Forest Ecosystems

Table 2 Descriptive data of inventory plots (USA)

From: Tree species richness enhances stand productivity while stand structure can have opposite effects, based on forest inventory data from Germany and the United States of America

	R	d	dq	CVd	SDI	Temp	Precip	P
mean	4.67	19.91	21.97	0.44	522.63	11.56	1055.95	6.22
sd	2.82	8.17	8.81	0.19	464.31	5.6	357.02	0.64
se	0	0.01	0.01	0	0.61	0.01	0.47	0
min	1	7.11	7.11	0	0.16	−2.88	56	4.01
max	21	169.93	169.93	1.9	4998.34	24.57	3353	8.02
n	576,415

R number of species, d diameter at breast height (cm), dq quadratic mean diameter (cm), CVd coefficient of variation of diameter, SDI stand density index, Temp mean annual temperature, Precip annual precipitation, P stand productivity (m³∙ha⁻¹∙yr.⁻¹)

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