Banca de QUALIFICAÇÃO: MARÍLIA FERNANDES ERICKSON

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MARÍLIA FERNANDES ERICKSON
DATA : 05/03/2018
HORA: 16:00
LOCAL: Sala da PPG em Psicobiologia
TÍTULO:

Comparison of floral coloration between the caatinga and atlantic forest

PALAVRAS-CHAVES:

Sensory ecology, sensory drive, pollination, color vision.

PÁGINAS: 18
GRANDE ÁREA: Ciências Humanas
ÁREA: Psicologia
RESUMO:

Floral coloration is an important signal for the communication of plants and flower visitors. According to the theory of sensory drive, natural selection will select efficient signalers and receptors, which optimizes communication between both. Floral coloration is an important signal to the attraction of possible pollinators. The coloration of an object is dependent on its spectral reflection, the visual system of the observer, the contract between the object and the background and the ambient light. Therefore, the change of any of these factors will affect the efficiency of the signal. Different ambient present distinct light conditions and backgrounds the will influence the color vision of pollinators. The leafs filter the sunlight crating different sensory environments underneath the tree top, where the prevailing ambient light varies according to which wavelengths of light were filtered. During the dry period, when there is less leaf coverage, the lack of leafs to filter the light crates a different ambient light according to seasonality. Moreover, the absence of leafs makes for a different background. These changes can vary between different environments, depending on the composition of their vegetation and the amount of deciduous species. These, and other factors, generate a different sensory environments, in which pollinators may, or not, detect the emitted signals by flowers. There is a hypothesis that there might be a pattern of floral coloration according to temporal variables (seasons) of spatial variables (ambients). This hypothesis was tested in few environments with controversial results. The present study proposes to investigate if there is a pattern of floral coloration in Brazilian biomes with distinct climate and vegetation: the caatinga and atlantic forest. A spectrophotometer will be used to record the color of the flowers, background lighting and ambient lighting. The flowers will be modeled using the visual systems of the main diurnal pollinators (bees, butterflies, hummingbirds, and flies) in order to compare their coloration in different seasons and environments. It is expected that each ambient presents, as more abundant, flowers with colors that optimizes their signaling.

MEMBROS DA BANCA:
Presidente - 1476621 - DANIEL MARQUES DE ALMEIDA PESSOA
Interno - 912.551.554-34 - DINA LILLIA OLIVEIRA DE AZEVEDO - UFRN