Table 4. The change in the volume of coarse woody debris (CWD).

Survey	Evaluation statistics
	Estimated Mean (m3 ha−1)	± Standard error	Relative standard error (%)	Total (m3)
2009(5th)	4.71	± 0.25	5.26	6,324,037 ± 335,671
2014(6th)	4.09	± 0.25	6.14	5,486,036 ± 335,332
2019(7th)	3.09	± 0.19	6.12	4,129,226 ± 227,174