TY - JOUR
T1 - Avifaunal interchange across the Panamanian isthmus
T2 - Insights from Campylorhynchus wrens
AU - Barker, F. Keith
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/4
Y1 - 2007/4
N2 - The fossil record of mammals records a major interchange of northern and southern faunas in the New World, upon closure of the Panamanian isthmus approximately 3 Mya, termed the Great American Biotic Interchange (GABI). Due to their poor preservation in the fossil record, the degree of participation of birds in this interchange remains largely unknown. A phylogeny for wrens of the genus Campylorhynchus (Aves: Passeriformes) was reconstructed using DNA sequences from the mitochondrial control region and cytochrome b gene. This phylogeny, in combination with biogeographical inference and molecular clock methods, allows estimates of the importance of Late Pliocene interchange to the history of the group. Biogeographical reconstructions and divergence date estimates suggest that the genus began diversification in North America prior to closure of the Panamanian isthmus, consistent with a hypothesized North American origin for the family Troglodytidae. These reconstructions are consistent with pre-GABI dispersal of at most a single Campylorhynchus lineage into South America, with subsequent dispersal of additional lineages, probably across the fully formed isthmus. Increased sampling of avian taxa with widespread New World distributions will continue to clarify the timing and direction of continental interchange.
AB - The fossil record of mammals records a major interchange of northern and southern faunas in the New World, upon closure of the Panamanian isthmus approximately 3 Mya, termed the Great American Biotic Interchange (GABI). Due to their poor preservation in the fossil record, the degree of participation of birds in this interchange remains largely unknown. A phylogeny for wrens of the genus Campylorhynchus (Aves: Passeriformes) was reconstructed using DNA sequences from the mitochondrial control region and cytochrome b gene. This phylogeny, in combination with biogeographical inference and molecular clock methods, allows estimates of the importance of Late Pliocene interchange to the history of the group. Biogeographical reconstructions and divergence date estimates suggest that the genus began diversification in North America prior to closure of the Panamanian isthmus, consistent with a hypothesized North American origin for the family Troglodytidae. These reconstructions are consistent with pre-GABI dispersal of at most a single Campylorhynchus lineage into South America, with subsequent dispersal of additional lineages, probably across the fully formed isthmus. Increased sampling of avian taxa with widespread New World distributions will continue to clarify the timing and direction of continental interchange.
KW - Dispersal
KW - Great American Biotic Interchange
KW - Molecular clock
KW - Troglodytidae
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U2 - 10.1111/j.1095-8312.2007.00758.x
DO - 10.1111/j.1095-8312.2007.00758.x
M3 - Article
AN - SCOPUS:33947534580
SN - 0024-4066
VL - 90
SP - 687
EP - 702
JO - Biological Journal of the Linnean Society
JF - Biological Journal of the Linnean Society
IS - 4
ER -