Comparative range use by three Atlantic Forest understorey bird species in relation to forest fragmentation

Hansbauer, Miriam M.; Storch, Ilse; Pimentel, Rafael; Metzger, Jean Paul

doi:10.1017/s0266467408005002

Cited by 54 publications

(61 citation statements)

References 40 publications

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“…If species do require specific nutrients found only in fruit resources, e.g. lipids, calcium, secondary metabolites (Bairlein 1996;O'Brien et al 1998;Bosque and Pacheco 2000;Tsahar et al 2003;Pierce and McWilliams 2004;Rode et al 2006), then as fruit resources become less available, or less consistently available, we should expect that species would either expand their home range size (Hansbauer et al 2008) thus decreasing population density or become locally extinct. In contrast, if species opportunistically consume fruits, then within human-altered land use types of structurally similar vegetation to forest (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Keel-billed Toucans, mean = 48 ha (Graham 2001a); White-throated Robins, mean = 26 ha (Cohen and Lindell 2005); Silver-throated Tanagers, mean = 16.7 ha (Sekercioglu et al 2007). However, only one study directly compared home range size between birds using the managed landscape versus undisturbed forest (Hansbauer et al 2008). Although Hansbauer et al (2008) evaluated three bird species in the heavily fragmented Brazilian Atlantic forest; the authors found that only the frugivorous species studied (Chiroxiphia caudata) displayed an increase in home range size in the fragmented forest: *12 ha in fragmented vs. *2 ha in undisturbed forest.…”

Section: Introductionmentioning

confidence: 99%

“…However, only one study directly compared home range size between birds using the managed landscape versus undisturbed forest (Hansbauer et al 2008). Although Hansbauer et al (2008) evaluated three bird species in the heavily fragmented Brazilian Atlantic forest; the authors found that only the frugivorous species studied (Chiroxiphia caudata) displayed an increase in home range size in the fragmented forest: *12 ha in fragmented vs. *2 ha in undisturbed forest. Although these results are compelling, factors responsible for this home range expansion are still unclear because detailed observations of bird activities were not studied.…”

Section: Introductionmentioning

confidence: 99%

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The value of fruit security for the conservation of a neotropical frugivore in human-dominated landscapes

Peters

Nibbelink

2011

Biodivers Conserv

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Understanding which habitat elements are critical for species' persistence in the human-dominated landscape is a fundamental challenge of conservation biology. In human-altered lands fruit can be less reliably available compared to intact forest, but it is unclear whether this affects generalist frugivores, the primary providers of the important ecosystem service of seed dispersal. Does the habitat element of fruit constancy influence the persistence of these species in human-altered lands? Radio-telemetry, foraging patterns and species incidence frequencies of a representative generalist frugivore, the Bluethroated Toucanet (Aulacorhynchus caeruleogularis) were used to examine the effect of fruit security, measured by a site's annual constancy of fruit energy availability (FEA). Toucanets were detected 20-30% more often in shade-grown coffee plantations with high fruit security (\40% of months with \1000 fruit calories). Despite the large size of this generalist frugivore, home range size was\2 ha, when estimated by the a-LoCoH method, regardless of whether the initial capture site was forest, coffee plantation with high fruit security or coffee plantation with low fruit security. However, home range size was larger for birds captured in low fruit security coffee plantations. Furthermore, birds captured in low fruit security coffee plantations spent more time in forest patches and windbreaks, while birds captured in high fruit security coffee plantations spent more time in coffee shade trees. The results of this study emphasize the important role that a tree species' contribution to annual FEA should be given in conservation applications within the tropical regions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The value of fruit security for the conservation of a neotropical frugivore in human-dominated landscapes

Peters

Nibbelink

2011

Biodivers Conserv

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“…As long as habitat resources are available, individuals may remain in their home patch, as movement is energy consuming and thus only a positive investment if the new patch provides an improved habitat quality (Robles & Ciudad 2012). Various studies have shown that smaller territories usually indicate higher habitat quality, while reduced habitat quality often leads to larger home ranges (Carey et al 1990, Hansbauer et al 2008. In addition, home-range sizes strongly depend on season most probably as a response on the availability of food resources (Wiktander et al 2001).…”

mentioning

confidence: 99%

Restricted movements and high site fidelity in three East African cloud-forest birds

Habel

Hillen²,

Schmitt

et al. 2015

J. Trop. Ecol.

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Species with specific habitat requirements often remain within their habitat and are characterized by a very sedentary behaviour. We used radio-tracking during a 3-wk campaign to investigate the home ranges and movements of three East African passerine bird species, all adapted to cloud-forest habitats: montane white-eye Zosterops poliogaster mbuluensis, stripe-cheeked greenbul Andropadus milanjensis and white-starred robin Pogonocichla stellata macarthuri. Individuals were observed in a forest-grassland mosaic on top of Chyulu Hills, south Kenya. Based on 15 individuals with a total of 1041 fixes, we found (1) that all three species show a sedentary behaviour restricted to their home forest patch; (2) least activity during the afternoon; and (3) re-colonization into its home patch after translocation into a nearby forest patch. Our findings underline that forest-specialist bird species of the tropics show high site fidelity despite their potential movement ability.Key Words: birds, cloud-forest fragments, home range, kernel density estimation, radio-tracking, site fidelity Dispersal ability and dispersal behaviour are of high relevance when analysing the population structure of a species and potential effects from landscape structures on biota (Jeltsch et al. 2013). Studies on the population structure of forest animal species underline the relevance of the size of the forest habitat, which strongly affect the dispersal behaviour of species, as shown for various bird species (Dolman et al. 2007, Githiru et al. 2007, Spanhove et al. 2009). Radio-tracking can give valuable information on movements, home-range sizes, site-fidelity and speciesspecific habitat demands.In this study, we conducted a radio-tracking analysis on three cloud-forest bird species, the montane white-eye Zosterops poliogaster (nomenclature after Zimmermann et al. 1996), stripe-cheeked greenbul Andropadus milanjensis and white-starred robin Pogonocichla stellata 1 Corresponding author. Email: Janchristianhabel@gmx.de macarthuri. We measured their daily movements during a 3-wk study. Our study was conducted in the centre of the Chyulu Hills National Park, south-eastern Kenya (2°59 S, 37°85 E). This mountain range consists of patches of pristine cloud forest embedded in a grassland matrix. The cloud-forest patches occur at higher altitudes of about 2000 m asl. The three study species occur in syntopy in East African cloud forests (cf. Bennun et al. 1996, Mulwa et al. 2007, like on top of the Chyulu Hills in south Kenya. Zosterops poliogaster forages in flocks consisting of some dozen individuals, while the two other species dwell solitary or in pairs. Based on these radio-tracking data, we analyse home range sizes, dispersal and site fidelity for the three study species. Pogonocichla stellata macarthuri is known to perform seasonal altitudinal movements (Zimmerman et al. 1996), and research in the Taita Hills (Kenya) showed that the species even ventures outside of forest (Aben et al. 2012(Aben et al. , 2014Mulwa et al. 2007 the Chyul...

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“…Por outro lado, a eficiência do uso de indicadores formados por métricas da paisagem para identificar áreas com maior integridade da composição da comunidade gera uma grande perspectiva na aplicação Os dados obtidos para o projeto no qual esta tese se insere mostram que as mudanças nos habitats de Mata Atlântica causadas pela ação humana levam à perda de espécies de diversos táxons Bragagnolo et al, 2007;Umetsu & Pardini, 2007;Bueno, 2008;Naxara, 2008;Condez, 2008;Espartosa, 2009), perda de diversidade genética , redução na capacidade de imigração e emigração de indivíduos entre fragmentos (Uezu et al, 2005;Umetsu et al, 2008;Boscolo et al, 2008;Hansbauer et al, 2008a;Hansbauer et al, 2008b), entre outras alterações. Ou seja, o uso de métricas indicadoras parece ser a forma mais simples, rápida e prática de se avaliar a importância de áreas para a conservação considerando que: (i) as mudanças nos habitats naturais levam à perda de integridade das comunidades; (ii) amostragens de curta duração produzem resultados pouco consistentes; (iii) as mudanças nos habitats causadas pela ação humana são em geral fortemente correlacionadas (de forma que não é necessário medir todas as variáveis para se obter um bom poder explicativo); e (iv) que a obtenção de métricas da paisagem é muito mais fácil e rápida do que a condução de trabalho de campo para se obter dados biológicos.…”

Section: Quais São Os Melhores Indicadores Das Mudanças Na Integridadunclassified

Conservação da comunidade de aves de sub-bosque em paisagens fragmentadas da Floresta Atlântica

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Comparative range use by three Atlantic Forest understorey bird species in relation to forest fragmentation

Cited by 54 publications

References 40 publications

The value of fruit security for the conservation of a neotropical frugivore in human-dominated landscapes

The value of fruit security for the conservation of a neotropical frugivore in human-dominated landscapes

Restricted movements and high site fidelity in three East African cloud-forest birds

Conservação da comunidade de aves de sub-bosque em paisagens fragmentadas da Floresta Atlântica

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