A single founding female can repopulate a stream after drought wipes out its fish.

Evidence

A drop in heterozygosity from about 4.0% to 0.1 % requires a harmonic mean Ne of about 1.1 individuals per generation [Eq. (1)]. Even if there were several thousand P. monacha in the upper Platanos in 1978 following six generations of reproduction, the results are con­ sistent with colonization by a single pregnant female and a gradual population recovery. — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1727

Categorization

• CANDY: One pregnant female (carrying stored sperm from multiple males) restoring a whole population is a striking, tellable fact about disturbance recovery.