Impacts of fire on sources of soil CO2 efflux in a dry Amazon rain forest

Global Change Biology
D B MetcalfeYadvinder Malhi

Abstract

Fire at the dry southern margin of the Amazon rainforest could have major consequences for regional soil carbon (C) storage and ecosystem carbon dioxide (CO2 ) emissions, but relatively little information exists about impacts of fire on soil C cycling within this sensitive ecotone. We measured CO2 effluxes from different soil components (ground surface litter, roots, mycorrhizae, soil organic matter) at a large-scale burn experiment designed to simulate a severe but realistic potential future scenario for the region (Fire plot) in Mato Grosso, Brazil, over 1 year, and compared these measurements to replicated data from a nearby, unmodified Control plot. After four burns over 5 years, soil CO2 efflux (Rs ) was ~5.5 t C ha-1  year-1 lower on the Fire plot compared to the Control. Most of the Fire plot Rs reduction was specifically due to lower ground surface litter and root respiration. Mycorrhizal respiration on both plots was around ~20% of Rs . Soil surface temperature appeared to be more important than moisture as a driver of seasonal patterns in Rs at the site. Regular fire events decreased the seasonality of Rs at the study site, due to apparent differences in environmental sensitivities among biotic and abiotic soil compon...Continue Reading

References

Mar 26, 2003·Tree Physiology·Weixin Cheng
Jan 27, 2007·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Mark B BushCarolyn Krisel
Dec 1, 2007·Science·Yadvinder MalhiCarlos A Nobre
Feb 13, 2008·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Daniel C NepstadFrank Merry
Jun 17, 2008·Annals of Botany·Owen K Atkin, David Macherel
Feb 12, 2009·Ambio·Mark A Cochrane, William F Laurance
Feb 17, 2009·Proceedings of the National Academy of Sciences of the United States of America·Yadvinder MalhiPatrick Meir
Mar 30, 2010·The New Phytologist·Andrew T NottinghamEdmund V J Tanner
Apr 16, 2014·Proceedings of the National Academy of Sciences of the United States of America·Paulo Monteiro BrandoBritaldo S Soares-Filho
Feb 3, 2015·Global Change Biology·Yadvinder MalhiOliver L Phillips
Oct 16, 2015·Proceedings of the National Academy of Sciences of the United States of America·Philip B DuffyChristopher B Field
Jun 1, 2017·Proceedings of the National Academy of Sciences of the United States of America·Christine V HawkesStephanie N Kivlin

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Citations

Feb 20, 2020·Scientific Reports·Laura BononiItamar Soares Melo
Nov 3, 2020·The Science of the Total Environment·Eric L Bullock, Curtis E Woodcock

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