Molecular Phylogeography of Abrothrix Olivaceus (Rodentia: Sigmodontinae) in Chile

Rodríguez‐Serrano, Enrique; Cancino, Ricardo A.; Palma, R. Eduardo

doi:10.1644/05-mamm-a-393r2.1

Cited by 35 publications

(41 citation statements)

References 30 publications

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“…Dispersal patterns in rodents vary greatly among species, for example, a southward postglacial dispersal in Abrothrix olivaceus (Smith et al . 2001; Rodríguez‐Serrano et al . 2006) vs. a northward dispersal in Oligoryzomys longicaudatus (Palma et al .…”

Section: Discussionmentioning

confidence: 99%

Pleistocene glaciation leaves deep signature on the freshwater crab Aegla alacalufi in Chilean Patagonia

Pérez‐Losada

Jara

et al. 2009

Molecular Ecology

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Quaternary glacial cycles have played an important role in shaping the biodiversity in temperate regions. This is well documented in Northern Hemisphere, but much less understood for Southern Hemisphere. We used mitochondrial DNA and nuclear elongation factor 1α intron sequences to examine the Pleistocene glacial impacts on the phylogeographical pattern of the freshwater crab Aegla alacalufi in Chilean Patagonia. Phylogenetic analyses, which separated the glaciated populations on eastern continent into a north group (seven populations) and a south group (one population), revealed a shallow phylogenetic structure in the north group but a deep one in the non-glaciated populations on western islands, indicating the significant influence of glaciation on these populations. Phylogenies also identified the Yaldad population on Chiloé Island as a potentially unrecognized new species. The non-glaciated populations showed higher among population genetic divergence than the glaciated ones, but lower population genetic diversity was not detected in the latter. The two glaciated groups, which diverged from the non-glaciated populations at ~96,800-29,500 years ago and ~104,200-73,800 years ago, respectively, seem to have different glacial refugia. Unexpectedly, the non-glaciated islands did not serve as refugia for them. Demographic expansion was detected in the glaciated north group, with a constant population increase after the last glacial maximum. Nested clade analyses suggest a possible colonization from western islands to eastern continent. After arriving on the continent and surviving the last glacial period there, populations likely have expanded from high to low altitude, following the flood of melting ice. Aegla alacalufi genetic diversity has been primarily affected by Pleistocene glaciation and minimally by drainage isolation.

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Section: Discussionmentioning

confidence: 99%

Pleistocene glaciation leaves deep signature on the freshwater crab Aegla alacalufi in Chilean Patagonia

Pérez‐Losada

Jara

et al. 2009

Molecular Ecology

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“…This molecular marker evolves twice as fast as Cytochrome b, and has been shown to be informative at the intraspecific level (Rodrı´guez-Serrano et al 2006).…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…(Rodrı´guez-Serrano et al 2006), we used the Hypervariable Domain I (HDI) of the mtDNA Control Region, including the same individuals of A. markhami used for Cyt b (subspecies: A. o. olivaceus; A. o. pencanus; A. o. brachiotis and A. o. xanthorhinus; see…”

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A new record and an evaluation of the phylogenetic relationships of Abrothrix olivaceus markhami (Rodentia: Sigmodontinae)

2008

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Recent phylogenetic studies of the subfamily of cricetid rodents (Sigmodntinae) have validated the taxonomic classification at the tribal level of the Andean Clade. It is possible that some endemic species from Patagonian South America are part of this new tribe, but previous studies have not evaluated this hypothesis due to the difficulty of obtaining samples. In this study, we evaluate the phylogenetic relationships of Akodon markhami (Pine, 1973), a species endemic to the Chilean Patagonia, using individuals recently captured at the type locality of this taxon. Our results indicate that this form of Akodon corresponds to a subspecies of Abrothrix olivaceus, and should be incorporated into the Andean Clade as a geographic race of this widely distributed species on the South American continent. Based on a molecular clock calibration, we dated the origin of this geographic race during the last glacial cycles of the Quaternary, as the result of a vicariant process.

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“…Evidence has also been found of multiple localities in Chile that served as refuges for some plant and animal lineages during the LGM, which generated events of post‐glacial recolonization (Premoli, Kitzberger & Veblen, ; Muellner et al ., ; Palma et al ., ; Himes, Gallardo & Kenagy, ; Victoriano et al ., ). Although, in Patagonia, phylogeographical studies are still scarce (Beheregaray, ; Sérsic et al ., ), it has been proposed that the biota currently found in this region would be the sink of a biota from lower latitudes as a result of recolonization after the LGM (Muellner et al ., ; Rodríguez‐Serrano, Cancino & Palma, ). However, recently Jakob, Martinez‐Meyer & Blattner () and Tremetsberger et al .…”

Section: Introductionmentioning

confidence: 99%

Consequences of the last glacial maximum onNyctelia confusa(Coleoptera: Tenebrionidae) in Patagonia

Zúñiga-Reinoso

Jerez

Avaria‐Llautureo

et al. 2015

Biol. J. Linn. Soc.

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The Last Glacial Maximum (LGM) has affected the population size and spatial distribution of a number of organisms in southern Patagonia. It has been hypothesized that species were able to persist in isolated refuges, which has generated processes of population expansion and genetic structure of populations after the LGM. In the present study, we evaluate these hypotheses and their association with local morphotypes in the endemic species Nyctelia confusa, a coleopteran that has low vagility and restricted distribution in the region. Accordingly, sixty‐nine specimens were sequenced for the gene for mitochondrial cytochrome c oxidase I. Effective population size was estimated through time, along with population structure and the phylogenetic signal of the morphs. The results suggest the existence of recent population expansion (10 Kyr BP), although there was no evidence of population structure or the phylogenetic signal for the described morphs. We propose that, during the LGM, N. confusa survived in multiple refuges, probably in the oriental slopes of the Andes range. The surviving populations would have expanded once the steppe was re‐established after the glaciers receded. This may have produced various secondary contact zones, homogenizing the genetic diversity, which would explain the observed pattern of panmixia. The morphological differentiation reported previously may be a result of local ecological adaptation not associated with the historical events of the LGM.

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Molecular Phylogeography of Abrothrix Olivaceus (Rodentia: Sigmodontinae) in Chile

Cited by 35 publications

References 30 publications

Pleistocene glaciation leaves deep signature on the freshwater crab Aegla alacalufi in Chilean Patagonia

Pleistocene glaciation leaves deep signature on the freshwater crab Aegla alacalufi in Chilean Patagonia

A new record and an evaluation of the phylogenetic relationships of Abrothrix olivaceus markhami (Rodentia: Sigmodontinae)

Consequences of the last glacial maximum onNyctelia confusa(Coleoptera: Tenebrionidae) in Patagonia

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