Determinants of Genetic Structure in a Nonequilibrium Metapopulation of the Plant Silene latifolia

Fields, Peter D.; Taylor, Douglas R.

doi:10.1371/journal.pone.0104575

Cited by 12 publications

(12 citation statements)

References 66 publications

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“…After accounting for extrinsic factors and genetic drift, A. chrysogaster , G. nigra , A. natalis and M. dolomieu had substantial unexplained variation in pairwise F ST , suggesting network geometry plays a reduced role in shaping spatial genetic variation for these species. Nonequilibrium population processes such as extirpation and recolonization dynamics (Fields & Taylor ) or ecological disturbances (Banks et al . ) can influence patterns of genetic variation and might lead to genetic differentiation patterns unrelated to network architecture.…”

Section: Discussionmentioning

confidence: 99%

River network architecture, genetic effective size and distributional patterns predict differences in genetic structure across species in a dryland stream fish community

et al. 2017

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Dendritic ecological network (DEN) architecture can be a strong predictor of spatial genetic patterns in theoretical and simulation studies. Yet, interspecific differences in dispersal capabilities and distribution within the network may equally affect species' genetic structuring. We characterized patterns of genetic variation from up to ten microsatellite loci for nine numerically dominant members of the upper Gila River fish community, New Mexico, USA. Using comparative landscape genetics, we evaluated the role of network architecture for structuring populations within species (pairwise F ) while explicitly accounting for intraspecific demographic influences on effective population size (N ). Five species exhibited patterns of connectivity and/or genetic diversity gradients that were predicted by network structure. These species were generally considered to be small-bodied or habitat specialists. Spatial variation of N was a strong predictor of pairwise F for two species, suggesting patterns of connectivity may also be influenced by genetic drift independent of network properties. Finally, two study species exhibited genetic patterns that were unexplained by network properties and appeared to be related to nonequilibrium processes. Properties of DENs shape community-wide genetic structure but effects are modified by intrinsic traits and nonequilibrium processes. Further theoretical development of the DEN framework should account for such cases.

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Section: Discussionmentioning

confidence: 99%

River network architecture, genetic effective size and distributional patterns predict differences in genetic structure across species in a dryland stream fish community

et al. 2017

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“…Such increased gene flow is particularly important within a metapopulation context, because the negative demographic and genetic consequences of small population size and local extinction can be mitigated by connectivity with other populations in the region [15,23,24]. Under this model, gene flow shares diversity among populations so the metapopulation as a whole maintains higher N e and sustains the invasion even if individual invasive populations are small.…”

Section: (A) Genetic Variation and Response To Selectionmentioning

confidence: 99%

“…Population genetic models that assign source populations to colonists and test for genetic associations between source population characteristics (e.g. density, inbreeding rate and phenotypes) and colonization probability may be a particularly useful approach for investigating the effect of metapopulation context on population persistence [24,26].…”

Section: (A) Genetic Variation and Response To Selectionmentioning

confidence: 99%

Invasions and extinctions through the looking glass of evolutionary ecology

Colautti

Alexander

Dlugosch

et al. 2017

Phil. Trans. R. Soc. B

116

102

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One contribution of 18 to a theme issue 'Human influences on evolution, and the ecological and societal consequences'. Invasive and endangered species reflect opposite ends of a spectrum of ecological success, yet they experience many similar eco-evolutionary challenges including demographic bottlenecks, hybridization and novel environments. Despite these similarities, important differences exist. Demographic bottlenecks are more transient in invasive species, which (i) maintains ecologically relevant genetic variation, (ii) reduces mutation load, and (iii) increases the efficiency of natural selection relative to genetic drift. Endangered species are less likely to benefit from admixture, which offsets mutation load but also reduces fitness when populations are locally adapted. Invading species generally experience more benign environments with fewer natural enemies, which increases fitness directly and also indirectly by masking inbreeding depression. Adaptive phenotypic plasticity can maintain fitness in novel environments but is more likely to evolve in invasive species encountering variable habitats and to be compromised by demographic factors in endangered species. Placed in an eco-evolutionary context, these differences affect the breadth of the ecological niche, which arises as an emergent property of antagonistic selection and genetic constraints. Comparative studies of invasions and extinctions that apply an eco-evolutionary perspective could provide new insights into the environmental and genetic basis of ecological success in novel environments and improve efforts to preserve global biodiversity.This article is part of the themed issue 'Human influences on evolution, and the ecological and societal consequences'.

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“…As the founding population represents only a part of the source population, it most likely will be genetically differentiated from the source at emergence. For example, riparian populations of oregano ( Origanum vulgare ; Van Looy, Jacquemyn, Breyne, & Honnay, ) and roadside populations of white campion ( Silene latifolia ; Fields & Taylor, ) display strong genetic differentiation between populations due to founder effects. A small founding population also has a small effective population size, which combined with genetic drift can lead to further genetic differentiation between newly founded populations and their source population.…”

Section: Introductionmentioning

confidence: 99%

Using genomic information for management planning of an endangered perennial, Viola uliginosa

Lee

Ranta

Saarikivi

et al. 2020

Ecology and Evolution

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Species occupying habitats subjected to frequent natural and/or anthropogenic changes are a challenge for conservation management. We studied one such species, Viola uliginosa, an endangered perennial wetland species typically inhabiting sporadically flooded meadows alongside rivers/lakes. In order to estimate genomic diversity, population structure, and history, we sampled five sites in Finland, three in Estonia, and one each in Slovenia, Belarus, and Poland using genomic SNP data with double‐digest restriction site‐associated DNA sequencing (ddRAD‐seq). We found monophyletic populations, high levels of inbreeding (mean population FSNP = 0.407–0.945), low effective population sizes (Ne = 0.8–50.9), indications of past demographic expansion, and rare long‐distance dispersal. Our results are important in implementing conservation strategies for V. uliginosa, which should include founding of seed banks, ex situ cultivations, and reintroductions with individuals of proper origin, combined with continuous population monitoring and habitat management.

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Determinants of Genetic Structure in a Nonequilibrium Metapopulation of the Plant Silene latifolia

Cited by 12 publications

References 66 publications

River network architecture, genetic effective size and distributional patterns predict differences in genetic structure across species in a dryland stream fish community

River network architecture, genetic effective size and distributional patterns predict differences in genetic structure across species in a dryland stream fish community

Invasions and extinctions through the looking glass of evolutionary ecology

Using genomic information for management planning of an endangered perennial, Viola uliginosa

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