Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/18062
Title: The role of physical barriers in the location of avian suture zones in the Guiana Shield, northern Amazonia
Authors: Naka, Luciano Nicol?s
Bechtoldt, Catherine L.
Magalli Pinto Henriques, L.
Brumfield, Robb Thomas
Keywords: Dna, Mitochondrial
Reduced Nicotinamide Adenine Dinucleotide Dehydrogenase
Avifauna
Comparative Study
Contact Zone
Geographical Distribution
Headwater
Hybrid Zone
Mountain Region
Phylogeography
Refugium
Speciation (biology)
Suture Zone
Synergism
Animals
Biological Model
Bird
Classification
Genetics
Genotype
Phenotype
Phylogeny
Phylogeography
River
South America
Tree
Animal
Birds
Dna, Mitochondrial
Genotype
Models, Genetic
Nadh Dehydrogenase
Phenotype
Phylogeny
Phylogeography
Rivers
South America
Trees
Amazonia
Guyana Shield
Aves
Issue Date: 2012
metadata.dc.publisher.journal: American Naturalist
metadata.dc.relation.ispartof: Volume 179, Número 4, Pags. E115-E132
Abstract: Suture zones represent natural forums in which to examine the role of geography and ecology in the speciation process. Here, we conduct a comparative analysis designed to investigate the location of avian phylogeographic breaks and contact zones in the Guiana Shield, northern Amazonia.We use distributional and genetic data from 78 pairs of avian taxa to address whether phylogeographic breaks and contact zones are associated with contemporary landscape features. Using spatially explicit statistical models, we found that phylogeographic breaks and contact zones are not randomly distributed throughout the landscape. In general, geographic breaks cluster along physical barriers (rivers, nonforested habitats, and small mountain ranges), whereas contact zones aggregate where these barriers either break down or are easier to overcome, such as around rivers' headwaters. Our results indicate that although major Amazonian rivers are often key determinants of taxon boundaries, the "riverine barrier effect" is a synergistic consequence of the wide lower reaches of some rivers, coupled with nonriverine landscape features at the headwaters. Our data suggest that ancestral refugia are not necessary to explain current distribution patterns and that pairs of codistributed taxa do not seem to be the result of simultaneous diversification processes. © 2012 by The University of Chicago.
metadata.dc.identifier.doi: 10.1086/664627
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