Table 2.

Analysis of parameter estimates for multivariate probit analysis of the effects of temperature and latitude on survival of stems of plains cottonwood (187 individuals) and saltcedar (192 individuals) on April 17, 2006

Species	Parameter	Estimate	Standard error	Confidence limits (95%)		χ2	Probability
Cottonwood	Intercept	0.96	0.788	−0.58	2.51	1.5	0.22
	Temperature	0.18	0.013	0.15	0.20	204.6	<0.0001
	Latitude	−0.13	0.021	−0.17	−0.09	37.6	<0.0001
Saltcedar	Intercept	0.44	0.563	−0.66	1.55	0.6	0.43
	Temperature	0.13	0.008	0.11	0.14	290.3	<0.0001
	Latitude	−0.11	0.015	−0.14	−0.08	51.2	<0.0001

Numbers of individuals by species and latitude are shown in Table 1.