Table 1.

Predicted relationships between fragmentation-linked effects and eRIDE.

mechanism	summary statistic	predicted relationship with eRIDE
habitat loss	change in area	habitat area is directly proportional to eRIDE (equation (2.5))
division	number of patches	habitat division increases eRIDE for habitats with SAR values of z less than 0.5
dilution/amplification	d (equation (2.5))	a dilution effect with increased biodiversity amplifies the effect of division on eRIDE
isolation	connectivity	the proposed model does not directly measure isolation. Consequences of isolation on biodiversity will be scale-, and species-specific. It is assumed parameters of the SAR are determined, in part, due to patch isolation
perimeter effects	change in perimeter	habitat perimeter is directly proportional to eRIDE (equation (2.5))
core habitat	solidity	solidity is negatively correlated with eRIDE. True core habitat effects are independent of perimeter, area and eRIDE but only occur for dynamic habitats under special geometric scenarios