No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species

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The Strange-tailed Tyrant Alectrurus risora (Aves: Tyrannidae) is an endemic species of southern South American grasslands that suffered a 90% reduction of its original distribution due to habitat transformation. This has led the species to be classified as globally Vulnerable. By the beginning of t...

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Autores principales: Di Giacomo, A.S., Di Giacomo, A.G., Kliger, R., Reboreda, J.C., Tiedemann, R., Mahler, B.
Formato: JOUR
Materias:
Alectrurus risora
Aves
Tyrannidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09592709_v25_n2_p127_DiGiacomo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09592709_v25_n2_p127_DiGiacomo
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spelling todo:paper_09592709_v25_n2_p127_DiGiacomo2023-10-03T15:52:46Z No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species Di Giacomo, A.S. Di Giacomo, A.G. Kliger, R. Reboreda, J.C. Tiedemann, R. Mahler, B. Alectrurus risora Aves Tyrannidae The Strange-tailed Tyrant Alectrurus risora (Aves: Tyrannidae) is an endemic species of southern South American grasslands that suffered a 90% reduction of its original distribution due to habitat transformation. This has led the species to be classified as globally Vulnerable. By the beginning of the last century, populations were partially migratory and moved south during the breeding season. Currently, the main breeding population inhabits the Iberá wetlands in the province of Corrientes, north-east Argentina, where it is resident all year round. There are two remaining small populations in the province of Formosa, north-east Argentina, and in southern Paraguay, which are separated from the main population by the Parana-Paraguay River and its continuous riverine forest habitat. The populations of Corrientes and Formosa are separated by 300 km and the grasslands between populations are non-continuous due to habitat transformation. We used mtDNA sequences and eight microsatellite loci to test if there were evidences of genetic isolation between Argentinean populations. We found no evidence of genetic structure between populations (ΦST = 0.004, P = 0.32; Fst = 0.01, P = 0.06), which can be explained by either retained ancestral polymorphism or by dispersal between populations. We found no evidence for a recent demographic bottleneck in nuclear loci. Our results indicate that these populations could be managed as a single conservation unit on a regional scale. Conservation actions should be focused on preserving the remaining network of areas with natural grasslands to guarantee reproduction, dispersal and prevent further decline of populations. © 2014 BirdLife International. Fil:Di Giacomo, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Reboreda, J.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mahler, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09592709_v25_n2_p127_DiGiacomo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Alectrurus risora
Aves
Tyrannidae
spellingShingle Alectrurus risora
Aves
Tyrannidae
Di Giacomo, A.S.
Di Giacomo, A.G.
Kliger, R.
Reboreda, J.C.
Tiedemann, R.
Mahler, B.
No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
topic_facet Alectrurus risora
Aves
Tyrannidae
description The Strange-tailed Tyrant Alectrurus risora (Aves: Tyrannidae) is an endemic species of southern South American grasslands that suffered a 90% reduction of its original distribution due to habitat transformation. This has led the species to be classified as globally Vulnerable. By the beginning of the last century, populations were partially migratory and moved south during the breeding season. Currently, the main breeding population inhabits the Iberá wetlands in the province of Corrientes, north-east Argentina, where it is resident all year round. There are two remaining small populations in the province of Formosa, north-east Argentina, and in southern Paraguay, which are separated from the main population by the Parana-Paraguay River and its continuous riverine forest habitat. The populations of Corrientes and Formosa are separated by 300 km and the grasslands between populations are non-continuous due to habitat transformation. We used mtDNA sequences and eight microsatellite loci to test if there were evidences of genetic isolation between Argentinean populations. We found no evidence of genetic structure between populations (ΦST = 0.004, P = 0.32; Fst = 0.01, P = 0.06), which can be explained by either retained ancestral polymorphism or by dispersal between populations. We found no evidence for a recent demographic bottleneck in nuclear loci. Our results indicate that these populations could be managed as a single conservation unit on a regional scale. Conservation actions should be focused on preserving the remaining network of areas with natural grasslands to guarantee reproduction, dispersal and prevent further decline of populations. © 2014 BirdLife International.
format JOUR
author Di Giacomo, A.S.
Di Giacomo, A.G.
Kliger, R.
Reboreda, J.C.
Tiedemann, R.
Mahler, B.
author_facet Di Giacomo, A.S.
Di Giacomo, A.G.
Kliger, R.
Reboreda, J.C.
Tiedemann, R.
Mahler, B.
author_sort Di Giacomo, A.S.
title No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
title_short No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
title_full No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
title_fullStr No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
title_full_unstemmed No evidence of genetic variation in microsatellite and mitochondrial DNA markers among remaining populations of the Strange-tailed Tyrant Alectrurus risora, an endangered grassland species
title_sort no evidence of genetic variation in microsatellite and mitochondrial dna markers among remaining populations of the strange-tailed tyrant alectrurus risora, an endangered grassland species
url http://hdl.handle.net/20.500.12110/paper_09592709_v25_n2_p127_DiGiacomo
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AT digiacomoag noevidenceofgeneticvariationinmicrosatelliteandmitochondrialdnamarkersamongremainingpopulationsofthestrangetailedtyrantalectrurusrisoraanendangeredgrasslandspecies
AT kligerr noevidenceofgeneticvariationinmicrosatelliteandmitochondrialdnamarkersamongremainingpopulationsofthestrangetailedtyrantalectrurusrisoraanendangeredgrasslandspecies
AT reboredajc noevidenceofgeneticvariationinmicrosatelliteandmitochondrialdnamarkersamongremainingpopulationsofthestrangetailedtyrantalectrurusrisoraanendangeredgrasslandspecies
AT tiedemannr noevidenceofgeneticvariationinmicrosatelliteandmitochondrialdnamarkersamongremainingpopulationsofthestrangetailedtyrantalectrurusrisoraanendangeredgrasslandspecies
AT mahlerb noevidenceofgeneticvariationinmicrosatelliteandmitochondrialdnamarkersamongremainingpopulationsofthestrangetailedtyrantalectrurusrisoraanendangeredgrasslandspecies
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