globalchange  > 气候变化事实与影响
DOI: 10.1002/2016GB005467
Scopus ID: 2-s2.0-84988876855
Title:
Redistribution of pyrogenic carbon from hillslopes to stream corridors following a large montane wildfire
Author: Cotrufo M; F; , Boot C; M; , Kampf S; , Nelson P; A; , Brogan D; J; , Covino T; , Haddix M; L; , MacDonald L; H; , Rathburn S; , Ryan-Bukett S; , Schmeer S; , Hall E
Source Publication: Global Biogeochemical Cycles
ISSN: 8866236
Publishing Year: 2016
Volume: 30, Issue:9
pages begin: 1348
pages end: 1355
Language: 英语
Keyword: Black carbon ; BPCA ; Fire ; Pyrogenic carbon ; River ; Sediments
Scopus Keyword: black carbon ; carbon ; dissolved load ; fluvial deposit ; hillslope ; litter ; mountain environment ; soil erosion ; storm deposit ; streamflow ; wildfire ; Rocky Mountains
English Abstract: Pyrogenic carbon (PyC) constitutes a significant fraction of organic carbon in most soils. However, PyC soil stocks are generally smaller than what is expected from estimates of PyC produced from fire and decomposition losses, implying that other processes cause PyC loss from soils. Surface erosion has been previously suggested as one such process. To address this, following a large wildfire in the Rocky Mountains (CO, USA), we tracked PyC from the litter layer and soil, through eroded, suspended, and dissolved solids to alluvial deposits along riversides. We separated deposited sediment into high- and low-density fractions to identify preferential forms of PyC transport and quantified PyC in all samples and density fractions using benzene polycarboxylic acid markers. A few months after the fire, PyC had yet to move vertically into the mineral soil and remained in the organic layer or had been transported off site by rainfall driven overland flow. During major storm events PyC was associated with suspended sediments in river water and later identified in low-density riverbank deposits. Flows from an unusually long-duration and high magnitude rainstorm either removed or buried the riverbank sediments approximately 1 year after their deposition. We conclude that PyC redistributes after wildfire in patterns that are consistent with erosion and deposition of low-density sediments. A more complete understanding of PyC dynamics requires attention to the interaction of post fire precipitation patterns and geomorphological features that control surface erosion and deposition throughout the watershed. ©2016. American Geophysical Union. All Rights Reserved.
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被引频次[WOS]:25   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/77819
Appears in Collections:气候变化事实与影响

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Affiliation: Natural Resources Ecology Laboratory, Colorado State University, Fort Collins, CO, United States; Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO, United States; Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, CO, United States; Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO, United States; Department of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO, United States; Department of Geosciences, Colorado State University, Fort Collins, CO, United States; U.S. Forest Service, Fort Collins, CO, United States

Recommended Citation:
Cotrufo M,F,, Boot C,et al. Redistribution of pyrogenic carbon from hillslopes to stream corridors following a large montane wildfire[J]. Global Biogeochemical Cycles,2016-01-01,30(9)
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