DOI: 10.1111/gcb.12108
论文题名: Diel patterns of autotrophic and heterotrophic respiration among phenological stages
作者: Savage K. ; Davidson E.A. ; Tang J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 4 起始页码: 1151
结束页码: 1159
语种: 英语
英文关键词: Autotrophic
; Diel patterns
; Heterotrophic
; Phenology
; Soil respiration
; Temperate
Scopus关键词: carbon dioxide
; aboveground production
; autotrophy
; canopy
; carbon cycle
; carbon dioxide
; carbon flux
; diel migration
; environmental factor
; heterotrophy
; phenology
; respiration
; soil respiration
; soil temperature
; article
; chemistry
; photosynthesis
; soil
; Carbon Dioxide
; Photosynthesis
; Soil
英文摘要: Improved understanding of the links between aboveground production and allocation of photosynthate to belowground processes and the temporal variation in those links is needed to interpret observations of belowground carbon cycling processes. Here, we show that combining a trenching manipulation with high-frequency soil respiration measurements in a temperate hardwood forest permitted identification of the temporally variable influence of roots on diel and seasonal patterns of soil respiration. The presence of roots in an untrenched plot caused larger daily amplitude and a 2-3 h delay in peak soil CO2 efflux relative to a root-free trenched plot. These effects cannot be explained by differences in soil temperature, and they were significant only when a canopy was present during the growing season. This experiment demonstrated that canopy processes affect soil CO2 efflux rates and patterns at hourly and seasonal time scales, and it provides evidence that root and microbial processes respond differently to environmental factors. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62483
Appears in Collections: 影响、适应和脆弱性
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作者单位: The Woods Hole Research Center, 149 Woods Hole Rd, Falmouth, MA, 02540, United States; Ecosystem Centers, Marine Biological Laboratory, 7 MBL Street, Woods Hole, 02543, United States
Recommended Citation:
Savage K.,Davidson E.A.,Tang J.. Diel patterns of autotrophic and heterotrophic respiration among phenological stages[J]. Global Change Biology,2013-01-01,19(4)