Influence of an Ice Storm on Aboveground Biomass of Subtropical Evergreen Broadleaf Forest in Lechang, Nanling Mountains of Southern China

Table 5

Multiple stepwise regression of dead tree biomass (2011) at the stand level versus five stand characteristics in 2008 (X1: altitude; X2: slope angle; X3: slope aspect; X4: stand density; X5: AGB in 2008).

Regression model	𝑅^2	Change in 𝑅^2	Standard error	Significance F
𝑌=0.111104𝑋1−79.3955	0.697	0	5.861	0.019
𝑌=0.06866𝑋1+0.1338𝑋5−55.93	0.715	0.018	6.356	0.081
𝑌=−0.02456𝑋1+0.2815𝑋5−1.480𝑋2+51.23	0.912	0.197	4.077	0.043
𝑌=−0.03726𝑋1+0.2400𝑋5−1.934𝑋2−0.02596𝑋3+84.34	0.917	0.005	4.856	0.159
𝑌=−0.1417𝑋1+0.3162𝑋5−3.454𝑋2−0.01006𝑋3−0.003919𝑋4+228.7	0.975	0.058	3.789	0.267