Table 2. Overview of all weighted distance models.

Weighted distance models	Description
LGD*RNA	Linear geographic distance (LGD) weighted for the fraction of negative area (NA). RNA being the negative area relative to the total area (TA) in a strip of 200 m wide between two ponds. Adjusted with the habitat correction factor (HCF)
	RNA = (NA∗HCF + TA)∕TA
LGD*RPA	Linear geographic distance (LGD) weighted for the fraction of positive area (PA). RPA being the positive area relative to the total area (TA) in a strip of 200 m wide between two ponds. Adjusted with the habitat correction factor (HCF)
	RPA = TA∕(PA∗HCF + TA)
LGD*RNA*RPA	Combined weighted distance for positive and negative area.