Banca de DEFESA: GISELE MARIA NUNES VIEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : GISELE MARIA NUNES VIEIRA
DATE: 29/03/2023
TIME: 14:30
LOCAL: Videoconferência – Plataforma Google Meet
TITLE:

INFLUENCE OF FRAGMENTATION ON THE BODY CONDITION OF UNDERSTOOD BIRDS COMMUNITIES IN NORTH ATLANTIC FOREST FRAGMENTS

KEY WORDS:

Forest birds. Climatic season. Body score. Body mass. Linear regression.
Tarsus.

PAGES: 98
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUBÁREA: Ecologia Aplicada
SUMMARY:

Body condition is a key indicator of individual health and fitness and is regulated by a
combination of genetic and ecological factors. Birds are particularly interesting models for assessing body condition due to their great morphological and ecological diversity.
However, the lack of standardization makes it difficult to determine the most appropriate
parameters to evaluate this metric. Furthermore, habitat loss and fragmentation have
been the subject of studies in recent decades, as fragmentation can alter processes that
affect specific needs of species, causing a decrease in body condition, mainly due to a
deficiency in the quality or quantity of nutritional resources. Therefore, in this study we
used a scientometric approach to identify the main metrics, parameters and analyzes
used to assess the body condition of birds. In addition to identifying the main ecological
factors that influence these metrics. We evaluated a total of 316 articles. The main
metrics used to assess body condition were "body mass" and "tarsal length", which can
be influenced by a number of factors, such as abundance of food resources, weather
period and environment. The most used analyzes were Linear Regression and Principal
Component Analysis. The use of weight to estimate size is still the most implemented
non-invasive strategy, with the length of a rigid structure usually used as a proxy for size. Then, in order to assess whether the body condition of bird communities in the Atlantic Forest of the Pernambuco Endemism Center tends to be higher in larger fragments and with better forest structure, as well as testing this variation in different precipitation regimes. Birds were studied in four protected areas in the State of Alagoas, Brazil. The body condition index (BCI) was calculated using a simple linear regression between mass and tarsus values. The significance of the difference in ICC values between the different fragments was tested using ANOVA and the variation in relation to the periods of the year using the t test. Landscape quality was assessed from forest structure through canopy cover, litter height and circumference with bark at breast height (CAP). When analyzing the ICC in the different fragments, a direct relationship with the size of the fragments was observed, in which individuals from the larger fragments obtained better mean body condition, however, no difference was observed in the condition between the different rainfall regimes analyzed. When we correlated the ICC values with the intrinsic characteristics of the fragments, significant values were observed for canopy cover and litter height, where fragments with greater canopy coverage and higher litter present a higher density of positive ICC values. On the other hand, the accumulated CAP did not present significant values.

BANKING MEMBERS:
Externo(a) à Instituição - ANDRE DE CAMARGO GUARALDO
Interno(a) - 1278133 - GUILHERME RAMOS DEMETRIO FERREIRA
Presidente - 1756620 - MARCIO AMORIM EFE
Externo(a) à Instituição - MAURO PICHORIM