DOI: 10.1007/s10533-013-9949-7
Scopus记录号: 2-s2.0-84897434067
论文题名: Paradigm shifts in soil organic matter research affect interpretations of aquatic carbon cycling: Transcending disciplinary and ecosystem boundaries
作者: Marín-Spiotta E. ; Gruley K.E. ; Crawford J. ; Atkinson E.E. ; Miesel J.R. ; Greene S. ; Cardona-Correa C. ; Spencer R.G.M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 117, 期: 2018-02-03 起始页码: 279
结束页码: 297
语种: 英语
英文关键词: Aquatic
; Black carbon
; Dissolved organic matter
; Lignin
; Marine
; Radiocarbon
; Soil organic matter
; Terrestrial
Scopus关键词: aquatic ecosystem
; bioindicator
; biomarker
; black carbon
; carbon cycle
; climate change
; conceptual framework
; lignin
; marine ecosystem
; molecular analysis
; numerical model
; paradigm shift
; radiocarbon dating
; soil organic matter
; terrestrial ecosystem
英文摘要: New conceptual models that highlight the importance of environmental, rather than molecular, controls on soil organic matter affect interpretations of organic matter (OM) persistence across terrestrial and aquatic boundaries. We propose that changing paradigms in our thinking about OM decomposition explain some of the uncertainties surrounding the fate of land-derived carbon (C) in marine environments. Terrestrial OM, which historically has been thought to be chemically recalcitrant to decay in soil and aquatic environments, dominates inputs to rivers yet is found in trace amounts in the ocean. We discuss three major transformations in our understanding of OM persistence that influence interpretations of the fate of aquatic OM: (1) a shift away from an emphasis on chemical recalcitrance as a primary predictor of turnover; (2) new interpretations of radiocarbon ages, which affect predictions of reactivity; and (3) the recognition that most OM leaving soils in dissolved form has been microbially processed. The first two explain rapid turnover for terrigenous OM in aquatic ecosystems once it leaves the soil matrix. The third suggests that the presence of terrestrial OM in aquatic ecosystems may be underestimated by the use of plant biomarkers. Whether these mechanisms occur in isolation of each other or in combination, they provide insight into the missing terrestrial C signature in the ocean. Spatially and temporally varying transformations of OM along land-water networks require that common terrestrial source indicators be interpreted within specific environmental contexts. We identify areas of research where collaborations between aquatic and terrestrial scientists will enhance quantification of C transfer from soils to inland water bodies, the ocean, and the atmosphere. Accurate estimates of OM processing are essential for improving predictions of the response of vulnerable C pools at the interface of soil and water to changes in climate and land use. © 2014 Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83692
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: Department of Geography, University of Wisconsin-Madison, 550 N. Park St., Madison, WI, 53706, United States; Center for Limnology, University of Wisconsin-Madison, 680 N. Park St., Madison, WI, 53706, United States; National Research Program, U.S. Geological Survey, 3215 Marine St., Boulder, CO, 80303, United States; Department of Forestry, Michigan State University, 480 Wilson Rd., East Lansing, MI, 48824, United States; Department of Botany, University of Wisconsin-Madison, Madison, WI, 53706, United States; Woods Hole Research Center, 149 Woods Hole Rd, Falmouth, MA, 02540, United States
Recommended Citation:
Marín-Spiotta E.,Gruley K.E.,Crawford J.,et al. Paradigm shifts in soil organic matter research affect interpretations of aquatic carbon cycling: Transcending disciplinary and ecosystem boundaries[J]. Biogeochemistry,2014-01-01,117(2018-02-03)