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Table 4 Parameter estimation (standard errors) of the lowest AIC selected models (Eqs. 2 and 3) (.P < 0.1; *P < 0.05; **P < 0.001; ***P < 0.0001)

From: Density and diameter distributions of saplings in naturally regenerated and planted coniferous stands in Québec after various approaches of commercial thinning

Coefficient

Variable

Gsp

NSap

a0

(Intercept)

− 0.48845 (1.35998)

3.61036 (0.22359) ***

a1

Plantation

2.79436 (0.63838) ***

1.82702 (0.15695) ***

a2

Nmertot

 

0.00052 (0.00007) ***

a3

NmerGsp

0.04349 (0.01816) *

− 0.00114 (0.00008) ***

a4

BF

 

5.03580 (0.21258) ***

HW

 

− 0.09625 (0.22459)

a5

TrTElite

2.65729 (0.84447) **

− 0.45986 (0.02003) ***

TrTBF

1.93432 (1.49529)

− 0.17746 (0.02477) ***

TrT1/3

0.58476 (0.69565)

− 0.41517 (0.02289) ***

a6

DmeanGsp

− 0.08945 (0.07333)

− 0.06012 (0.01028) ***

a7

Dsdtot

 

0.12639 (0.00658) ***

a8

Dvartot

 

− 0.00279 (0.00026) ***

a9

NmerGsp x DmeanGsp

− 0.00204 (0.00094) *

 

a10

BF: Plantation

 

− 3.65932 (0.09966) ***

HW: Plantation

 

− 0.47707 (0.09063) ***

a11

NmerGsp: Plantation

 

0.00269 (0.00005) ***

a12

DmeanGsp: Plantation

 

0.01055 (0.00563) .

a13

Nmertot: Plantation

 

− 0.00087 (0.00005) ***

a14

Nmertot: NmerGsp

 

− 0.00000 (0.00000) ***

a15

NmerBF: BF

 

0.00106 (0.00006) ***

NmerHW: HW

 

0.01010 (0.00017) ***

a16

Nmertot: BF

 

0.00078 (0.00006) ***

Nmertot: HW

 

0.00012 (0.00007) .

a17

TrTElite: BF

 

0.59122 (0.02347) ***

TrTElite: HW

 

0.68170 (0.03408) ***

TrTBF: BF

 

− 1.05748 (0.06137) ***

TrTBF: HW

 

0.49664 (0.04041) ***

TrT1/3: BF

 

0.59518 (0.02748) ***

TrT1/3: HW

 

0.45887 (0.03806) ***

a18

DmeanBF: BF

 

− 0.14195 (0.01009) ***

DmeanVHW: HW

 

0.01972 (0.01056) .