DOI: 10.1007/s10533-015-0079-2
Scopus记录号: 2-s2.0-84930272806
论文题名: A new conceptual model on the fate and controls of fresh and pyrolized plant litter decomposition
作者: Soong J.L. ; Parton W.J. ; Calderon F. ; Campbell E.E. ; Cotrufo M.F.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 124, 期: 2018-01-03 起始页码: 27
结束页码: 44
语种: 英语
英文关键词: Decomposition
; Dissolved organic carbon
; Dissolved organic matter
; FTIR
; Leaching
; Leaf litter
; Pyrogenic organic matter
; Respiration
Scopus关键词: aboveground biomass
; carbon cycle
; carbon dioxide
; conceptual framework
; decomposition
; dissolved organic matter
; leaching
; litter
; partitioning
; pollution control
; pyrolysis
英文摘要: In recent years, litter decomposition studies have begun to move beyond the concept of mass loss to consider the fate of fresh and pyrolized decomposing plant material in the ecosystem. However, these concepts have yet to be incorporated into conceptual models of litter decomposition. Understanding how fresh and pyrolized plant litter chemical traits control the partitioning of mass loss to dissolved organic carbon (DOC) leaching and respiration to CO2 would help to inform models of litter-soil-atmosphere carbon (C) cycling. To test these controls, we incubated five fresh and one pyrolized leaf litters with differing chemistry and measured DOC and CO2 fluxes as well as changes in substrate and dissolved organic matter (DOM) chemistry over time using Fourier transformed infrared spectroscopy and wet chemistry. We found that the amount of hot water extractable C was a strong predictor of initial DOC leaching, while the lignocellulose index [Lignin/(Lignin + α-Cellulose)] was a strong inverse predictor of later stage DOC:CO2 partitioning. Changes in substrate and DOM chemistry indicated a progression of substrate availability for leaching: from soluble plant components, to partially decomposed cellulose and lignin, to microbial products. Based on these results we developed a new conceptual model that demonstrates how chemical traits of fresh and pyrolyzed plant litter can be used to predict the fate of aboveground organic matter decomposition and form a better linkage between aboveground decomposition and terrestrial ecosystem C cycling. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83507
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, United States; Central Great Plains Research Station, USDA-ARS, Akron, United States; Department of Soil and Crop Sciences, Colorado State University, Fort Collins, United States
Recommended Citation:
Soong J.L.,Parton W.J.,Calderon F.,et al. A new conceptual model on the fate and controls of fresh and pyrolized plant litter decomposition[J]. Biogeochemistry,2015-01-01,124(2018-01-03)