Species poor but distinct: bird assemblages in white sand vegetation in Jaú National Park, Brazilian Amazon

Borges, Sérgio Henrique

doi:10.1111/j.1474-919x.2004.00230.x

Cited by 54 publications

(55 citation statements)

References 27 publications

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“…There is currently no easily identifiable barrier between P. napensis and species to the east, although the lower Rio Japurá separates P. napensis and P. ochroptera in the south near the Solimões River. Moreover, the mid-Rio Negro basin is occupied by extensive areas of open vegetation growing over white-sand soil, which may have formed over ancient palaeochannels and today may function as a barrier for forest species [46].…”

Section: Discussion (A) Testing the Refuge Hypothesismentioning

confidence: 99%

A palaeobiogeographic model for biotic diversification within Amazonia over the past three million years

et al. 2011

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Many hypotheses have been proposed to explain high species diversity in Amazonia, but few generalizations have emerged. In part, this has arisen from the scarcity of rigorous tests for mechanisms promoting speciation, and from major uncertainties about palaeogeographic events and their spatial and temporal associations with diversification. Here, we investigate the environmental history of Amazonia using a phylogenetic and biogeographic analysis of trumpeters (Aves: Psophia), which are represented by species in each of the vertebrate areas of endemism. Their relationships reveal an unforeseen 'complete' time-slice of Amazonian diversification over the past 3.0 Myr. We employ this temporally calibrated phylogeny to test competing palaeogeographic hypotheses. Our results are consistent with the establishment of the current Amazonian drainage system at approximately 3.0 -2.0 Ma and predict the temporal pattern of major river formation over Plio-Pleistocene times. We propose a palaeobiogeographic model for the last 3.0 Myr of Amazonian history that has implications for understanding patterns of endemism, the temporal history of Amazonian diversification and mechanisms promoting speciation. The history of Psophia, in combination with new geological evidence, provides the strongest direct evidence supporting a role for river dynamics in Amazonian diversification, and the absence of such a role for glacial climate cycles and refugia.

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Section: Discussion (A) Testing the Refuge Hypothesismentioning

confidence: 99%

A palaeobiogeographic model for biotic diversification within Amazonia over the past three million years

et al. 2011

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“…Therefore, organisms should not distribute themselves randomly and some vegetation formations should have higher richness and abundance than others. More complex Amazonian forest had more birds than less structured forest from the same biome (Borges, 2004). Structurally more complex vegetation types decrease the effects of seasonality, resulting in higher stability in resource availability hosting more year-long residents (Hurlbert and Haskell, 2003;Manhães and Dias, 2011).…”

Section: Introductionmentioning

confidence: 99%

Birds' nesting parameters in four forest types in the Pantanal wetland

Pinho

Marini

2014

Braz. J. Biol.

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We tested the heterogeneity/productivity hypothesis with respect to the abundance and richness of birds and the vegetation density hypothesis with respect to birds' nest predation rates, and determined the relative importance of forested vegetation formations for the conservation of birds in the Pantanal. We estimated the apparent nesting success, and the abundance and richness of nesting birds' in four forest types, by monitoring nests during two reproductive seasons in four forested physiognomies (two high productivity/heterogeneity evergreen forests = Cambará and Landi; two low productivity/heterogeneity dry forests = Cordilheira and Carvoeiro) in the Pantanal wetland in Poconé, State of Mato Grosso, Brazil. We found 381 nests of 46 species (35 Passeriformes and 11 non-Passeriformes) in the four forest types. Of these, we monitored 220 active nests belonging to 44 species, 101 during the reproductive season of 2001 and 119 in 2002. We supported the productivity/heterogeneity hypothesis since the two evergreen forests had higher nest abundance and one of them (Cambará) had higher nesting species richness than the dry forests. The number of nests found in each habitat differed with most nests monitored in the Cambará forest (82%), followed by Landi (9%), Cordilheira (6%) and Carvoeiro (3%) forests. The total number of nests monitored was significantly higher in evergreen forests than in dry forests. Also, more species nested in evergreen (37 species) than in dry (16 species) forests. A Correspondence Analysis revealed that only Carvoeiros had a different nesting bird community. The overall apparent nesting success of 220 nests was 26.8%. We did not support the vegetation density hypothesis since nest predation rates were similar between evergreen (73.5%) and dry (70%) forests, and were higher in the Landi (85%) than in the other three forests (69.2 to 72.2%). Our data indicate that Cambará forests seem to be a key nesting habitat for many bird species of the Pantanal. If this local pattern also occurs in other regions of the Pantanal, the use and management of Cambará forests might prove to be important for the conservation of forest birds of this biome. However, conflicting results with other taxonomic groups show that conservation measures for these forests and land use policies should be based on a more complete biodiversity evaluation of the region.Keywords: nesting success, productivity/heterogeneity hypothesis, vegetation density hypothesis, Pantanal. Parâmetros reprodutivos de aves em quatro tipos de florestas no Pantanal ResumoTestamos a hipótese de heterogeneidade / produtividade com relação à abundância e riqueza de aves e hipótese da densidade de vegetação com relação às taxas de predação de ninhos de pássaros, e determinamos a importância relativa de formações vegetais florestais para a conservação das aves no Pantanal. Estimamos o sucesso de nidificação aparente, a abundância e riqueza de nidificação de aves em quatro tipos de floresta, por monitoramento de ninhos durante duas estações repr...

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“…This species has also been recorded in some other habitats in the Amazon forest. BORGES (2004), working in the Jau National Park, located about 150 km from our study area, recorded H. poecilinotus occurring in campinarana -small islands of open forests occurring in exposed sandy soils, with endemic plant species and lower diversity compared with those in predominant Terra firme forest (PRANCE 1996) -, Terra firme forest and Igapo forest.…”

Section: 6mentioning

confidence: 99%

“…In addition, most studies have been undertaken at micro or meso spatial scales (PEARSON 1977, BIERREGAARD 1990, ROBINSON & TERBORGH 1995, BORGES & GUILHERME 2000, BORGES 2004, GUILHERME & CINTRA 2001.…”

Section: Resumo Efmentioning

confidence: 99%

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.

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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.

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Species poor but distinct: bird assemblages in white sand vegetation in Jaú National Park, Brazilian Amazon

Cited by 54 publications

References 27 publications

A palaeobiogeographic model for biotic diversification within Amazonia over the past three million years

A palaeobiogeographic model for biotic diversification within Amazonia over the past three million years

Birds' nesting parameters in four forest types in the Pantanal wetland

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

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