Timing Matters: Allochronic Contributions to Population Divergence

Helm, Barbara; Womack, Robyn

doi:10.1007/978-3-319-91689-7_6

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…Connections between timing mechanisms and population divergence are receiving increased emphasis (Rolshausen et al 2009;Helm et al 2013;Helm and Womack 2018), although references to Winker's important ideas remain few. A difference to note between Winker's heteropatry and the literature on migratory divides (Turbek et al 2018) is that Winker focused on populations whose wintering ranges overlap.…”

Section: Hormones Migration and Population Divergencementioning

confidence: 99%

What Do Ecology, Evolution, and Behavior Have in Common? The Organism in the Middle

Ketterson

2020

The American Naturalist

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Biologists who publish in The American Naturalist are drawn to its unifying mission of covering research in the fields of ecology, evolution, behavior, and integrative biology. Presented here is one scientist's attempt to straddle these fields by focusing on a single organism. It is also an account of how time spent in the field stimulates a naturalist to wonder "why did that animal just do that?" and how research is guided by chance and intention interacting with the scientific literature and the people one meets along the way. With respect to the science, the examples come from bird migration, hormones and their connection to phenotypic integration, sexual and natural selection, and urban ecology. They also come from research on the impact of environmental change on the timing of reproduction and the potential for allochrony in migratory species to influence population divergence.

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Section: Hormones Migration and Population Divergencementioning

confidence: 99%

What Do Ecology, Evolution, and Behavior Have in Common? The Organism in the Middle

Ketterson

2020

The American Naturalist

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“…Reproductive timing can thus be a magic trait, i.e., a trait for which ecological divergence and reproductive isolation are directly linked (Gavrilets, 2004). In the context of ecological divergence of populations with gene flow, most studies consider allochrony due to seasonal timing (Helm & Womack, 2018; Ragland et al, 2017; Tauber & Tauber, 1977; Taylor & Friesen, 2017) or daily timing (Devries et al, 2008; Fukami et al, 2003; Hänniger et al, 2017). Here, we demonstrate ecological divergence with gene flow based on daily and lunar‐phase timing in the marine midge Clunio marinus .…”

Section: Introductionmentioning

confidence: 99%

Timing strains of the marine insect Clunio marinus diverged and persist with gene flow

et al. 2021

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Genetic divergence of populations in the presence of gene flow is a central theme in speciation research. Theory predicts that divergence can happen with full range overlap – in sympatry – driven by ecological factors, but there are few empirical examples of how ecologically divergent selection can overcome gene flow and lead to reproductive isolation. In the marine midge Clunio marinus (Diptera: Chironomidae) reproduction is ecologically restricted to the time of the lowest tides, which is ensured through accurate control of development and adult emergence by circalunar and circadian clocks. As tidal regimes differ along the coastline, locally adapted timing strains of C. marinus are found in different sites across Europe. At the same time, ecologically suitable low tides occur at both full and new moon and twice a day, providing C. marinus with four nonoverlapping temporal niches at every geographic location. Along the coast of Brittany, which is characterized by a steep gradient in timing of the tides, we found an unusually large number of differentially adapted timing strains, and the first known instances of sympatric C. marinus strains occupying divergent temporal niches. Analysis of mitochondrial genotypes suggests that these timing strains originated from a single recent colonization event. Nuclear genotypes show strong gene flow, sympatric timing strains being the least differentiated. Even when sympatric strains exist in nonoverlapping temporal niches, timing adaptations do not result in genome‐wide genetic divergence, suggesting timing adaptations are maintained by permanent ecological selection. This constitutes a model case for incipient ecological divergence with gene flow.

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Timing Matters: Allochronic Contributions to Population Divergence

Cited by 2 publications

References 4 publications

What Do Ecology, Evolution, and Behavior Have in Common? The Organism in the Middle

What Do Ecology, Evolution, and Behavior Have in Common? The Organism in the Middle

Timing strains of the marine insect Clunio marinus diverged and persist with gene flow

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