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

Ecological Processes

Table 2 Mean differences in selected variables between paired ARN and CBS coupes harvested from 2010 to 2018

Variable	ARN mean	CBS mean	Mean difference (ARN-CBS)	Test used	Test statistic	Number	p value
Coupes harvested from 2010 to 2018
Perimeter (m)	4506	3691	815	Paired t	2.36	49	0.0226
Harvested area (ha)	25.8	38.8	− 13.1	Paired t	− 4.53	49	< .0001
Perimeter-to-area ratio (m ha⁻¹)	186	108	77.9	Paired t	9.9	49	< .0001
Forest influence (%)	63	32	31	Paired t	12.59	49	0.0035
Retention (%)	28	0	28	Wilcoxon	528	49	< .0001
Burnt seedbed (%)	63	79	− 17	Paired t	− 4.39	36	< .0001
Stocking age 1 year (%)	68	77	− 9	Paired t	− 2.71	35	0.0103
Density age 1 year (sph)	2063	2682	− 696	Paired t	− 2.58	34	0.0036

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 differences indicated in italics