A spatially-explicit count data regression for modeling the density of forest cockchafer (Melolontha hippocastani) larvae in the Hessian Ried (Germany)

Forest Ecosystems

Table 1 Distribution of larva density at 1 276 sample plots recorded in the larva density inventory and assigned covariates distance to water table ( DWT ) and clay thickness ( CTH)

Larvae per m²	0	1	2	3	4	5	6	7	8	9	10	>10
Number of sample points = 1276	664	100	82	62	56	53	33	28	23	27	13	148
Percentage (%)	52.0	7.8	6.4	4.9	4.4	4.2	2.6	2.2	1.8	2.1	1.0	11.0
	Min.		1 ^st Quartil		Median		Mean		3 ^rd Quartil		Max.
Distance to water table October 2007 (m)	0.29		3.24		5.20		7.56		11.45		35.16
Clay thickness (%)	0.0		0.0		0.0		2.9		0.0		100.0