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Table 2 Linear mixed effect model results of tree regeneration density and six environmental factors which were most strongly correlated with the first three PCs (see more in "Appendix": Table 11)

From: Tree regeneration characteristics in limestone forests of the Cat Ba National Park, Vietnam

Variables Value Standard Error df t-value p-value
Intercept 3819.32 992.92 81 3.847  < 0.001
L_TSF − 21.48 64.85 81 − 0.331 0.741
L_GF − 3.73 46.41 81 − 0.080 0.936
S_CEC − 38.19 106.73 81 − 0.358 0.721
T_RS − 9.02 5.68 81 − 1.587 0.116
S_clay − 20.11 15.63 81 − 1.286 0.202
S_silt 25.63 16.11 81 1.591 0.115
  1. Acronyms of variables are defined in Table 5. Given are the estimates (Value) and the respective standard error, the degrees of freedom (df), the t-value of each variable, and its significance (p-value). Significance was assumed with p < 0.05