Soil respiration patterns and rates at three Taiwanese forest plantations: dependence on elevation, temperature, precipitation, and litterfall

Botanical Studies

Table 2 Estimated parameters of a, b, and c; coefficients of determinations (R²); root mean squared error (RMSE); and temperature sensitivity (Q₁₀) of regressions for modeling soil respiration at TN, TC, and NT plantations in Taiwan

Model	a	b	c	R²	RMSE	Q₁₀	a	b	c	R²	RMSE	Q₁₀
	TN1						TN2
Temperature	0.592	0.089		0.430	1.965	2.44	0.269	0.120		0.605	1.920	3.31
Water content	1.709	0.246	− 0.003	0.654	1.648		0.053	0.870	− 0.022	0.824	1.400
Temperature and water content	0.862	0.033	0.349	0.705	1.529	1.39	0.657	0.053	0.371	0.847	1.310	1.70
	TC1						TC2
Temperature	0.333	0.106		0.611	1.182	2.88	0.374	0.103		0.573	1.359	2.80
Water content	1.073	0.095	0.032	0.565	1.290		0.971	0.214	0.013	0.523	1.506
Temperature and water content	0.181	0.070	0.738	0.843	0.783	2.01	0.051	0.099	1.133	0.669	1.255	2.69
	NT1						NT2
Temperature	0.573	0.086		0.676	0.444	2.37	1.347	0.036		0.100	0.826	1.44
Water content	3.864	− 0.138	0.002	0.336	0.663		4.057	− 0.104	0.001	0.085	0.865
Temperature and water content	0.744	0.128	− 0.289	0.755	0.402	3.60	3.030	0.116	− 0.652	0.453	0.668	3.19
	NT3
Temperature	1.394	0.055		0.721	0.376	1.74
Water content	4.049	− 0.086	0.003	0.278	0.631
Temperature and water content	1.515	0.065	− 0.086	0.748	0.373	1.92

Italic text represents the best model with the highest R² and lowest RMSE, which was used for estimating annual soil respiration rates