Aves de um fragmento de Mata Atlântica no alto Rio Doce, Minas Gerais: colonização e extinção

Faria, Christiana M. A.; Rodrigues, Marcos; Amaral, Frederico Q. do; Módena, Érica de Souza; Fernandes, Alexandre Macedo

doi:10.1590/s0101-81752006000400032

Cited by 24 publications

(16 citation statements)

References 12 publications

(2 reference statements)

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“…The bird fauna of Anchieta Island appears severely reduced when compared to adjacent mainland and forest fragments (GOERCK 1997, RIBON et al 2003, FARIA et al 2006), but it is in accordance to what has been found for other land-bridge islands in the Atlantic forest. The species abundances patterns may be quite different from the mainland because the community is dominated by a few hyperabundant species (RØV 1975,WIENS 1989.…”

Section: Discussionsupporting

confidence: 84%

Hyper abundant mesopredators and bird extinction in an Atlantic forest island

Galetti¹,

Bovendorp²,

Fadini³

et al. 2009

Zoologia (Curitiba, Impr.)

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ABSTRACT. Islands can serve as model systems for understanding how biological invasions affect native species. Here we examine the negative effects of mesopredator mammals on bird richness at Anchieta Island, an 826 ha offshore island in the coast of Brazil. Anchieta Island has the highest density of mammals of the entire Atlantic forest, especially nest predators such as marmosets and coatis, introduced more than 20 years ago. This indiscriminate introduction of mammals may have affected directly the bird community, nowadays represented by 100 species comprised mainly by watercrossing birds, being 73 forest-dwelling species. A small component of these remnant bird species nests in tree holes and on the forest floor, null model analysis suggest that birds within these two nest types are under-represented on Anchieta Island. All guilds were affected negatively, but "opportunist insectivorous/omnivorous". Experiments using artificial nests showed a predation of 73% of nests on the floor while only 26% on the mainland. Camera traps recorded predation by coatis, agoutis, and opossums. The restoration of the bird community on this island is highly constrained by the high density of hyper abundant nest predators.

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Section: Discussionsupporting

confidence: 84%

Hyper abundant mesopredators and bird extinction in an Atlantic forest island

Galetti¹,

Bovendorp²,

Fadini³

et al. 2009

Zoologia (Curitiba, Impr.)

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“…Three species of army ants ( Eciton burchelli, Eciton vagans , and Labidus praedator ) have been reported and 231 species of birds identified at our study site (Faria et al 2006). Mist‐netting and visual censuses of forest understory birds indicated that the most abundant birds in the area were White‐shouldered Fire‐eyes ( Pyriglena leucoptera ), White‐throated Spadebills ( Platyrhincus mystaceus ), and White‐bellied Warblers ( Basileuterus hypoleucus ; Faria et al 2006).…”

Section: Methodsmentioning

confidence: 99%

Birds and army ants in a fragment of the Atlantic Forest of Brazil

Faria

Rodrigues

2009

Journal of Field Ornithology

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Little is known about the birds associated with army‐ant swarms in the Brazilian Atlantic forest. Our objectives were to locate and monitor army‐ant swarms in the Atlantic rainforest of Brazil and to identify the species of birds that attended the swarms and exhibited bivouac‐checking behavior. From July 2004 to August 2005, we located 49 swarms of army ants, including 28 Eciton burchelli, 19 Labidus praedator, and 2 Eciton vagans swarms. No birds were present at 17 (35%) swarms. At 32 swarms where birds were present, 22 (69%) were E. burchelli swarms and 10 (31%) were L. praedator swarms. No birds were observed at the two E. vagans swarms. We identified 66 species of birds attending the swarms, but only 43 species were observed foraging on prey flushed by the ants. Eighteen of these species had not been previously reported to forage in association with army‐ant swarms. Most birds observed during our study attended army‐ant swarms opportunistically, with White‐shouldered Fire‐eyes (Pyriglena leucoptera) the only obligate ant follower. Our observations suggest that the arthropods and other organisms flushed by army ants represent an important food resource for several species of birds in the Atlantic forest ecosystem.

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“…It is estimated that the area harbors approximately 29 species of anurans (Bertoluci et al, 2009), 231 species of birds (Faria et al, 2006) and 46 species of mammals (Paglia et al, 2005). A large part of the reserve is covered by secondary arboreal vegetation of continuous canopy and large trees (Nunes and Pedralli, 1995).…”

Section: Study Areamentioning

confidence: 99%