Falconiformes assemblages in a fragmented landscape of the Atlantic Forest in Southern Brazil

Loures‐Ribeiro, Alan; Anjos, Luiz dos

doi:10.1590/s1516-89132006000100018

Cited by 13 publications

(6 citation statements)

References 27 publications

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“…Rupornis magnirostris was four times more abundant in pastures and plantations than in forests in sub-Andean forests (Renjifo 2001). It was also more abundant in grasslands than in forest fragments in the state of Paraná (Loures-Ribeiro and Anjos 2006). Herpetotheres cachinnans, an inhabitant of forest edge, cerrado and isolated trees (Sick 1997), occurred in three habitats but always in very low numbers.…”

Section: Discussionmentioning

confidence: 98%

Distribution patterns of diurnal raptors in open and forested habitats in south-eastern Brazil and the effects of urbanization

Eduardo¹,

Carvalho²,

Marini

2007

Bird Conservation International

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SummaryDiurnal raptors may be highly sensitive to anthropogenic disturbances. We evaluated the diversity and abundance of diurnal raptors at an Atlantic Forest-cerrado transition zone in relation to two habitat types (forest fragments and open habitats) and to urbanization, comparing natural open and forested habitats with corresponding habitats within a large urban area. We sampled 80 points, 20 in each of four habitats (semi-natural and urban forests, seminatural and urban open areas), during 12 months. Diurnal raptors recorded (21 species) included only three out of 10 species with some level of threat in the region. Forested habitats had more species (17) than open habitats (12). Urban areas had only 14 (67%) species, whereas seminatural areas had all 21 species. Diurnal raptors were as abundant in urban areas as in seminatural areas in spite of a loss in species richness in urban areas. A re-analysis without Caracara plancus showed that urban areas had a lower mean number of individuals per point than seminatural areas. Overall species richness usually fluctuated from 14 to 16 species, being slightly higher between January and May than in other months. Overall abundance of diurnal raptors was much higher during summer than during winter. Local extinction may have already occurred for some species of diurnal raptors in the region and will probably shortly include several others. At least C. plancus, a habitat generalist, requires further studies and eventually management actions, since it is able to reach high population numbers in urbanized areas. Furthermore, highly sensitive species that were not recorded require further investigation regarding their conservation status. ResumoRaptores diurnos podem ser altamente sensíveis a perturbaçõ es antropogênicas. Avaliamos a diversidade e a abundância de raptores diurnos em uma região de transição entre Floresta Atlântica e Cerrado em relação a dois tipos de hábitats (fragmentos florestais e hábitats abertos) e à urbanização, comparando hábitats abertos e florestais aos hábitats correspondentes dentro de uma área urbana. Amostramos 80 pontos, 20 em cada um dos quatro hábitats (florestas seminaturais e urbanas, áreas abertas semi-naturais e urbanas) durante 12 meses. Entre os raptores diurnos registrados (21 espécies) estão apenas três das 10 espécies com algum nível de ameaça na região. Mais espécies foram registradas nos hábitats florestados (17) do que nos hábitats abertos (12). Apenas 14 (67 %) espécies foram registradas nas áreas urbanas, enquanto as 21 espécies foram registradas nas áreas semi-naturais. Os raptores diurnos foram igualmente abundantes nas áreas urbanas e nas áreas semi-naturais independentemente da perda de espécies nas áreas urbanas. Uma nova análise sem Caracara plancus mostrou que as áreas urbanas tiveram um menor nú mero médio de indivíduos por ponto do que as áreas semi-naturais. A riqueza total de espécies foi de 14 e 16 espécies, em geral, sendo um pouco mais alta entre janeiro e maio do que Bird Conservation International (2007) 17:367...

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Section: Discussionmentioning

confidence: 98%

Distribution patterns of diurnal raptors in open and forested habitats in south-eastern Brazil and the effects of urbanization

Eduardo¹,

Carvalho²,

Marini

2007

Bird Conservation International

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“…Nesse cenário, essa região foi descaracterizada por atividades antrópicas através da supressão e fragmentação da vegetação primária, restando atualmente menos de 10% de sua cobertura original (STRAUBE; URBEN-FILHO, 2005). Originalmente recoberta pela Floresta Estacional Semidecidual, atualmente essa região é representada por áreas agrícolas e pastagens, além de pequenos e esparsos fragmentos lorestais que raramente excedem 300 ha (STRAUBE et al, 1996;ANJOS, 1998;ANJOS, 2006).…”

Section: Introductionunclassified

Aves de rapina (Cathartiformes, Accipitriformes, Strigiformes e Falconiformes) na Reserva Biológica das Perobas, Paraná, Brasil, e seu entorno

Menq¹,

Delariva

2015

Biotemas

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ResumoNas últimas décadas, o noroeste do Paraná sofreu uma drástica supressão e fragmentação de sua vegetação primária, restando atualmente pequenos e esparsos fragmentos lorestais. Nessa perspectiva, este estudo teve por objetivos inventariar e analisar a assembleia de aves de rapina (Cathartiformes, Accipitriformes, Strigiformes e Falconiformes) na Reserva Biológica das Perobas, uma unidade de conservação de 8.716 ha, a qual representa um dos últimos remanescentes com extensão signiicativa de Floresta Estacional Semidecidual no Paraná. Foi utilizado o método de contagem por pontos ixos, bem como pontos de escuta e playback, para amostrar as espécies de aves de rapina da reserva, entre junho de 2009 a janeiro de 2012, com esforço amostral total de 210 h. Ao todo, foram levantadas 25 espécies de rapinantes, valor que corresponde a 37% da riqueza conhecida para o Paraná. Entre os registros, três espécies merecem ser destacadas, Spizaetus melanoleucus, Asio lammeus e Strix virgata, listadas no atual Livro Vermelho da Fauna Ameaçada do Paraná e pouco documentadas na região. Cerca de 70% das espécies observadas apresentam hábitos associados a ambientes lorestais, enquanto que 30% estão associadas a áreas abertas, como as pastagens e as terras de cultivo no entorno da loresta. Esses resultados reairmam a importância dessa reserva para a conservação e manutenção de muitas espécies de aves, principalmente as raras e regionalmente ameaçadas de extinção. Palavras-chave: Asio lammeus; Avifauna; Floresta Estacional Semidecidual; Spizaetus melanoleucus; Strix virgata AbstractBirds of prey (Cathartiformes, Accipitriformes, Strigiformes e Falconiformes) in the Perobas Biological Reserve, Parana, Brazil, and its surroundings. In recent decades, the northwest of the state of Paraná, Brazil, has undergone a dramatic suppression and fragmentation of its primary vegetation, currently there remains small and sparse forest fragments. From this perspective, this study aimed to do an inventory of and analyze the assembly of birds of prey (Cathartiformes, Accipitriformes, Strigiformes, and Falconiformes) in the Perobas Biological Reserve, a conservation area of 8,716 ha, which represents one of the last remnants with signiicant extent of semideciduous seasonal forest in Paraná. The counting method by ixed sites, as well as

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“…In recent years, studies were published describing nests and breeding biology (e.g., Zilio and Mendonça-Lima 2012), diet (e.g., Scheibler 2007), taxonomy (e.g., Amaral et al 2009), migration (e.g., Cabanne and Seipke 2005), and distribution (e.g., Mendonça-Lima et al 2006;Meller and Bencke 2012), but much of the information comes from short-term studies or opportunistic observations. Data at the assemblage level (e.g., distributions, abundances, and habitat associations) are scarce and were usually collected in short-term studies (Azevedo et al 2003;Mañosa et al 2003;Loures-Ribeiro and Anjos 2006;Alencar-Carvalho and Marini 2007;Salvador-Jr and Silva 2009).…”

Section: Introductionmentioning

confidence: 99%

Raptor assemblages in grasslands of Southern Brazil: species richness and abundance and the influence of the survey method

et al. 2013

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Background: Raptor distributions and abundances are poorly known in southern Brazil. Given that raptors have low population densities, methods typically applied to census birds are usually inappropriate for surveying raptors. Roadside surveys allow large areas to be searched at a relatively low cost and are often applied to count raptors. We conducted eight paired roadside surveys (roadside point transects and roadside strip transects of 54.5~58.6 km long) to assess the species richness and abundance of raptors in two grassland landscapes of southern Brazil and to compare results of the two methods. −1 · h −1 ). No significant differences were found in relation to species richness, although five species were exclusively recorded with point transects versus one with strip transects. Conclusions: Roadside point transects may reduce bias due to differences in species detection caused by habitat features and in abundance estimates resulting from survey habitat being disproportional to their availability. Point counts may enhance the quality of the search for raptors in a surveyed area, increasing the detection probability. The choice of survey method depends on the objectives of the study, but our results favor the use of point transects rather than strip transects to survey raptors in open landscapes.

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Falconiformes assemblages in a fragmented landscape of the Atlantic Forest in Southern Brazil

Abstract: An ecological analysis focused on distribution of Falconiformes

Cited by 13 publications

References 27 publications

Distribution patterns of diurnal raptors in open and forested habitats in south-eastern Brazil and the effects of urbanization

Distribution patterns of diurnal raptors in open and forested habitats in south-eastern Brazil and the effects of urbanization

Aves de rapina (Cathartiformes, Accipitriformes, Strigiformes e Falconiformes) na Reserva Biológica das Perobas, Paraná, Brasil, e seu entorno

Raptor assemblages in grasslands of Southern Brazil: species richness and abundance and the influence of the survey method

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