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The Importance of Termites to the CH4 Balance of a Tropical Savanna Woodland of Northern Australia

Jamali, Hizbullah, Livesley, Stephen J., Grover, Samantha. P., Dawes, Tracy Z., Hutley, Lindsay B., Cook, Garry D. and Arndt, Stefan K. (2011). The Importance of Termites to the CH<sub>4</sub> Balance of a Tropical Savanna Woodland of Northern Australia. Ecosystems,14(5):698-709.

Document type: Journal Article

IRMA ID 82057923xPUB103
Title The Importance of Termites to the CH4 Balance of a Tropical Savanna Woodland of Northern Australia
Author Jamali, Hizbullah
Livesley, Stephen J.
Grover, Samantha. P.
Dawes, Tracy Z.
Hutley, Lindsay B.
Cook, Garry D.
Arndt, Stefan K.
Journal Name Ecosystems
Publication Date 2011
Volume Number 14
Issue Number 5
ISSN 1432-9840   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-79960294723
Start Page 698
End Page 709
Total Pages 12
Place of Publication New York
Publisher Springer New York LLC
HERDC Category C1 - Journal Article (DIISR)
Abstract Termites produce methane (CH4) as a by-product of microbial metabolism of food in their hindguts, and are one of the most uncertain components of the regional and global CH4 exchange estimates. This study was conducted at Howard Springs near Darwin, and presents the first estimate of CH4 emissions from termites based on replicated in situ seasonal flux measurements in Australian savannas. Using measured fluxes of CH4 between termite mounds and the atmosphere, and between soil and the atmosphere across seasons we determined net CH4 flux within a tropical savanna woodland of northern Australia. By accounting for both mound-building and subterranean termite colony types, and estimating the contribution from tree-dwelling colonies it was calculated that termites were a CH4 source of +0.24 kg CH4-C ha -1 y -1 and soils were a CH4 sink of -1.14 kg CH4-C ha -1 y -1. Termites offset 21% of CH4 consumed by soil resulting in net sink strength of -0.90 kg CH4-C ha -1 y -1 for these savannas. For Microcerotermes nervosus (Hill), the most abundant mound-building termite species at this site, mound basal area explained 48% of the variation in mound CH4 flux. CH4 emissions from termites offset 0.1% of the net biome productivity (NBP) and CH4 consumption by soil adds 0.5% to the NBP of these tropical savannas at Howard Springs.
Keywords hypogeal termites
microcerotermes nervosu
soil methane oxidation
subterranean termites
termite mounds
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Created: Fri, 17 Jan 2014, 00:46:02 CST