scholarly journals Potential bird dispersers of Psychotria in a area of Atlantic forest on Ilha Grande, RJ, Southeastern Brazil: a biochemical analysis of the fruits

2006 ◽  
Vol 66 (1a) ◽  
pp. 01-08 ◽  
Author(s):  
E. M. Almeida ◽  
P. F. Costa ◽  
M. S. Buckeridge ◽  
M. A. S. Alves
Keyword(s):  
Foraging Behavior ◽  
Tropical Forests ◽  
Atlantic Forest ◽  
Biochemical Analysis ◽  
Sugar Content ◽  
Sympatric Species ◽  
Fruit Production ◽  
Forest Area ◽  
Southeastern Brazil ◽  
Carbohydrate Composition

The present study assessed the fruiting pattern, bird foraging behavior, and sugar content of ripe fruits of two sympatric species of Rubiaceae (Psychotria brasiliensis and P. nuda). This study was carried out in an Atlantic forest area on Ilha Grande, RJ, between August 1998 and July 1999. Fruit production occurred year round, with a peak of mature P. brasiliensis fruits in December 1998 and another of P. nuda in February of 1999. Lipaugus lanioides (Cotingidae), Baryphtengus ruficapillus (Momotidae) and Saltator similis (Emberizidae) made the most frequent foraging visits to fruiting P. brasiliensis, so that L. lanioides and B. ruficapillus removed the fruits with sallying maneuvers while S. similis gleaned the fruits. Lipaugus lanioides was by far the most important consumer, and potentially the main disperser of P. brasiliensis. Birds of this genus are heavy frugivores in the tropical forests and are widely assumed to be important seed dispersers. The fruits were analyzed quantitatively and qualitatively in relation to the amounts of sucrose and starch. Psychotria brasiliensis (the visited species) showed the smallest quantity of sucrose and the highest amount of starch. These findings suggest that what may influence the birds' choice of fruit is the proportion of starch in the Psychotria species studied here rather than the carbohydrate composition.

scholarly journals Attraction to conspecifcs in Rhinella icterica and R. ornata tadpoles (Anura: Bufonidae)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Alexandre Polettini Neto ◽  
Jaime Bertoluci
Keyword(s):  
Social Behavior ◽  
Atlantic Forest ◽  
Laboratory Experiments ◽  
Random Distribution ◽  
Social Process ◽  
Sympatric Species ◽  
The Other ◽  
Southeastern Brazil ◽  
Ecological Processes ◽  
Innate Behavior

Abstract: Tadpoles are able to perceive and discriminate signals from environment and they may use this ability in behaviors and ecological processes. Recognition mechanisms may be involved in schooling by means of attraction among individuals, characterizing a social process. By means of laboratory experiments the present study investigated the presence or absence of attraction to conspecifics in tadpoles of Rhinella icterica and R. ornata, two sympatric species from the Atlantic Forest of southeastern Brazil. We collected eggs of these two species in the field and reared them in laboratory according to two different methods (isolated or in groups of siblings). Tadpoles were submitted to experiments of choice between conspecifics, heterospecifics, and an empty compartment. Rhinella icterica tadpoles preferred to associate with conspecifics rather than R. ornata tadpoles, and we verified this is an innate behavior. Rhinella ornata tadpoles failed to discriminate between conspecifics and R. icterica tadpoles. When submitted to choice between a group of tadpoles of the other species and an empty compartment, R. icterica tadpoles presented random distribution, while R. ornata tadpoles preferred to associate with heterospecifics. Our results indicate R. icterica tadpoles have preference to associate with conspecifics, while R. ornata tadpoles may school indiscriminately. This study contributes for a better understanding of larval anuran social behavior.

Ant Fauna on Cecropia pachystachya Trécul (Urticaceae) Trees in an Atlantic Forest Area, Southeastern Brazil

Sociobiology ◽  
2013 ◽  
Vol 60 (3) ◽  
Author(s):  
Paula CJ Reis ◽  
Wesley D DaRocha ◽  
Luiz AD Falcão ◽  
Tadeu J Guerra ◽  
Frederico S Neves
Keyword(s):  
Atlantic Forest ◽  
Forest Area ◽  
Southeastern Brazil

Diet of Tonatia bidens (Chiroptera, Phyllostomidae) in an Atlantic Forest area, southeastern Brazil: first evidence for frugivory

Mammalia ◽  
2013 ◽  
Vol 77 (4) ◽  
Author(s):  
Saulo Felix ◽  
Roberto Leonan Morim Novaes ◽  
Renan de França Souza ◽  
Ricardo Tadeu Santori
Keyword(s):  
Atlantic Forest ◽  
Forest Area ◽  
Southeastern Brazil

scholarly journals Estimation of the species richness of hyperdiverse beetles (Coleoptera: Cerambycidae) in an area of Atlantic Forest, Minas Gerais, southeastern Brazil

2019 ◽  
Vol 14 (4) ◽  
pp. 489-498
Author(s):  
Felipe Donateli Gatti ◽  
Marco Antonio Alves Carneiro
Keyword(s):  
Species Richness ◽  
Tropical Forests ◽  
Atlantic Forest ◽  
Southeastern Brazil ◽  
Biodiversity Hotspots ◽  
Species Accumulation Curves ◽  
The Family ◽  
Accumulation Curves ◽  
One Year ◽  
Collection Methods

Species are elementary units in community ecology studies. However, sample limitations obstruct the elaboration of accurate faunistic inventories, especially in biodiversity hotspots, such as tropical forests. In this way, the objective of this research was to describe the richness, using different non-parametric estimators of richness, in the family Cerambycidade, a group of hyperdiverse insects in the Atlantic Forest. Five hundred and eighty-one specimens belonging to 145 species and 3 subfamilies were collected. Among the species sampled, 46.2% were considered singletons, 13.8% doubletons, 48.95% unicates, 15.15% duplicates and 90.3% ecologically rare. The species accumulation curves did not stabilize, which was already expected considering that more species and individuals were sampled in the last months of collection. The estimated richness presented values much higher than the observed richness. This was a reflect of the high proportion of ecologically rare species present in the sample. This work showed that faunistic inventories of hyperdiverse groups, with only one year of collection and a single sampling methodology may underestimate the species richness of a region. Thus, larger time series associated with different collection methods are essential for a more accurate survey of biodiversity in the Atlantic Forest.

Two new species of Anthurium Schott (Araceae) from the Atlantic Forest in Minas Gerais, Brazil

Phytotaxa ◽  
2020 ◽  
Vol 440 (4) ◽  
pp. 292-300
Author(s):  
JANAINE K. HAMMES ◽  
MARCUS A. N. COELHO ◽  
LÍVIA G. TEMPONI ◽  
JULIO ANTONIO LOMBARDI
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Leaf Blade ◽  
Sympatric Species ◽  
Fruit Color ◽  
Southeastern Brazil ◽  
Similar Species ◽  
Forest Region ◽  
Two New Species ◽  
Blade Shape

Two new species of the genus Anthurium are described from the Serra do Brigadeiro State Park, in the Atlantic Forest region, southeastern Brazil. Anthurium atrovinosum was found from 1450 to 1720 m and A. brigadeiroense from 1260 to 1650 m. Although they are sympatric species, A. atrovinosum reaches higher elevations, while A. brigadeiroense can be found up to 1650 m. Both belong to Anthurium sect. Urospadix subsect. Insculptinervia, but are easily differentiated by the leaf blade shape, fruit color. Descriptions, illustrations, photographs, comments on geographical distribution, ecology, phenology and comparisons with other similar species are presented.

scholarly journals Effects of Small Dams on the Benthic Community of Streams in an Atlantic Forest Area of Southeastern Brazil

2009 ◽  
Vol 94 (2) ◽  
pp. 179-193 ◽  
Author(s):  
Erick Frota Almeida ◽  
Renata Bley Oliveira ◽  
Riccardo Mugnai ◽  
Jorge Luiz Nessimian ◽  
Darcílio Fernandes Baptista
Keyword(s):  
Atlantic Forest ◽  
Benthic Community ◽  
Forest Area ◽  
Southeastern Brazil ◽  
Small Dams
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