Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora

The north-east of Argentina contains a high number of globally threatened grassland birds and is increasingly managed for livestock, with annual burning in remaining natural grasslands. The Strange-tailed Tyrant Alectrurus risora, a globally threatened grassland specialist, has suffered a 90% contra...

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Autores principales: Di Giacomo, A.G., Di Giacomo, A.S., Reboreda, J.C.
Formato: JOUR
Materias:
bird
breeding population
breeding season
burning
clutch size
environmental monitoring
grassland
nesting
reproductive success
survival
Argentina
Formosa [Argentina]
Alectrurus risora
Aves
Imperata brasiliensis
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09592709_v21_n4_p411_DiGiacomo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09592709_v21_n4_p411_DiGiacomo
record_format dspace
spelling todo:paper_09592709_v21_n4_p411_DiGiacomo2023-10-03T15:52:43Z Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora Di Giacomo, A.G. Di Giacomo, A.S. Reboreda, J.C. bird breeding population breeding season burning clutch size environmental monitoring grassland nesting reproductive success survival Argentina Formosa [Argentina] Alectrurus risora Aves Imperata brasiliensis The north-east of Argentina contains a high number of globally threatened grassland birds and is increasingly managed for livestock, with annual burning in remaining natural grasslands. The Strange-tailed Tyrant Alectrurus risora, a globally threatened grassland specialist, has suffered a 90% contraction in its original range. From 1996 to 2008 we monitored a breeding population in Formosa, north-east Argentina, and explored the effect on breeding of four accidental and one prescribed fires. The plant most frequently used for nesting was Imperata brasiliensis, but the frequency of use was lower after a fire than before. In years with a fire, the height of the plant used for nesting and the height of the nest were lower than in those without a fire. Females avoided nesting in the burned plot in the breeding season immediately after the prescribed fire, but they started to return to the burned plot by the second breeding season and did not discriminate between plots by the third breeding season after the fire. Movements of females after the prescribed fire did not affect nest survival, clutch size, hatchability or chick survival indicating this species was adapted to regular fires. However, our results also show that annual burning in the grassland negatively affects the settlement for reproduction of Strange-tailed Tyrants and that the intervals between burns in the same grassland should be longer than two years. © 2011 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09592709_v21_n4_p411_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 bird
breeding population
breeding season
burning
clutch size
environmental monitoring
grassland
nesting
reproductive success
survival
Argentina
Formosa [Argentina]
Alectrurus risora
Aves
Imperata brasiliensis
spellingShingle bird
breeding population
breeding season
burning
clutch size
environmental monitoring
grassland
nesting
reproductive success
survival
Argentina
Formosa [Argentina]
Alectrurus risora
Aves
Imperata brasiliensis
Di Giacomo, A.G.
Di Giacomo, A.S.
Reboreda, J.C.
Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora
topic_facet bird
breeding population
breeding season
burning
clutch size
environmental monitoring
grassland
nesting
reproductive success
survival
Argentina
Formosa [Argentina]
Alectrurus risora
Aves
Imperata brasiliensis
description The north-east of Argentina contains a high number of globally threatened grassland birds and is increasingly managed for livestock, with annual burning in remaining natural grasslands. The Strange-tailed Tyrant Alectrurus risora, a globally threatened grassland specialist, has suffered a 90% contraction in its original range. From 1996 to 2008 we monitored a breeding population in Formosa, north-east Argentina, and explored the effect on breeding of four accidental and one prescribed fires. The plant most frequently used for nesting was Imperata brasiliensis, but the frequency of use was lower after a fire than before. In years with a fire, the height of the plant used for nesting and the height of the nest were lower than in those without a fire. Females avoided nesting in the burned plot in the breeding season immediately after the prescribed fire, but they started to return to the burned plot by the second breeding season and did not discriminate between plots by the third breeding season after the fire. Movements of females after the prescribed fire did not affect nest survival, clutch size, hatchability or chick survival indicating this species was adapted to regular fires. However, our results also show that annual burning in the grassland negatively affects the settlement for reproduction of Strange-tailed Tyrants and that the intervals between burns in the same grassland should be longer than two years. © 2011 BirdLife International.
format JOUR
author Di Giacomo, A.G.
Di Giacomo, A.S.
Reboreda, J.C.
author_facet Di Giacomo, A.G.
Di Giacomo, A.S.
Reboreda, J.C.
author_sort Di Giacomo, A.G.
title Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora
title_short Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora
title_full Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora
title_fullStr Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora
title_full_unstemmed Effects of grassland burning on reproductive success of globally threatened Strange-tailed Tyrants Alectrurus risora
title_sort effects of grassland burning on reproductive success of globally threatened strange-tailed tyrants alectrurus risora
url http://hdl.handle.net/20.500.12110/paper_09592709_v21_n4_p411_DiGiacomo
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AT reboredajc effectsofgrasslandburningonreproductivesuccessofgloballythreatenedstrangetailedtyrantsalectrurusrisora
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