Table 5.

Predictions of bending moment at the point of failure from tree morphometric data and wood strength (MOR) for all trees, stem failures, and codominant failures.

Variable^{^z}		All failures				Stem failures				Codominant failures
Variable^{^z}		n	Estimate (SE)	P	RMSE/R²	n	Estimate (SE)	P	RMSE/R²	n	Estimate (SE)	P	RMSE/R²
	B^{^y}	21	169 (77.8)	0.0430	95.0/0.01	10	162 (207)	0.4567	110/0.01	11	210 (83.5)	0.0328	84.2/0.05
MOR (kPa)	β^{^y}		−0.0004 (0.0011)	0.7013			−0.0007 (0.0033)	0.8386			−0.0007 (0.0011)	0.5300
Tree height (m)	B	23	75.6 (70.2)	0.2936	97.2/0.02	11	14.5 (111)	0.8989	104/0.08	12	121 (96.7)	0.2404	96.5/0.00
	β		2.65 (3.91)	0.5056			5.29 (5.93)	0.3954			0.6607 (5.64)	0.9091
	B	24	−53.2 (66.6)	0.4334	84.2/0.26	11	−156 (93.7)	0.1309	78.0/0.49	13	21.9 (104)	0.8373	89.5/0.11
dbh (m)	β		280 (101)	0.0113			464 (158)	0.0169			168 (148)	0.2789
Crown height (m)	B	16	−22.6 (141)	0.8751	90.5/0.06	9	−26.2 (204)	0.9012	115/0.07	7	−73.83 (230)	0.7616	64.8/0.11
Crown height (m)	β		8.82 (9.07)	0.3468			9.69 (13.5)	0.4973			11.3 (14.2)	0.4634
Crown width (m)	B	13	42.0 (90.8)	0.6527	87.8/0.09	7	−79.4 (190)	0.6934	109/0.22	6	134 (85.4)	0.1926	62.1/0.01
	β		6.27 (5.99)	0.3176			13.9 (11.6)	0.2831			−0.8982 (6.27)	0.8931
	B	23	172 (60.1)	0.0092	96.4/0.04	11	263 (137)	0.087	102/0.13	12	146 (67.8)	0.0563	96.3/0.01
Slenderness	β		−1.74 (1.92)	0.3753			−4.81 (4.18)	0.2804			−0.5386 (2.26)	0.8165
Stem volume (m³)	B	23	26.5 (36.9)	0.4794	83.0/0.29	11	16.6 (46.4)	0.7288	84.9/0.39	12	38.3 (70.8)	0.6004	88.2/0.17
	β		13.5 (4.63)	0.0085			13.5 (5.60)	0.0392			13.0 (9.24)	0.1881
	B	24	56.9 (28.9)	0.0617	83.1/0.28	11	3.42 (36.1)	0.9266	69.5/0.59	13	86.0 (45.0)	0.0827	87.6/0.14
dbh³ (m³)	β		217 (75.1)	0.0084			470 (130)	0.0056			134 (98.6)	0.2026

↵^zdbh = diameter at breast height; slenderness = tree height/dbh; stem volume = tree height*(dbh)².
↵^yB, β = intercept and slope, respectively, of best fit line for the plot of bending moment at the point of failure and the variable listed in the first column.
SE = standard error; RMSE = root mean square error.