Gondwana Link

Cutting trees up so we can plant some more

Posted by: Keith Bradby

Published: 30/03/2007

Less wood (and carbon) is held in the root mass than expected. Photo Luke Barrett

Work is moving ahead to produce hard numbers for the tonnage of carbon sequestered by native bush across Gondwana Link. Justin Jonson is developing allometric equations for a number of key eucalypt species, which involves weighing the entire root, stem, branch and foliage biomass of a number of key eucalypts. This Eucalyptus occidentalis (yate) trunk gives some idea of the scale and labour intensity of this work (the tree was one of many still being cleared across the area). The Nature Conservancy is funding the work.

No living trees were harmed during the production of these allometrics.

(The allometric equation is an equation that represents the relationship between tree size (and carbon held) and tree age. This equation is different for each species as species have different growth rates).

Justin working his way through the large trunks being cut and weighed. Photo Luke Barrett
All parts of the trees are seperated and weighed, with samples dried in an Albany laboratory. Photo Luke Barrett
They were huge working days, with some of the last logs being wrestled onto the field scales late into the night Photo Luke Barrett
Justin Jonson recording carbon data. Photo Luke Barrett

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