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2020 | 29 | 3 | 252-268
Article title

Diversity and trophic structure of bird’s communities in Brazilian Savanna areas of the Cuiabá River basin

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Abstracts
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.
Keywords
EN
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Year
Volume
29
Issue
3
Pages
252-268
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Contributors
  • Instituto de Pesquisas e Estudos da Vida Silvestre, Rua Leonardo Mota, 66 - São Paulo-SP, Brazil - ZIP 05586-090
  • Instituto de Pesquisas e Estudos da Vida Silvestre, Rua Leonardo Mota, 66 - São Paulo-SP, Brazil - ZIP 05586-090
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