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dc.contributor.authorFontana, Carla Suertegaraypt_BR
dc.contributor.authorChiarani, Eduardopt_BR
dc.contributor.authorMenezes, Luciana da Silvapt_BR
dc.contributor.authorAndretti, Christian B.pt_BR
dc.contributor.authorOverbeck, Gerhard Ernstpt_BR
dc.date.accessioned2021-05-26T04:36:19Zpt_BR
dc.date.issued2018pt_BR
dc.identifier.issn0103-5657pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/221512pt_BR
dc.description.abstractWe compared two methods routinely used to conduct bird community surveys: point counts and transects. Our aim was to look for differences between these two methods regarding detection of bird richness and abundances. Additionally, we analyzed if one of the methods provided higher correlation of bird data with vegetation structure as an important habitat descriptor. From September 2014 to January 2015, we surveyed birds in 264 point counts and 258 transects spread across the southern Brazilian grasslands. We conducted one method in direct sequence of the other, in the same place with the same observers and at the same weather conditions. We standardized data to eliminate the effort bias caused by area covered and time employed in each method. Total abundance of birds recorded by the two methods did not differ (point counts 4753 and transects 4436, P = 0.31), but we found a significant difference in species richness (point counts 187 and transects 173, P = 0.01). Abundance of birds sampled with the transect method showed a slightly higher correlation with vegetation height (r2 = 0.07; P = 0.004) than the point counts method (r2 = 0.03; P = 0.05). While results from both methods were similar, richness detection was more effective in point counts, indicating that this method might be more useful than it currently is. We discuss potential factors that may influence effectiveness of both methods and suggest issues that should be addressed in further research in order to develop standardized sampling methods for bird communities.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofArarajuba : Revista Brasileira de Ornitologia. Vol. 26, no. 2 (jun. 2018), p. 116-122pt_BR
dc.rightsOpen Accessen
dc.subjectPássarospt_BR
dc.subjectBrazilen
dc.subjectVegetaçãopt_BR
dc.subjectFixed-radius point-countsen
dc.subjectFixed-width transectsen
dc.subjectPastagempt_BR
dc.subjectSESA grasslandsen
dc.subjectStandard surveyen
dc.subjectVegetation parametersen
dc.titleBird surveys in grasslands: do different count methods present distinct results?pt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001120525pt_BR
dc.type.originNacionalpt_BR


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