Banca de QUALIFICAÇÃO: PAULO FERNANDES DA COSTA NETO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : PAULO FERNANDES DA COSTA NETO
DATA : 01/11/2017
HORA: 09:00
LOCAL: SALA DE REUNIÃO DO DECOL
TÍTULO:

Patterns of habitat use and co-occurrence of the Herpsilochmus genus in a forest remnant in the northern of Atlantic Forest distribution


PALAVRAS-CHAVES:

sympatric species, detection probabilities, coexistence, vegetation structure, interspecific interactions


PÁGINAS: 30
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

The bird distribution in the environment is modulated by habitat complexity and seasonal changes in resource availability, characteristics whose understanding is essential for accurate inferences about how species use the habitat. In addition, interspecific interactions also affect the distribution and the way in which the species use the habitat and may be an important factor to understand the coexistence, especially between cogeneric species. Here, we used occupancy models, taking into account imperfect detection, to investigate how vegetation structure and interspecific interactions affect patterns of habitat use and co-occurrence in three sympatric species of the genus Herpsilochmus (H. atricapillus, H. pectoralis and H. rufimarginatus) in a forest remnant at the northern portion of the Atlantic Forest distribution (RPPN Mata Estrela). For this, we performed point-count surveys in 80 sample units, in the dry and rainy season, and collected variables related to the vegetation structure. From this we created sets of occupancy models and selected the best ranked for each species. As preliminary results we verified that the species H. atricapillus and H. pectoralis had high occupancy rates (> 0.89 ± 0.07), whereas H. rufimarginatus had moderate and different occupancy rates among phytophysiognomies (0.47 ± 0.34 - 0.68 ± 0.15). The density of trees was the most important variable in the occupancy of the species, but with positive effect on H. pectoralis and negative effect on H. rufimarginatus. Although the best model for H. atricapillus also includes tree density, the effect of the variable seems uncertain. The detection probabilities ranged from low (0.19 ± 0.03) to moderate (0.59 ± 0.05) between species. Our results indicate that the tree density is the most important factor in the habitat use by the species studied here. However, H. pectoralis and H. rufimarginatus presented different preferences of micro-habitat, which may be modulating the coexistence among these species.

 


MEMBROS DA BANCA:
Interno - 1451741 - MARCIO ZIKAN CARDOSO
Externo ao Programa - 704.729.711-15 - MARÍLIA BRUZZI LION - UFRN
Presidente - 1439088 - MAURO PICHORIM
Notícia cadastrada em: 25/10/2017 14:34
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