Banca de DEFESA: LOREANE DIAS ALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LOREANE DIAS ALVES
DATA : 15/12/2020
HORA: 14:00
LOCAL: Instituto de Biologia (Ambiente Virtual)
TÍTULO:

TROPHYC DYNAMICS OF THE PLANCTONIC COMMUNITY UNDER THE EFFECT OF COASTAL UPWELLING ON THE CONTINENTAL SHELF OF SALVADOR

PALAVRAS-CHAVES:

Upwelling, Plankton, Complex Networks, Foodweb

PÁGINAS: 89
GRANDE ÁREA: Ciências Biológicas
ÁREA: Ecologia
RESUMO:

Coastal upwelling events are recorded at Todos os Santos Bay entrance (TSB). However, there are still no studies that investigate the effect of these events on local biota. To fill this gap and assess whether these oceanographic events has an effect on the trophic dynamics of plankton, fourteen monthly campaigns were carried out over the years 2018 and 2019 (April / 2018 to May / 2019) and then 14 complex foodwebs were set up. Organisms in the planktonic community were identified and grouped according to their size and dietary habits. Subsequently, analyzes of the properties of food networks were performed and to determine the influence of resurgence on the planktonic community and on the dynamics and structure of the trophic network, a Pearson Correlation (r) (with Bonferroni correction) was performed to find out if the physical variables that describe the occurrence of resurgence (temperature and salinity) have some influence on the biota and later a Generalized Additive Model was applied. Foodwebs comprise 147 to 371 species and 6,840 to 46,362 interactions. The food link were established through data presented in the literature. We identified 916 morphotypes distributed in 21 phyla (4 from the phytoplanktonic community and 17 from the zooplanktonic community), 31 classes, 17 orders, 124 families and 130 genera (zooplankton and dinoflagellates). We found that plankton foodwebs are characterized by high diversity and a large number of omnivorous and cannibal species. In addition, the results indicate that the temporal variation of the environmental variables that describe coastal upwelling directly influenced some properties of planktonic food networks (salinity directly on nodes, edges, degrees, percentage of omnivores and intermediates-mixotrophic, and temperature directly on the percentage of carnivores and omnivores in the transition period), in the patterns of organization and composition of the local network. The results presented in this study present an important step towards a better understanding of the community structure of this upwelling ecosystem.

MEMBROS DA BANCA:
Interno - 3062840 - BRUNO VILELA DE MORAES E SILVA
Presidente - 1475171 - DORIEDSON FERREIRA GOMES
Externo ao Programa - 1350143 - JOSE GARCIA VIVAS MIRANDA