Restricted dispersal alone can generate persistent patchy genetic variation even in large populations

Evidence

Specific models of migration make an enormous difference in the distribution pattern of genetic variation. In an elegant computer simulation study, Turner et al. (1982) showed that under restricted pollen and seed dispersal, patchy genetic varia­ tion developed quickly and persisted for many generations even in large popula­ tions. Heterozygosity was distributed at the edges of such patches. This study also showed gene frequency patchiness to be greater than predicted from dispersal mod­ els. Rai and Jain (1982) empirically discovered a similar result in A. barbata populations. — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1822

Categorization

• XREF: connects to: Scale insects form separate genetic demes on each individual host tree — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1651; Migration maintains genetic variation only within an intermediate optimal range — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1820; Patch turnover rate governs mutant fate when extinction outpaces migration — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1823 (+3 more)

Broader Connections

• Migration maintains genetic variation only within an intermediate optimal range #qualifies (0.75) — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1820
• Mosses evolved two reproductive strategies trading dispersal distance against genetic novelty #expands (0.72) — Robin Wall Kimmerer, Gathering Moss, 323
• Stable habitats favor clonal asexual reproduction over sexual spore production #expands (0.72) — Robin Wall Kimmerer, Gathering Moss, 317
• Patch turnover rate governs mutant fate when extinction outpaces migration #expands (0.70) — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1823
• Fragmented-landscape populations rarely reach equilibrium, defeating deterministic management #complicates (0.70) — S. T. A. Pickett and P. S. White, eds., The Ecology of Natural Disturbance and…, 1233