The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest

Detalhes bibliográficos
Autor(a) principal: Barros, Obed G.
Data de Publicação: 2009
Outros Autores: Sobral Cintra, R. J. de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional do INPA
Texto Completo: https://repositorio.inpa.gov.br/handle/1/15288
Resumo: We investigated how forest structure affects the occurrence and abundance of three owl species: the crested owl Lophostrix cristata Daudin, 1800, the Amazon pygmy owl Glaucidium hardyi Vielliard, 1990, and the tawny-bellied screech owl Megascops watsonii Cassin, 1849. We surveyed the owls mostly between 07:00 and 11:00 pm from July 2001 to April 2002, in eighteen 8 km transects along trails at the Ducke Reserve, Manaus, Central Amazon, Brazil. We staked out 50 × 50 m plots where the presence and absence of the owls were recorded. We compared some compo-nents of the forest structure between plots where owls were present and plots where they were absent. The spatial variation in these components were related to the occurrence and abundance of the owls using models of multiple logistic and multiple linear regressions analysis, respectively. Lophostrix cristata is rare in many other areas of the Amazon forest, but it was the most abundant in our study area. Lophostrix cristata and G. hardyi were more concentrated along the uplands (central plateau), which divide the reserve into two drainage water-basins. Megascops watsonii was distrib-uted mainly in the southeastern part of the reserve. Glaucidium hardyi was more often found in areas with larger canopy openness. In areas with higher abundance of snags, there was significantly higher occurrence of L. cristata and M. watsonii. Megascops watsonii was also more abundant in areas with higher abundance of forest trees and in areas bearing shallower leaf litter on the forest floor. This study is the first to analyze at large spatial scale the effects of forest structure on neotropical forest top predator nocturnal birds. The results indicate that forest structure can affect the occurrence and abundance of owls in the Amazon forest.
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spelling Barros, Obed G.Sobral Cintra, R. J. de2020-05-07T14:22:50Z2020-05-07T14:22:50Z2009https://repositorio.inpa.gov.br/handle/1/1528810.1590/S1984-46702009000100014We investigated how forest structure affects the occurrence and abundance of three owl species: the crested owl Lophostrix cristata Daudin, 1800, the Amazon pygmy owl Glaucidium hardyi Vielliard, 1990, and the tawny-bellied screech owl Megascops watsonii Cassin, 1849. We surveyed the owls mostly between 07:00 and 11:00 pm from July 2001 to April 2002, in eighteen 8 km transects along trails at the Ducke Reserve, Manaus, Central Amazon, Brazil. We staked out 50 × 50 m plots where the presence and absence of the owls were recorded. We compared some compo-nents of the forest structure between plots where owls were present and plots where they were absent. The spatial variation in these components were related to the occurrence and abundance of the owls using models of multiple logistic and multiple linear regressions analysis, respectively. Lophostrix cristata is rare in many other areas of the Amazon forest, but it was the most abundant in our study area. Lophostrix cristata and G. hardyi were more concentrated along the uplands (central plateau), which divide the reserve into two drainage water-basins. Megascops watsonii was distrib-uted mainly in the southeastern part of the reserve. Glaucidium hardyi was more often found in areas with larger canopy openness. In areas with higher abundance of snags, there was significantly higher occurrence of L. cristata and M. watsonii. Megascops watsonii was also more abundant in areas with higher abundance of forest trees and in areas bearing shallower leaf litter on the forest floor. This study is the first to analyze at large spatial scale the effects of forest structure on neotropical forest top predator nocturnal birds. The results indicate that forest structure can affect the occurrence and abundance of owls in the Amazon forest.Volume 26, Número 1, Pags. 85-96Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessAvesGlaucidium (aves)Glaucidium HardyiLophostrixLophostrix CristataMegascopsOtus WatsoniiStrigidaeStrigiformesThe effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forestinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleZoologiaengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfapplication/pdf1536898https://repositorio.inpa.gov.br/bitstream/1/15288/1/artigo-inpa.pdfd470df3bee707a2c27b1aaa1782a2d31MD51CC-LICENSElicense_rdfapplication/octet-stream914https://repositorio.inpa.gov.br/bitstream/1/15288/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD521/152882020-07-14 11:04:11.659oai:repositorio:1/15288Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T15:04:11Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false
dc.title.en.fl_str_mv The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
title The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
spellingShingle The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
Barros, Obed G.
Aves
Glaucidium (aves)
Glaucidium Hardyi
Lophostrix
Lophostrix Cristata
Megascops
Otus Watsonii
Strigidae
Strigiformes
title_short The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
title_full The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
title_fullStr The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
title_full_unstemmed The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
title_sort The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
author Barros, Obed G.
author_facet Barros, Obed G.
Sobral Cintra, R. J. de
author_role author
author2 Sobral Cintra, R. J. de
author2_role author
dc.contributor.author.fl_str_mv Barros, Obed G.
Sobral Cintra, R. J. de
dc.subject.eng.fl_str_mv Aves
Glaucidium (aves)
Glaucidium Hardyi
Lophostrix
Lophostrix Cristata
Megascops
Otus Watsonii
Strigidae
Strigiformes
topic Aves
Glaucidium (aves)
Glaucidium Hardyi
Lophostrix
Lophostrix Cristata
Megascops
Otus Watsonii
Strigidae
Strigiformes
description We investigated how forest structure affects the occurrence and abundance of three owl species: the crested owl Lophostrix cristata Daudin, 1800, the Amazon pygmy owl Glaucidium hardyi Vielliard, 1990, and the tawny-bellied screech owl Megascops watsonii Cassin, 1849. We surveyed the owls mostly between 07:00 and 11:00 pm from July 2001 to April 2002, in eighteen 8 km transects along trails at the Ducke Reserve, Manaus, Central Amazon, Brazil. We staked out 50 × 50 m plots where the presence and absence of the owls were recorded. We compared some compo-nents of the forest structure between plots where owls were present and plots where they were absent. The spatial variation in these components were related to the occurrence and abundance of the owls using models of multiple logistic and multiple linear regressions analysis, respectively. Lophostrix cristata is rare in many other areas of the Amazon forest, but it was the most abundant in our study area. Lophostrix cristata and G. hardyi were more concentrated along the uplands (central plateau), which divide the reserve into two drainage water-basins. Megascops watsonii was distrib-uted mainly in the southeastern part of the reserve. Glaucidium hardyi was more often found in areas with larger canopy openness. In areas with higher abundance of snags, there was significantly higher occurrence of L. cristata and M. watsonii. Megascops watsonii was also more abundant in areas with higher abundance of forest trees and in areas bearing shallower leaf litter on the forest floor. This study is the first to analyze at large spatial scale the effects of forest structure on neotropical forest top predator nocturnal birds. The results indicate that forest structure can affect the occurrence and abundance of owls in the Amazon forest.
publishDate 2009
dc.date.issued.fl_str_mv 2009
dc.date.accessioned.fl_str_mv 2020-05-07T14:22:50Z
dc.date.available.fl_str_mv 2020-05-07T14:22:50Z
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dc.identifier.uri.fl_str_mv https://repositorio.inpa.gov.br/handle/1/15288
dc.identifier.doi.none.fl_str_mv 10.1590/S1984-46702009000100014
url https://repositorio.inpa.gov.br/handle/1/15288
identifier_str_mv 10.1590/S1984-46702009000100014
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.pt_BR.fl_str_mv Volume 26, Número 1, Pags. 85-96
dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivs 3.0 Brazil
http://creativecommons.org/licenses/by-nc-nd/3.0/br/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Zoologia
publisher.none.fl_str_mv Zoologia
dc.source.none.fl_str_mv reponame:Repositório Institucional do INPA
instname:Instituto Nacional de Pesquisas da Amazônia (INPA)
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instacron_str INPA
institution INPA
reponame_str Repositório Institucional do INPA
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