The effects of conspecifics on burrow selection in juvenile spotted salamanders (Ambystoma maculatum)

Greene, Kathryn; Pittman, Shannon E.; Dorcas, Michael E.

doi:10.1007/s10164-016-0476-6

Cited by 6 publications

(4 citation statements)

References 22 publications

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“…For prey species, highly populated locations can be an indication for a safe shelter or of a place with numerous mating opportunities. This type of positive density-dependent immigration (also called conspecific attraction) is, for example, found in several amphibians, such as the salamander species Mertensiella luschani (Gautier et al 2006) and Ambystoma maculatum (Greene et al 2016) as well as the frogs Oophaga pumilio (Folt et al 2018).…”

Section: Dispersal Mechanismsmentioning

confidence: 92%

The Effect of Habitat Choice on Evolutionary Rescue in Subdivided Populations

Czuppon

Blanquart

Uecker

et al. 2021

The American Naturalist

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Evolutionary rescue is the process by which a population, in response to an environmental change, successfully avoids extinction through adaptation. In spatially structured environments, dispersal can affect the probability of rescue. Here, we model an environment consisting of patches that degrade one after another, and we investigate the probability of rescue by a mutant adapted to the degraded habitat. We focus on the effects of dispersal and of immigration biases. We identify up to three regions delimiting the effect of dispersal on the probability of evolutionary rescue: (i) starting from low dispersal rates, the probability of rescue increases with dispersal;(ii) at intermediate dispersal rates, it decreases; and (iii) at large dispersal rates, it increases again with dispersal, except if mutants are too counterselected in not-yet-degraded patches. The probability of rescue is generally highest when mutant and wild-type individuals preferentially immigrate into patches that have already undergone environmental change. Additionally, we find that mutants that will eventually rescue the population most likely first appear in nondegraded patches. Overall, our results show that habitat choice, compared with the often-studied unbiased immigration scheme, can substantially alter the dynamics of population survival and adaptation to new environments.

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Section: Dispersal Mechanismsmentioning

confidence: 92%

The Effect of Habitat Choice on Evolutionary Rescue in Subdivided Populations

Czuppon

Blanquart

Uecker

et al. 2021

The American Naturalist

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“…Some salamander juveniles may have clumped distributions, as they are attracted to burrows occupied by conspecifics (Greene et al. ).…”

Section: Connectivity Across Spatial and Temporal Scalesmentioning

confidence: 99%

Biological Connectivity of Seasonally Ponded Wetlands across Spatial and Temporal Scales

Smith

Subalusky

Atkinson

et al. 2018

J American Water Resour Assoc

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Research Impact Statement: Seasonal wetlands are connected biologically to surrounding ecosystems through the movements of animals. This connectivity is critical to species conservation and ecosystem functioning.ABSTRACT: Many species that inhabit seasonally ponded wetlands also rely on surrounding upland habitats and nearby aquatic ecosystems for resources to support life stages and to maintain viable populations. Understanding biological connectivity among these habitats is critical to ensure that landscapes are protected at appropriate scales to conserve species and ecosystem function. Biological connectivity occurs across a range of spatial and temporal scales. For example, at annual time scales many organisms move between seasonal wetlands and adjacent terrestrial habitats as they undergo life-stage transitions; at generational time scales, individuals may disperse among nearby wetlands; and at multigenerational scales, there can be gene flow across large portions of a species' range. The scale of biological connectivity may also vary among species. Larger bodied or more vagile species can connect a matrix of seasonally ponded wetlands, streams, lakes, and surrounding terrestrial habitats on a seasonal or annual basis. Measuring biological connectivity at different spatial and temporal scales remains a challenge. Here we review environmental and biological factors that drive biological connectivity, discuss implications of biological connectivity for animal populations and ecosystem processes, and provide examples illustrating the range of spatial and temporal scales across which biological connectivity occurs in seasonal wetlands.(

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“…This type of positive density-dependent immigration (also called conspecific attraction) is for example found in several amphibians, e.g. the salamander species Mertensiella luschani (Gautier et al, 2006) and Ambystoma maculatum (Greene et al, 2016) or the frogs Oophaga pumilio (Folt et al, 2018). Old-New ( π w > 0, π m < 0) Wild-type individuals preferentially immigrate into old-habitat patches, while mutants prefer new-habitat patches.…”

Section: Model and Methodsmentioning

confidence: 95%

The effect of habitat choice on evolutionary rescue in subdivided populations

Czuppon

Blanquart

Uecker

et al. 2019

Preprint

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Evolutionary rescue is the process by which a declining population successfully adapts genetically to avoid extinction. In a structured environment that deteriorates patch by patch, dispersal can substantially alter the chances of evolutionary rescue of a wild-type population not viable in deteriorated patches. Here, we investigate the effect of different dispersal schemes and intensities on the probability of successful establishment of a mutant population adapted to the deteriorated environment. We find that the probability of evolutionary rescue can undergo up to three phases when increasing the rate of dispersal: (i) at low dispersal rates, the probability of establishment of a mutant population increases; (ii) then at intermediate dispersal rates the establishment probability decreases; and (iii) at large dispersal rates, the population homogenizes, either promoting or suppressing the process of evolutionary rescue, depending on the fitness difference between the mutant and the wild type. Our results show that habitat choice, when compared to uniform dispersal, impedes successful adaptation when the mutant has the same habitat preference as the wild type, but promotes adaptation when the mutant mainly immigrates into patches where it has a growth advantage over the wild type.

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The effects of conspecifics on burrow selection in juvenile spotted salamanders (Ambystoma maculatum)

Cited by 6 publications

References 22 publications

The Effect of Habitat Choice on Evolutionary Rescue in Subdivided Populations

The Effect of Habitat Choice on Evolutionary Rescue in Subdivided Populations

Biological Connectivity of Seasonally Ponded Wetlands across Spatial and Temporal Scales

The effect of habitat choice on evolutionary rescue in subdivided populations

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