DOI: 10.1111/gcb.12528
论文题名: Chronic water stress reduces tree growth and the carbon sink of deciduous hardwood forests
作者: Brzostek E.R. ; Dragoni D. ; Schmid H.P. ; Rahman A.F. ; Sims D. ; Wayson C.A. ; Johnson D.J. ; Phillips R.P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 8 起始页码: 2531
结束页码: 2539
语种: 英语
英文关键词: Carbon storage
; Deciduous hardwood forests
; Phenology
; Tree growth
; Water stress
Scopus关键词: biome
; broad-leaved forest
; carbon emission
; carbon sequestration
; carbon sink
; deciduous forest
; deciduous tree
; drought
; global change
; global warming
; growth rate
; mortality
; nitrogen
; phenology
; physiology
; soil moisture
; temperate forest
; water availability
; water stress
; United States
; soil
; water
; angiosperm
; carbon sequestration
; chemistry
; forest
; growth, development and aging
; physiological stress
; soil
; tree
; United States
; Angiosperms
; Carbon Sequestration
; Forests
; Indiana
; Soil
; Stress, Physiological
; Trees
; Water
英文摘要: Predicted decreases in water availability across the temperate forest biome have the potential to offset gains in carbon (C) uptake from phenology trends, rising atmospheric CO2, and nitrogen deposition. While it is well established that severe droughts reduce the C sink of forests by inducing tree mortality, the impacts of mild but chronic water stress on forest phenology and physiology are largely unknown. We quantified the C consequences of chronic water stress using a 13-year record of tree growth (n = 200 trees), soil moisture, and ecosystem C balance at the Morgan-Monroe State Forest (MMSF) in Indiana, and a regional 11-year record of tree growth (n > 300 000 trees) and water availability for the 20 most dominant deciduous broadleaf tree species across the eastern and midwestern USA. We show that despite ~26 more days of C assimilation by trees at the MMSF, increasing water stress decreased the number of days of wood production by ~42 days over the same period, reducing the annual accrual of C in woody biomass by 41%. Across the deciduous forest region, water stress induced similar declines in tree growth, particularly for water-demanding 'mesophytic' tree species. Given the current replacement of water-stress adapted 'xerophytic' tree species by mesophytic tree species, we estimate that chronic water stress has the potential to decrease the C sink of deciduous forests by up to 17% (0.04 Pg C yr-1) in the coming decades. This reduction in the C sink due to mesophication and chronic water stress is equivalent to an additional 1-3 days of global C emissions from fossil fuel burning each year. Collectively, our results indicate that regional declines in water availability may offset the growth-enhancing effects of other global changes and reduce the extent to which forests ameliorate climate warming. © 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/62179
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biology, Indiana University, Bloomington, IN, 47405, United States; Department of Geography, Indiana University, Bloomington, IN, 47405, United States; Karlsruhe Institute of Technology, IMK-IFU, Garmisch-Partenkirchen, 82467, Germany; USDA Forest Service - SilvaCarbon, Lima, 15001, Peru
Recommended Citation:
Brzostek E.R.,Dragoni D.,Schmid H.P.,et al. Chronic water stress reduces tree growth and the carbon sink of deciduous hardwood forests[J]. Global Change Biology,2014-01-01,20(8)