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dc.contributor.authorKirschbaum, Miko UF
dc.contributor.authorKeith, Heather
dc.contributor.authorLeuning, Ray
dc.contributor.authorCleugh, Helen A
dc.contributor.authorJacobsen, Kris L
dc.contributor.authorvan Gorsel, Eva
dc.contributor.authorRaison, R John
dc.date.accessioned2021-09-16T01:54:43Z
dc.date.available2021-09-16T01:54:43Z
dc.date.issued2007
dc.identifier.issn0168-1923en_US
dc.identifier.doi10.1016/j.agrformet.2007.04.002en_US
dc.identifier.urihttp://hdl.handle.net/10072/408035
dc.description.abstractThis study examined the carbon budget of a Eucalyptus delegatensis forest over four years under contrasting weather conditions by using a comprehensive forest-growth model (CenW 3.1). Model parameterisation was constrained through multiple measurements, including daytime eddy flux measurements of CO2 and water vapour exchange, estimates of above- and below-ground biomass pools, growth rates measured through stem-diameter increments and measurement of specific ecosystem processes, such as litter fall and soil respiration rates. The resultant estimates of net ecosystem exchange ranged from an uptake of 4.0 t C ha−1 year−1 in a year with adequate rainfall to a loss of 0.4 t C ha−1 year−1 in a year affected by drought and insect damage. The simulations indicated that this reduction in carbon gain was primarily due to insect damage rather than a direct consequence of water shortage. Under good growing conditions, carbon gain accumulated equally in stem wood and other biomass pools while soil organic carbon and woody litter were gradually decreasing following harvesting that had occurred 20 years earlier. Under more stressful conditions, net biomass increments decreased, while soil organic carbon and woody litter increased because of greater litter inputs and because drier conditions inhibited decomposition. Modelled estimates of photosynthesis and net ecosystem exchange were similar to estimates from eddy flux observations alone provided that it used a novel routine for deriving night-time carbon fluxes. Estimates of net ecosystem exchange derived in the present work were, however, substantially lower than previous estimates that had been derived using a more traditional analysis of eddy flux data. This study showed that detailed physiological modelling is a valuable technique for combining all available site information as well as further constraints based on broader scientific principles and considerations of the conservation of mass. It can thus provide a powerful constraint on the overall site carbon budget of an ecosystem.en_US
dc.languageenen_US
dc.publisherElsevier BVen_US
dc.relation.ispartofpagefrom48en_US
dc.relation.ispartofpageto68en_US
dc.relation.ispartofissue1-2en_US
dc.relation.ispartofjournalAgricultural and Forest Meteorologyen_US
dc.relation.ispartofvolume145en_US
dc.titleModelling net ecosystem carbon and water exchange of a temperate Eucalyptus delegatensis forest using multiple constraintsen_US
dc.typeJournal articleen_US
dcterms.bibliographicCitationKirschbaum, MUF; Keith, H; Leuning, R; Cleugh, HA; Jacobsen, KL; van Gorsel, E; Raison, RJ, Modelling net ecosystem carbon and water exchange of a temperate Eucalyptus delegatensis forest using multiple constraints, Agricultural and Forest Meteorology, 2007, 145 (1-2), pp. 48-68en_US
dc.date.updated2021-09-16T00:56:28Z
gro.hasfulltextNo Full Text
gro.griffith.authorKeith, Heather


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