Banca de QUALIFICAÇÃO: DORGIVAL DIÓGENES OLIVEIRA JÚNIOR

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DORGIVAL DIÓGENES OLIVEIRA JÚNIOR
DATE: 30/08/2023
TIME: 09:30
LOCAL: Google Meet - https://meet.google.com/ymu-zdez-xmd
TITLE:

OCCUPANCY PATTERNS AND VOCAL ACTIVITY OF FRUGIVOROUS BIRDS IN ATLANTIC FOREST FRAGMENTS

KEY WORDS:

Center of Endemism Pernambuco; Occupancy; Vocal activity; Frigivorous birds; Passive acoustic monitoring; Atlantic Forest.

PAGES: 61
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Tropical regions are arguably the most important forests for biodiversity, yet they are constantly destroyed by human action, altering key ecosystem services. Frugivorous birds play a crucial role as seed dispersers in forest habitats, and understanding the factors that influence their distribution and vocal behavior in disturbed environments is critical for defining conservation and monitoring strategies. In chapter 1, we investigate how habitat structure at multiple spatial scales affect the occupancy patterns of frugivorous birds in forest fragments. We conducted passive acoustic monitoring of frugivorous birds in 11 forest fragments located in the northern Pernambuco Endemism Center in the Brazilian Atlantic Forest. We estimated the probability of species occupancy considering imperfect detection, using three spatial scales: landscape, site and microhabitat. We highlight that frugivorous bird species responded to different characteristics of habitat structure in forest fragments. At the landscape scale, most species showed a higher probability of occupancy in more intact areas, with more natural forest formations and fewer areas of anthropogenic matrices. At the local scale, most species showed higher occupancy in areas closer to the core of the Pernambuco Endemism Center and in places closer to fragment edges, while only two species showed higher occupancy in areas farther from forest edges. At the microhabitat scale, several species exhibited higher occupancy in more conserved sites (i.e., with larger trees, wider trunks, more closed canopy and greater understory complexity). Therefore, to ensure the occurrence of frugivorous birds and their essential ecological functions in the ecosystem, we recommend the implementation of protection measures of the remaining forest areas, the recovery of degraded areas and the realization of projects to preserve the local vegetation structure in forest fragments. In chapter 2, still developing analyses, we use passive acoustic monitoring to investigate the influence of microclimate on vocal activity patterns of frugivorous birds in a highly fragmented tropical forest. Our expectations are to understand the behavioral ecology of frugivorous birds in tropical environments and to propose recommendations for monitoring these species.

COMMITTEE MEMBERS:
Externa à Instituição - LIANA MARA MENDES DE SENA
Externa à Instituição - MARINA ANTONGIOVANNI DA FONSECA
Presidente - 1439088 - MAURO PICHORIM