Spatial capture–recapture reveals age- and sex-specific survival and movement in stream amphibians

Honeycutt, R. Ken; Garwood, Justin M.; Lowe, Winsor H.; Hossack, Blake R.

doi:10.1007/s00442-019-04464-3

Cited by 10 publications

(6 citation statements)

References 70 publications

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“…The general structure of these populations is quite similar within the CEZ between mitochondrial and nuclear markers (Figure 4a , b), and for the two types of markers, isolation by distance is not rejected. In amphibians, dispersion is usually male‐biased (reviewed by Helfer et al ( 2012 ), but see Honeycutt et al ( 2019 )). Since mtDNA is transmitted by females, in case of a strong migration process, there would have been a discrepancy between the relative nuclear and mitochondrial population genetic structure.…”

Section: Discussionmentioning

confidence: 99%

Unusual evolution of tree frog populations in the Chernobyl exclusion zone

Car

Gilles

Armant

et al. 2022

Evolutionary Applications

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Despite the ubiquity of pollutants in the environment, their long‐term ecological consequences are not always clear and still poorly studied. This is the case concerning the radioactive contamination of the environment following the major nuclear accident at the Chernobyl nuclear power plant. Notwithstanding the implications of evolutionary processes on the population status, few studies concern the evolution of organisms chronically exposed to ionizing radiation in the Chernobyl exclusion zone. Here, we examined genetic markers for 19 populations of Eastern tree frog (Hyla orientalis) sampled in the Chernobyl region about thirty years after the nuclear power plant accident to investigate microevolutionary processes ongoing in local populations. Genetic diversity estimated from nuclear and mitochondrial markers showed an absence of genetic erosion and higher mitochondrial diversity in tree frogs from the Chernobyl exclusion zone compared to other European populations. Moreover, the study of haplotype network permitted us to decipher the presence of an independent recent evolutionary history of Chernobyl exclusion zone's Eastern tree frogs caused by an elevated mutation rate compared to other European populations. By fitting to our data a model of haplotype network evolution, we suspected that Eastern tree frog populations in the Chernobyl exclusion zone have a high mitochondrial mutation rate and small effective population sizes. These data suggest that Eastern tree frog populations might offset the impact of deleterious mutations because of their large clutch size, but also question the long‐term impact of ionizing radiation on the status of other species living in the Chernobyl exclusion zone.

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Section: Discussionmentioning

confidence: 99%

Unusual evolution of tree frog populations in the Chernobyl exclusion zone

Car

Gilles

Armant

et al. 2022

Evolutionary Applications

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“…However, like recent spatial‐capture–recapture models (e.g. Ergon & Gardner, 2014; Honeycutt et al., 2019), our statistical approach incorporated survival and imperfect observation processes into the model (including limited spatial coverage of observations), thereby accounting for permanent emigration of individuals (Terui et al., 2017). As a result, this approach—a variant of spatial Cormack–Jolly–Seber models (Schaub & Royle, 2014)—has been shown to provide substantially improved estimates of dispersal parameters (Terui, 2020).…”

Section: Discussionmentioning

confidence: 99%

Non‐random dispersal in sympatric stream fishes: Influences of natural disturbance and body size

2021

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1. Although the prevailing paradigms in spatial ecology have treated dispersal as a stochastic process, there is an increasing awareness that spatial processes are non-random such that individual characteristics and ecological contexts influence dispersal. Natural disturbance, such as river flooding, is known to stimulate dispersal behaviour, but its interactive effects with individual-level characteristics (e.g. body size) of potential dispersers remain elusive. It is critical to fill this knowledge gap because anthropogenic impacts (including climate change) alter both disturbance regimes and population structures. 2. Here, we examined how extreme high flows and individual body size combined to influence dispersal of three fishes (creek chub Semotilus atromaculatus, bluehead chub Nocomis leptocephalus, and striped jumprock Moxostoma rupicartes) in two streams (740 and 520 m long) in South Carolina, U.S.A. We focused on extreme high flows as a natural disturbance, whereas body size was used as an individuallevel characteristic of dispersers. A total of 5,604 individuals were uniquely marked in the two streams over a >2-year study period, during which sampling occurred every 2 months.3. The intensive capture-recapture study revealed differential effects of disturbance and body size among sympatric stream fishes. Extreme high flows increased dispersal of striped jumprock and creek chub, whereas body size influenced dispersal of striped jumprock with larger individuals traveling longer distances. Bluehead chub showed a complex dispersal response. That is, size-dependence in dispersal emerged only during high-flow periods.4. The results of this study build upon previous efforts by providing field-based evidence of how disturbance and individual characteristics (body size) combine to drive non-random dispersal and how it varies among sympatric species. This finding is important because metapopulations that are maintained by different nonrandom dispersal (i.e. externally or internally driven) may show varied sensitivities to human-induced environmental changes.

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“…4a.b), and for the two type of markers, isolation by distance is not rejected. In amphibians, dispersion is usually male-biased (reviewed by 79 , but see 80 ). Since mtDNA is transmitted by females, in case of a strong migration process, there would have been a discrepancy between the relative nuclear and mitochondrial population genetic structure.…”

Section: Discussionmentioning

confidence: 99%

Unusual evolution of tree frog populations in the Chernobyl exclusion zone

Car

Gilles

Armant

et al. 2020

Preprint

View full text Add to dashboard Cite

Despite the ubiquity of pollutants in the environment, their long-term ecological consequences are not always clear and still poorly studied. This is the case concerning the radioactive contamination of the environment following the major nuclear accident at the Chernobyl nuclear power plant. Notwithstanding the implications of evolutionary processes on the population status, few studies concern the evolution of organisms chronically exposed to ionizing radiation in the Chernobyl exclusion zone. Here, we examined genetic markers for 19 populations of Eastern tree frog (Hyla orientalis) sampled in the Chernobyl region about thirty years after the nuclear power plant accident to investigate microevolutionary processes ongoing in local populations. Genetic diversity estimated from nuclear and mitochondrial markers showed an absence of genetic erosion and higher mitochondrial diversity in tree frogs from the Chernobyl exclusion zone compared to other European populations. Moreover, the study of haplotype network permitted us to decipher the presence of an independent recent evolutionary history of Chernobyl exclusion zone’s Eastern tree frogs caused by an elevated mutation rate compared to other European populations. By fitting to our data a model of haplotype network evolution, we suspected that Eastern tree frog populations in the Chernobyl exclusion zone have a high mitochondrial mutation rate and small effective population sizes. These data suggest that Eastern tree frogs populations might offset the impact of deleterious mutations because of their large clutch size, but also question the long term impact of ionizing radiation on the status of other species living in the Chernobyl exclusion zone.

show abstract

Spatial capture–recapture reveals age- and sex-specific survival and movement in stream amphibians

Cited by 10 publications

References 70 publications

Unusual evolution of tree frog populations in the Chernobyl exclusion zone

Unusual evolution of tree frog populations in the Chernobyl exclusion zone

Non‐random dispersal in sympatric stream fishes: Influences of natural disturbance and body size

Unusual evolution of tree frog populations in the Chernobyl exclusion zone

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