Temporal and spatial dynamics of competitive parapatry in chewing lice

Hafner, David J.; Hafner, Mark S.; Spradling, Theresa A.; Light, Jessica E.; Demastes, James W.

doi:10.1002/ece3.5183

Cited by 10 publications

(20 citation statements)

References 60 publications

(120 reference statements)

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“…Geomydoecus aurei population expansion has progressed at a pace of approximately 150 m/year over the last 25 years (Hafner et al, ). Population expansion, however, did not occur at even rates along all sectors of the Rio Grande Valley, as G. aurei were present in small numbers or absent in some parts of our sampling grid (Figure c).…”

Section: Resultsmentioning

confidence: 99%

“…For linear spatial analysis within the zone of population expansion, infrapopulations collected south of the San Acacia constriction were assigned a “meters along transect” value (Table ) using methods and values calculated by Hafner et al (). In short, this value indicates the position of an infrapopulation on our north–south sampling transect with the location of initial colonization by G. aurei south of the San Acacia constriction designated as the zero point, or start, for transect measurements (Figure c).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Over the course of 25 years (1990–2016), we have periodically monitored the ongoing geographic range expansion of a species of ectoparasitic chewing louse ( Geomydoecus aurei ; Insecta: Phthiraptera ) as it colonizes a novel pocket gopher host (Demastes, ; Demastes, Hafner, Hafner, & Spradling, ; Hafner, Hafner, Spradling, Light, & Demastes, ; Hafner et al, ). This louse species normally is found on the pocket gopher, Thomomys bottae connectens , a subspecies that meets and hybridizes to a limited extent with another pocket gopher subspecies, T. bottae opulentus , at a physiographic constriction in the Rio Grande Valley in central New Mexico, USA (Hafner et al, ; Smith, Patton, Hafner, & Hafner, ). This habitat constriction, which we refer to as the San Acacia constriction, appears to have held the pocket gopher hybrid zone in place over a period of decades while the chewing louse, G. aurei , has advanced southward, colonizing the southern subspecies of pocket gopher ( T. b. opulentus ) south of the San Acacia constriction (Figure a,b; Hafner et al, ; Hafner et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…using methods and values calculated byHafner et al (2018). In short, this value indicates the position of an infrapopulation on our north-south sampling transect with the location of initial colonization by G. aurei south of the San Acacia constriction designated as the zero point, or start, for transect measurements(Figure 1c).…”

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confidence: 99%

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Loss of genetic diversity, recovery and allele surfing in a colonizing parasite, Geomydoecus aurei

Demastes

Hafner

et al. 2019

Molecular Ecology

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Understanding the genetic consequences of changes in species distributions has wide‐ranging implications for predicting future outcomes of climate change, for protecting threatened or endangered populations and for understanding the history that has led to current genetic patterns within species. Herein, we examine the genetic consequences of range expansion over a 25‐year period in a parasite (Geomydoecus aurei) that is in the process of expanding its geographic range via invasion of a novel host. By sampling the genetics of 1,935 G. aurei lice taken from 64 host individuals collected over this time period using 12 microsatellite markers, we test hypotheses concerning linear spatial expansion, genetic recovery time and allele surfing. We find evidence of decreasing allelic richness (AR) with increasing distance from the source population, supporting a linear, stepping stone model of spatial expansion that emphasizes the effects of repeated bottleneck events during colonization. We provide evidence of post‐bottleneck genetic recovery, with average AR of infrapopulations increasing about 30% over the 225‐generation span of time observed directly in this study. Our estimates of recovery rate suggest, however, that recovery has plateaued and that this population may not reach genetic diversity levels of the source population without further immigration from the source population. Finally, we employ a grid‐based sampling scheme in the region of ongoing population expansion and provide empirical evidence for the power of allele surfing to impart genetic structure on a population, even under conditions of selective neutrality and in a place that lacks strong barriers to gene flow.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Loss of genetic diversity, recovery and allele surfing in a colonizing parasite, Geomydoecus aurei

Demastes

Hafner

et al. 2019

Molecular Ecology

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The interplay between host biogeography and phylogeny in structuring diversification of the feather louse genus Penenirmus

Johnson

Weckstein

Herrera

et al. 2021

Molecular Phylogenetics and Evolution

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Evolutionary repeatability of emergent properties of ecological communities

Venkataram

Kryazhimskiy

2023

Phil. Trans. R. Soc. B

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Most species belong to ecological communities where their interactions give rise to emergent community-level properties, such as diversity and productivity. Understanding and predicting how these properties change over time has been a major goal in ecology, with important practical implications for sustainability and human health. Less attention has been paid to the fact that community-level properties can also change because member species evolve. Yet, our ability to predict long-term eco-evolutionary dynamics hinges on how repeatably community-level properties change as a result of species evolution. Here, we review studies of evolution of both natural and experimental communities and make the case that community-level properties at least sometimes evolve repeatably. We discuss challenges faced in investigations of evolutionary repeatability. In particular, only a handful of studies enable us to quantify repeatability. We argue that quantifying repeatability at the community level is critical for approaching what we see as three major open questions in the field: (i) Is the observed degree of repeatability surprising? (ii) How is evolutionary repeatability at the community level related to repeatability at the level of traits of member species? (iii) What factors affect repeatability? We outline some theoretical and empirical approaches to addressing these questions. Advances in these directions will not only enrich our basic understanding of evolution and ecology but will also help us predict eco-evolutionary dynamics. This article is part of the theme issue ‘Interdisciplinary approaches to predicting evolutionary biology’.

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Temporal and spatial dynamics of competitive parapatry in chewing lice

Cited by 10 publications

References 60 publications

Loss of genetic diversity, recovery and allele surfing in a colonizing parasite, Geomydoecus aurei

Loss of genetic diversity, recovery and allele surfing in a colonizing parasite, Geomydoecus aurei

The interplay between host biogeography and phylogeny in structuring diversification of the feather louse genus Penenirmus

Evolutionary repeatability of emergent properties of ecological communities

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