and biolabile soil carbon by tropical deforestation".NATURE GEOSCIENCE 12.7(2019):541-+. |
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