Net landscape carbon balance of a tropical savanna: Relative importance of fire and aquatic export in offsetting terrestrial production.

Global Change Biology
Clément DuvertJonathan G Wynn

Abstract

The magnitude of the terrestrial carbon (C) sink may be overestimated globally due to the difficulty of accounting for all C losses across heterogeneous landscapes. More complete assessments of net landscape C balances (NLCB) are needed that integrate both emissions by fire and transfer to aquatic systems, two key loss pathways of terrestrial C. These pathways can be particularly significant in the wet-dry tropics, where fire plays a fundamental part in ecosystems and where intense rainfall and seasonal flooding can result in considerable aquatic C export (ΣFaq ). Here, we determined the NLCB of a lowland catchment (~140 km2 ) in tropical Australia over 2 years by evaluating net terrestrial productivity (NEP), fire-related C emissions and ΣFaq (comprising both downstream transport and gaseous evasion) for the two main landscape components, that is, savanna woodland and seasonal wetlands. We found that the catchment was a large C sink (NLCB 334 Mg C km-2  year-1 ), and that savanna and wetland areas contributed 84% and 16% to this sink, respectively. Annually, fire emissions (-56 Mg C km-2  year-1 ) and ΣFaq (-28 Mg C km-2  year-1 ) reduced NEP by 13% and 7%, respectively. Savanna burning shifted the catchment to a net C source ...Continue Reading

References

Aug 28, 2003·Oecologia·Xiaoyong ChenDerek Eamus
Feb 14, 2012·Rapid Communications in Mass Spectrometry : RCM·Adrian M BassChristopher M Wurster
Jun 15, 2012·Environmental Science & Technology·Isaac R SantosBradley D Eyre
Nov 22, 2013·Nature·Peter A RaymondPeter Guth
Dec 18, 2013·Nature·Gwenaël AbrilFabio Roland
Jul 22, 2014·Global Change Biology·Jason BeringerPetteri Uotila
Dec 25, 2015·Proceedings of the National Academy of Sciences of the United States of America·David ButmanRobert G Striegl
Jun 9, 2016·The Science of the Total Environment·Mirko KaranTim Wardlaw
Oct 3, 2018·Global Change Biology·Brett P MurphyDavid M J S Bowman
Oct 31, 2018·Scientific Data·Hylke E BeckEric F Wood
May 21, 2019·Hydrology and Earth System Sciences·Yu-Ting ShihJr-Chuan Huang
May 24, 2019·Environmental Science & Technology·Damien T MaherLuke C Jeffrey

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