Mamíferos E Palmeiras Neotropicais: Interações Em Paisagens Fragmentadas

Andreazzi, Cecilia S.; Pires, Alexandra S.; Fernandez, Fernando A. S.

doi:10.4257/oeco.2009.1304.02

Cited by 36 publications

(48 citation statements)

References 124 publications

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“…A origem de fragmentos em mosaico, pequenos e isolados, é consequência da diminuição da vegetação autóctone e superexploração da terra (ANDREAZZI et al, 2009). Essas áreas, antes contínuas, foram reduzidas ou subdivididas em áreas menores, encadeando uma supressão da vegetação e a completa imersão em matrizes não-florestais (PRIMACK; RODRIGUES, 2001).…”

Section: Introductionunclassified

Efeito De Borda Em Remanescentes De Floresta Atlântica Na Bacia Do Rio Tapacurá, Pernambuco

Oliveira

Marangon

Feliciano

et al. 2015

CERNE

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EFEITO DE BORDA EM REMANESCENTES DE FLORESTA ATLÂNTICA NA BACIA DO RIO TAPACURÁ, PERNAMBUCO RESUMO: Neste trabalho objetivou-se avaliar o efeito de borda sobre o componente arbóreo em dois fragmentos de Floresta Atlântica na Bacia do Rio Tapacurá-PE. Para amostragemdo componente adulto, foram plotadas 15 parcelas de 10 x 25 m e subparcelas de 1 x 25 m para a regeneração. As parcelas foram dispostas em três ambientes, cada uma com cinco unidades amostrais, conforme distância da borda. As comparações entre os ambientes foram realizadas por meio da composição de espécies, Diagrama de Venn e análise de agrupamento. A maior riqueza foi observada na área mais distante da borda e o maior número de indivíduos próximo à borda. Na Mata da Onça, os ambientes mais distantes da borda foram similares, porém são diferentes em composição e em estrutura, quando comparados com o ambiente mais próximo da margem do fragmento. Contudo, na Mata da Buchada, os dois primeiros ambientes próximos à borda foram similares. A interação, entre o ambiente antrópico e o fragmento, causa efeitos sobre a comunidade arbóreas áreas mais limítrofes do fragmento. EDGE EFFECT IN ATLANTIC FOREST REMNANTS IN THE WATERSHED OF THE RIVER TAPACURÁ, PERNAMBUCOABSTRACT: The objective of this study was to evaluate the edge effect on arboreal component of two Atlantic Forest fragments, in the Watershed of Tapacurá River, Pernambuco. For the sampling of the adult component 15 plots of 10 x 25 m were plotted and subplots of 1 x 25 m for the regeneration. The plots were arranged in three environments, with five sampling units each, according to distance from the edge. Comparisons between the environments were performed by specie composition, Venn diagram and cluster analysis. The greatest richness was observed in the area farther from the edge and the greatest number of individuals near the edge. In the Mata da Onça, the farthest edge environments were similar, but different in composition and structure as compared to the nearest environment. However, in the Mata da Buchada the first two environments near to the edge were similar. The interaction between the human environment and the fragment affects the arboreal community in the fragment edges.

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Section: Introductionunclassified

Efeito De Borda Em Remanescentes De Floresta Atlântica Na Bacia Do Rio Tapacurá, Pernambuco

Oliveira

Marangon

Feliciano

et al. 2015

CERNE

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“…Small rodents (Trinomys spp. ), squirrels (Guerlinguetus ingrami Thomas), and collared peccaries (Pecari tajacu L.) are reported consumers of these fruits (Andreazzi et al 2009;Donatti et al 2009;Pires & Galetti 2012). Among invertebrates, bruchine and scolytine beetles are the most important seed predators (Dracxler et al 2011).…”

Section: Studied Speciesmentioning

confidence: 99%

“…For large-seeded species (≥1.5 cm, Tabarelli & Peres 2002), such as those from the genus Astrocaryum, seed dispersal is dependent on medium and large-sized mammals (Zona & Henderson 1989;Zona 2006;Andreazzi et al 2009). Among these animals, agoutis (Dasyprocta spp.)…”

Section: Introductionmentioning

confidence: 99%

Local extinction of an important seed disperser does not modify the spatial distribution of the endemic palm Astrocaryum aculeatissimum (Schott) Burret (Arecaceae)

Zucaratto

Pires

2015

Acta Bot. Bras.

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Spatial pattern of the palm Astrocaryum aculeatissimum was investigated in an urban Atlantic Forest fragment (Tijuca National Park, Brazil) where its main seed disperser, the red-rumped agouti Dasyprocta leporina, is locally extinct. A 120 × 130 m plot (1.56 ha) was established in which all A. aculeatissimum individuals were quantified, georeferenced, and classified by ontogenetic stages, namely, seedling, infant, juvenile, immature individual, and adult. Analyses were performed using Ripley's K function. We recorded 376 individuals, most of which were in the juvenile stage (n = 228). The spatial pattern was aggregated as observed for other palm species. Seedlings and infants were not associated with adults, whereas juveniles and immature individuals were observed closer to adults than expected. The distance between each seedling and the nearest adult ranged from 3 to 30 m (mean ± sd = 11.8 ± 7.8), which is similar to the agouti dispersal distances reported in other studies. Despite the importance of agoutis for the seedling recruitment of A. aculeatissimum, their short-term absence does not affect the spatial distribution of this palm in the studied area.

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“…Las palmas neotropicales producen frutos de semilla grande, abundantes en el bosque y muy atractivos para los frugívoros, especialmente ungulados, roedores y aves (Bodmer 1991;Andreazzi et al 2009). Algunos mamíferos consumen los frutos y defecan las semillas (Fragoso 1994;Silvius 1999;Quiroga y Roldán 2001), otros llevan las semillas a escondites, donde su supervivencia dependerá de no ser depredadas (Smythe 1970;Tuck-Haugaasen et al 2012).…”

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Dispersión de semillas de Mauritia flexuosa (Arecaceae) por frugívoros terrestres en Laguna Azul, Beni, Bolivia

Mendieta-Aguilar

Pacheco

Roldán³

2015

Acta Amaz.

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RESUMENEl acopio esparcido ha recibido singular atención en las últimas décadas, y muchos estudios se han centrado en semillas de palmeras dispersadas por Dasyprocta. Nuestro objetivo fue identificar las especies consumidoras de frutos de Mauritia flexuosa, evaluar la importancia relativa de esas especies y el destino de las semillas dispersadas. Utilizamos experimentos de campo para evaluar el destino de las semillas removidas por frugívoros, en la Reserva de la Biosfera Pilón Lajas, Bolivia. Predijimos que las semillas enterradas por Dasyprocta tendrían menor mortalidad que las no enterradas. Colocamos 6-16 estaciones de frutos, con 15-50 frutos cada una, en cinco periodos de muestreo cubriendo un año. Los principales dispersores de M. flexuosa fueron D. punctata y Cuniculus paca, que transportan las semillas un máximo de 12.63 m y 14.1 m, respectivamente. Los dispersores removieron 7.5% de los frutos de las estaciones. Todas las semillas dispersadas en cuatro de los muestreos fueron depredadas o se pudrieron; solamente el 0.5% de las semillas dispersadas en febrero germinaron. De las semillas colocadas sobre y debajo del suelo en época seca y húmeda, solamente sobrevivieron aquellas enterradas en la época húmeda; el resto fueron depredadas o se pudrieron. Ninguna de las 84 semillas removidas por D. punctata fue enterrada, lo cual difiere de casi todos los reportes sobre el comportamiento de Dasyprocta. Discutimos este resultado en relación al posible efecto de la humedad del suelo y el tamaño de las semillas, y postulamos que la elevada abundancia del recurso haría innecesario acopiar semillas bajo suelo. PALABRAS CLAVE: Scatterhoarding, Dasyprocta, Cuniculus, palmeras, Pilón Lajas Seed dispersal of Mauritia flexuosa (Arecaceae) by terretrial frugivores in Laguna Azul, Beni, Bolivia ABSTRACT Scatterhoarding has received special attention for the last couple of decades, and several studies focused on palms whose seeds are dispersed by Dasyprocta. Our objective was to know the species that consume fruits of Mauritia flexuosa, to evaluate the relative importance of consumer species, and also to assess the fate of dispersed seeds. Using field experiments we evaluated the fate of seeds removed by frugivores at the Pilón Lajas Biosphere Reserve, Bolivia. We predicted that seeds buried by Dasyprocta would present lower mortality that those left unburied. We placed 6-16 fruit stations, with 15-50 fruits each, in five sampling periods along a year. The main seed dispersers of M. flexuosa were D. punctata and Cuniculus paca, which transported seeds a maximum of 12.63 m, and 14.1, respectively. Dispersers removed 7.5% of the fruits from the stations. All seeds removed during four out of the five sampling periods were either predated, or rotted; only 0.5% of the seeds dispersed in February germinated. From the total of seeds we buried in the dry and wet season only survived those buried in the wet season, the remaining were predated or rotted off. None of the 84 seeds removed by D. punctata were buried, which differs fro...

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Mamíferos E Palmeiras Neotropicais: Interações Em Paisagens Fragmentadas

Cited by 36 publications

References 124 publications

Efeito De Borda Em Remanescentes De Floresta Atlântica Na Bacia Do Rio Tapacurá, Pernambuco

Efeito De Borda Em Remanescentes De Floresta Atlântica Na Bacia Do Rio Tapacurá, Pernambuco

Local extinction of an important seed disperser does not modify the spatial distribution of the endemic palm Astrocaryum aculeatissimum (Schott) Burret (Arecaceae)

Dispersión de semillas de Mauritia flexuosa (Arecaceae) por frugívoros terrestres en Laguna Azul, Beni, Bolivia

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