Range-wide phylogeographic analysis of the spotted frog complex (Rana luteiventris and Rana pretiosa) in northwestern North America

Funk, W. Chris; Pearl, Christopher A.; Draheim, Hope M.; Adams, Michael J.; Mullins, Thomas D.; Haig, Susan M.

doi:10.1016/j.ympev.2008.05.037

Cited by 39 publications

(50 citation statements)

References 63 publications

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“…Mitochondrial DNA analysis All R. pretiosa sequences were more closely related to each other than to the sequences from R. luteiventris ( Fig. 7; see also Funk et al 2008). We found 8 unique R. pretiosa haplotypes via SSCP.…”

Section: Comparison Of Gene Flow and Effective Sizes Between R Pretimentioning

confidence: 75%

“…These loci were developed for R. pretiosa (loci with ''RP'' prefix) or for R. luteiventris (loci with ''SFC'' prefix), which is the sister species of R. pretiosa (Green et al 1997;Hillis and Wilcox 2005;Funk et al 2008). PCR amplifications (25 ll) were carried out with the components and conditions as described in Monsen and Blouin (2004), but with locus-specific annealing temperatures and fluorescently-labeled forward primers (see Appendix A for primer sequences).…”

Section: Microsatellite Loci-amplification and Genotypingmentioning

confidence: 99%

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Population structure and conservation genetics of the Oregon spotted frog, Rana pretiosa

2010

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The Oregon spotted frog (Rana pretiosa) is one of the most threatened amphibians in the Pacific Northwest.Here we analyzed data from 13 microsatellite loci and 298 bp of mitochondrial DNA in frogs collected from 23 of the remaining R. pretiosa populations in order to (1) assess levels of genetic diversity within populations of R. pretiosa, (2) identify the major genetic groups in the species, (3) estimate levels of genetic differentiation and gene flow among populations within each major group, and (4) compare the pattern of differentiation among R. pretiosa populations with that among populations of R. cascadae, a non-endangered congener that also occurs in Oregon and Washington. There is a strong, hierarchical genetic structure in R. pretiosa. That structure includes six major genetic groups, one of which is represented by a single remaining population. R. pretiosa populations have low genetic diversity (average H e = 0.31) compared to R. cascadae (average H e = 0.54) and to other ranid frogs. Genetic subdivision among populations is much higher in R. pretiosa than in R. cascadae, particularly over the largest geographic distances (hundreds of kilometers). A joint analysis of migration rates among populations and of effective sizes within populations (using MIGRATE) suggests that both species have extremely low migration rates, and that R. pretiosa have slightly smaller effective sizes. However, the slight difference in effective sizes between species appears insufficient to explain the large difference in genetic diversity and in large-scale genetic structure. We therefore hypothesize that low connectivity among the more widely-spaced R. pretiosa populations (owing to their patchier habitat), is the main cause of their lower genetic diversity and higher among-population differentiation. Conservation recommendations for R. pretiosa include maintaining habitat connectivity to facilitate gene flow among populations that are still potentially connected, and either expanding habitat or founding additional 'backup' populations to maintain diversity in the isolated populations. We recommend that special consideration be given to conservation of the Camas Prairie population in Northern Oregon. It is the most geographically isolated population, has the lowest genetic diversity (H e = 0.14) and appears to be the only remaining representative of a major genetic group that is now almost extinct. Finally, because the six major groups within R. pretiosa are strongly differentiated, occupy different habitat types, and are geographically separate, they should be recognized as evolutionarily significant units for purposes of conservation planning.

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Section: Comparison Of Gene Flow and Effective Sizes Between R Pretimentioning

confidence: 75%

Section: Microsatellite Loci-amplification and Genotypingmentioning

confidence: 99%

Population structure and conservation genetics of the Oregon spotted frog, Rana pretiosa

2010

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“…This provides a unique perspective to the role of climate change in amphibian declines in temperate ecosystems. Previous shifts in climate have had dramatic effects on the distribution, genetics, and ecology of numerous temperate amphibian species (43)(44)(45). The impacts of ongoing climate change will vary across the globe, and this is likely to increase the viability of some species while being detrimental to others.…”

Section: Discussionmentioning

confidence: 99%

Decreased winter severity increases viability of a montane frog population

McCaffery

Maxell

2010

Proc. Natl. Acad. Sci. U.S.A.

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Many proximate causes of global amphibian declines have been well documented, but the role that climate change has played and will play in this crisis remains ambiguous for many species. Breeding phenology and disease outbreaks have been associated with warming temperatures, but, to date, few studies have evaluated effects of climate change on individual vital rates and subsequent population dynamics of amphibians. We evaluated relationships among local climate variables, annual survival and fecundity, and population growth rates from a 9-year demographic study of Columbia spotted frogs (Rana luteiventris) in the Bitterroot Mountains of Montana. We documented an increase in survival and breeding probability as severity of winter decreased. Therefore, a warming climate with less severe winters is likely to promote population viability in this montane frog population. More generally, amphibians and other ectotherms inhabiting alpine or boreal habitats at or near their thermal ecological limits may benefit from the milder winters provided by a warming climate as long as suitable habitats remain intact. A more thorough understanding of how climate change is expected to benefit or harm amphibian populations at different latitudes and elevations is essential for determining the best strategies to conserve viable populations and allow for gene flow and shifts in geographic range.amphibian | climate change | demography | Rana luteiventris | snowpack A mphibian populations are declining around the globe at an alarming rate (1-3), and climate change now figures prominently as a potential interactive driver of some of these declines (4-6). A shift to earlier breeding phenology has been documented in a number of species (7-11), but this shift is not universal across species and has not been tied to population-level consequences. Other work has associated climatic conditions with disease-related declines in the Neotropics (4, 5), yet no mechanisms have been definitively linked to these correlations (12, 13). Reading et al. (14) showed a decrease in adult female body condition and survival in a population of common toads (Bufo bufo) that corresponded with an increase in average annual temperatures. However, these demographic changes were not explicitly linked to changes in population size over time. Kiesecker et al. (15) showed that disease, UV-B, and climate change could interact to increase embryo mortality in western toad (Bufo boreas) populations, yet these populations have not declined. This increased premetamorphic mortality may not be sufficient to cause otherwise increasing populations to decline in the long term. Alternatively, it may be that conditions in short-term or laboratory-based studies are not always representative of long-term patterns in natural populations. To determine mechanisms of population change, we first need to know which vital rates are affected by changes in climate, and then how these changes affect population dynamics.The effects of climate change on growth and survival are particularly relev...

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“…Carstens et al 2005;Funk et al 2008), mountain systems(Knowles et al 2007;Shepard and Burbrink 2009;Galbreath et al 2010) and some covering a wider area (eg Avise 2000;Maroja et al 2007;Fontanella et al 2008;Zeisset and Beebee 2008)…”

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confidence: 99%

Quaternary phylogeography: the roots of hybrid zones

Hewitt¹

2011

Genetica

352

336

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The older history of hybrid zones is explored through consideration of recent advances in climatology, paleontology and phylogeography in the Late Cenozoic, particularly the Quaternary Period with its major climatic cycles. The fossil record shows that these ice ages and their nested millennial oscillations caused substantial changes in species distributions and with genetic evidence allows deduction of refugia and colonization routes in arctic, temperate, desert and tropical regions. The age of divergence between hybridizing lineages varies from the Late Pleistocene to the Late Miocene, implying much range change and varying selection on sister lineages. Hybridizing lineages in the Tropical and Temperate regions range in age from young to old, but those studied in the Arctic are no more than a few ice ages old and their refugial roots are not clear. Mid to low latitude regions often show parapatric patchworks of lineages and multiple refugia stable through many climatic oscillations. Particular hybrid zones may have formed more than once; while some expansions were not the same, producing reticulation and introgression in previous glacial cycles. Hybrid-zone roots are complex and deep, and considerations of their complexity can reveal evolutionary pathways of species. They are indeed windows on evolution.

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Range-wide phylogeographic analysis of the spotted frog complex (Rana luteiventris and Rana pretiosa) in northwestern North America

Cited by 39 publications

References 63 publications

Population structure and conservation genetics of the Oregon spotted frog, Rana pretiosa

Population structure and conservation genetics of the Oregon spotted frog, Rana pretiosa

Decreased winter severity increases viability of a montane frog population

Quaternary phylogeography: the roots of hybrid zones

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