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Effects of fire and CO2 on biogeography and primary production in glacial and modern climates

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MS_NewPhyt_03052015_corrected.docxAccepted version190.27 kBMicrosoft WordView/Open
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table2.epsAccepted version804.4 kBPostscriptView/Open
Title: Effects of fire and CO2 on biogeography and primary production in glacial and modern climates
Authors: Calvo, MM
Prentice, IC
Item Type: Journal Article
Abstract: Dynamic global vegetation models (DGVMs) can disentangle causes and effects in the control of vegetation and fire. We used a DGVM to analyse climate, CO2 and fire influences on biome distribution and net primary production (NPP) in last glacial maximum (LGM) and pre-industrial (PI) times. The Land surface Processes and eXchanges (LPX) DGVM was run in a factorial design with fire ‘off’ or ‘on’, CO2 at LGM (185 ppm) or PI (280 ppm) concentrations, and LGM (modelled) or recent climates. Results were analysed by Stein–Alpert decomposition to separate primary effects from synergies. Fire removal causes forests to expand and global NPP to increase slightly. Low CO2 greatly reduces forest area (dramatically in a PI climate; realistically under an LGM climate) and global NPP. NPP under an LGM climate was reduced by a quarter as a result of low CO2. The reduction in global NPP was smaller at low temperatures, but greater in the presence of fire. Global NPP is controlled by climate and CO2 directly through photosynthesis, but also through biome distribution, which is strongly influenced by fire. Future vegetation simulations will need to consider the coupled responses of vegetation and fire to CO2 and climate.
Issue Date: 29-May-2015
Date of Acceptance: 30-Apr-2015
URI: http://hdl.handle.net/10044/1/56840
DOI: https://dx.doi.org/10.1111/nph.13485
ISSN: 0028-646X
Publisher: Wiley
Start Page: 987
End Page: 994
Journal / Book Title: New Phytologist
Volume: 208
Issue: 3
Copyright Statement: This is the peer reviewed version of the following article: Martin Calvo, M. and Prentice, I. C. (2015), Effects of fire and CO2 on biogeography and primary production in glacial and modern climates. New Phytol, 208: 987–994. , which has been published in final form at https://dx.doi.org/10.1111/nph.13485.  This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Sponsor/Funder: Commission of the European Communities
AXA Research Fund
Funder's Grant Number: 238366
AXA Chair Programme in Biosphere and Climate Impacts
Keywords: Science & Technology
Life Sciences & Biomedicine
Plant Sciences
biomass burning
climate change
CO2 fertilization
fire
fire-climate-CO2 interactions
fuel
primary production
vegetation distribution
GLOBAL VEGETATION MODELS
CARBON-CYCLE FEEDBACKS
LOW ATMOSPHERIC CO2
GROWTH-RESPONSES
EARTH SYSTEM
TEMPERATURE
EMISSIONS
FUTURE
DISTRIBUTIONS
SIMULATIONS
Carbon Dioxide
Climate Change
Ecosystem
Fires
Ice Cover
Models, Theoretical
06 Biological Sciences
07 Agricultural And Veterinary Sciences
Plant Biology & Botany
Publication Status: Published
Appears in Collections:Faculty of Natural Sciences
Department of Life Sciences
Grantham Institute for Climate Change