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Table 1 Linear mixed-effects model analysis: the effects of topographic location and seasons on soil moisture, DOC, DON, NH4 +, NO3 − concentrations, net N mineralisation, and net N nitrification in O/A horizon

From: Great fraction of dissolved organic C and N in the primary per-humid Chamaecyparis forest soil

Effects

Soil moisture (g g−1)

DOC (mg C kg−1)

DON (mg N kg−1)

NH4 + (mg N kg−1)

NO3 − (mg N kg−1)

Net N mineralisation (mg N kg−1 wk−1)

Net N nitrification (mg N kg−1 wk−1)

Coeff.

SE

Coeff.

SE

Coeff.

SE

Coeff.

SE

Coeff.

SE

Coeff.

SE

Coeff.

SE

Location

 Summita

0

0

0

0

0

0

0

0

0

0

0

0

0

0

 Footslope

0.02*

0.01

NS

–

35.70*

16.78

NS

–

NS

–

NS

–

NS

–

 Lakeshore

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

Season

 Springa

0

0

0

0

0

0

0

0

0

0

0

0

0

0

 Summer

−0.03**

0.01

NS

–

NS

–

−24.20***

6.69

−3.62***

0.64

NS

–

NS

–

 Autumn

NS

–

NS

–

−42.58*

17.11

NS

–

−1.65*

0.65

NS

–

NS

–

 Winter

NS

–

NS

–

38.04*

16.07

NS

–

−2.60***

0.61

45.83*

20.45

NS

–

Interaction

 Footslope × Summer

NS

–

NS

–

NS

–

24.63**

9.46

2.50**

0.91

NS

–

NS

–

 Lakeshore × Summer

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

 Footslope × Autumn

NS

–

NS

–

NS

–

31.67***

9.34

2.02*

0.90

NS

–

NS

–

 Lakeshore × Autumn

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

 Footslope × Winter

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

NS

–

 Lakeshore × Winter

NS

–

NS

–

−60.05**

22.86

NS

–

NS

–

NS

–

NS

–

  1. Coeff. and SE are the estimated coefficient and standard error of each independent variable in the model
  2. The + or − before the value of Coeff. indicates the higher or lower value than ‘Summit’ in location or ‘Spring’ in season
  3. *** p < 0.001, ** p < 0.01, * p < 0.05, NS not significant (p >  0.1)
  4. aSet to zero due to being the standard for comparison within each categorical factor