Ah, the species-area relationship, the elegant log S = log c + z log A equation... it predicts more species in larger habitats, with the 'z' value telling us the slope, the rate of that increase. We used it like gospel to argue for preserving a fragmented forest patch near my town. But paper equations didn't account for the silent factor—that the "area" was crossed by new septic lines from a housing plot, poisoning the groundwater in the pond where my cranes drank. The models showed enough area, but the z-value meant nothing when the water itself turned toxic. We saved the map, but not the life.
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