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Avifauna of Hornsund area, SW Spitsbergen: present state and recent changes

100%
Wojczulanis-Jakubas K., Jakubas D., Stempniewicz L., Wojczulanis-Jakubas K., Jakubas D., Stempniewicz L.
Polish Polar Research
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2008
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vol. 29
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issue 2
2
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Diversity and trophic structure of bird’s communities in Brazilian Savanna areas of the Cuiabá River basin

100%
Dario F. R., Sandrini M. P.
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2020
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vol. 29
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issue 3
252-268
EN
We analyzed the differences in composition, richness, and abundance of birds in different forest fragments of the Brazilian Savanna in the Cuiabá River basin, Mato Grosso State, Brazil, and we demonstrated the variations in richness and abundance of birds between different trophic guilds. We used point counts to characterize the avifauna. Sampling was conducted in two seasons: summer and winter of 2018 in a total of 36 hours distributed in 108 samples. A total of 743 contacts were obtained belonging to 87 bird species distributed among 17 orders and 33 families and categorized in 16 trophic guilds. The omnivorous and insectivorous birds composed most of the community. For each species, we calculated the abundance index value that showed our study site had a large number of species with low index and few species with intermediate to high index compared to the pattern observed in other surveys. Our study area was characterized by high species diversity for both periods studied. The Shannon-Weaver diversity index for our study areas was 3.90 for the summer period and 3.77 for the winter period. Equitability was high, 0.82 for the summer period and 0.79 for the winter period, suggesting the number of species registered in our study site represented the maximum capacity the areas can shelter. Our results show that despite being a secondary and fragmented forest the study area was characterized by a diverse avian community. The ciliary forest studied that follows the Cuiabá River, although fragmented and isolated by extensive degraded areas and occupied by pastures and agricultural crops, they are important natural environments to maintain bird diversity.
3
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Xingu River’s Big Bend: great diversity of birds in the Brazilian Amazon rainforest

86%
Dario F. R.
The Institute of Biopaleogeography named under Charles R. Darwin
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2021
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vol. 4
1-56
EN
This report is a photographic summary of a study carried out during 2019 in a region called Xingu River’s Big Bend, in the Brazilian Amazon. There were a total of five scientific expeditions to study the environmental impacts of a project in the region and more specifically the possible interferences in the life of the indigenous inhabitants of the region and those who live in harmony with the environment. The photos show the Xingu River, the riparian forest where the study was carried out and some of the bird species registered.
4
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Diversity and trophic structure of bird’s communities from a Restinga forest in Brazil

86%
Dario F. R.
World News of Natural Sciences
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2021
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vol. 38
158-180
EN
The forests along Brazil’s Atlantic coast have undergone extensive transformation from clearing for pastures, eucalyptus forests, agricultural crops, and urban expansion. In this study we described the avian community in a coastal Restinga Forest near the city of Ubatuba, in the São Paulo State, Brazil. The method used to sample the avifauna specimens was the technique of observations per point-counts, and random observations were also carried. The bird’s observations were realized in 84 days during all four seasons out between the years 2005 and 2007 and were registered 142 bird species distributed among 18 orders and 41 families and categorized in 17 trophic guilds. The omnivores and insectivores birds composed most of the community, occupying the edge and different strata of the forest such as canopy and understory. The great abundance of omnivores birds may be directly related to the abundant fruit resources, and also with the great abundance of understory insectivores are indication of the good environmental quality of the studied area.
5
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Spatial distribution and trophic structure of bird’s communities of Atlantic Forest fragments in Brazil

86%
Dario F. R.
World News of Natural Sciences
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2021
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vol. 35
1-24
EN
We analyzed the differences in composition, richness, and abundance of birds in forest fragments of the Atlantic Forest in the São Paulo State, Brazil, and we demonstrated the variations in richness and abundance of birds between different trophic guilds. We used point counts to characterize the avifauna. Sampling was conducted in two seasons: summer and winter of 2020 in a total of 18 hours distributed in 54 samples. A total of 544 contacts were obtained, belonging to 144 bird species distributed among 22 orders and 45 families and categorized in 18 trophic guilds. The omnivores and insectivores birds composed most of the community, occupying the edge and different strata of the forest such as canopy and understory. For each species, we calculated the abundance index value that showed our study site had a large number of species with low index and few species with intermediate to high index compared to the pattern observed in other surveys. Our study area was characterized by high species diversity for both periods studied. The Shannon-Weaver diversity index for our study areas was 4.62. Equitability was high, 0.92, suggesting the number of species registered in our study site represented the maximum capacity the areas can shelter. Our results show that despite being a secondary and fragmented forest the study area was characterized by a diverse avian community. Although the anthropized forest environments are fragmented and isolated by degraded areas and occupied by pastures, agricultural and urban areas, they are important natural environments to maintain bird diversity.
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