The Mitochondrial Genetic Diversity of the Olive Field Mouse Abrothrix olivacea (Cricetidae; Abrotrichini) is Latitudinally Structured Across Its Geographic Distribution

Quiroga-Carmona, Marcial; Abud, Carolina; Lessa, Enrique P.; D’Elı́a, Guillermo

doi:10.1007/s10914-021-09582-5

Cited by 3 publications

(20 citation statements)

References 76 publications

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“…The olive field mouse, Abrothrix olivacea (Family Cricetidae, Tribe Abrotrichini), matches with the second scheme described by Pardiñas et al 31 ; its mitochondrial diversity is structured in four main and mostly allopatric phylogroups originated during the last million years, which experienced independent demographic dynamics 37 ; see also 33,[40][41][42] . However, no study has explicitly evaluated whether the identified patterns of genetic structure correlate with landscape features and their temporal dynamism.…”

supporting

confidence: 75%

“…Mitochondrial data and intraspecific grouping. The analyzed mitochondrial dataset corresponds to the one assembled by Quiroga-Carmona et al 37 to assess the phylogeographic structure and historical demography of Abrothrix olivacea. The dataset consists of 801 bp of the cytochrome-b gene (Cytb) from a total of 416 specimens collected from 103 localities (46 from Argentina and 57 from Chile; see Supplementary materials [SM], Appendix 1).…”

Section: Methodsmentioning

confidence: 99%

“…The dataset consists of 801 bp of the cytochrome-b gene (Cytb) from a total of 416 specimens collected from 103 localities (46 from Argentina and 57 from Chile; see Supplementary materials [SM], Appendix 1). This was employed to extract a dataset of mitochondrial binary single-nucleotide polymorphisms (mt-SNP) following the workflow outlined by Jombart et al 45 and employed in Quiroga-Carmona et al 37 . The mt-SNP dataset was employed to perform a genetic-based Principal Components Analysis (gPCA) to summarize the dimensionality of the mitochondrial genetic data into a reduced set of principal components axes (PCs).…”

Section: Methodsmentioning

confidence: 99%

“…These events were also relevant for the evolution of small mammal species because its impact on demographic processes, patterns of gene flow, and changes in their geographic ranges; see 30 for an early review. According to Pardiñas et al 31 , the effects of these events over the structure of the mitochondrial genetic diversity of the sigmodontine rodents can be summarized in two general schemes, corresponding to a set of species that exhibit low genetic diversity and apparent absence of phylogeographic structure (e.g., Paynomys macronyx 32 ; Reithrodon auritus, Phyllotis xanthopygus 33 , and a second set of species with high levels of genetic diversity and deep phylogeographic breaks (e.g., Abrothrix hirta 34 ; A. longipilis 35 ; A. manni 36 ; A. olivacea 37 ; Loxondotomys micropus 38 ; Oligoryzomys longicaudatus 39 . Overall, these differences reflect the length of time that species have been resident in the area and their idiosyncratic responses to environmental events.…”

mentioning

confidence: 99%

“…Addressing these aspects could be considered as the next step to be taken once the pattern of genetic structure has been uncovered, given that this gap impedes to fully understand the evolutionary history of this species. A. olivacea has the broadest distribution among the sigmodontine rodents of Southern South America; see 43 , inhabiting a wide variety of ecosystems (e.g., Coastal desert, Mediterranean shrub, Valdivian and Magellanic forest, Patagonian steppe 44 ), and exhibiting different levels of mitochondrial genetic structure across its geographic range 37 , making an ideal model to study the effects of the environmental variability on the genetic differentiation of small mammal species. Considering the reviewed antecedents, the aim of this study was to address the implications of dynamism and variability of the environmental-climatic features of southern South America in structuring the mitochondrial variability of A. olivacea.…”

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confidence: 99%

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Climate influences the genetic structure and niche differentiation among populations of the olive field mouse Abrothrix olivacea (Cricetidae: Abrotrichini)

Quiroga-Carmona

D’Elı́a

2022

Sci Rep

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Even when environmental variation over time and space is commonly considered as an important driver of population divergence, few evaluations of intraspecific genetic variation explicitly assess whether observed structure has been caused by or is correlated with landscape heterogeneity. Several phylogeographic studies have characterized the mitochondrial diversity of Abrothrix olivacea, but none has incorporated landscape genetics analyses and ecological niche modeling, leaving a gap in the understanding of the species evolutionary history. Here, these aspects were addressed based on 186 single nucleotide polymorphisms, extracted from sequences of 801 bp of Cytb gene, gathered from 416 individuals collected at 103 localities in Argentina and Chile. Employing multivariate statistical analyses (gPCA, Mantel and Partial Mantel Tests, Procrustes Analysis, and RDA), associations between genetic differences and geographic and climatic distances were evaluated. Presence data was employed to estimate the potential geographic distribution of this species during historical and contemporary climatic scenarios, and to address differences among the climatic niches of their main mitochondrial lineages. The significant influence of landscape features in structuring mitochondrial variability was evidenced at different spatial scales, as well as the role of past climatic dynamics in driving geographic range shifts, mostly associated to Quaternary glaciations. Overall, these results suggest that throughout geographic range gene flow is unevenly influenced by climatic dissimilarity and the geographic distancing, and that studied lineages do not exhibit distributional signals of climatic niche conservatism. Additionally, genetic differentiation occurred by more complex evolutionary processes than mere disruption of gene flow or drift.

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confidence: 75%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Climate influences the genetic structure and niche differentiation among populations of the olive field mouse Abrothrix olivacea (Cricetidae: Abrotrichini)

Quiroga-Carmona

D’Elı́a

2022

Sci Rep

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Assessing Ecogeographic Rules in Two Sigmodontine Rodents along an Elevational Gradient in Central Chile

Valladares-Gómez,

Torres-Pérez,

Palma

2024

Animals

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Bergmann’s and Allen’s rules are two classic ecogeographic rules concerning the physiological mechanisms employed by endotherm vertebrates for heat conservation in cold environments, which correlate with adaptive morphological changes. Thus, larger body sizes (Bergmann’s rule) and shorter appendages and limbs (Allen’s rule) are expected in mammals inhabiting cold environments (higher latitudes). Both rules may also apply to elevational gradients, due to the decrease in external temperature as elevation increases. In this study, we evaluated whether these patterns were true in two coexisting sigmodontine rodents across an elevational gradient in central Chile. We analyzed whether the size of the skull, body, and appendages of Abrothrix olivacea (n = 70) and Phyllotis darwini (n = 58) correlated with elevation, as predicted by these rules in a range between 154 and 2560 m. Our data revealed weak support for the Bergmann and Allen predictions. Moreover, we observed opposite patterns when expectations of Bergmann’s rules were evaluated, whereas Allen’s rule just fitted for ear size in both rodent species. Our results suggest that morphological changes (cranial, body, and appendage sizes) may play a minor role in the thermoregulation of these two species at high elevations, although behavioral strategies could be more critical. Other ecological and environmental variables could explain the morphological trends observed in our study. These hypotheses should be assessed in future studies to consider the relative contribution of morphology, behavior, and physiological mechanisms to the thermal adaptation of these two rodent species at high elevations.

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The skull variation of the olive field mouseAbrothrix olivacea(Cricetidae: Abrotrichini) is localized and correlated to the ecogeographic features of its geographic distribution

Quiroga-Carmona

Teta

D’Elı́a

2023

PeerJ

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The relationship between phenotypic variation and landscape heterogeneity has been extensively studied to understand how the environment influences patterns of morphological variation and differentiation of populations. Several studies had partially addressed intraspecific variation in the sigmodontine rodent Abrothrix olivacea, focusing on the characterization of physiological aspects and cranial variation. However, these had been conducted based on geographically restricted populational samples, and in most cases, the aspects characterized were not explicitly contextualized with the environmental configurations in which the populations occurred. Here, the cranial variation of A. olivacea was characterized by recording twenty cranial measurements in 235 individuals from 64 localities in Argentina and Chile, which widely cover the geographic and environmental distribution of this species. The morphological variation was analyzed and ecogeographically contextualized using multivariate statistical analyses, which also included climatic and ecological variation at the localities where the individuals were sampled. Results indicate that the cranial variation of this species is mostly clustered in localized patterns associated to the types of environments, and that the levels of cranial differentiation are higher among the populations from arid and treeless zones. Additionally, the ecogeographical association of cranial size variation indicate that this species does not follow Bergmann’s rule and that island populations exhibit larger cranial sizes compared to their continental counterparts distributed at the same latitudes. These results suggest that cranial differentiation among the populations of this species is not homogeneous throughout its geographic distribution, and that the patterns of morphological differentiation are also not completely consistent with the patterns of genetic structuring that have been described recently. Finally, the analyses performed to ponder morphological differentiation among populations suggest that the contribution of genetic drift in the formation of these patterns can be ruled out among Patagonian populations, and that the selective effect imposed by the environment could better explain them.

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The Mitochondrial Genetic Diversity of the Olive Field Mouse Abrothrix olivacea (Cricetidae; Abrotrichini) is Latitudinally Structured Across Its Geographic Distribution

Cited by 3 publications

References 76 publications

Climate influences the genetic structure and niche differentiation among populations of the olive field mouse Abrothrix olivacea (Cricetidae: Abrotrichini)

Climate influences the genetic structure and niche differentiation among populations of the olive field mouse Abrothrix olivacea (Cricetidae: Abrotrichini)

Assessing Ecogeographic Rules in Two Sigmodontine Rodents along an Elevational Gradient in Central Chile

The skull variation of the olive field mouseAbrothrix olivacea(Cricetidae: Abrotrichini) is localized and correlated to the ecogeographic features of its geographic distribution

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