Effects of forest fragmentation on amazonian understory bird communities

Bierregaard, Richard O.; Lovejoy, Thomas Ε.

doi:10.1590/1809-43921989191241

Cited by 219 publications

(167 citation statements)

References 8 publications

Supporting

Mentioning

120

Contrasting

Unclassified

Order By: Relevance

“…Insetívoros especializados (como insetívoros de tronco e seguidores de correição) cuja captura em rede de neblina é significativa para áreas contínuas, reduz dramaticamente (BIERREGAARD et al 1992), como observado nesta pesquisa. Com o tempo, a maioria das espécies insetívoras presentes nesses fragmentos, que forrageiam em conjunto com outras espécies, desaparece em fragmentos menores de 10 hectares (POWELL 1985, BIERREGAARD & LOVEJOY 1989.…”

unclassified

Biologia de aves capturadas em um fragmento de Mata Atlântica, Igarassu, Pernambuco, Brasil

et al. 2007

View full text Add to dashboard Cite

Foram estudados alguns aspectos da biologia da avifauna do Refúgio Ecológico Charles Darwin, fragmento de 60 ha de Mata Atlântica, no município de Igarassu, Pernambuco. Objetivando obter informações acerca das espécies desse bioma, foram realizadas observações entre agosto de 1996 e julho de 1997 e capturas mensais utilizando redes de neblina, entre julho de 2003 e junho de 2004. Entre observações, capturas, recapturas e recuperações, foram registradas 151 espécies (31 famílias) para a área, onde 456 aves (53 espécies/25 famílias) foram capturadas com redes ornitológicas. Foram recuperadas 10 espécies (tempo de anilha de seis a oito anos). O número de capturas foi maior nos meses mais quentes. A maioria das espécies capturadas (52,8%) teve freqüência de ocorrência menor que 25%, sendo Manacus manacus (Linnaeus, 1766), Arremon taciturnus (Hermann, 1783), Neopelma pallescens (Lafresnaye, 1853) e Turdus leucomelas Vieillot, 1818 as mais freqüentes. Houve correlação significativa entre as análises dos valores médios entre massa corpórea e sexo, dados biométricos (medidas da asa, tarso e diâmetro do tarso) e sexo e entre mudas e estação do ano. O maior período com muda associada à placa de incubação foi de março a maio (pico em maio). Os resultados fortaleceram a imprevisibilidade dos efeitos das alterações ambientais na estrutura da comunidade de aves em longo prazo. Reforçam ainda que os desequilíbrios populacionais possam vir a aumentar as chances de extinção, sendo necessárias novas alternativas para a proteção da biodiversidade, sobretudo em fragmentos florestais.

show abstract

unclassified

Biologia de aves capturadas em um fragmento de Mata Atlântica, Igarassu, Pernambuco, Brasil

et al. 2007

View full text Add to dashboard Cite

show abstract

“…STOUFFER & BIERREGAARD (1995) found a striking reduction in both the number of individuals and number of species of understory insectivores after forest fragmentation and area isolation. BIERREGAARD & LOVEJOY (1989) also showed that insectivorous birds, which follow swarms of army ants, disappeared from forest fragments soon after their isolation from continuous forest. It has been also verified that H. poecilinotus abundance decreased in the 1 ha fragments, and that this species increased in the post-isolation data of the 10 ha fragments (HARPER 1989).…”

Section: Discussionmentioning

confidence: 95%

Effects of forest heterogeneity on occurrence and abundance of the scale-backed antbird, Hylophylax poecilinotus (Aves: Thamnophilidae), in the Amazon forest

Cintra

Cancelli

2008

Rev. Bras. Zool.

View full text Add to dashboard Cite

Recently, a significant number of studies on neotropical forest bird communities have focused on factors influencing their richness, abundance, and habitat selection. However, few of them have considered populations or individual species, and how habitat structure affects their distribution and abundance. In this study, we investigated how the combined effects of some forest structure components affect the occurrence and abundance of a resident bird species, the scale-backed antbird Hylophylax poecilinotus (Cabanis, 1847). We tested the null hypothesis of no difference between the variation in forest structure components at locations where birds occurred and at locations where they did not. In a pristine Terra Firme forest at the Ducke Reserve, Manaus, we recorded bird occurrence and abundance using mist nets in 56 transects (1 km long each) within a 9 x 9 km trail grid covering 6400 ha. Also in the same 56 transects, we set 50 x 50 m plots and recorded the following seven components of forest structure and landscape: 1) canopy opening, 2) leaf litter, 3) tree abundance, 4) logs, 5) snags, 6) streams, and 7) elevation. We evaluated their effects on avian occurrence and abundance by using models of Multiple Logistic Regression (for bird occurrence) and Multiple Linear Regression (for bird abundance). The results suggested that H. poecilinotus occurred significantly more often in lowland areas, in areas located farther away from streams, and in areas bearing thicker leaf litter. Hylophylax poecilinotus was also more abundant in lowland areas and in areas located further away from streams. Overall, the results indicated that environmental heterogeneity produced by variation in forest structure components affects habitat use by this bird species in the Amazon forest.

show abstract

“…Certain termites, leafhoppers, scale insects, aphids, aphid-tending ants , and light-loving butterflies (Brown and Hutchings 1997) increase near edges. Birds that forage in treefall gaps, such as some arboreal insectivores, hummingbirds, and habitat generalists, often become abundant near edges (Bierregaard and Lovejoy 1989, Bierregaard 1990, Stouffer and Bierregaard 1995a, 1995b. Frugivorous bats increase near edges, probably because such areas have higher fruit abundance than forest interiors (Kalko 1998).…”

Section: Edge Effectsmentioning

confidence: 99%

“…Large predators like jaguars (Panthera onca) and pumas {Puma concolor) traverse pastures and regrowth in the BDFFP study area, but would likely avoid these areas if hunters were present or human density was higher (Rabinowitz 2000). Some ant-following birds (Pithys albifrons, Gymnopithys rufigula, Dendrocincla merula) translocated into forest fragments where army ants are absent will cross clearings of 100-320 m to return to primary forest (Lovejoy et al 1986, Harper 1989), although clearings of only 100 m preclude their movements under normal circumstances (Bierregaard and Lovejoy 1989, Stouffer and Bierregaard 1995b, S.G. Laurance and Gomez 2005.…”

Section: Distance Effectsmentioning

confidence: 99%

Ecosystem decay of Amazonian forest fragments: implications for conservation

Laurance

Stability of Tropical Rainforest Margins

View full text Add to dashboard Cite

Effects of forest fragmentation on amazonian understory bird communities

Cited by 219 publications

References 8 publications

Biologia de aves capturadas em um fragmento de Mata Atlântica, Igarassu, Pernambuco, Brasil

Biologia de aves capturadas em um fragmento de Mata Atlântica, Igarassu, Pernambuco, Brasil

Effects of forest heterogeneity on occurrence and abundance of the scale-backed antbird, Hylophylax poecilinotus (Aves: Thamnophilidae), in the Amazon forest

Ecosystem decay of Amazonian forest fragments: implications for conservation

Contact Info

Product

Resources

About