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- Title
Environment-dependent variation in selection on life history across small spatial scales.
- Authors
Lange, Rolanda; Monro, Keyne; J. Marshall, Dustin
- Abstract
Variation in life-history traits is ubiquitous, even though genetic variation is thought to be depleted by selection. One potential mechanism for the maintenance of trait variation is spatially variable selection. We explored spatial variation in selection in the field for a colonial marine invertebrate that shows phenotypic differences across a depth gradient of only 3 m. Our analysis included life-history traits relating to module size, colony growth, and phenology. Directional selection on colony growth varied in strength across depths, while module size was under directional selection at one depth but not the other. Differences in selection may explain some of the observed phenotypic differentiation among depths for one trait but not another: instead, selection should actually erode the differences observed for this trait. Our results suggest selection is not acting alone to maintain trait variation within and across environments in this system.
- Subjects
SPATIAL variation; BIOLOGICAL models; BIOLOGICAL variation; LIFE history theory; HUMAN genetic variation; BRYOZOA
- Publication
Evolution, 2016, Vol 70, Issue 10, p2404
- ISSN
0014-3820
- Publication type
Article
- DOI
10.1111/evo.13033