DOI: 10.1111/gcb.12222
论文题名: Tropospheric ozone reduces carbon assimilation in trees: Estimates from analysis of continuous flux measurements
作者: Fares S. ; Vargas R. ; Detto M. ; Goldstein A.H. ; Karlik J. ; Paoletti E. ; Vitale M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 8 起始页码: 2427
结束页码: 2443
语种: 英语
英文关键词: Citrus
; Gross primary productivity
; Mediterranean forest
; Ozone concentration
; Ozone damage
; Pinus ponderosa
; Stomatal deposition
Scopus关键词: carbon
; ozone
; carbon
; concentration (composition)
; coniferous tree
; evergreen tree
; flux measurement
; Granger causality test
; Mediterranean environment
; ozone
; physiological response
; stomatal conductance
; time series analysis
; troposphere
; air pollutant
; article
; atmosphere
; Citrus
; drug effect
; ecosystem
; gross primary productivity
; Italy
; Mediterranean forest
; metabolism
; ozone concentration
; ozone damage
; plant leaf
; plant stoma
; ponderosa pine
; regression analysis
; season
; stomatal deposition
; tree
; United States
; wavelet analysis
; citrus
; gross primary productivity
; Mediterranean forest
; ozone concentration
; ozone damage
; Pinus ponderosa
; stomatal deposition
; Air Pollutants
; Atmosphere
; California
; Carbon
; Ecosystem
; Italy
; Ozone
; Plant Leaves
; Plant Stomata
; Regression Analysis
; Seasons
; Trees
; Wavelet Analysis
; California
; Central Valley [California]
; United States
; Citrus
; Citrus sinensis
; Pinus ponderosa
; Quercus
英文摘要: High ground-level ozone concentrations are typical of Mediterranean climates. Plant exposure to this oxidant is known to reduce carbon assimilation. Ozone damage has been traditionally measured through manipulative experiments that do not consider long-term exposure and propagate large uncertainty by up-scaling leaf-level observations to ecosystem-level interpretations. We analyzed long-term continuous measurements (>9 site-years at 30 min resolution) of environmental and eco-physiological parameters at three Mediterranean ecosystems: (i) forest site dominated by Pinus ponderosa in the Sierra Mountains in California, USA; (ii) forest site composed of a mixture of Quercus spp. and P. pinea in the Tyrrhenian sea coast near Rome, Italy; and (iii) orchard site of Citrus sinensis cultivated in the California Central Valley, USA. We hypothesized that higher levels of ozone concentration in the atmosphere result in a decrease in carbon assimilation by trees under field conditions. This hypothesis was tested using time series analysis such as wavelet coherence and spectral Granger causality, and complemented with multivariate linear and nonlinear statistical analyses. We found that reduction in carbon assimilation was more related to stomatal ozone deposition than to ozone concentration. The negative effects of ozone occurred within a day of exposure/uptake. Decoupling between carbon assimilation and stomatal aperture increased with the amount of ozone pollution. Up to 12-19% of the carbon assimilation reduction in P. ponderosa and in the Citrus plantation was explained by higher stomatal ozone deposition. In contrast, the Italian site did not show reductions in gross primary productivity either by ozone concentration or stomatal ozone deposition, mainly due to the lower ozone concentrations in the periurban site over the shorter period of investigation. These results highlight the importance of plant adaptation/sensitivity under field conditions, and the importance of continuous long-term measurements to explain ozone damage to real-world forests and calculate metrics for ozone-risk assessment. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62380
Appears in Collections: 影响、适应和脆弱性
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作者单位: Consiglio per la Ricerca e la sperimentazione in Agricoltura (CRA), Research Centre for the Soil-Plant System, Via della Navicella 2-4, 00184 Rome, Italy; Department of Plant and Soil Sciences, Delaware Environmental Institute, University of Delaware, Newark, DE 19716, United States; Smithsonian Tropical Research Institute, MRC0580-06, Unit 9100 Box 0948, DPO, AA 34002-9998, United States; Department of Environmental Science, Policy, and Management, University of California, Berkeley, 137 Mulford Hall, Berkeley, CA 94720, United States; Cooperative Extension Kern County, 1031 South Mount Vernon Avenue, Bakersfield, CA 93307, United States; National Research Council, Institute for Plant Protection, Via Madonna del Piano 10, Sesto Fiorentino (Florence) 50019, Italy; Department of Environmental Biology, Sapienza University of Rome, Piazzale Aldo Moro 5, Rome 00185, Italy
Recommended Citation:
Fares S.,Vargas R.,Detto M.,et al. Tropospheric ozone reduces carbon assimilation in trees: Estimates from analysis of continuous flux measurements[J]. Global Change Biology,2013-01-01,19(8)