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Table 3 Estimates of carbon stocks based on 1046 plots measured in pre-1990 natural forest. Estimates are shown for all forests, and for tall forest and regenerating forest based on species composition. Plus-or-minus values are estimated 95% confidence intervals calculated using two methods; the first method is based solely on sampling variation between plots (CIs); and the second method combines the effects of sampling variation and prediction uncertainty (CIs&p)

From: Natural forests in New Zealand – a large terrestrial carbon pool in a national state of equilibrium

Forest groupa Pool Stocks in 2002–2007 Stocks in 2009–2014
tC·ha−1 CIs CIs&p tC·ha−1 CIs CIs&p
All plots
(N = 1046)
AGB 134.4 ± 5.2 ± 8.0 134.6 ± 5.3 ± 8.0
BGB 31.5 ± 1.2 ± 2.0 31.6 ± 1.3 ± 2.0
Dead wood 40.7 ± 2.7 ± 10.8 40.7 ± 2.6 ± 10.8
Litterb 20.3 ± 3.6 ± 3.6 20.3 ± 3.6 ± 3.6
All pools 227.0 ± 8.9 ± 14.4 227.2 ± 9.0 ± 14.5
Tall forest
(N = 912)
AGB 148.8 ± 5.3 ± 8.5 148.8 ± 5.4 ± 8.6
BGB 34.9 ± 1.3 ± 2.1 34.9 ± 1.3 ± 2.1
Dead wood 46.0 ± 2.9 ± 12.1 46.0 ± 2.8 ± 12.1
Litterb 22.7 ± 4.1 ± 4.2 22.7 ± 4.1 ± 4.2
All pools 252.4 ± 9 ± 15.5 252.4 ± 9 ± 15.5
Regenerating forest
(N = 132)
AGB 34.7 ± 6.5 ± 6.7 37.9 ± 7.2 ± 7.4
BGB 8.3 ± 1.5 ± 1.6 9.0 ± 1.7 ± 1.8
Dead wood 4.3 ± 2.0 ± 2.3 4.9 ± 2.3 ± 2.6
Litterb 6.3 ± 1.7 ± 1.7 6.3 ± 1.7 ± 1.7
All pools 53.6 ± 9.0 ± 9.4 58.1 ± 10.1 ± 10.5
  1. aNote that two grid locations were not classified into a forest group;
  2. bLitter was only measured in 2002–2007 and was assumed to be unchanged in 2009–2014