Understanding the Spatial Heterogeneity of CO₂ and CH₄ Fluxes from an Urban Shallow Lake: Correlations with Environmental Factors

Table 4

Model summary.

Dependent variable	Model	R	R square	Adjusted R square	Std. error of the estimate	Change statistics					Durbin-Watson
						R square change	F change	df1	df2	Sig. F change
lg CO2	1		0.550	0.522	0.4679	0.550	19.592	1	16	0.000
	2		0.783	0.754	0.3358	0.232	16.067	1	15	0.001
	3			0.802	0.3015	0.054	4.611	1	14	0.050	1.659
lg CH4	1		0.602	0.577	0.4847	0.602	24.187	1	16	0.000
	2		0.724	0.688	0.4164	0.123	6.672	1	15	0.021	2.859

Predictors: (constant) T; predictors: (constant) T, OM; predictors: (constant) T, OM, pH; predictors: (constant) Tur; predictors: (constant) Tur, N-; the bold numerical values are the optimal solution.