Assessing the Population Status of a Tree Species Using Distance Sampling: Aquilaria crassna (Thymelaeaceae) in Northern Laos

Table 3

Coefficients of correlation between number of detections per 50 m track segment for different categories of objects. *, **, and *** signify statistical significance at 0.1, 0.05, and 0.01 levels, respectively.

	Site	Saplings	Standing trees DBH < 10 cm	Standing trees DBH ≥ 10 cm	All standing trees	Felled trees
Seedlings	1	0.21***	0.23**	0.01^NS	0.14^NS	0.56***
	2	0.45***	0.10^NS	−0.03^NS	0.09^NS	0.21**
	3	0.30***	0.07^NS	0.08^NS	0.07^NS	0.20**
	4	0.16*	0.08^NS	0.19**	0.12^NS	0.16*
Saplings	1		0.21**	0.24**	0.27***	0.34***
	2		0.13^NS	−0.04^NS	0.12^NS	0.39***
	3		0.34***	0.28***	0.34***	0.21**
	4		0.20**	0.16*	0.24**	0.10^NS
Standing trees DBH ≥ 10 cm	1	0.24**	0.35***		0.83***	0.08^NS
	2	−0.04^NS	0.05^NS		0.21**	−0.06^NS
	3	0.28***	0.84***		0.88***	0.33***
	4	0.16*	−0.07^NS		0.15*	−0.07^NS