Long-term estimates of live above-ground tree carbon stocks and net change in managed uneven-aged mixed species forests of sub-tropical Queensland, Australia

Ngugi, Michael R., Doley, David, Botkin, Daniel B., Cant, Mark, Neldner, Victor J. and Kelley, Jack (2014) Long-term estimates of live above-ground tree carbon stocks and net change in managed uneven-aged mixed species forests of sub-tropical Queensland, Australia. Australian Forestry, 77 3-4: 189-202. doi:10.1080/00049158.2014.979979


Author Ngugi, Michael R.
Doley, David
Botkin, Daniel B.
Cant, Mark
Neldner, Victor J.
Kelley, Jack
Title Long-term estimates of live above-ground tree carbon stocks and net change in managed uneven-aged mixed species forests of sub-tropical Queensland, Australia
Journal name Australian Forestry   Check publisher's open access policy
ISSN 0004-9158
2325-6087
Publication date 2014
Year available 2014
Sub-type Article (original research)
DOI 10.1080/00049158.2014.979979
Open Access Status
Volume 77
Issue 3-4
Start page 189
End page 202
Total pages 14
Place of publication Melbourne VIC Australia
Publisher Taylor & Francis Australasia
Collection year 2015
Language eng
Formatted abstract
Estimates of carbon stocks and their annual change for extensive Australian sub-tropical forests are based on indirect estimates or on data derived from temperate forests. We estimated live above-ground tree carbon (LAC) stocks at landscape level from 355 000 measurements of 94 127 tree stems from 604 permanently monitored plots representing 2.6 million ha of managed uneven-aged mixed-species native forests in sub-tropical Queensland. These plots were established between 1936 and 1998 and re-measured every 2 to 10 years up to 2011. Landscapes were represented by 16 broad vegetation groups growing across a mean annual rainfall range of 500 to 2000 mm. Landscape-mean LAC stocks varied from 20.8 ± 4.3 t C ha−1 in inland eucalypt woodlands to 146.4 ± 11.1 t C ha−1 in coastal wet tall open forests. Landscape maximum LAC stock, defined as the mean of maximum LAC stocks over the entire measurement history for a specified landscape under prevailing environmental conditions and disturbance regimes, including sustainable forest management, ranged from 34.0 ± 7.2 t C ha−1 in inland eucalypt woodlands to 154.9 ± 19.4 t C ha−1 in coastal wet tall open forests. Annual live above-ground net carbon flux (C-flux) across all forests types ranged from 0.46 to 2.92 t C ha−1 y−1 with an overall mean of 0.95 t C ha−1 y−1 (n = 2067). Comparison of our results with Intergovernmental Panel on Climate Change (IPCC) estimates shows that in all cases, except for the sub-tropical steppe, the IPCC over-estimated stocks by between 13% and 34%. Conversely, the IPCC estimated C-fluxes were between 14% and 40% less than the Queensland estimates. These results extend statistically valid estimates of landscape LAC stocks and fluxes to the sub-tropical regions of Australia.
Keyword Carbon
Stocks
Climate change
Forests
Queensland
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Mined Land Rehabilitation Publications
Official 2015 Collection
 
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