Variable retention in Tasmania, Australia: trends over 16 years of monitoring and adaptive management

Ecological Processes

Table 3 Mean differences in selected variables between paired ARN and CBS coupes harvested from 2003 to 2009, shown for comparison with recent results

Variable	ARN mean	CBS mean	Mean difference (ARN-CBS)	Test used	Test statistic	Number	p value
Coupes harvested from 2003 to 2009
Perimeter (m)	4642	2836	1806	Paired t	5.12	31	< .0001
Harvested area (ha)	20.7	28.5	− 7.7	Paired t	− 2.5	31	0.0175
Perimeter-to-area ratio (m ha⁻¹)	224	127	97.5	Wilcoxon	465	31	< .0001
Forest influence (%)	73	33	41	Paired t	8.66	31	< .0001
Retention (%)	30	0	30	Wilcoxon	378	31	< .0001
Burnt seedbed (%)	63	68	− 6	Paired t	− 2.04	31	0.025*
Stocking age 1 year (%)	69	69	− 0.5	Paired t	− 0.14	31	0.445
Density age 1 year (sph)	3633	3083	550	Wilcoxon	259	31	0.42

Means for each silvicultural system are shown as well as the mean difference between the paired coupes (ARN–CBS). Tests used, test statistics, and p values are shown, with significant difference indicated in italics. Reprinted from Scott et al. (2012b) and Scott et al. (2013), with permission from Elsevier, and from Scott et al. (2015), with permission from Taylor & Francis (https://www.tandfonline.com/)
*One-tailed p