Banca de QUALIFICAÇÃO: FELIPE DE OLIVEIRA FERNANDES

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : FELIPE DE OLIVEIRA FERNANDES
DATE: 27/07/2020
TIME: 09:00
LOCAL: WEBCONFERÊNCIA - https://meet.google.com/osz-sjwr-svv
TITLE:

Seaweed structural complexity and chemical composition as shaping factors of associated fauna

KEY WORDS:

Morphology;Habitat choice;Food choice;Chemical cues;Fractal measures;Amphipoda

PAGES: 50
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Seaweeds offer many services for associated fauna (shelter from predation and/or stressful abiotic conditions, substrate, food and sediment retention). In this context, this work was divided into three chapters in order to investigate how the structural complexity of different seaweeds may affect ecological aspects of associated fauna (richness, density, diversity and composition) and which role seaweed complexity and chemical composition plays on habitat and food choice by their fauna. In the first chapter, the influence of seaweed structural complexity was analyzed based on ecological aspects of the fauna associated with six species of seaweed. The ecological aspects were evaluated considering the fractal area (spaces between branches) and the fractal perimeter (contour level) of seaweeds. Halimeda opuntia had the highest values of richness and diversity. Dictyopteris delicatula showed the highest density. Regarding faunal composition, H. opuntia and Gelidium coarctatum had the most distinct communities. In the second chapter, experiments were carried out to assess the choices (food, habitat and chemical cues) by amphipods concerning different species of seaweed. Gracilaria cervicornis was the most consumed seaweed among the species offered. In addition, in the experiments of chemical cues (mimics with and without algal extracts), the amphipods were attracted only by those with extracts of G. cervicornis. These results indicate that amphipods are probably attracted by chemical cues from G. cervicornis as they serve primarily as a food. In the third chapter, experiments will be carried out to determine whether the habitat choice by amphipods is affected by predators based on chemical cues in the environment.

BANKING MEMBERS:
Presidente - 1279472 - ELIANE MARINHO SORIANO
Interna - 2412921 - JULIANA DEO DIAS
Externo ao Programa - 363.178.178-47 - EDSON APARECIDO VIEIRA FILHO - UFRN