Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia
Biogeographic studies in Amazonia typically describe biodiversity across interfluvia, rarely within them, where geographic variability in morphological traits might be observed. We tested for intraspecific phenotypic variation in three bird species within the Purus–Madeira interfluvium (Central Amaz...
| Autor principal: | Abreu, F. H.T. de |
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| Outros Autores: | Schietti, Juliana, Anciães, Marina |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Evolutionary Ecology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16906 |
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oai:repositorio:1-16906 |
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oai:repositorio:1-16906 Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia Abreu, F. H.T. de Schietti, Juliana Anciães, Marina Biodiversity Biogeography Color Morph Correlation Dispersal Environmental Change Gene Flow Intraspecific Variation Local Adaptation Morphology Morphometry Neotropical Region Passerine Phenotype Phenotypic Plasticity Preference Behavior Sensory System Sexual Selection Spatial Variation Amazonia Brasil Madeira Basin Purus Basin Aves Passeriformes Tyranni Biogeographic studies in Amazonia typically describe biodiversity across interfluvia, rarely within them, where geographic variability in morphological traits might be observed. We tested for intraspecific phenotypic variation in three bird species within the Purus–Madeira interfluvium (Central Amazon) and whether phenotypes were correlated with environmental heterogeneity or geographic distance among sites. We compared coloration indexes derived from reflectance spectra and morphometrics of up to five adult individuals of each sex among 11 sites within the interfluvium and contrasted them with proxies for geographic distance and environmental variation (tree basal area and bird community). Environmental heterogeneity was minimally spatially autocorrelated, and there were no obvious geographical barriers to dispersal in the study region. The null hypothesis was that we would see either no phenotypic variation or random variation that was not explained by the tested variables. Half of the cases analyzed showed intraspecific morphological variation. Coloration varied more frequently than morphometrics, and color was better explained by environmental heterogeneity, particularly in males, whereas brightness also varied with geographic distance. Geographic distance explained the only case of variation in morphometrics. Our results indicate that coloration, particularly plumage brightness, is more labile than morphometric traits and that plumage color might be under stronger effects of local adaptation than brightness, which also seems to be under effects of neutral drift and gene flow among populations. Higher frequencies of association between male coloration and the environment suggest a role of non-arbitrary mechanisms of sexual selection on the expression of male phenotypes, whereas arbitrary intersexual selection might explain the randomly distributed variation that is not explained by environmental heterogeneity or geographic distance. We revealed intraspecific phenotypic variation in a spatial extent usually not considered in biogeographic studies in the Amazon and demonstrate that both local adaptation and neutral drift are important to explain intraspecific trait diversification at this geographical scale. © 2018, Springer International Publishing AG, part of Springer Nature. 2020-06-15T21:37:11Z 2020-06-15T21:37:11Z 2018 Artigo https://repositorio.inpa.gov.br/handle/1/16906 10.1007/s10682-018-9929-4 en Volume 32, Número 2-3, Pags. 191-214 Restrito Evolutionary Ecology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Biodiversity Biogeography Color Morph Correlation Dispersal Environmental Change Gene Flow Intraspecific Variation Local Adaptation Morphology Morphometry Neotropical Region Passerine Phenotype Phenotypic Plasticity Preference Behavior Sensory System Sexual Selection Spatial Variation Amazonia Brasil Madeira Basin Purus Basin Aves Passeriformes Tyranni |
| spellingShingle |
Biodiversity Biogeography Color Morph Correlation Dispersal Environmental Change Gene Flow Intraspecific Variation Local Adaptation Morphology Morphometry Neotropical Region Passerine Phenotype Phenotypic Plasticity Preference Behavior Sensory System Sexual Selection Spatial Variation Amazonia Brasil Madeira Basin Purus Basin Aves Passeriformes Tyranni Abreu, F. H.T. de Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia |
| topic_facet |
Biodiversity Biogeography Color Morph Correlation Dispersal Environmental Change Gene Flow Intraspecific Variation Local Adaptation Morphology Morphometry Neotropical Region Passerine Phenotype Phenotypic Plasticity Preference Behavior Sensory System Sexual Selection Spatial Variation Amazonia Brasil Madeira Basin Purus Basin Aves Passeriformes Tyranni |
| description |
Biogeographic studies in Amazonia typically describe biodiversity across interfluvia, rarely within them, where geographic variability in morphological traits might be observed. We tested for intraspecific phenotypic variation in three bird species within the Purus–Madeira interfluvium (Central Amazon) and whether phenotypes were correlated with environmental heterogeneity or geographic distance among sites. We compared coloration indexes derived from reflectance spectra and morphometrics of up to five adult individuals of each sex among 11 sites within the interfluvium and contrasted them with proxies for geographic distance and environmental variation (tree basal area and bird community). Environmental heterogeneity was minimally spatially autocorrelated, and there were no obvious geographical barriers to dispersal in the study region. The null hypothesis was that we would see either no phenotypic variation or random variation that was not explained by the tested variables. Half of the cases analyzed showed intraspecific morphological variation. Coloration varied more frequently than morphometrics, and color was better explained by environmental heterogeneity, particularly in males, whereas brightness also varied with geographic distance. Geographic distance explained the only case of variation in morphometrics. Our results indicate that coloration, particularly plumage brightness, is more labile than morphometric traits and that plumage color might be under stronger effects of local adaptation than brightness, which also seems to be under effects of neutral drift and gene flow among populations. Higher frequencies of association between male coloration and the environment suggest a role of non-arbitrary mechanisms of sexual selection on the expression of male phenotypes, whereas arbitrary intersexual selection might explain the randomly distributed variation that is not explained by environmental heterogeneity or geographic distance. We revealed intraspecific phenotypic variation in a spatial extent usually not considered in biogeographic studies in the Amazon and demonstrate that both local adaptation and neutral drift are important to explain intraspecific trait diversification at this geographical scale. © 2018, Springer International Publishing AG, part of Springer Nature. |
| format |
Artigo |
| author |
Abreu, F. H.T. de |
| author2 |
Schietti, Juliana Anciães, Marina |
| author2Str |
Schietti, Juliana Anciães, Marina |
| title |
Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia |
| title_short |
Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia |
| title_full |
Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia |
| title_fullStr |
Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia |
| title_full_unstemmed |
Spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the Purus–Madeira interfluvium, Central Amazonia |
| title_sort |
spatial and environmental correlates of intraspecific morphological variation in three species of passerine birds from the purus–madeira interfluvium, central amazonia |
| publisher |
Evolutionary Ecology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/16906 |
| _version_ |
1787141773735231488 |
| score |
11.755432 |