Banca de DEFESA: JOÃO LUCAS GOMES DE SOUZA SILVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : JOÃO LUCAS GOMES DE SOUZA SILVEIRA
DATA : 08/03/2018
HORA: 15:00
LOCAL: Anfiteatro das aves - CB
TÍTULO:

Environmental inffluence over the cooccurrence patterns of two congeneric bird species in a forest fragment within NE Brazil

PALAVRAS-CHAVES:

Coexistence, co-occurrence, static occupancy, conditional occupancy, Mata Estrela, MARK, Conopophagidae

PÁGINAS: 50
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

One of the main explanations for the high tropical species diversity is the possibility of coexistence between species with similar niche. Coexistence studies investigate how species are organized in time and space, also focusing on the interactions between them and with the environment. Although the interspecific competition seems to explain alone the cooccurrence patterns, environmental characteristics may have the same power of explanation. Therefore, identify which factors influence species coexistence is essential for elucidating the community regulation mechanisms. Creating theoretical models that incorporate species detection and occupancy estimates allows one to simultaneously evaluate multiple hypothesis about the species occurrence patterns. Occupancy estimates have been increasingly used as a tool in modelling species dynamics, also guiding monitoring strategies and management actions. This study focused on two Passeriformes species Conopophaga cearae (Chupa-dente-do-nordeste) e Conopophada melanops (Cuspidor-de-mascara-preta) for a better understanding the patterns of space usage by the ornithofauna at the North-eastern Brazilian Atlantic Forest. Our assessments were conducted at the RPPN Mata Estrela, south coast of RN state, via hearing spots (?), visited over two distinct seasons: a dry one (September, October and November 2016) and a wet one (May, June and July 2017). To clarify the field-collected data, we created and tested static and conditional occupancy models in the program MARK. With the static occupancy models, we observed that the environmental preferences are different between species and the niche plasticity of C. cearae seems to contribute significantly for the species cooccurence. In addition to that, the conditional occupancy modelling pointed that environmental characteristics (both seasonality and habitat structural conditions) are more relevant for the choice of areas by these species than the interaction between them.

MEMBROS DA BANCA:
Interno - 1718346 - EDUARDO MARTINS VENTICINQUE
Externo à Instituição - LEONARDO FERNANDES FRANÇA - UFERSA
Presidente - 1439088 - MAURO PICHORIM