The origins and diversification of Holarctic brown bear populations inferred from genomes of past and present populations
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The origins and diversification of Holarctic brown bear populations inferred from genomes of past and present populations. / Segawa, Takahiro; Rey-Iglesia, Alba; Lorenzen, Eline D.; Westbury, Michael V.
In: Proceedings of the Royal Society B: Biological Sciences, Vol. 291, No. 2015, 20232411, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - The origins and diversification of Holarctic brown bear populations inferred from genomes of past and present populations
AU - Segawa, Takahiro
AU - Rey-Iglesia, Alba
AU - Lorenzen, Eline D.
AU - Westbury, Michael V.
PY - 2024
Y1 - 2024
N2 - The brown bear (Ursus arctos) is one of the survivors of the Late Quaternary megafauna extinctions. However, despite being widely distributed across the Holarctic, brown bears have experienced extensive range reductions, and even extirpations in some geographical regions. Previous research efforts using genetic data have provided valuable insights into their evolutionary history. However, most studies have been limited to contemporary individuals or mitochondrial DNA, limiting insights into population processes that preceded the present. Here, we present genomic data from two Late Pleistocene brown bears from Honshu, Japan and eastern Siberia, and combine them with published contemporary and ancient genomes from across the Holarctic range of brown bears to investigate the evolutionary relationships among brown bear populations through time and space. By including genomic data from Late Pleistocene and Holocene individuals sampled outside the current distribution range, we uncover diversity not present in contemporary populations. Notably, although contemporary individuals display geographically structured populations most likely driven by isolation-by-distance, this pattern varies among the ancient samples across different regions. The inclusion of ancient brown bears in our analysis provides novel insights into the evolutionary history of brown bears and contributes to understanding the populations and diversity lost during the Late Quaternary.
AB - The brown bear (Ursus arctos) is one of the survivors of the Late Quaternary megafauna extinctions. However, despite being widely distributed across the Holarctic, brown bears have experienced extensive range reductions, and even extirpations in some geographical regions. Previous research efforts using genetic data have provided valuable insights into their evolutionary history. However, most studies have been limited to contemporary individuals or mitochondrial DNA, limiting insights into population processes that preceded the present. Here, we present genomic data from two Late Pleistocene brown bears from Honshu, Japan and eastern Siberia, and combine them with published contemporary and ancient genomes from across the Holarctic range of brown bears to investigate the evolutionary relationships among brown bear populations through time and space. By including genomic data from Late Pleistocene and Holocene individuals sampled outside the current distribution range, we uncover diversity not present in contemporary populations. Notably, although contemporary individuals display geographically structured populations most likely driven by isolation-by-distance, this pattern varies among the ancient samples across different regions. The inclusion of ancient brown bears in our analysis provides novel insights into the evolutionary history of brown bears and contributes to understanding the populations and diversity lost during the Late Quaternary.
KW - brown bear
KW - demography
KW - evolution
KW - genome
KW - palaeogenome
U2 - 10.1098/rspb.2023.2411
DO - 10.1098/rspb.2023.2411
M3 - Journal article
C2 - 38264778
AN - SCOPUS:85183473135
VL - 291
JO - Proceedings of the Royal Society B: Biological Sciences
JF - Proceedings of the Royal Society B: Biological Sciences
SN - 0962-8452
IS - 2015
M1 - 20232411
ER -
ID: 381848812