气候变化领域集成服务门户(CCPortal): Persistence of dissolved organic matter explained by molecular changes during its passage through soil

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DOI	10.1038/s41561-019-0417-4
	Persistence of dissolved organic matter explained by molecular changes during its passage through soil
	Roth V.-N.; Lange M.; Simon C.; Hertkorn N.; Bucher S.; Goodall T.; Griffiths R.I.; Mellado-Vázquez P.G.; Mommer L.; Oram N.J.; Weigelt A.; Dittmar T.; Gleixner G.
发表日期	2019
ISSN	17520894
卷号	12 期号:9
英文摘要	Dissolved organic matter affects fundamental biogeochemical processes in the soil such as nutrient cycling and organic matter storage. The current paradigm is that processing of dissolved organic matter converges to recalcitrant molecules (those that resist degradation) of low molecular mass and high molecular diversity through biotic and abiotic processes. Here we demonstrate that the molecular composition and properties of dissolved organic matter continuously change during soil passage and propose that this reflects a continual shifting of its sources. Using ultrahigh-resolution mass spectrometry and nuclear magnetic resonance spectroscopy, we studied the molecular changes of dissolved organic matter from the soil surface to 60 cm depth in 20 temperate grassland communities in soil type Eutric Fluvisol. Applying a semi-quantitative approach, we observed that plant-derived molecules were first broken down into molecules containing a large proportion of low-molecular-mass compounds. These low-molecular-mass compounds became less abundant during soil passage, whereas larger molecules, depleted in plant-related ligno-cellulosic structures, became more abundant. These findings indicate that the small plant-derived molecules were preferentially consumed by microorganisms and transformed into larger microbial-derived molecules. This suggests that dissolved organic matter is not intrinsically recalcitrant but instead persists in soil as a result of simultaneous consumption, transformation and formation. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	dissolved organic matter; Fluvisol; grassland soil; molecular analysis; persistence; plant community; soil organic matter; soil surface; temperate environment
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124615
作者单位	Max Planck Institute for Biogeochemistry, Jena, Germany; Thüringer Landesamt für Umwelt, Bergbau und Naturschutz, Jena, Germany; Helmholtz Zentrum München, German Research Center for Environmental Health, Research Unit Analytical Biogeochemistry (BGC), Neuherberg, Germany; Centre for Ecology and Hydrology, Wallingford/Bangor, United Kingdom; Politechnic University of Sinaloa, Mazatlan, Mexico; Plant Ecology and Nature Conservation Group, Wageningen University, Wageningen, Netherlands; Department of Soil Quality, Wageningen University, Wageningen, Netherlands; Institute of Biology, Leipzig University, Leipzig, Germany; Systematic Botany and Functional Biodiversity, Institute of Biology, University of Leipzig, Leipzig, Germany; Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), University of Oldenburg, Institute for Chemistry and Biology of the Marine Environment (ICBM), Oldenburg, Germany; Helmholtz Institute for Functional Marine Biodiversity, University of Oldenburg, Oldenburg, Germany
推荐引用方式 GB/T 7714	Roth V.-N.,Lange M.,Simon C.,et al. Persistence of dissolved organic matter explained by molecular changes during its passage through soil[J],2019,12(9).
APA	Roth V.-N..,Lange M..,Simon C..,Hertkorn N..,Bucher S..,...&Gleixner G..(2019).Persistence of dissolved organic matter explained by molecular changes during its passage through soil.Nature Geoscience,12(9).
MLA	Roth V.-N.,et al."Persistence of dissolved organic matter explained by molecular changes during its passage through soil".Nature Geoscience 12.9(2019).