DOI: 10.1111/gcb.13110
论文题名: Shifts in functional traits elevate risk of fire-driven tree dieback in tropical savanna and forest biomes
作者: Pellegrini A.F.A. ; Franco A.C. ; Hoffmann W.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2016
卷: 22, 期: 3 起始页码: 1235
结束页码: 1243
语种: 英语
英文关键词: Bark thickness
; Carbon
; Cerrado
; Fire
; Functional traits
; Savanna
; Tree dieback
; Tropical forest
; Woody encroachment
Scopus关键词: bark
; Brazil
; carbon cycle
; fire
; forest
; grassland
; growth, development and aging
; plant stem
; tree
; tropic climate
; Brazil
; Carbon Cycle
; Fires
; Forests
; Grassland
; Plant Bark
; Plant Stems
; Trees
; Tropical Climate
英文摘要: Numerous predictions indicate rising CO2 will accelerate the expansion of forests into savannas. Although encroaching forests can sequester carbon over the short term, increased fires and drought-fire interactions could offset carbon gains, which may be amplified by the shift toward forest plant communities more susceptible to fire-driven dieback. We quantify how bark thickness determines the ability of individual tree species to tolerate fire and subsequently determine the fire sensitivity of ecosystem carbon across 180 plots in savannas and forests throughout the 2.2-million km2 Cerrado region in Brazil. We find that not accounting for variation in bark thickness across tree species underestimated carbon losses in forests by ~50%, totaling 0.22 PgC across the Cerrado region. The lower bark thicknesses of plant species in forests decreased fire tolerance to such an extent that a third of carbon gains during forest encroachment may be at risk of dieback if burned. These results illustrate that consideration of trait-based differences in fire tolerance is critical for determining the climate-carbon-fire feedback in tropical savanna and forest biomes. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61452
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology and Evolutionary Biology, Princeton University, 106A Guyot Hall, Princeton, NJ, United States; Department of Botany, Universidade de Brasília, Brasília, Brazil; Department of Plant and Microbial Biology, North Carolina State University, Raleigh, NC, United States
Recommended Citation:
Pellegrini A.F.A.,Franco A.C.,Hoffmann W.A.. Shifts in functional traits elevate risk of fire-driven tree dieback in tropical savanna and forest biomes[J]. Global Change Biology,2016-01-01,22(3)