Late Quaternary herpetofauna of the Central Great Lakes region, U.S.A.: Zoogeographical and paleoecological implications

Holman, J. Alan

doi:10.1016/0277-3791(92)90005-s

Cited by 18 publications

(9 citation statements)

References 11 publications

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“…A second potential refugium may have existed near present-day southern Indiana, south of the last glacial maximum. To the southwest of our study area, a rich mid-Holocene fossil record from Indiana, Ohio, and Michigan includes C. guttata and several other species, and suggests rapid postglacial colonization of the Great Lakes region from nearby refugia (Holman 1992). A similar pattern of simultaneous postglacial colonization from the east and west is also proposed for E. blandingii .…”

Section: Biogeographic Implicationsmentioning

confidence: 77%

Conservation genetics of the endangered Spotted Turtle (Clemmys guttata) illustrate the risks of “bottleneck tests”

DavyChristina

MurphyRobert

2014

Can. J. Zool.

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Studies of population genetics in turtles have suggested that turtles do not experience genetic impacts of bottlenecks as strongly as expected. However, recent studies cast doubt on two commonly used tests implemented in the program BOTTLENECK, suggesting that these findings should be re-evaluated. The Spotted Turtle (Clemmys guttata (Schneider, 1792)) is endangered both globally and within Canada, but genetic data required to develop effective recovery strategies are unavailable. Here, we conducted the first study of population genetic structure in C. guttata. We then used multiple small populations of C. guttata as replicates to test whether the commonly used program BOTTLENECK could detect the genetic signature of bottlenecks in our study populations, which are all thought to have experienced significant declines in the past 2-3 generations (75 years). Turtles (n = 256) were genotyped at 11 microsatellite loci. A suite of Bayesian population genetics analyses and a principal coordinates analysis identified a minimum of 6 distinct genetic populations and a maximum of 10 differentiated subpopulations across the sampled Canadian range of C. guttata, which corresponded to demographically independent units. BOTTLENECK failed to detect population declines. A literature review found that bottleneck tests in 17 of 18 previous genetic studies of tortoises and freshwater turtles were based on suboptimal sampling, potentially confounding their results. High retention of genetic diversity (allelic richness and heterozygosity) in isolated populations of C. guttata and other turtle species is encouraging for species recovery, but conclusions about the prevalence of genetic bottlenecks in such populations should be re-examined.Résumé : Des études de la génétique des populations chez les tortues semblent indiquer que les impacts génétiques des goulots d'étranglement sur ces dernières ne sont pas aussi forts que prévu. Des études récentes jettent toutefois un doute sur deux tests répandus utilisés dans le programme BOTTLENECK, ce qui suggère que ces résultats devraient être réévalués. La tortue ponctuée (Clemmys guttata (Schneider, 1792)) est en voie de disparation à l'échelle tant planétaire que canadienne, mais les données génétiques nécessaires à l'élaboration de stratégies de rétablissement efficaces ne sont pas disponibles. Nous avons réalisé la première étude de la structure de la génétique des populations chez C. guttata. Nous avons ensuite utilisé de multiples petites populations de C. guttata comme réplicats pour vérifier si le programme d'usage courant BOTTLENECK peut déceler la signature génétique de goulots d'étranglement dans les populations à l'étude, qui auraient toutes connu des diminutions significatives au cours des deux ou trois dernières générations (75 ans). Des tortues (n = 256) ont fait l'objet d'un génotypage sur 11 microsatellites. Un ensemble d'analyses bayésiennes de la génétique des populations et une analyse en coordonnées principales a permis de cerner au moins 6 populations génétiques distinctes ...

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Section: Biogeographic Implicationsmentioning

confidence: 77%

Conservation genetics of the endangered Spotted Turtle (Clemmys guttata) illustrate the risks of “bottleneck tests”

DavyChristina

MurphyRobert

2014

Can. J. Zool.

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“…For example, our study suggested remnant E. blandingii from bordering counties (Will 1, Dupage and Grundy) formed a single genetic cluster and potentially could be integrated without genetic risk; however, fine‐scale genetic structure was apparent between this cluster and the Will 2 site. The drivers of this pattern are unclear; Will 1 and 2 are only separated by ~9 km with no intervening natural landscape barriers to prevent historical dispersal, other than the potential for glaciated ice fronts (Holman, ). The observed genetic disparity may be a result of differential anthropogenic mortality pressures as Will 2 has greater road and railway densities, compared to the Will 1 site.…”

Section: Discussionmentioning

confidence: 99%

Population genetic evaluations within a co‐distributed taxonomic group: a multi‐species approach to conservation planning

Anthonysamy

Dreslik

Thompson

et al. 2017

Animal Conservation

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Multi-species approaches provide valuable insight for conservation planning, yet most studies focus on only one species while generalizing across taxa. Here, we employed 5-14 microsatellite DNA loci to evaluate population genetic patterns and future vulnerability for a freshwater turtle assemblage distributed across north-eastern Illinois. Focal species (Emydoidea blandingii, Clemmys guttata, Chrysemys picta and Chelydra serpentina) differ in conservation status as well as in ecological and life-history traits, which modulate gene flow across heterogeneous landscapes. We hypothesized (1) common and more ubiquitous species (C. picta and C. serpentina) would exhibit higher levels of genetic connectivity compared to species more restricted in distributions and with an elevated conservation status (E. blandingii and C. guttata) and (2) endangered species exhibit a greater loss of future genetic diversity. We found that genetic patterns varied considerably among co-distributed species. Endangered species had lower levels of genetic diversity and gene flow, more pronounced genetic structure and a higher risk of genetic drift compared to common species, thus supporting our hypotheses. The observed patterns are potentially attributable to life-history and ecological traits and will affect the long-term viability of the four species within a modified north-eastern Illinois landscape. Our study is an important first step for understanding how landscape features and species-specific traits interact to affect gene flow and population genetic structure within altered landscapes. It also underscores how multi-species approaches can be informative for conservation actions.Genetic patterns in a fragmented turtle community W. J. B. Anthonysamy et al.

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“…First, the two populations are separated from one another by roughly 560 km. Given the major range shifts stemming from Pleistocene glacial cycles that have been noted in other temperate species (e.g., Holman 1992; Placyk et al. 2007; Spellman et al.…”

Section: Discussionmentioning

confidence: 99%

Geographic Variation in Note Composition and Use ofchick‐a‐deeCalls of Carolina Chickadees (Poecile carolinensis)

Freeberg

2012

Ethology

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The aim of this study was to determine whether geographic variation exists in the composition of note types in the chick‐a‐dee call of Carolina chickadees. This determination is of interest for two reasons: earlier studies with a related species suggested minimal geographic variation in note composition, and geographic variation in social signals may represent important developmental or selection processes shaping signal use. Carolina chickadees were recorded in a naturalistic observation study in west‐central Indiana. Chick‐a‐dee calls were analyzed and compared to calls from an eastern Tennessee population that had been described in a previously published study (Auk, 125, 2008, 896). Despite much similarity in the basic rules by which notes are organized to compose calls, there were several significant differences in how calls of the two populations were structured. Furthermore, birds from Indiana used their chick‐a‐dee calls in certain contexts in different ways compared to birds from Tennessee. These findings suggest interesting population‐level variation in this call system, and future research should be able to determine whether these differences are driven by evolutionary, ecological, or developmental factors, or some combination of these factors.

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Late Quaternary herpetofauna of the Central Great Lakes region, U.S.A.: Zoogeographical and paleoecological implications

Cited by 18 publications

References 11 publications

Conservation genetics of the endangered Spotted Turtle (Clemmys guttata) illustrate the risks of “bottleneck tests”

Conservation genetics of the endangered Spotted Turtle (Clemmys guttata) illustrate the risks of “bottleneck tests”

Population genetic evaluations within a co‐distributed taxonomic group: a multi‐species approach to conservation planning

Geographic Variation in Note Composition and Use ofchick‐a‐deeCalls of Carolina Chickadees (Poecile carolinensis)

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