The effects of forest structure on occurrence and abundance of three owl species (Aves: Strigidae) in the Central Amazon forest
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | |
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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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 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
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) instacron:INPA |
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