Dataset Information

Complete mitochondrial genome of the Eurasian collared lemming Dicrostonyx torquatus Pallas, 1779 (Rodentia: Arvicolinae).

ABSTRACT: The complete mitochondrial genome the Eurasian collared lemming was obtained by using PCR amplification and capillary sequencing (GenBank accession no. KX066190). The collared lemming mitochondrial genome is 16,340 base pairs long and shows the gene order, contents and gene strand asymmetry typical for mammals. The mitogenome sequence provides an important new genomic resource for the collared lemming, which is a model study species in Arctic phylogeography and biotic history.

SUBMITTER: Fedorov VB

PROVIDER: S-EPMC5486970 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BackgroundGlobal temperature increased by approximately half a degree (Celsius) within the last 150 years. Even this moderate warming had major impacts on Earth's ecological and biological systems, especially in the Arctic where the magnitude of abiotic changes even exceeds those in temperate and tropical biomes. Therefore, understanding the biological consequences of climate change on high latitudes is of critical importance for future conservation of the species living in this habitat. The past 25,000 years can be used as a model for such changes, as they were marked by prominent climatic changes that influenced geographical distribution, demographic history and pattern of genetic variation of many extant species. We sequenced ancient and modern DNA of the collared lemming (Dicrostonyx torquatus), which is a key species of the arctic biota, from a single site (Pymva Shor, Northern Pre Urals, Russia) to see if climate warming events after the Last Glacial Maximum had detectable effects on the genetic variation of this arctic rodent species, which is strongly associated with a cold and dry climate.ResultsUsing three dimensional network reconstructions we found a dramatic decline in genetic diversity following the LGM. Model-based approaches such as Approximate Bayesian Computation and Markov Chain Monte Carlo based Bayesian inference show that there is evidence for a population decline in the collared lemming following the LGM, with the population size dropping to a minimum during the Greenland Interstadial 1 (Bølling/Allerød) warming phase at 14.5 kyrs BP.ConclusionOur results show that previous climate warming events had a strong influence on genetic diversity and population size of collared lemmings. Due to its already severely compromised genetic diversity a similar population reduction as a result of the predicted future climate change could completely abolish the remaining genetic diversity in this population. Local population extinctions of collared lemmings would have severe effects on the arctic ecosystem, as collared lemmings are a key species in the trophic interactions and ecosystem processes in the Arctic.

Dataset Information

Complete mitochondrial genome of the Eurasian collared lemming Dicrostonyx torquatus Pallas, 1779 (Rodentia: Arvicolinae).

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