DOI: 10.1111/gcb.12816
论文题名: Rhizosphere processes are quantitatively important components of terrestrial carbon and nutrient cycles
作者: Finzi A.C. ; Abramoff R.Z. ; Spiller K.S. ; Brzostek E.R. ; Darby B.A. ; Kramer M.A. ; Phillips R.P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 5 起始页码: 2082
结束页码: 2094
语种: 英语
英文关键词: Carbon cycle
; Global change
; Nitrogen cycle
; Priming effects
; Soil organic matter
Scopus关键词: carbon cycle
; decomposition
; forest soil
; global change
; nitrogen cycle
; rhizosphere
; soil organic matter
; terrestrial ecosystem
; vegetation type
; humic substance
; carbon cycle
; ecosystem
; forest
; humic substance
; meta analysis
; microbiology
; physiology
; plant root
; rhizosphere
; Carbon Cycle
; Ecosystem
; Forests
; Humic Substances
; Plant Roots
; Rhizosphere
英文摘要: While there is an emerging view that roots and their associated microbes actively alter resource availability and soil organic matter (SOM) decomposition, the ecosystem consequences of such rhizosphere effects have rarely been quantified. Using a meta-analysis, we show that multiple indices of microbially mediated C and nitrogen (N) cycling, including SOM decomposition, are significantly enhanced in the rhizospheres of diverse vegetation types. Then, using a numerical model that combines rhizosphere effect sizes with fine root morphology and depth distributions, we show that root-accelerated mineralization and priming can account for up to one-third of the total C and N mineralized in temperate forest soils. Finally, using a stoichiometrically constrained microbial decomposition model, we show that these effects can be induced by relatively modest fluxes of root-derived C, on the order of 4% and 6% of gross and net primary production, respectively. Collectively, our results indicate that rhizosphere processes are a widespread, quantitatively important driver of SOM decomposition and nutrient release at the ecosystem scale, with potential consequences for global C stocks and vegetation feedbacks to climate. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61595
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biology and PhD Program in Biogeoscience, Boston University, Boston, MA, United States; Department of Geography, Indiana University, Bloomington, IN, United States; Department of Biology, Indiana University, Bloomington, IN, United States; Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, United States; Department of Mathematics and Statistics, Boston University, Boston, MA, United States
Recommended Citation:
Finzi A.C.,Abramoff R.Z.,Spiller K.S.,et al. Rhizosphere processes are quantitatively important components of terrestrial carbon and nutrient cycles[J]. Global Change Biology,2015-01-01,21(5)