Population genomics of Monadenia (Gastropoda: Stylommatophora: Xanthonychidae) land snails reveals structuring but gene-flow across distinct species and morphotypes

Oswald, Jessica A.; Roth, Barry; Faske, Trevor M.; Allen, Julie M.; Mestre, Cathleen; Rivers-Pankratz, Darci; Norman, Kelli Van; Guralnick, Robert

doi:10.1007/s10592-021-01410-w

Cited by 2 publications

(4 citation statements)

References 46 publications

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“…4), with high levels of nucleotide diversity found in all populations. The nucleotide diversity reported here is relatively high compared to other species observed across phyla (Leffler et al, 2012), although lower than what has been observed in other gastropod species (Redak et al, 2021;Oswald et al, 2022). The slightly negative Tajima's D found in all populations indicates that there was an excess of rare alleles compared to the neutral model, which could reflect a recent population expansion or positive selection.…”

Section: Demographic and Genetic Effects Of The Invasioncontrasting

confidence: 74%

Limited migration from physiological refugia constrains the rescue of native gastropods facing an invasive predator

Salamon,

Astorg,

Paccard

et al. 2023

Preprint

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Biological invasions have caused the loss of freshwater biodiversity worldwide. The interplay between adaptive responses and demographic characteristics is expected to be important for the resilience of populations to biological invasions, but the interaction between these factors is poorly understood. The native freshwater gastropod Amnicola limosus is distributed along spatial variation in impact from an invasive molluscivorous fish (Neogobius melanostomus), as well as in calcium concentration, which limits the distribution of this invader and thus provides refuges for the gastropods. We investigated if refuge populations could provide migrants to declining invaded gastropod populations through gene flow (i.e., demographic rescue), which could also help maintain genetic diversity (i.e., genetic rescue). We also tested for genetic adaptation of A. limosus to the invasive predator and the low calcium habitats. We conducted pooled whole-genome sequencing of twelve gastropod populations from the Upper St. Lawrence River, complemented with a laboratory reciprocal transplant of wild F0 A. limosus to measure survival and fecundity in treatments of water calcium concentration (low/high) and round goby cue (present/absent). We found that gene flow is restricted from the low-calcium uninvaded refugia towards high-calcium invaded populations, implying that the potential for demographic and genetic rescue is limited. We also detected signatures of divergent selection between habitat types and evidence of low fitness of individuals from refugia populations in both habitat types, which could be either a cause or consequence of the population structure between habitat types and highlights the potential conflict between demographic/genetic rescue and adaptation.

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Section: Demographic and Genetic Effects Of The Invasioncontrasting

confidence: 74%

Limited migration from physiological refugia constrains the rescue of native gastropods facing an invasive predator

Salamon,

Astorg,

Paccard

et al. 2023

Preprint

View full text Add to dashboard Cite

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“…There are eight recognized subspecies of M. fidelis [28], though a recent population-genomic analysis of Monadenia spp. in the Pacific Northwest revealed extensive admixture and gene flow between species and subspecies [29]. Although M. fidelis is widespread throughout its natural range, one subspecies, Monadenia fidelis minor, was petitioned for federal listing under the Endangered Species Act [29].…”

Section: Plos Onementioning

confidence: 99%

“…fidelis [ 28 ], though a recent population-genomic analysis of Monadenia spp. in the Pacific Northwest revealed extensive admixture and gene flow between species and subspecies [ 29 ]. Although M .…”

Section: Introductionmentioning

confidence: 99%

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The biocontrol nematode Phasmarhabditis hermaphrodita infects and increases mortality of Monadenia fidelis, a non-target terrestrial gastropod species endemic to the Pacific Northwest of North America, in laboratory conditions

Denver,

Howe,

Colton

et al. 2024

PLoS ONE

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Inundative biological control (biocontrol) efforts in pest management lead to the mass distribution of commercialized biocontrol agents. Many ‘biocontrol gone awry’ incidents have resulted in disastrous biodiversity impacts, leading to increased scrutiny of biocontrol efforts. The nematode Phasmarhabditis hermaphrodita is sold as a biocontrol agent on three continents and targets pest gastropods such as Deroceras reticulatum, the Grey Field Slug; P. hermaphrodita is not presently approved for use in the United States. Investigations into the potential for P. hermaphrodita to infect non-target gastropod species of conservation relevance, however, are limited. We examined the effects of three strains of P. hermaphrodita on mortality in Monadenia fidelis, the Pacific Sideband, a snail species endemic to the Pacific Northwest of North America, in laboratory conditions. Across a 71-day laboratory infectivity assay, snails exposed to each of the three nematode strains, each analyzed at two doses, experienced a mean 50% mortality by days 20–42. All nematode-treated snails were dead by the end of the study. By contrast, 30/30 water-control snails experienced no mortality. Nematodes killed smaller, juvenile-stage snails significantly faster than those in larger and more developmentally advanced hosts. Our results provide direct evidence that the biocontrol nematode P. hermaphrodita infects and kills M. fidelis, a non-target gastropod species endemic to the Pacific Northwest, in laboratory conditions. This study suggests that introduction of P. hermaphrodita to new ecosystems might negatively impact endemic gastropod biodiversity and advocates for further investigation of non-target effects, including in conditions closer to the natural environments of non-target species.

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Population genomics of Monadenia (Gastropoda: Stylommatophora: Xanthonychidae) land snails reveals structuring but gene-flow across distinct species and morphotypes

Cited by 2 publications

References 46 publications

Limited migration from physiological refugia constrains the rescue of native gastropods facing an invasive predator

Limited migration from physiological refugia constrains the rescue of native gastropods facing an invasive predator

The biocontrol nematode Phasmarhabditis hermaphrodita infects and increases mortality of Monadenia fidelis, a non-target terrestrial gastropod species endemic to the Pacific Northwest of North America, in laboratory conditions

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