Aves da Estação Ecológica de Itirapina, estado de São Paulo, Brasil

Motta-Junior, José Carlos; Granzinolli, Marco Antonio Monteiro; Develey, Pedro F.

doi:10.1590/s1676-06032008000300019

Cited by 39 publications

(45 citation statements)

References 15 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Both species were not selective regarding dry or flooded substrates, as also observed by other study (Gimenes and Anjos, 2011). However, these species are strongly biased toward flooded habitats (Motta-Junior, 2008;Carvalho, 2010;Gimenes and Anjos, 2011). It should be pointed out that in many studies on habitat use by egrets, little or no importance was given to analysing the use of the microhabitat (Moreno et al, 2004).…”

Section: Discussionsupporting

confidence: 62%

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Dp¹,

Cc²,

Fb³

et al. 2013

Braz. J. Biol.

View full text Add to dashboard Cite

In the present study, we examined the role of different habitat components and their relationship with microhabitat use by three species of egret: Cocoi heron (Ardea cocoi), Great egret (Ardea alba), and Cattle egret (Bubulcus ibis), in wetlands of southern Brazil. Ardea alba and A. cocoi were not habitat-specific (e.g. vegetation cover and flooding level). Conversely, B. ibis was associated with drier microhabitats. Relative air humidity and air temperature were the main variables which correlated with the occurrence of these species and supported the plasticity of B. ibis and its predominance in drier habitats.Keywords: Aquatic birds, marsh, habitat, Taim. Uso de micro-habitat por três espécies de garça (Pelecaniformes, Ardeidae) no sul do Brasil ResumoNo presente estudo foi avaliado o papel de diferentes componentes do habitat e sua relação quanto ao uso do microambiente por três espécies de Ardeidae: garça-moura (Ardea cocoi), garça-branca-grande (Ardea alba) e garça-vaqueira (Bubulcus ibis), em banhados do extremo sul brasileiro. Aparentemente, A. alba e A. cocoi não apresentaram especificidade a algum tipo de habitat (e.g. cobertura vegetal e nível de alagamento). Por outro lado B. ibis revelou associações a microambientes mais secos. A temperatura do ar e umidade relativa do ar foram as principais variáveis correlacionadas com a ocorrência dessas espécies, além disso, reforçou-se a plasticidade de B. ibis e sua predominância em ambientes secos.

show abstract

Section: Discussionsupporting

confidence: 62%

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Dp¹,

Cc²,

Fb³

et al. 2013

Braz. J. Biol.

View full text Add to dashboard Cite

show abstract

“…For behavioral patterns of digging burrows in an area, beneath the cover provided by trees, shrubs, and herbaceous plants, shrubs and trees would afford vertical protection from raptors, but herbaceous plants would obstruct visual detection of terrestrial mammalian predators and of the shadow of raptors on the ground (Taraborelli et al 2008). EEI has potential predators of C. unicinctus and E. sexcinctus, and these are the following terrestrial carnivores: Leopardus pardalis, Puma concolor, Procyon cancrivorous, Cerdocyon thous, and Chrysocyon brachyurus (Trovati 2009), with Harpyhaliaetus coronatus being the only possible raptor (Trovati 2009;Motta-Junior et al 2008). This strengthens the idea that the preference of armadillos feed on the road in the study area is related to lower predation risk.…”

Section: Discussionmentioning

confidence: 99%

“…The Itirapina Ecological Station belongs to the geomorphological unit of the "Cuesta Basalt Province," which is inserted in a region called the Plateau of São Carlos, wherein the altitude ranges from 705 to 750 m. This is located in São Paulo State, between the municipalities of Itirapina and Brotas at 22°00′ to 22°15′ S and 47°45′ to 48°00′ W (Motta-Junior et al 2008;Trovati and Munerato 2013).…”

Section: Study Sitementioning

confidence: 99%

Differentiation and characterization of burrows of two species of armadillos in the Brazilian Cerrado

Trovati

2015

Rev. Chil. de Hist. Nat.

View full text Add to dashboard Cite

Background: Signs left by some mammals such as tracks, trails, burrows, scratches, feces, hair, and others can be an important tool for species identification. This study was conducted in the Itirapina Ecological Station, in the southern Brazilian Cerrado, whose main objectives were to (1) compare the burrow morphometric variables of Cabassous unicinctus and Euphractus sexcinctus and (2) check for differences in the occurrence of foraging burrows in two different environments: areas with vegetation (shrubby grassland) and areas without vegetation (roads). The collected measures of armadillo's burrows have been width, height, depth, and angle relative to the soil. To record foraging burrows (<70 cm), the linear transect methodology was used simultaneously in roads and shrubby grassland environments. Results: In a shrubby grassland environment of the Itirapina Ecological Station, a density of 121 burrows/ha pertaining to C. unicinctus and of 277 to E. sexcinctus was observed. Although there is overlap between them, morphometric variables were used to measure the burrows; significant differences were observed in all: depth, p < 0.001; ratio, p < 0.001; perimeter of the ellipse (perimeter), p < 0.001; and angle of excavation relative to the soil, p < 0.001. There was an observed interaction between the variables p < 0.001 for Wilk test. The PCA analysis evidenced two highly distinct groups of burrows, which corresponded to the initial visual classification. The variance explained by axes 1 and 2 was 83.18 %. The variable that most influenced the distinction of the burrows of the species was the perimeter. There was a density of 114 foraging burrows/ha across the roads and 42 in shrubby grassland. The results of the ANOVA, p < 0.05, and Tukey test, p < 0.05, demonstrate significant difference between the mean densities of foraging burrows in the said environments. This indicates that armadillos use the area devoid of vegetation to feed. Conclusions: Thus, this study provides information that can assist in the surveys of these species as well as to clarify aspects of its ecology in the Cerrado.

show abstract

“…Therefore, this was an analysis of the potential survival of seeds in the tails of a relatively broad mean-size distribution of seeds produced by individuals of Syagrus loefgrenii, which is year round important in the diet of Cerrado rodents (Bueno et al, 2004;Ragusa-Netto, 2016). (Motta-Junior et al, 2008). The deciduous Cerrado vegetation consists mainly of a continuous ground layer dominated by grasses, and a woody layer varying in ground cover from 10 to 20% of trees of 2-6 m high.…”

Section: Introductionmentioning

confidence: 99%

The effect of size and density on nut removal in Syagrus loefgrenii Glassman (Arecaceae) in the Brazilian Cerrado

Ragusa-Netto

2017

Braz. J. Biol.

View full text Add to dashboard Cite

In this study I tested the effect of Syagrus loefgrenii nut size and number on the intensity of removal by rodents across seasons. Trials were performed in which piles of either small or large endocarps (1, 3, 6, 12, and 25) were subjected to removal by rodents in the Cerrado (Brazilian savanna). Despite of variations in the intensity of removal, always this process decrease conform endocarp number. Also, mean proportion of endocarp removal was unrelated to year period, initial number, and size of endocarps. Hence, endocarp removal was consistently negative density-dependent. As, in principle, the observed patterns of nut removal point out similar survival chances for both nut sizes, the pervasive negative density-dependent response emerges as a strategy in S. loefgrenii to swamp rodents all year round irrespective of seed size.Keywords: seed predation, density-dependence, plant-animal interaction, palm fruits, Brazil, Cerrado palm. Efeito do tamanho e densidade sobre a remoção de sementes em Syagrus loefgrenii Glassman (Arecaceae) no Cerrado brasileiro ResumoAvaliei o efeito do tamanho e densidade de endocarpos de Syagrus loefgrenii sobre a intensidade de remoção por roedores conforme a estação do ano. Para tanto, desenvolvi experimentos no Cerrado em que pilhas de endocarpos pequenos ou grandes (1, 3, 6, 12 e 25), foram sujeitos à remoção por roedores. Apesar da intensidade de remoção variar ao longo do ano, sempre esse processo teve relação inversa com o número de endocarpos. Além disso, em qualquer estação do ano, as proporções médias de endocarpos removidos sempre foram menores nas pilhas maiores, independentemente do tamanho dos endocarpos. Portanto, o processo de remoção de endocarpos foi negativamente dependente da densidade. Como, em princípio, os padrões de remoção em S. loefgrenii sugerem chances similares de sobrevivência tanto para endocarpos grandes, quanto pequenos, a preponderância de resposta negativamente dependente da densidade emerge como uma estratégia de S. loefgrenii voltada a saciar roedores em qualquer período do ano independentemente do tamanho de suas sementes.Palavras-chave: predação de sementes, densidade-dependente, interação planta-animal, frutos de palmeira, Brasil, palmeira do Cerrado.

show abstract

Aves da Estação Ecológica de Itirapina, estado de São Paulo, Brasil

Cited by 39 publications

References 15 publications

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Microhabitat use by three species of egret (Pelecaniformes, Ardeidae) in southern Brazil

Differentiation and characterization of burrows of two species of armadillos in the Brazilian Cerrado

The effect of size and density on nut removal in Syagrus loefgrenii Glassman (Arecaceae) in the Brazilian Cerrado

Contact Info

Product

Resources

About