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Willis, Edwin O.; Oniki, Yoshika

doi:10.1590/s0031-10492002000900001

Cited by 29 publications

(17 citation statements)

References 6 publications

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“…The theory explained the widespread pattern that islands surrounded by water hold fewer species the smaller they are and the more distant they are from mainland sources of immigrants (7,8). That forest fragments, habitat ''islands'' surrounded by a ''sea'' of cattle pastures (9), also hold few species is no longer controversial (10)(11)(12), but another question is pressing (13) and unanswered: How fast do fragments lose their species?…”

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confidence: 99%

Rates of species loss from Amazonian forest fragments

Ferraz

Russell

Stouffer

et al. 2003

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

296

260

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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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mentioning

confidence: 99%

Rates of species loss from Amazonian forest fragments

Ferraz

Russell

Stouffer

et al. 2003

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

296

260

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“…Christiansen & Pitter (1997) showed that almost 17% of all forest species were extinct from fragments in Lagoa Santa, southeastern Brazil (original data compiled from Krabbe [2007]), after 130 years. Willis & Oniki (2002), Ribon et al (2003) and Silveira (2009) reported similar percentages (20.4-30%) of forest bird extinctions for Santa Teresa and Santo André, southeastern Brazil, after 50, 70 and 106 years separating deforestation time-lags, respectively.…”

Section: Lophornis Chalybeus 1 3 Forestmentioning

confidence: 83%

Museum collections indicate bird defaunation in a biodiversity hotspot

et al. 2017

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Ipanema National Forest, southeastern Brazil, once contained 340 bird species. Forest cover suffered for centuries from log exploitation and, as a result, most of the remaining forests are now an impoverished subset of the original vegetation. We show how the bird community changed over time by comparing historical and recent records. Currently, 228 species can be recorded, for a compilation of 410 species, of which 359 are documented. Some 89 forest species with historical records failed to be detected in recent surveys. Of the 72 Atlantic Forest or Cerrado endemic species, no more than 29 (40%) are still found. The bird community changed from one which used to be related to coastline rain forests to another, which relates more to drier semideciduous forests of the interior.Keywords: Atlantic Forest, Cerrado, hierarchical cluster analysis, multivariate analysis, semideciduous forests. Coleções de museus indicam defaunação de aves em um hotspot de biodiversidadeResumo: A Floresta Nacional de Ipanema, sudeste do Brasil, já abrigou 340 espécies de aves. Sua cobertura florestal sofreu por séculos com a exploração de madeira e, desse modo, a maior parte da vegetação remanescente é uma sub-representação daquela original. Neste artigo é demonstrado como a comunidade de aves foi modificada com o passar do tempo por meio da comparação entre registros históricos e recentes. Atualmente, 228 espécies podem ser registradas, para um total de 410 espécies, das quais 359 possuem documentação. Das espécies registradas historicamente, 89 não foram mais detectadas. Das 72 espécies endêmicas da Mata Atlântica ou do Cerrado, apenas 29 (40%) ainda podem ser encontradas. A comunidade de aves, outrora similar à de florestas ombrófilas costeiras, atualmente é mais relaciona à comunidade de matas semideciduais mais secas do interior.

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“…al. 1999, WILLIS & ONIKI 2002, MENDONÇA & AN-JOS 2005, usando por vezes estes ambientes como extensão de sua área de forrageamento.…”

Section: Resultados E Discussão a Comunidadeunclassified

“…al. 1999, WILLIS & ONIKI 2002, MENDONÇA & AN-JOS 2005, usando por vezes estes ambientes como extensão de sua área de forrageamento.Houve correlação positiva (rs = -0,6788; p = 0,05) entre capturas e chuvas, e uma diferença significativa entre os indivíduos e espécies amostrados nas duas estações ( 2 = 104,35; p < 0,05). No período chuvoso foram detectadas 67 espécies, sendo as mais freqüentes Turdus leucomelas (n = 32; 10,77%), Turdus rufiventris (n = 21; 7,07%), Turdus albicollis (n = 18; 6,06%) e Thraupis sayaca (n = 17; 5,72%).…”

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Comunidade de aves de sub-bosque em uma área de entorno do Parque Nacional do Itatiaia, Rio de Janeiro, Brasil

2005

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Revista Brasileira de Zoologia 22 (4): 859-866, dezembro 2005Nas regiões tropicais os hábitats perturbados ou secundários são importantes para muitas espécies de aves, tanto residentes, como base permanente ou para uso de recursos em curto perí-odo (GILBERT 1980, LEVEY 1988a, b, BLAKE et al. 1990, BLAKE & LOISELLE 1991, como para migratórias (MARTIN 1985, HUTTO 1989, 1992, BLAKE & LOISELLE 1991, 1992 azil. azil. This study was conduced in a second growth woodland close to Itatiaia National Park (22º30'S e 44º30'W), Rio de Janeiro state, Brazil, and aimed to describe the understory bird community living in this area. We sampled three different vegetation types, reforestation, wood and orchard, through 19 field trips between 1984 and 1999. Birds were sampled by mist-netting and bird-banding, using from 15 to 31 12 x 2 36 mm mesh mistnets, and we also collected information on morphological (total, wing, bill, tail and tarsus length), and biological data (sex, age, reproduction and molt). After 5,621.79 net hours, we got 553 captures and 71 recaptures (12.8%); 417 individuals were banded and 65 hummingbirds were not, due to the absence of specific rings. The studied community was represented by 77 species and 18 families, showing a diversity index of H' = -1.59 and curve of new species tending to stabilization. The most well-represented families were Emberizidae (n = 21; 27.27%), and Tyrannidae (n = 15; 19.48%); the species with highest number of capture were Turdus leucomelas Vieillot, 1818 (n = 40; 9.59%) and Turdus rufiventris Vieillot, 1818 (n = 36; 8.63%). Six of the sampled species (7.8%) are endemic to Atlantic forest. In the rainy season we sampled 68 species, and in the dry season, 42; and the captures were correlated with rainfall (rS = -0.68; p = 0.05). The breeding season occurred from October to March, and also was correlated with the beginning of the rainy season (rS = -0.70; p = 0.05). KEY WORDS. Atlantic Forest, bird-banding, second growth woodland.RESUMO. Este trabalho foi realizado em mata secundária no Município de Itatiaia, Estado do Rio de Janeiro (22º30'S e 44º30'W) próximo ao Parque Nacional do Itatiaia, com o objeitvo de descrever a comunidade de aves ali presente. Foram amostrados três tipos vegetacionais distintos: reflorestamento, bosque e pomar, tendo sido realizadas 19 excursões entre 1984 e 1999. As aves foram amostradas através de capturas com redes de neblina e anilhamento, tendo sido utilizadas de 15 a 31 redes de 12 x 2 m e malha 36 mm. Foram também obtidas medidas morfométricas (comprimento total, asa, bico, cauda e tarso) e dados biológicos (sexo, idade reprodução e muda). Depois de 5.621,79 horas-rede, foi registrado um total de 553 capturas, com 71 recapturas (12,84%); 417 indivíduos foram anilhados, e 65 beija-flores deixaram de ser marcados por falta de anilhas específicas. A comunidade estudada esteve representada por 77 espécies e 18 famílias, apresentando índice de diversidade H' = -1,594 e a curva do coletor com tendência à estabilização. As famílias com maior número de es...

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[No Title Available]

Abstract: In uplands and lowlands of Santa Teresa, central Espírito

Cited by 29 publications

References 6 publications

Rates of species loss from Amazonian forest fragments

Rates of species loss from Amazonian forest fragments

Museum collections indicate bird defaunation in a biodiversity hotspot

Comunidade de aves de sub-bosque em uma área de entorno do Parque Nacional do Itatiaia, Rio de Janeiro, Brasil

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