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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

Dynamic of landscape of the river estuary apa mundau: space-time evolution and potential environmental / DinÃmica das paisagens da APA do estuÃrio do rio MundaÃ: evoluÃÃo espaÃo-temporal e potencialidades ambientais

JociclÃa de Sousa Mendes 10 July 2012 (has links)
CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior / As unidades de paisagem do litoral cearense possuem um grande valor paisagÃstico, entretanto vÃm sendo utilizadas de forma incorreta, principalmente nas Ãltimas dÃcadas, comprometendo a sustentabilidade ecolÃgica dos ecossistemas e provocando mudanÃas nas caracterÃsticas dos ambientes naturais, bem como no modo de vida das comunidades tradicionais. Nesse contexto, a criaÃÃo de Ãreas de ProteÃÃo Ambiental està sendo vislumbrada como uma alternativa para controlar essas mudanÃas e manter as relaÃÃes ecolÃgicas estabelecidas entre os seres vivos e o ambiente fÃsico. A pesquisa, pois, teve o objetivo de elaborar um diagnÃstico da APA do EstuÃrio do Rio MundaÃ, localizada na costa oeste do estado do Cearà e propor medidas de gestÃo integrada. Para isso, o estudo abrangeu a anÃlise das condiÃÃes geoecolÃgicas da Ãrea, dos usos a que està sendo submetida e dos efeitos decorrentes dessa utilizaÃÃo, por influÃncia de fatores de ordem ambiental e social. O referencial teÃrico utilizado foi o da geoecologia das paisagens, que ofereceu as condiÃÃes de realizar a anÃlise do espaÃo geogrÃfico, a partir da junÃÃo de procedimentos tÃcnicos contemporÃneos das ciÃncias ambientais, como: i) anÃlise do Ãndice de CondiÃÃo de Vida e Moradia (ICV-MO); ii) anÃlise da qualidade da Ãgua, na qual foi realizado um diagnÃstico da situaÃÃo atual do sistema estuarino; iii) tÃcnicas cartogrÃficas, que possibilitaram a realizaÃÃo da anÃlise espaÃo-temporal da APA, verificando a dinÃmica atuante, assim como os usos realizados. A APA possui sistemas ecolÃgicos de grande importÃncia natural e econÃmica para a regiÃo em que estÃo inseridos, mas que vÃm sendo, entretanto, explorados e ocupados de forma incorreta, gerando diversos impactos ambientais e causando degradaÃÃo, tanto pelas intervenÃÃes humanas sem planejamento ambiental como pela falta de cumprimento da legislaÃÃo vigente. Verificou-se que as mudanÃas significativas na paisagem da APA nos Ãltimos cinquenta e quatro anos foram causadas por intensa dinÃmica ambiental e por prÃticas sociais e econÃmicas que contrariam a legislaÃÃo brasileira, tais como ocupaÃÃo indevida da Ãrea de manguezal, mineraÃÃo ilegal nas dunas, deposiÃÃo inadequada de resÃduos sÃlidos e atividades de carcinicultura no leito do rio. Todavia, concluiu-se que a Ãrea do estuÃrio do rio MundaÃ, apesar de apresentar problemas ambientais, sociais e estruturais, ainda mantÃm um ambiente propÃcio ao desenvolvimento com qualidade, desde que sejam revistos a funcionalidade e os objetivos da APA para a adoÃÃo e o exercÃcio de planos de gestÃo e de fiscalizaÃÃo de forma apropriada e contÃnua. / The landscape units of the coastal zone of the Brazilian state of Cearà have considerable scenic value, but have been exploited inadequately, especially in recent decades. This process has affected the ecological sustainability of the local ecosystems and provoked profound changes in the characteristics of both natural environments and the lifestyle of local traditional communities. In this context, the creation of environment protection areas (known as APAs in Brazil) is considered to be a practical alternative for the control of these changes and the management of the ecological relationships established between living organisms and the physical environment. The objective of the present study was thus to provide a diagnosis of the APA of the estuary of the Mundaà River, located in western CearÃ, and propose measures for the integrated management of the area. The study includes the analysis of the geo-ecological conditions of the area, the forms in which it is being exploited, and the effects of this use, based on the evaluation of both social and environmental factors. The study was based on a landscape geo-ecological approach, which offers a baseline for the analysis of geographic space, derived from the integration of modern technical environmental science procedures, such as (i) the analysis of the Living and Dwelling Conditions Index (ICV-MO); (ii) analysis of water quality, based on a diagnosis of the current situation of the estuarine system; (iii) cartographic techniques, which permitted the development of a spatial-temporal analysis of the APA, the identification of the current dynamics, and the types of land use practiced in the area. The APA encompasses ecological systems that have considerable natural and economic value for the region in which they are located, but which are currently being exploited and occupied inadequately. This has generated a variety of environmental impacts and caused degradation, not only through the lack of environmental planning, but also disrespect for the current legislation. A number of significant changes were identified in the landscape of the APA over the past 54 years, which have been caused by the intense dynamics of the natural environment, as well as social and economic practices, which have ignored Brazilian legislation, such as the gratuitous occupation of mangroves, illegal mining of dunes, inadequate disposal of solid waste, and shrimp farming in the river bed. Despite the environmental, social, and structural problems identified during the present study, the present study concluded that the estuary of the Mundaà River can still be developed satisfactorily, as long as the objectives and operation of the APA can be adapted to include continuous management and monitoring procedures appropriate to the characteristics of the area.

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