Post-glacial East Asian origin of the alpine shrub Phyllodoce aleutica (Ericaceae) in Beringia

Hajime Ikeda, Valentin Yakubov, Vyacheslav Barkalov, Hiroaki Setoguchi

Research output: Contribution to journalArticle

Abstract

Aim: The ice-free area around the Bering Land Bridge, Beringia, has been noted as an important refugium of organisms preferring cold environments such as arctic-alpine plants throughout the Pleistocene climate oscillations. Although numerous phylogeographical studies have supported this refugium, recent studies have challenged the idea of a homogeneous refugium in Beringia. We aim to examine a novel scenario of the post-glacial colonization history of an alpine plant Phyllodoce aleutica in Beringia. Location: The Japanese Archipelago, the Kamchatka Peninsula, the Aleutian Islands, Alaska. Method: The range-wide genetic structure of P. aleutica was elucidated by sequencing 13 nuclear loci. The phylogeographical history was inferred using model-based approaches based on coalescent simulations together with the potential distributions predicted by ecological niche modelling. Results: Bayesian clustering and phylogenetic networks revealed that P. aleutica was divided into three geographically structured groups: the main island of the Japanese Archipelago, the northern island of the archipelago (Hokkaido) and Beringia, including eastern Hokkaido. The demographic history underlying the genetic structure and the potential distributions at present and during Last Glacial Maximum suggest that their divergence likely predated the last glacial period. Except for genetic admixture with the sister species Phyllodoce glanduliflora, populations in Alaska exhibited lower genetic diversity than those in East Asia and exclusively shared two widespread genotypes. Approximate Bayesian computation showed that a demographic model postulating post-glacial expansion into Alaska fit better than alternative models. Main conclusions: Our study suggests that P. aleutica in eastern Beringia originated through post-glacial colonization from East Asia, providing novel insight into the biogeographical history of alpine flora in Beringia.

Original languageEnglish
Pages (from-to)1261-1274
Number of pages14
JournalJournal of Biogeography
Volume45
Issue number6
DOIs
Publication statusPublished - Jun 1 2018

Fingerprint

Phyllodoce
Beringia
Ericaceae
Postglacial
shrub
shrubs
refuge habitats
alpine plants
East Asia
history
refugium
demographic statistics
archipelago
Japan
Aleutian Islands
genetic structure
colonization
oscillation
Arctic region
niches

Keywords

  • alpine plants
  • approximate Bayesian computation
  • Beringia
  • East Asia
  • ecological niche modelling
  • phylogeography

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Post-glacial East Asian origin of the alpine shrub Phyllodoce aleutica (Ericaceae) in Beringia. / Ikeda, Hajime; Yakubov, Valentin; Barkalov, Vyacheslav; Setoguchi, Hiroaki.

In: Journal of Biogeography, Vol. 45, No. 6, 01.06.2018, p. 1261-1274.

Research output: Contribution to journalArticle

Ikeda, Hajime ; Yakubov, Valentin ; Barkalov, Vyacheslav ; Setoguchi, Hiroaki. / Post-glacial East Asian origin of the alpine shrub Phyllodoce aleutica (Ericaceae) in Beringia. In: Journal of Biogeography. 2018 ; Vol. 45, No. 6. pp. 1261-1274.
@article{88a041a803dd409d89786276a42b872d,
title = "Post-glacial East Asian origin of the alpine shrub Phyllodoce aleutica (Ericaceae) in Beringia",
abstract = "Aim: The ice-free area around the Bering Land Bridge, Beringia, has been noted as an important refugium of organisms preferring cold environments such as arctic-alpine plants throughout the Pleistocene climate oscillations. Although numerous phylogeographical studies have supported this refugium, recent studies have challenged the idea of a homogeneous refugium in Beringia. We aim to examine a novel scenario of the post-glacial colonization history of an alpine plant Phyllodoce aleutica in Beringia. Location: The Japanese Archipelago, the Kamchatka Peninsula, the Aleutian Islands, Alaska. Method: The range-wide genetic structure of P. aleutica was elucidated by sequencing 13 nuclear loci. The phylogeographical history was inferred using model-based approaches based on coalescent simulations together with the potential distributions predicted by ecological niche modelling. Results: Bayesian clustering and phylogenetic networks revealed that P. aleutica was divided into three geographically structured groups: the main island of the Japanese Archipelago, the northern island of the archipelago (Hokkaido) and Beringia, including eastern Hokkaido. The demographic history underlying the genetic structure and the potential distributions at present and during Last Glacial Maximum suggest that their divergence likely predated the last glacial period. Except for genetic admixture with the sister species Phyllodoce glanduliflora, populations in Alaska exhibited lower genetic diversity than those in East Asia and exclusively shared two widespread genotypes. Approximate Bayesian computation showed that a demographic model postulating post-glacial expansion into Alaska fit better than alternative models. Main conclusions: Our study suggests that P. aleutica in eastern Beringia originated through post-glacial colonization from East Asia, providing novel insight into the biogeographical history of alpine flora in Beringia.",
keywords = "alpine plants, approximate Bayesian computation, Beringia, East Asia, ecological niche modelling, phylogeography",
author = "Hajime Ikeda and Valentin Yakubov and Vyacheslav Barkalov and Hiroaki Setoguchi",
year = "2018",
month = "6",
day = "1",
doi = "10.1111/jbi.13230",
language = "English",
volume = "45",
pages = "1261--1274",
journal = "Journal of Biogeography",
issn = "0305-0270",
publisher = "Wiley-Blackwell",
number = "6",

}

TY - JOUR

T1 - Post-glacial East Asian origin of the alpine shrub Phyllodoce aleutica (Ericaceae) in Beringia

AU - Ikeda, Hajime

AU - Yakubov, Valentin

AU - Barkalov, Vyacheslav

AU - Setoguchi, Hiroaki

PY - 2018/6/1

Y1 - 2018/6/1

N2 - Aim: The ice-free area around the Bering Land Bridge, Beringia, has been noted as an important refugium of organisms preferring cold environments such as arctic-alpine plants throughout the Pleistocene climate oscillations. Although numerous phylogeographical studies have supported this refugium, recent studies have challenged the idea of a homogeneous refugium in Beringia. We aim to examine a novel scenario of the post-glacial colonization history of an alpine plant Phyllodoce aleutica in Beringia. Location: The Japanese Archipelago, the Kamchatka Peninsula, the Aleutian Islands, Alaska. Method: The range-wide genetic structure of P. aleutica was elucidated by sequencing 13 nuclear loci. The phylogeographical history was inferred using model-based approaches based on coalescent simulations together with the potential distributions predicted by ecological niche modelling. Results: Bayesian clustering and phylogenetic networks revealed that P. aleutica was divided into three geographically structured groups: the main island of the Japanese Archipelago, the northern island of the archipelago (Hokkaido) and Beringia, including eastern Hokkaido. The demographic history underlying the genetic structure and the potential distributions at present and during Last Glacial Maximum suggest that their divergence likely predated the last glacial period. Except for genetic admixture with the sister species Phyllodoce glanduliflora, populations in Alaska exhibited lower genetic diversity than those in East Asia and exclusively shared two widespread genotypes. Approximate Bayesian computation showed that a demographic model postulating post-glacial expansion into Alaska fit better than alternative models. Main conclusions: Our study suggests that P. aleutica in eastern Beringia originated through post-glacial colonization from East Asia, providing novel insight into the biogeographical history of alpine flora in Beringia.

AB - Aim: The ice-free area around the Bering Land Bridge, Beringia, has been noted as an important refugium of organisms preferring cold environments such as arctic-alpine plants throughout the Pleistocene climate oscillations. Although numerous phylogeographical studies have supported this refugium, recent studies have challenged the idea of a homogeneous refugium in Beringia. We aim to examine a novel scenario of the post-glacial colonization history of an alpine plant Phyllodoce aleutica in Beringia. Location: The Japanese Archipelago, the Kamchatka Peninsula, the Aleutian Islands, Alaska. Method: The range-wide genetic structure of P. aleutica was elucidated by sequencing 13 nuclear loci. The phylogeographical history was inferred using model-based approaches based on coalescent simulations together with the potential distributions predicted by ecological niche modelling. Results: Bayesian clustering and phylogenetic networks revealed that P. aleutica was divided into three geographically structured groups: the main island of the Japanese Archipelago, the northern island of the archipelago (Hokkaido) and Beringia, including eastern Hokkaido. The demographic history underlying the genetic structure and the potential distributions at present and during Last Glacial Maximum suggest that their divergence likely predated the last glacial period. Except for genetic admixture with the sister species Phyllodoce glanduliflora, populations in Alaska exhibited lower genetic diversity than those in East Asia and exclusively shared two widespread genotypes. Approximate Bayesian computation showed that a demographic model postulating post-glacial expansion into Alaska fit better than alternative models. Main conclusions: Our study suggests that P. aleutica in eastern Beringia originated through post-glacial colonization from East Asia, providing novel insight into the biogeographical history of alpine flora in Beringia.

KW - alpine plants

KW - approximate Bayesian computation

KW - Beringia

KW - East Asia

KW - ecological niche modelling

KW - phylogeography

UR - http://www.scopus.com/inward/record.url?scp=85045837837&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85045837837&partnerID=8YFLogxK

U2 - 10.1111/jbi.13230

DO - 10.1111/jbi.13230

M3 - Article

AN - SCOPUS:85045837837

VL - 45

SP - 1261

EP - 1274

JO - Journal of Biogeography

JF - Journal of Biogeography

SN - 0305-0270

IS - 6

ER -