dc.contributor | Fernandes, Marisa Narciso | |
dc.contributor | http://lattes.cnpq.br/3021357484136942 | |
dc.contributor | Monferrán, Magdalena | |
dc.contributor | http://lattes.cnpq.br/5391583114634391 | |
dc.creator | Souza, Iara da Costa | |
dc.date.accessioned | 2018-02-08T17:13:15Z | |
dc.date.accessioned | 2022-10-10T21:23:40Z | |
dc.date.available | 2018-02-08T17:13:15Z | |
dc.date.available | 2022-10-10T21:23:40Z | |
dc.date.created | 2018-02-08T17:13:15Z | |
dc.date.issued | 2017-03-10 | |
dc.identifier | SOUZA, Iara da Costa. Estudo da origem e transferência de metais e metalóides em áreas de manguezal, por meio de análises isotópicas na cadeia trófica e efeitos bioquímicos e morfológicos em Centropomus parallelus Poey, 1860. 2017. Tese (Doutorado em Ecologia e Recursos Naturais) – Universidade Federal de São Carlos, São Carlos, 2017. Disponível em: https://repositorio.ufscar.br/handle/ufscar/9405. | |
dc.identifier | https://repositorio.ufscar.br/handle/ufscar/9405 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/4041828 | |
dc.description.abstract | Estuaries and coastal zones are affected by different types of anthropogenic influences
derived from harbour activities, industrial and agriculture discharge. Two mangrove
areas in two estuarine ecosystems: Bay of Vitória and Santa Cruz in the State of Espírito
Santo, Brazil, with different levels of contamination by metals were evaluated to
identify the origin and transfer of the metals and metalloids, through the trophic chain to
a top-chain organism (the fish, Centropomus parallelus). The concentrations of metals
and metalloids were analyzed in the abiotic matrix (sediment, interstitial water, surface
water and bottom water) and biotic (samples of plankton and shrimp) to determine the
biomagnification of these pollutants along the trophic chain and their origin was
determined using isotopic correlations (carbon, nitrogen and lead). At the same time,
metal and metalloid concentrations in gills, muscles, liver and kidney of C. parallelus,
as well as biochemical biomarkers of exposure and effect in these organs were
evaluated. Ultrastructural analyzes were performed on gills, muscles, liver, gonad and
kidney of C. parallelus to evaluate metals internalization and subcellular localization.
Linear regression was performed for metal accumulated data for all food web to
evaluate biomagnification, biodilution or non-interference of the trophic chain in the
accumulation of the different metals evaluated. Stable isotope results are interpreted
using a new algorithm (K-means; machine learning) to integrate data from the origin
and transfer trough the food web; Multivariate statistical analysis were performed to
integrate physical, chemical and biological data for C. parallelus tissues. Results of
δ13C and δ15N confirmed plankton and trees as the base of the food web; indicated the
crab, shrimp and oyster as intermediate levels, and the fish, C. parallelus, was
confirmed as the top of the food web. δ15N also indicated different anthropic impacts in
the estuaries, with Bay of Victory being impacted by fertilizers. The 87Sr / 86So
isotopic ratio showed a highlight influence of marine water on the ecosystems. The lead
fingerprint suggests that the atmospheric particulate material is the source of metal
contamination in the ecosystems, being strongly influenced by metallurgical activities.
The plant-crab-fish trophic chain presented higher biomagnification potential, while
biodilution was more observed in the plankton-shrimp-fish and plankton-oyster trophic
chains. Ultrastructural analysis of the abiotic and tissues samples of C. parallelus
showed the internalization of metallic nanoparticles in cellular structures (vesicles;
nucleus) of all organs analyzed. Nanocrystallographic analyzes shown that metallic
nanoparticles found were compatible with those found in atmospheric particulate
matter. Biomarkers data corroborate as ultrastructural analyzes, suggesting that metal
accumulated cannot be all available. Responses and/or absence of them in a given organ
show specific sensitivity of organs and tissues to the accumulation of metals. Metal
levels in the gills indicate water contamination and decreased organ sensitivity in most
metals; muscle was the least reactive tissue. Biochemical responses suggested that the route of metal elimination is through the gills and kidney. Hepatopancreas and kidneys
are important organs of detoxification, being C. Parallelus able to support as
environmental conditions, however, imposed with energy expenditure that can influence
a growth rate and reproduction processes of this species. | |
dc.language | eng | |
dc.publisher | Universidade Federal de São Carlos | |
dc.publisher | UFSCar | |
dc.publisher | Programa de Pós-Graduação em Ecologia e Recursos Naturais - PPGERN | |
dc.publisher | Câmpus São Carlos | |
dc.rights | Acesso aberto | |
dc.subject | Estuário | |
dc.subject | Metalografia | |
dc.subject | Contaminantes | |
dc.subject | Robalo-peva | |
dc.subject | Estuary | |
dc.subject | Metallography | |
dc.subject | Contaminants | |
dc.subject | Fat snook | |
dc.title | Estudo da origem e transferência de metais e metalóides em áreas de manguezal, por meio de análises isotópicas na cadeia trófica e efeitos bioquímicos e morfológicos em Centropomus parallelus Poey, 1860 | |
dc.type | Tesis | |