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Table 2 Description of the landscape fragmentation metrics that were included in the analyses of human seropositivity for E. granulosus and E. multilocularis in Xiji County

From: Environmental risk factors and changing spatial patterns of human seropositivity for Echinococcus spp. in Xiji County, Ningxia Hui Autonomous Region, China

Metric

Description

Units

Composition

 Number of patches (NumP)

Total number of patches within a buffer

–

 Patch density (PD)

Total number of patches per buffer area

/km2

 Mean patch size (MPS)

Average patch size within a buffer

km

Shape

 Mean shape index (MSI)

Ratio of perimeter to area adjusted by a constant to account for a particular patch shape

–

Configuration

 Edge density (ED)

Amount of edge relative to the buffer area

km/km2 (perimeter/area ratio)