Nutrient retention and release in coarse woody debris of three important central European tree species and the use of NIRS to determine deadwood chemical properties

Forest Ecosystems

Table 6 Linear mixed-effect models to predict the nutrient concentrations (% (C) and mg∙g⁻¹) of Fagus sylvatica, Picea abies and Pinus sylvestris

	C⁻²	lnN	sqrtP	logS	sqrtCa	lnK	lnMg	lnMn
Conditional R²	62.3	58	42	65.3	66.4	72	67.9	79.1
Marginal R²	49.4	52	32.1	65.3	66.3	61.8	57.6	32.4
Random factor	12.9	5.99	10	0	0.11	10.2	10.3	46.7
Decomptime	^{– – –}11.8	⁺⁺⁺ 14.7	^– –4.24	⁺⁺⁺ 22.6	⁺⁺⁺ 37.1	^– –8.03	⁺ 3.58	⁺⁺⁺ 14.9
Spec	^{– – –}35	^{– – –}16.2	^{– – –}12.6	^{– – –}8.03		^{– – –}32.4	^{– – –}19.4	⁺4.81
Diam	⁻2.54	^{– – –}7.02		^{– – –}14.9	^– –2.73		^– –8.04	⁻2.57
Decomptime:Spec		⁺⁺⁺ 14.1	⁺⁺⁺ 15.2	⁺⁺⁺ 19.8	^{– – –}26.4	⁺⁺⁺ 21.4	^{– – –}26.6	^{– – –}10.2

Values are Eta squared with direction of effect (increase (+) or decrease (−)) according to significance level (0: ‘***’, 0.001: ‘**’, 0.01: ‘*’ and 0.05: ‘.’)