Population genomics of the island thrush elucidates one of earth's great archipelagic radiations
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Population genomics of the island thrush elucidates one of earth's great archipelagic radiations. / Hart Reeve, Andrew; Gower, Graham; Pujolar, José Martín; Smith, Brian Tilston; Petersen, Bent; Olsson, Urban; Haryoko, Tri; Koane, Bonny; Maiah, Gibson; Blom, Mozes P. K.; Ericson, Per G. P.; Irestedt, Martin; Racimo, Fernando; Jønsson, Knud Andreas.
In: Evolution Letters, Vol. 7, No. 1, 2023, p. 24-36.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Population genomics of the island thrush elucidates one of earth's great archipelagic radiations
AU - Hart Reeve, Andrew
AU - Gower, Graham
AU - Pujolar, José Martín
AU - Smith, Brian Tilston
AU - Petersen, Bent
AU - Olsson, Urban
AU - Haryoko, Tri
AU - Koane, Bonny
AU - Maiah, Gibson
AU - Blom, Mozes P. K.
AU - Ericson, Per G. P.
AU - Irestedt, Martin
AU - Racimo, Fernando
AU - Jønsson, Knud Andreas
N1 - Publisher Copyright: © 2023 The Author(s).
PY - 2023
Y1 - 2023
N2 - Tropical islands are renowned as natural laboratories for evolutionary study. Lineage radiations across tropical archipelagos are ideal systems for investigating how colonization, speciation, and extinction processes shape biodiversity patterns. The expansion of the island thrush across the Indo-Pacific represents one of the largest yet most perplexing island radiations of any songbird species. The island thrush exhibits a complex mosaic of pronounced plumage variation across its range and is arguably the world's most polytypic bird. It is a sedentary species largely restricted to mountain forests, yet it has colonized a vast island region spanning a quarter of the globe. We conducted a comprehensive sampling of island thrush populations and obtained genome-wide SNP data, which we used to reconstruct its phylogeny, population structure, gene flow, and demographic history. The island thrush evolved from migratory Palearctic ancestors and radiated explosively across the Indo-Pacific during the Pleistocene, with numerous instances of gene flow between populations. Its bewildering plumage variation masks a biogeographically intuitive stepping stone colonization path from the Philippines through the Greater Sundas, Wallacea, and New Guinea to Polynesia. The island thrush's success in colonizing Indo-Pacific mountains can be understood in light of its ancestral mobility and adaptation to cool climates; however, shifts in elevational range, degree of plumage variation and apparent dispersal rates in the eastern part of its range raise further intriguing questions about its biology.
AB - Tropical islands are renowned as natural laboratories for evolutionary study. Lineage radiations across tropical archipelagos are ideal systems for investigating how colonization, speciation, and extinction processes shape biodiversity patterns. The expansion of the island thrush across the Indo-Pacific represents one of the largest yet most perplexing island radiations of any songbird species. The island thrush exhibits a complex mosaic of pronounced plumage variation across its range and is arguably the world's most polytypic bird. It is a sedentary species largely restricted to mountain forests, yet it has colonized a vast island region spanning a quarter of the globe. We conducted a comprehensive sampling of island thrush populations and obtained genome-wide SNP data, which we used to reconstruct its phylogeny, population structure, gene flow, and demographic history. The island thrush evolved from migratory Palearctic ancestors and radiated explosively across the Indo-Pacific during the Pleistocene, with numerous instances of gene flow between populations. Its bewildering plumage variation masks a biogeographically intuitive stepping stone colonization path from the Philippines through the Greater Sundas, Wallacea, and New Guinea to Polynesia. The island thrush's success in colonizing Indo-Pacific mountains can be understood in light of its ancestral mobility and adaptation to cool climates; however, shifts in elevational range, degree of plumage variation and apparent dispersal rates in the eastern part of its range raise further intriguing questions about its biology.
KW - colonization
KW - gene flow
KW - great speciator
KW - island biogeography
KW - mountains
KW - passerine birds
KW - phylogeny
KW - Pleistocene climate changes
U2 - 10.1093/evlett/qrac006
DO - 10.1093/evlett/qrac006
M3 - Journal article
C2 - 37065434
AN - SCOPUS:85149213094
VL - 7
SP - 24
EP - 36
JO - Evolution Letters
JF - Evolution Letters
SN - 2056-3744
IS - 1
ER -
ID: 370574457