Banca de QUALIFICAÇÃO: RANDSON MODESTO COÊLHO DA PAIXÃO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : RANDSON MODESTO COÊLHO DA PAIXÃO
DATE: 31/03/2022
TIME: 13:00
LOCAL: Google Meet
TITLE:

GEOGRAPHIC DISTRIBUTION AND LIFE HISTORY OF ENDEMIC AND THREATENED PASSERIFORMES GLOBALLY IN A HIGHLY FRAGMENTED ENDEMIC CENTER

KEY WORDS:

Land slope; forest area; occupation models; imperfect detection.

PAGES: 62
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Our objective was to estimate the occupation of endemic and threatened passerines in the Atlantic Forest north of the São Francisco River, Brazil, and to analyze the factors that enhance their apparent distribution. The occupation of bird taxa was modeled and used to predict the direction of response of eight covariates based on prior knowledge of bird ecology. A priori, we the covariates measured are expected to represent the key habitat characteristics for the species (ie temperature, precipitation, forest area, elevation) or anthropogenic effects (here, distance from roads and the urban perimeter, for example) to be harmful the birds in focus, based on the hypothesis that anthropogenic factors would have a negative effect on occupation in CEPE, while habitat covariates would have positive effects on the occupation of rare birds. We use data available in the literature, online databases, ornithological collections and from researchers in the region to estimate the parameters using single-season occupation models. The occupation of the grid was best described by two variables: altitude and
forest area. The detectability was affected by the trend of linear effort over time, which indicates that the increase in the sample effort was important for most of the studied taxa. Our study provides robust information on the influence of covariates studied on endemic and threatened passerines and is the first study to provide data on large-scale anthropogenic effects in occupation for most endangered and endemic species in this endemism center. The data indicated that the occupation and detectability of the species was influenced by single variables of greater weight, but that possibly act in conjunction with multiple factors. The generated maps provide information that can be useful in management and action plans for the conservation of the areas where this species occurs, which favors the allocation of resources. Understanding the covariates studied can also potentially reduce the risk of worsening bird losses through policy measures for habitat management in the region.

BANKING MEMBERS:
Externo à Instituição - GUILHERME SANTOS TOLEDO DE LIMA - UFRPE
Externo à Instituição - JOÃO PAULO TAVARES DAMASCENO
Externo à Instituição - MARCELO DA SILVA - IDEMA
Presidente - 1439088 - MAURO PICHORIM