Plant Richness-Biomass Relationships in Restored Northern Great Plains Grasslands (USA)

Table 2

Field 1: stepwise regression relating peak biomass to the weighted (by biomass) plant parameters associated with the various species composition treatments. The parameter definitions are shown in Table 1. Note: the coefficient values represent the relative importance of each variables since they were all standardized to the 0-1 range before use.

High N treatment (𝑟^2=0.14, 𝑃<.0001)				Low N treatment (𝑟^2=0.21, 𝑃<.0001)
Variables	Coefficient	SE	P	Variables	Coefficient	SE	P
Imax-N	438.4	78.7	.0001	NUE	439.9	92.0	.0001
NUE	237.7	45.6	.0001	RGR	254.0	101.4	.0126
ρ	200.9	85.5	.0192	ρ	133.4	42.3	.0017
				PUE	−348.4	81.0	.0001
				R : S	−177.7	74.9	.0181
P treatment (𝑟^2=0.23, 𝑃<.0001)
Variables		Coefficient		SE			P
RGR		713.5		74.7			.0001
Imax-P		562.4		91.1			.0001
NUE		533.9		68.5			.0001
δ		414.5		61.7			.0001
Imax-N		−508.7		105.0			.0001
PUE		−373.4		61.8			.0001
β		−196.7		41.9			.0001
τ		−190.1		56.5			.0008
ρ		−157.8		41.9			.0002
R : S		−127.2		41.7			.0023