TY - JOUR
T1 - Structure and divergence of vocal traits in the Acorn Woodpecker (Melanerpes formicivorus)
AU - Zazueta-Algara, José De J.
AU - Sosa-López, J. Roberto
AU - Coro Arizmendi, María Del
AU - Navarro-Sigüenza, Adolfo G.
N1 - Publisher Copyright:
© 2022 Wilson Ornithological Society. All rights reserved.
PY - 2022/3/1
Y1 - 2022/3/1
N2 - Studies of geographic variation of bird vocalizations facilitate the understanding of species' divergence and evolutionary histories, as vocal traits vary in response to different factors including the environment, morphology, culture, and inheritance. The Acorn Woodpecker (Melanerpes formicivorus) is a non-passerine species of the family Picidae, and therefore its vocalizations are not acquired through learning. It is widely distributed throughout the Americas and exhibits distinctive morphological and genetic differences among the 7 allopatric subspecies, but little is known about geographic variation in the structure of its vocalizations and whether vocal variation corresponds with their genetic differences. We collected recordings throughout the species' range and assessed the frequency and temporal features of their most common calls to study geographic variation in vocalizations. Specifically, we tested whether divergence in vocal traits mirrored subspecies limits. Our results showed the formation of 2 vocal groups that do not reflect subspecies limits. The genetic divergence described in previous studies coincides with the vocal divergence found in this study, with 2 areas promoting the greatest divergence: the Isthmus of Tehuantepec and the Gulf of California. Previously described morphological variation in bill sizes also coincides with the vocal groups found in this study, in which large and small sizes are grouped separately.
AB - Studies of geographic variation of bird vocalizations facilitate the understanding of species' divergence and evolutionary histories, as vocal traits vary in response to different factors including the environment, morphology, culture, and inheritance. The Acorn Woodpecker (Melanerpes formicivorus) is a non-passerine species of the family Picidae, and therefore its vocalizations are not acquired through learning. It is widely distributed throughout the Americas and exhibits distinctive morphological and genetic differences among the 7 allopatric subspecies, but little is known about geographic variation in the structure of its vocalizations and whether vocal variation corresponds with their genetic differences. We collected recordings throughout the species' range and assessed the frequency and temporal features of their most common calls to study geographic variation in vocalizations. Specifically, we tested whether divergence in vocal traits mirrored subspecies limits. Our results showed the formation of 2 vocal groups that do not reflect subspecies limits. The genetic divergence described in previous studies coincides with the vocal divergence found in this study, with 2 areas promoting the greatest divergence: the Isthmus of Tehuantepec and the Gulf of California. Previously described morphological variation in bill sizes also coincides with the vocal groups found in this study, in which large and small sizes are grouped separately.
KW - Isthmus of Tehuantepec
KW - acoustic variation
KW - allopatry
KW - bioacoustics
KW - subspecies
UR - http://www.scopus.com/inward/record.url?scp=85129723326&partnerID=8YFLogxK
U2 - 10.1676/21-00066
DO - 10.1676/21-00066
M3 - Artículo
AN - SCOPUS:85129723326
SN - 1559-4491
VL - 134
SP - 1
EP - 18
JO - Wilson Journal of Ornithology
JF - Wilson Journal of Ornithology
IS - 1
ER -