DOI: 10.1111/gcb.12962
论文题名: Does the growth response of woody plants to elevated CO2 increase with temperature? A model-oriented meta-analysis
作者: Baig S. ; Medlyn B.E. ; Mercado L.M. ; Zaehle S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 12 起始页码: 4303
结束页码: 4319
语种: 英语
英文关键词: Effect size
; Log response ratio
; Meta-analysis
; Meta-regression
; Photosynthesis
; Rubisco
Scopus关键词: air temperature
; carbon dioxide enrichment
; enzyme activity
; growth response
; meta-analysis
; photosynthesis
; reaction kinetics
; woody plant
; carbon dioxide
; biomass
; forest
; growth, development and aging
; meta analysis
; metabolism
; photosynthesis
; temperature
; theoretical model
; tree
; Biomass
; Carbon Dioxide
; Forests
; Models, Theoretical
; Photosynthesis
; Temperature
; Trees
英文摘要: The temperature dependence of the reaction kinetics of the Rubisco enzyme implies that, at the level of a chloroplast, the response of photosynthesis to rising atmospheric CO2 concentration (Ca) will increase with increasing air temperature. Vegetation models incorporating this interaction predict that the response of net primary productivity (NPP) to elevated CO2 (eCa) will increase with rising temperature and will be substantially larger in warm tropical forests than in cold boreal forests. We tested these model predictions against evidence from eCa experiments by carrying out two meta-analyses. Firstly, we tested for an interaction effect on growth responses in factorial eCa × temperature experiments. This analysis showed a positive, but nonsignificant interaction effect (95% CI for above-ground biomass response = -0.8, 18.0%) between eCa and temperature. Secondly, we tested field-based eCa experiments on woody plants across the globe for a relationship between the eCa effect on plant biomass and mean annual temperature (MAT). This second analysis showed a positive but nonsignificant correlation between the eCa response and MAT. The magnitude of the interactions between CO2 and temperature found in both meta-analyses were consistent with model predictions, even though both analyses gave nonsignificant results. Thus, we conclude that it is not possible to distinguish between the competing hypotheses of no interaction vs. an interaction based on Rubisco kinetics from the available experimental database. Experiments in a wider range of temperature zones are required. Until such experimental data are available, model predictions should aim to incorporate uncertainty about this interaction. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61803
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Department of Biological Sciences, Macquarie University, North Ryde, NSW, Australia; Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, NSW, Australia; Geography Department, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; Centre for Ecology and Hydrology, Wallingford, United Kingdom; Biogeochemical Integration Department, Max Planck Institute for Biogeochemistry, Hans-Knöll-Str. 10, Jena, Germany
Recommended Citation:
Baig S.,Medlyn B.E.,Mercado L.M.,et al. Does the growth response of woody plants to elevated CO2 increase with temperature? A model-oriented meta-analysis[J]. Global Change Biology,2015-01-01,21(12)