The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation

Aim The blue-fronted amazon (Amazona aestiva ) is a widely distributed Neotropical parrot with two recognized sub-species, which are mainly characterized by the colour of the shoulder. We explored mitochondrial DNA variability to determine how demographic processes and historical climatic fluctuatio...

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Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13669516_v15_n3_p459_Caparroz
http://hdl.handle.net/20.500.12110/paper_13669516_v15_n3_p459_Caparroz
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spelling paper:paper_13669516_v15_n3_p459_Caparroz2023-06-08T16:12:02Z The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation Amazona aestiva Amazona ochrocephala Conservation MtDNA Phylogeography Pleistocene bird climate effect conservation management demography evolutionary biology gene flow geographical distribution introgression mitochondrial DNA morphology phylogeography Pleistocene population structure savanna species conservation subspecies Argentina Brazil South America Amazona aestiva Amazona ochrocephala Aves Psittacidae Psittaciformes Aim The blue-fronted amazon (Amazona aestiva ) is a widely distributed Neotropical parrot with two recognized sub-species, which are mainly characterized by the colour of the shoulder. We explored mitochondrial DNA variability to determine how demographic processes and historical climatic fluctuations may have contributed to phylogeographical pattern and morphological variation of A. aestiva, and how this information could be useful to understand the evolutionary relationship of this species and the Amazona ochrocephala complex and to determine management units for conservation purposes. Location Brazil and north-eastern Argentina. Methods We analysed a fragment of COI gene of 78 A. aestiva and 27 A. ochrocephala. We computed a median-joining network, and the population structure of A. aestiva populations was assessed using a hierarchical analysis of nucleotide diversity. The mismatch distribution, Fu's Fastr-test of neutrality and R2 test were used to detect past population expansion. Results All A. aestiva haplotypes and A. ochrocephala subspecies from north-eastern and southern South America were recovered within the South American clade. Hierarchical analysis of nucleotide diversity of A. aestiva populations detected two geographical groups as obtained by median-joining network. These two A. aestiva groups showed evidence of a recent population expansion. The time of populations splitting estimated corresponding to the Middle Pleistocene. Main conclusions The two A. aestiva genetic groups identified in our analyses agree with the morphological variation, corresponding to named subspecies. These two A. aestiva groups have undergone a recent population expansion, with low gene flow between them. The expansion of savannah areas may have contributed to the population expansion of these two groups. We concluded that introgression after isolated diversification may better explain haplotype sharing between A. aestiva and A. ochrocephala subspecies. We suggest that management and conservation strategies should consider these two A. aestiva groups (or subspecies) as different management units and should maintain viable populations of these two management units. © 2008 Blackwell Publishing Ltd. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13669516_v15_n3_p459_Caparroz http://hdl.handle.net/20.500.12110/paper_13669516_v15_n3_p459_Caparroz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Amazona aestiva
Amazona ochrocephala
Conservation
MtDNA
Phylogeography
Pleistocene
bird
climate effect
conservation management
demography
evolutionary biology
gene flow
geographical distribution
introgression
mitochondrial DNA
morphology
phylogeography
Pleistocene
population structure
savanna
species conservation
subspecies
Argentina
Brazil
South America
Amazona aestiva
Amazona ochrocephala
Aves
Psittacidae
Psittaciformes
spellingShingle Amazona aestiva
Amazona ochrocephala
Conservation
MtDNA
Phylogeography
Pleistocene
bird
climate effect
conservation management
demography
evolutionary biology
gene flow
geographical distribution
introgression
mitochondrial DNA
morphology
phylogeography
Pleistocene
population structure
savanna
species conservation
subspecies
Argentina
Brazil
South America
Amazona aestiva
Amazona ochrocephala
Aves
Psittacidae
Psittaciformes
The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
topic_facet Amazona aestiva
Amazona ochrocephala
Conservation
MtDNA
Phylogeography
Pleistocene
bird
climate effect
conservation management
demography
evolutionary biology
gene flow
geographical distribution
introgression
mitochondrial DNA
morphology
phylogeography
Pleistocene
population structure
savanna
species conservation
subspecies
Argentina
Brazil
South America
Amazona aestiva
Amazona ochrocephala
Aves
Psittacidae
Psittaciformes
description Aim The blue-fronted amazon (Amazona aestiva ) is a widely distributed Neotropical parrot with two recognized sub-species, which are mainly characterized by the colour of the shoulder. We explored mitochondrial DNA variability to determine how demographic processes and historical climatic fluctuations may have contributed to phylogeographical pattern and morphological variation of A. aestiva, and how this information could be useful to understand the evolutionary relationship of this species and the Amazona ochrocephala complex and to determine management units for conservation purposes. Location Brazil and north-eastern Argentina. Methods We analysed a fragment of COI gene of 78 A. aestiva and 27 A. ochrocephala. We computed a median-joining network, and the population structure of A. aestiva populations was assessed using a hierarchical analysis of nucleotide diversity. The mismatch distribution, Fu's Fastr-test of neutrality and R2 test were used to detect past population expansion. Results All A. aestiva haplotypes and A. ochrocephala subspecies from north-eastern and southern South America were recovered within the South American clade. Hierarchical analysis of nucleotide diversity of A. aestiva populations detected two geographical groups as obtained by median-joining network. These two A. aestiva groups showed evidence of a recent population expansion. The time of populations splitting estimated corresponding to the Middle Pleistocene. Main conclusions The two A. aestiva genetic groups identified in our analyses agree with the morphological variation, corresponding to named subspecies. These two A. aestiva groups have undergone a recent population expansion, with low gene flow between them. The expansion of savannah areas may have contributed to the population expansion of these two groups. We concluded that introgression after isolated diversification may better explain haplotype sharing between A. aestiva and A. ochrocephala subspecies. We suggest that management and conservation strategies should consider these two A. aestiva groups (or subspecies) as different management units and should maintain viable populations of these two management units. © 2008 Blackwell Publishing Ltd.
title The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
title_short The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
title_full The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
title_fullStr The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
title_full_unstemmed The role of demography and climatic events in shaping the phylogeography of Amazona aestiva (Psittaciformes, Aves) and definition of management units for conservation
title_sort role of demography and climatic events in shaping the phylogeography of amazona aestiva (psittaciformes, aves) and definition of management units for conservation
publishDate 2009
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13669516_v15_n3_p459_Caparroz
http://hdl.handle.net/20.500.12110/paper_13669516_v15_n3_p459_Caparroz
_version_ 1768543574655238144