Banca de DEFESA: ALINA ROCHA PIRES BARBOZA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : ALINA ROCHA PIRES BARBOZA
DATA : 01/02/2019
HORA: 08:30
LOCAL: Laboratório Didático I
TÍTULO:

BENTHIC MOLLUSCS AND ECHINODERMS IN TROPICAL SANDSTONE REEFS: METHODS EVALUATION AND COMMUNITY STRUCTURING

PALAVRAS-CHAVES:

benthos; molluscs; echinoderms; sandstone reefs; intertidal; survey methods; scientometrics

PÁGINAS: 103
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

Intertidal rocky environments are important feeding, growth and reproduction areas to a variety of benthic organisms, including molluscs and echinoderms. They can be found worldwide and their benthos’ composition and temporal and spatial patterns are influenced by environmental and biological factors. Nevertheless, most studies on these environments have focused on rocky shores of temperate and subtropical regions. On the other hand, there is a lack of studies in other rocky formations and tropical regions, specially testing proper methodologies to their unique characteristics. This study had three main objectives: 1) to identify the main types of method used for quantifying benthonic organisms, through scientometric analysis; and, in tropical sedimentary reefs: 2) to test random and stratified quadrats and transects with quadrats to test the survey method that best represent richness of molluscs and echinoderms in these environments; 3) and, after defining the most suitable survey method, to test which environmental factors influence occurrence, abundance and richness of these organisms, and testing whether these is seasonal variation of occurrence of species. The organisms’ mobility is one of the determinant factors when choosing benthonic survey method. Quadrats and transects with quadrats were the main methods used to delimit areas of countage of mobile individuals and estimation of sessile cover. Random transects with quadrats showed better richness results with less collection effort, including sampling under boulders when they were present. Substrate cover, reef typology, habitat complexity and exposure time were the main environmental factors determining the structure of communities over the reefs. Substrate cover, habitat complexity and exposure time were the main structurers of communities under boulders. The abundance of organisms of the studied communities varied between dry and rainy stations, although this only occurred within a few taxa. 

MEMBROS DA BANCA:
Externo à Instituição - CARLOS EDUARDO ROCHA DUARTE ALENCAR - UERN
Externo à Instituição - CRISTIANE XEREZ BARROSO - UFC
Externo ao Programa - 363.178.178-47 - EDSON APARECIDO VIEIRA FILHO - UFRN
Presidente - 2412921 - JULIANA DEO DIAS
Externa ao Programa - 347010 - ROSANGELA GONDIM D OLIVEIRA