Banca de QUALIFICAÇÃO: ANDRESSA TAVARES SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : ANDRESSA TAVARES SILVA
DATA : 29/11/2018
HORA: 15:00
LOCAL: IFBA - Campus Porto Seguro
TÍTULO:

Study of the sensitivity and tolerance to the increase of nutrient concentration in coral larvae

PALAVRAS-CHAVES:

Agaricia humilis, reef ecosystems, reactive oxygen species, antioxidant defenses, LPO, TBARS

PÁGINAS: 60
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

Anthropogenic activities that lead to the use of water resources strongly affect aquatic ecosystems, causing alterations in their form, original composition, and compromising the existing communities. In addition, environmental stressors are important indicators of the health of numerous organisms, such as reefs, since these respond physiologically to these stressors. Thus, the objective of this work was to study the effects of the increase of dissolved inorganic nutrients and temperature on the tolerance of Agaricia humilis larvae. The study was conducted in the microcosm of the Living Coral Project, simulating conditions of nutrient concentration (8.5 and 46) μmol L^-1 for ammonium; (1 and 8) μmol L^-1 for nitrate and the mixtures using the same values, in solutions prepared with synthetic saline water, and temperature (high 32 ° C and low 26 ° C) with larvae. In the aquariums submitted to low temperature (26 ° C), the mortality of 16.19% of the larvae was observed, and 6.66% reached the recruitment phase after 4 days of treatments. In the aquariums submitted to the highest temperature (32 ° C), 44.76% of the larvae died and 5.7% reached the recruitment phase after 4 days of treatment. High temperature in corals, associated with the presence of nutrients, refers to disturbances in the symbiosis between zooxanthella and coral, which leads to several physiological problems, leading to a greater sensitivity of these organisms to these conditions.

MEMBROS DA BANCA:
Externo à Instituição - ADALTO BIANCHINI - FURG
Presidente - 1148721 - CARLOS WERNER HACKRADT
Interno - 548.407.245-04 - MARCUS LUCIANO SOUZA DE FERREIRA BANDEIRA - IFBA