Effects of Roads on Movements by Understory Birds in Mixed-Species Flocks in Central Amazonian Brazil

Develey, Pedro F.; Stouffer, Philip C.

doi:10.1046/j.1523-1739.2001.00170.x

Cited by 177 publications

(148 citation statements)

References 29 publications

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“…However, the marginally significant differences between the distance of T. caerulescens territories to the road, and the average increase in the distances from territory centers to the road for the three species in the reproductive season, suggest some adverse effects of the road that were not detected here. In another study of the road effects on understory mixed-species flocks in the Amazon, three of five flocks were restricted to just one side of the road, but two other flocks had territories that spanned the roads (DEVELEY & STOUFFER 2001). In the same study, the authors reported that the roads (without canopy liking the two sides) formed territorial limits for the five flocks living in the area.…”

Section: 3mentioning

confidence: 93%

Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil

2006

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Territory size is an important ecological attribute of populations that has been considered a factor determines population density. Antbirds is a large group of mainly insectivorous Neotropical passerines, usually well represented in bird communities from forested landscapes in Neotropical region. Territory sizes for three Antbirds, Thamnophilus caerulescens (Vieillot, 1816) (Variable Antshrike), Dysithamnus mentalis (Temmink, 1823) (Plain Antvireo) e Pyriglena leucoptera (Vieillot, 1818) (White-shouldered Fire-eye), were mapped and their area estimated by the convex polygon method in a 50 ha forest fragment, in southeastern Brazil. The three species presented small territories of similar sizes (< 2 ha) both during the non-reproductive and the reproductive seasons of 2000-2001. Territories overlapped considerably among species but not intraspecifically. Territory sizes increased with body mass of the three species studied (P. leucoptera > T. caerulescens > D. mentalis). We failed to find any effect on territory size for the three species associated with forest edge or distance to the dirt road.

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Section: 3mentioning

confidence: 93%

Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil

2006

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“…Any cleared surface larger than a forest gap is a radically contrasting landscape feature likely to limit the movement of animals (15). This often results in well isolated forest fragments, where recolonization is too slow to compensate for local extinction on a management time scale.…”

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Rates of species loss from Amazonian forest fragments

Ferraz

Russell

Stouffer

et al. 2003

Proc. Natl. Acad. Sci. U.S.A.

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In the face of worldwide habitat fragmentation, managers need to devise a time frame for action. We ask how fast do understory bird species disappear from experimentally isolated plots in the Biological Dynamics of Forest Fragments Project, central Amazon, Brazil. Our data consist of mist-net records obtained over a period of 13 years in 11 sites of 1, 10, and 100 hectares. The numbers of captures per species per unit time, analyzed under different simplifying assumptions, reveal a set of species-loss curves. From those declining numbers, we derive a scaling rule for the time it takes to lose half the species in a fragment as a function of its area. A 10-fold decrease in the rate of species loss requires a 1,000-fold increase in area. Fragments of 100 hectares lose one half of their species in <15 years, too short a time for implementing conservation measures.

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“…No entanto, devido ao tempo de latência, muitas das espécies mantiveram-se na paisagem mesmo com a posterior redução do tamanho dos fragmentos e do aumento do grau de isolamento. (Develey & Stouffer, 2001;Uezu et al, 2005). Em um grau de isolamento intermediário, algumas migrações poderiam até aumentar a chance de permanência das espécies nos fragmentos e, por isso, gerar um tempo de latência maior (Hanski & Ovaskainen, 2002).…”

Section: O Limiar Da Fragmentação E O Tempo De Latênciaunclassified

Composição e estrutura da comunidade de aves na paisagem fragmentada do Pontal do Paranapanema

Uezu¹

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Effects of Roads on Movements by Understory Birds in Mixed-Species Flocks in Central Amazonian Brazil

Cited by 177 publications

References 29 publications

Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil

Territory size of three Antbirds (Aves, Passeriformes) in an Atlantic Forest fragment in southeastern Brazil

Rates of species loss from Amazonian forest fragments

Composição e estrutura da comunidade de aves na paisagem fragmentada do Pontal do Paranapanema

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