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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avalia??o ambiental de manguezais adjacentes aos campos petrol?feros de Macau e Serra (RN), como subs?dio ?s medidas mitigadoras ao processo erosivo / Avalia??o ambiental de manguezais adjacentes aos campos petrol?feros de Macau e Serra (RN), como subs?dio ?s medidas mitigadoras ao processo erosivo

Costa, Bruno Cesar Pereira da 19 July 2010 (has links)
Made available in DSpace on 2014-12-17T14:08:41Z (GMT). No. of bitstreams: 1 BrunoCPC_1-100_DISSERT.pdf: 2356033 bytes, checksum: ce14b7bf1ae1fe35ca852675e9da4636 (MD5) Previous issue date: 2010-07-19 / Among the various effects caused by the climate change and human intervention, the mangrove ecosystem changes through of the years has been worth mentioning, which hasn t known which are the pros and cons for the adjacent coastal and estuarine environments yet. It happens due to the present dynamism in these areas, besides of the difficult understanding of the processes associated with evolution. This study aimed to environmentally evaluate adjacent mangroves from the Macau and Serra oil fields, located on Rio Grande do Norte northern coast, to support the mitigating actions related to the containment of the erosive process, as well as, according to the principles of the Clean Development Mechanism (CDM), to assess the amount of atmospheric carbon sequestered by the studied ecosystem. An inventory was conducted through mangrouve mapping which has supplied this research, especially regarding to the structural characterization of mangrove areas. To understand the local mangrove behavior in a greater level detail, techniques of remote sensing, GIS and GPS were used to make an analogy between the current and past states of the mangrove studied, allowing to make anticipated projections for the future impacts or changes in that region. This study combined data from multispectral LANDSAT 5 TM, Landsat 7 ETM+ with radar microwave data from SAR RADARSAT-1, which increased the interpretation capacity of the data from optical sensor systems. The interpretations have been supported by the data field, representing a better and innovative methodology for the environmental and taxonomic characterization of mangrove forests considered. The results reveal that mangroves of the Ponta do Tubar?o Sustainable Development Reserve are biologically representative areas and providing a variety of benefits, especially for local communities, constituting the priority sites for actions development aimed at conservation. They also have been showing the necessity to make mitigating measures in order to recover degraded areas through reforestation or creating new areas of mangrove, as currently 7.1% of the mangrove forests studied are dead or in an advanced state of decomposition. The amount of atmospheric carbon sequestered proved very significant when analyzed for the whole area, which is able to sequester atmospheric 4,294,458 Ton CO2 per year / Dentre os diversos efeitos provocados pelas mudan?as clim?ticas e pela interven??o humana, as altera??es no ecossistema manguezal v?m merecendo destaque, cujas implica??es para os ambientes estuarinos e costeiros adjacentes ainda est?o distantes de serem conhecidas. Isto ocorre devido ao dinamismo presente nessas ?reas, assim como a dif?cil compreens?o dos processos associados ? evolu??o das mesmas. O presente estudo teve como principal objetivo avaliar ambientalmente manguezais adjacentes aos campos petrol?feros de Macau e Serra, localizados no litoral setentrional do Rio Grande do Norte, como subs?dio ?s medidas mitigadoras ao processo erosivo, al?m de, dentro dos princ?pios do chamado Mecanismo de Desenvolvimento Limpo (MDL), avaliar a quantidade de carbono atmosf?rico sequestrado para o ecossistema estudado. Atrav?s de mapeamento do manguezal, foi realizado um invent?rio, o que forneceu subs?dios para o delineamento desta pesquisa, principalmente, no que diz respeito ? caracteriza??o estrutural da ?rea de manguezal. Para entender o comportamento do manguezal em quest?o em um n?vel maior de detalhe, buscaram-se explica??es em unidades espaciais maiores. T?cnicas de Sensoriamento Remoto, SIG e GPS forneceram informa??es de compara??o entre os estados atual e passado do manguezal, possibilitando proje??es antecipadas para os futuros impactos ou altera??es desta regi?o. Este trabalho combinou dados multiespectrais do LANDSAT 5 TM, LANDSAT 7 ETM+ com dados de microondas de radar do tipo SAR do RADARSAT-1, ampliando a capacidade de interpreta??o dos dados de sistemas de sensores ?ticos. As interpreta??es foram apoiadas com dados de campo, objetivando uma melhor e inovadora metodologia para a caracteriza??o ambiental e taxon?mica das florestas de mangue em quest?o. Os resultados encontrados revelam que os manguezais da Reserva de Desenvolvimento Sustent?vel Estadual Ponta do Tubar?o s?o ?reas representativas biologicamente e que fornecem uma variedade de benef?cios, principalmente para as comunidades locais, constituindo-se de s?tios priorit?rios para o desenvolvimento de a??es com vistas a sua conserva??o. Revelam tamb?m a necessidade de se tomar medidas mitigadoras no sentido de recuperar as ?reas degradadas ou atrav?s do reflorestamento se criar novas ?reas de manguezal, pois atualmente 7,1% das florestas de mangue estudadas encontram-se mortas ou em estado de decomposi??o bem avan?ado. A quantidade de carbono atmosf?rico sequestrado se mostrou bem significativa quando analisado para toda a ?rea em quest?o, sendo esta, capaz de sequestrar 4.294.458 Ton CO2 atmosf?rico/ano

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