Banca de DEFESA: DORGIVAL DIÓGENES OLIVEIRA JÚNIOR

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DORGIVAL DIÓGENES OLIVEIRA JÚNIOR
DATE: 27/02/2024
TIME: 09:00
LOCAL: Google Meet
TITLE:

EFFECTS OF HABITAT STRUCTURE ON THE OCCUPANCY PATTERNS OF FRUGIVOROUS BIRDS IN FOREST FRAGMENTS OF THE BRAZILIAN ATLANTIC FOREST

KEY WORDS:

Passive acoustic monitoring; Pernambuco Endemism Center, multiple spatial scales, seed dispersers, single-season.

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

Tropical forests are arguably the most biodiverse natural ecosystems in the world. Yet they are constantly being destroyed by human action, impacting various ecosystem services due to the impoverishment of ecological relationships resulting from the biodiversity losses they face. Frugivorous birds play a crucial role in tropical forests, acting as seed dispersers and promoting environmental recovery in disturbed landscapes. Therefore, understanding the factors that influence the occurrence of these birds in fragmented tropical forests is fundamental for the conservation of these ecosystems. Such information is essential to guide control and management measures that favor the permanence of this group of birds in impacted areas, ensuring the continuity of the environmental services they provide. Here, we investigated how habitat structure at multiple spatial scales affects the occupancy patterns of frugivorous birds. We conducted the study in 11 forest fragments located in the north of the Pernambuco Endemism Center, in the Brazilian Atlantic Forest. We recorded species detection data using autonomous recorders at each sampling site for three consecutive days. We estimated the probability of species occupation considering imperfect detection, using three spatial scales (landscape, fragment and micro-habitat). We found that frugivorous bird species responded to different habitat structure characteristics in Atlantic Forest fragments. At the landscape scale, most species were more likely to occupy areas with rougher terrain, greater presence of natural forest formations and less coverage of non-vegetated areas. On the fragment scale, most species showed greater occupation in larger, more circular fragments, closer to the core of the Pernambuco Endemism Center and with more intact forests. On the micro-habitat scale, the species showed greater occupation in places with taller trees and greater complexity in the understory. In addition, greater occupation was observed in areas closer to the edges of fragments, with the exception of one species which showed greater occupation in areas further away from forest edges. Our research emphasizes that in order to ensure greater occupation by frugivorous birds and preserve their ecological functions in the ecosystem, it is recommended to implement protection measures in the remaining forest areas, promote the recovery of degraded areas and carry out projects to conserve the structure of the local vegetation in the forest fragments.

COMMITTEE MEMBERS:
Interno - 1678202 - CARLOS ROBERTO SORENSEN DUTRA DA FONSECA
Externo à Instituição - MARCO AURELIO PIZO FERREIRA - UNESP
Presidente - 1439088 - MAURO PICHORIM