Cobia fish cage is the most popular marine culture species raised in Phu Quoc Island, Vietnam. For its sustainable development, there is a need to determine the carrying capacity to avoid nega-tive marine environmental impact in the future. This study was carried out to collect water samples each two months at the lowest and highest tides at four points around the farming area in Rach Vem, Phu Quoc Island, Kien Giang Province from February to October 2011. Water quality in cobia cage culture was surveyed to assess the environmental status of coastal aquaculture areas including seven parameters such as DO, COD, BOD, TSS, TN, TP and Chlorophyll-a. These parameters are suitable to rear cobia fish cage in this area. Nitrogen and phosphorus are considered as the principal nutrients produced by the cobia fish farm and affecting water environment. This study found that the carrying capacity for fish cage farming in the area is 290.96 to 727.81 tons (based on total nitrogen) and 428.64 to 1,383.88 tons (based on total phosphorus) from February to Au-gust 2011. The maximum number of cobia cages should be, based on total nitrogen, from 64 to 266 and, based on total phosphorus, from 94 to 253. Moreover, this study examined the possibility of remote sensing and geographic information system (GIS) technique based on Object-based Image Analysis (OBIA) method by THEOS imagery for mapping of cage culture facilities and detect the location for cobia cage culture in study area. / Cá bớp nuôi lồng bè là một trong những loài cá nuôi phổ biến khu vực ven biển Phú Quốc, Việt nam. Nhằm phát triển bền vững vùng ven biển, đề tài thực hiện đã xác định và đánh giá hiện trạng môi trường nước và sức tải môi trường của nghề nuôi cá bớp lồng bè ở đảo Phú Quốc. Nghiên cứu này được thực hiện thông qua việc thu mẫu môi trường nước mỗi 2 tháng theo mức nước triều cao nhất và thấp nhất tại 4 điểm quanh khu vực nuôi tại ấp Rạch Vẹm, huyện Phú Quốc, tỉnh Kiên Giang từ tháng 02-10/2011. Chất lượng nước khu vực nuôi thủy sản cũng được khảo sát với 7 chỉ tiêu gồm DO, COD, BOD, TSS, TN, TP, Chlorophyll-a. Các thông số chất lượng môi trường này phù hợp nuôi cá bớp tại khu vực nghiên cứu dựa trên tiêu chuẩn chất lượng môi trường. Trong nghiên cứu này, đạm và lân là 2 thông số được sử dụng để tính toán sức tải môi trường. Sức tải môi trường được tính toán cho khu vực nuôi cá bớp dao động khoảng từ 290.96 tấn đến 727.81 tấn (tính trên hàm lượng đạm tổng số) và từ 428,64 tấn đến 1.383,88 tấn (tính trên hàm lượng lân tổng số) trong thời gian từ tháng 2 đến tháng 10 năm 2011. Số lượng tối đa lồng bè nuôi cá bớp khoảng từ 64 đến 266 (đạm tổng số) và từ 94 đến 253 (lân tổng số) dựa vào phân tích hồi quy tương quan. Bên cạnh đó, công nghệ viễn thám và hệ thống thông tin địa lý (GIS) đã được ứng dụng bằng cách sử dụng ảnh THEOS để xác định vị trí và phân bố không gian khu vực nuôi cá lồng bè dựa trên phương pháp phân tích đối tượng theo hướng (OBIA).

Ce mémoire a comme objectif de présenter une revue de la littérature et une analyse comparative des différents modèles existants pour le calcul de la capacité de support d’un plan d’eau aux apports en phosphore. Ce document a aussi pour but d’évaluer les différentes options pour l’utilisation de ce genre d’outil au Québec, ainsi que d’amorcer une réflexion sur les applications possibles de ce concept au niveau local, en lien avec l’aménagement du territoire des bassins versants. L’analyse comparative des modèles théoriques, combinée à la réflexion d’acteurs clés impliqués actuellement dans un processus qui consiste à tester leur utilisation dans les Laurentides au Québec, a permis de mettre en relief l’importance de calibrer les modèles régionalement. De plus, certains avantages semblent résider dans l’utilisation d’un modèle de nature empirique afin d’effectuer les prédictions sur les apports naturels et totaux en phosphore pour les lacs de cette région. Par contre, l’utilisation d’une approche de type « bilan de masse », s’avère tout de même indispensable afin de relativiser l’importance des différents apports anthropiques en phosphore du bassin versant. Dans l’avenir, l’utilisation de tels modèles permettra possiblement de justifier certaines mesures restrictives au développement des bassins versants, qui pourront s’insérer parmi les outils d’urbanisme actuels. Ce sont principalement les municipalités qui détiennent les pouvoirs nécessaires afin d’intégrer les prescriptions découlant de ce genre d’analyse à l’aménagement du territoire des bassins versants. Plusieurs outils d’urbanisme, tels que les plans d’aménagement d’ensemble (PAE) ou bien les règlements de zonage et de lotissement, semblent donner assez de latitude afin de permettre aux municipalités d’intervenir en ce sens. Toutefois, les modèles de capacité de support ne pourront pas être utilisés afin de calculer un nombre précis d’habitations qu’il est possible de construire dans le bassin versant d’un lac. / This study presents a literature review of current carrying capacity models developed in Ontario and Quebec (Canada) for the estimation of phosphorus (P) loading in lakes. Another objective is to evaluate their applications to land and watershed management practices in Quebec. A comparison of theoretical and empirical models, combined with the observations of keys stakeholders, confirms the importance of calibrating models regionally. The analysis further reveals that empirical models estimate more accurately P concentrations in lakes. However, the use of traditional mass balance approaches is still a necessity for the estimation of different P sources in the watershed. These models can support decision makers and land managers in Quebec in the application of more restrictive measures in lakes where the carrying capacity is currently exceeded. In Quebec, the use of the models and their implementation in the legislation will be a municipal responsibility. Many urbanism tools already allow this kind of intervention (zoning, « outils à caractère discrétionnaire »). But, model use alone will not be sufficient to justify a total interdiction of land development in a watershed or to impose a strict limit to house and cottage development.

The purpose of this study was to develop and test a predictive understanding of the vegetation dynamics of the Lowveld of South Africa (30°35'E to 30°40'E and 24°00'S to 25°00'S). The study covered about 5000 km2 in Adjacent Private Protected Areas (APPA) adjoining the Kruger National Park (KNP). Data gathering (800 sites; 23 properties) commenced in 1989 and those recorded up to 2004 are reported here. The value, both ecological and economic, of the wildlife and tourism industry dependent on this savanna region is discussed in both historical and current perspectives. A range of land-use objectives and anthropogenic interventions were exposed. The properties ranged in size from 30 to 800 km2 and formed an effective and extensive manipulative experiment for investigating interaction of bush density, animal stocking, use of fire and landscape-scale processes. The first descriptive classification (at 1:250 000) of the area was developed using Inverse Distance Weighted interpolations. This confirms similar landscape/vegetation patterns in the KNP and Mocambique. The current mode of determining stocking density or carrying capacity was interrogated and indices suitable for complex multi-species systems developed. This was done in the context of equilibrial/disequilibrial paradigms. Application of the original indices resulted in drought-related declines in animal biomass of 4000 kg km2 over 20 years due to overestimation of carrying capacity. The model proposed here uses rainfall, animal type, biomass and vegetation parameters to determine stocking density for both coarse (regional) and ranch-specific scales. Principal driving determinants (rainfall, geology, soil type, tree density canopy cover, animal numbers, feeding classes and fire) of vegetation structure and their influence on the herbaceous layer were investigated. Groupings on ecological potential showed 'high' potential areas are less sensitive to animal impact than those classified as 'low' potential. Sustainability, embedded in a forward-looking component viz. Strategic Adaptive Management (SAM) with well-articulated endpoints viz. Thresholds of Potential Concern (TPCs) was used to study fluctuations in animal populations with Connochaetes taurinus (Blue wildebeest) as the case study. The TPC approach provides strong pointers for proactive management aimed at maintaining the system within bands defined by TPCs supporting operationally practical and periodically reviewed objectives. / Thesis (Ph.D.)-University of KwaZulu-Natal, Pietermaritzburg, 2005.

Grazing lands in Eritrea are degraded due to decades of overstocking and consequent overgrazing. Since the rangelands are accessible to entire village communities, organisation and coordinated decision making regarding the management of these resources is not often achieved. Farmers are not motivated enough to make investments to improve a communally owned resource due to the prevailing common access grazing systems. A field survey was undertaken interviewing 12 farmers in the private access commercial and 80 farmers in the common access subsistence grazing using face to face interviews in the Barka and Arado cattle farming communities in four out of the six regions in Eritrea. Debub, Gash-Barka, S. Keih Bahri and Maekel regions were selected using stratified and simple random sampling methods. The regions were chosen based on various agroecological zones where the representatives of different grass species and the two most common cattle breeds in Eritrea (Arado and Barka) are found. The survey included the collection of data on village and household characteristics focusing on rangeland grazing management systems and additional sources of supplementary forage. The study uses several stages of analysis like principal component analysis accompanied by regression analysis together with descriptive statistics and ordination diagram. The commercial farmers addressed grazing constraints by investing in improved grazing through planting 258 ha per farmer of drought resistant seeds and 1767 vs. 8 cactus slices per farmer and covered 75% vs. 40% of forage requirements from grazing resources compared to the subsistence farmers, respectively, during 2002. These results were achieved because 78% of the commercial farmers adopted controlled stocking rates. In common access grazing, the costs of collective action to control cattle stocking rates are high, making imple mentation of stocking rate controls difficult. As a consequence, 65% of the subsistence farmers were forced to migrate their cattle looking for grazing forage in the dry season during the year. The outcomes of migration were evidenced by the results of severe overgrazing and degradation on the rangelands proximity to villages in Debub and Maekel regions and the populated area of Gash_Barka region. The increased number of animals resulting in high grazing pressure was the consequence of migration. Ten vs. six percent of mortality rates was reported for the subsistence systems compared to the commercial systems respectively. The lower results of milk yield, calving rates and off- take rate productivity indicated in the different stages of analysis for the subsistence farmers were the consequences of the lack of the adoption of controlled stocking rates primarily constrained by the migration. The Barka and Arado cattle farming systems are kept under common access grazing systems. Compared to the Arado cattle farming, the Barka cattle farming region had relatively better access to grazing forage. The better quality of grazing in this region is attributed to a naturally low stock density in the region. During 2002, the Barka cattle farming had 1087 vs. 721 Lit of milk yield, 63% vs. 53% of calving productivity and 9.3% vs. 10.9% of mortality rates than the Arado cattle farming regions respectively, due to access to a wider area of grazing lands and more labour inputs. The Barka cattle area farmers are agro pastoralists and usually focus on grazing dairy cattle farming than crop farming. They increased calving rate productivity and decreased mortality rates by increasing the proportion of lactating cows and decreasing the proportion of oxen compared to the Arado cattle farming. The Arado cattle farming had higher offtake rates and income from cattle sales compared to the Barka cattle farming region. The higher off- take rate, which is an index of percentage of cattle sold, for the Arado cattle was probably linked to the shortage of grazing forage and increased herding costs. The Barka and Arado cattle farmers had a shortage of quality and quantity crop residue winter forage during 2002. Farmers were dependent only on rain fed cropping. The application of crop rotation, fallow and chemical fertilizers were low to enhance soil nutrients. Out of the total crop residues forage produced, only 22% and 15% of legumes residue DM forage was produced for the Barka and Arado cattle farmers respectively. Agro- industrial and crop farming by-products supplementary feeds were also limited due to the shortage of feeds in the country during the year. In general, government intervention is important to bring institutional changes to promote the adoption of controlled stocking rates to alleviate the shortage of grazing forage. / Thesis (M.Sc.)-University of KwaZulu-Natal, Pietermaritzburg, 2007.

This study was aimed at analysing communal land use management practices and policies towards sustainability and climate resilience. The objectives of this study were to assess rainfall variability, climate change impact, adaptation practices and impediment factors for adaptation on the one hand and, on the other, analysing the pressure, scrutinising the sustainability of institutional practices, and assessing policy setting and its application status in managing communal lands. To conduct the study, a household survey, key informant interviews and group discussions were used. It employed both quantitative and qualitative methods. For analysis, rainfall variability trend analysis, different empirical formulas, Principal Component Analysis and analysis of variance were used. In addition, Qualitative Content Analysis technique and descriptive statistical tools were also used. The study found that there was spatiotemporal rainfall variability. About 18 extreme wet and 8 extreme dry events were depicted out of 194 frequencies of events. The most outstanding manifestations of climate change/variability impacts identified were: water scarcity, migration, severe erosion and feed scarcity. Applying biophysical measures on communal lands, practicing area enclosure and constraction of feeder road were moderately excersised adaptation and mitigation practices while, low level community awareness was the most outstanding barrier for community adaptation. Besides, feed source and fuel biomass energy did not satisfy community demand. Government recognition to support community user groups, the existence of community labour contribution and congruence between government legislation and community by-laws were found moderately strong. Besides, communal land administration and use of legislative setting and instruments to govern land administration were adequately in place to implement communal land use and management. However, workability of by-laws in applying them at the ground was a major weakness. In conclusion, the study revealed that there exist generally a weak communal land use management practices and policy implementation towards enhancing sustainability and climate resilience. Hence, the following recommendations were forwarded: enhancing community awareness, encouraging communities to establish their own private woodlots and grazing areas to reduce the pressure on communal land, applying proper communal land resource use and management plans and certifying communal lands with demarcation and maps should be given due emphasis to enhance sustainability. Moreover, policy and legislation evaluation and revision to improve its application at the ground is fundamental. On top of this, further research endeavour is still paramount important to scrutinize the integral effects of the biophysical, social, cultural and legislative dimensions for better sustainable and climate resilient communal land use management practices and policy implementation / College of Agriculture and Environmental Sciences / Ph. D. (Environmental Management)

This dissertation explores the emergence of surf tourism as a significant aspect of rural communities. It uses an inductive qualitative approach focused on Tofino, British Columbia, Canada as an example to provide an in-depth exploration of a rural community effected by this phenomenon. Qualitative interviews were conducted with a snowball sample of key informants to address the following research objectives: (1) What factors have influenced the evolution of surf tourism in Tofino; (2) How might the evolution of surf tourism in this case study relate to the Tourism Area Life Cycle (TALC); (3) What is the impact of surf tourism on the broader community development of Tofino? Analysis of the Tofino data elicited following themes: (1) For some, surfing is a desirable lifestyle, reflecting in some ways the concepts of specialization, serious leisure, and community’s identity; (2) Surf shops are a community hub for local surfers and surf tourists; (3) Pacific Rim National Park plays a critical role in the region, contributing to surfing and the surf tourism industry, but has yet to fully engage with surfers or the surfing industry; (4) New and more affordable equipment technology has brought increased access to cold-water surf and surf tourism, reducing what may have constrained the early development of surf tourism; (5) Considerable increases in the supply and demand for surfing in Tofino have occurred, tempered by the increased number of surfing competitions and other new tourism segments that exist in the community; (6) Increasing safety issues may undermine the growth of surf tourism; (7) Limits to surf tourism growth are evident regarding facility and physical carrying capacity; (8) As a result of the considerable growth of surfing in Tofino, recreational crowding, and conflict are in evidence, as are coping mechanisms; (9) ‘Localism’ exists in Tofino, but perhaps less so than in other destinations which have a fixed beach break; (10) Surf tourism has the potential for positive and negative impacts on First Nations communities in the region; and (11) Local government plays an important role. These themes were then analyzed and linked to the following theoretical concepts: serious leisure; specialization; leisure constraints; localism; violence; conflict; crowding, carrying capacity, amenity migration, the Tourism Area Life Cycle (TALC); and, rural tourism. This led to some intriguing findings. For example, unlike most other popular surf tourism destinations, crowding is not so apparent in the surf because the surf breaks in the Tofino area are primarily beach breaks that constantly shift as the bathymetry of the ocean floor changes with tides and currents, resulting in constant wave changes. This contrasts with fixed break conditions found elsewhere, so in Tofino it is easier to avoid other surfers by simply moving to another part of the wave. When the Tofino findings were compared with TALC, some similarities and differences were noted. Factors that appear to be consistent with the TALC model are: increasing numbers of tourists, changing type of tourists (e.g. more mass tourists, compared to the early days of surf tourism), increasing numbers of tourism facilities, increased levels of marketing, increased levels of interaction between visitors and local communities (perhaps leading to instances of conflict, and localism), and increased economic benefits to the community. However, one possible departure from the expected trajectory is impacts on the natural environment, which have increased in some ways, but are improved in other ways. There has been some environmental change in terms of the growth in the town of Tofino, and with the development of lodgings near to the surrounding beaches. However, much of the larger landscape, remains largely intact or less impacted than what might have occurred without the presence of Pacific Rim National Park, and the Clayoquot Biosphere Reserve. Further, the TALC model suggests that the development of tourism will lead to lesser local control of development. The Tofino findings suggest that there remains a great deal of local control and that local government support the tourism industry, including surf tourism. It was noted that the emerging surf tourism refers to several concepts found in the general nature tourism literature, such as crowding, conflict and carrying capacity, but the surf tourism literature tends to overlook the complexity of some of these concepts. For example, future surf tourism research might consider more explicit examination of the various dimensions of conflict described in this study, including in group and outgroup conflict, interpersonal conflict and social values conflict. There is little evidence of the incorporation of these concepts in the surf tourism literature. Finally, the data exposed a high level of social capital within the surf community and also between surfers and non-surfers as a facet of a close-knit rural community dependent to a degree on surf tourism as a social driver manifesting in mutual cooperation, trust and reciprocity occurring in social institutions such as surf-shops. / Graduate

Made available in DSpace on 2016-06-02T20:00:53Z (GMT). No. of bitstreams: 1 5561.pdf: 4325885 bytes, checksum: 17098e745fb832216ed81c3a3af560d5 (MD5) Previous issue date: 2002-03-15 / Financiadora de Estudos e Projetos / The present work consisted in the application of a method for environmental sustainability analysis for land use and soil occupation of Ilha Comprida city, located in the southern state of São Paulo, the estuarine-lagoon complex Iguape-Cananéia- Paranaguá, region of Vale do Ribeira de Iguape. Land use and soil occupation of Ilha Comprida and the concept of sustainability as a theoretical, technical and empirical supporting body were studied. This work used a methodology based on a Method developed by a Study Group from UFSCar (Federal University of São Carlos) called Strategic Planning and Sustainable Urban Environment (PESMU), which incorporates the sustainability issue in the analysis and evaluation of urban context projects. Therefore, the methodology makes use of flow charts, interaction matrices, characterization sheets, used together, directing the analysis of environmental sustainability in the city, pointing favorable, neutral or unfavorable trends to environmental sustainability. Practical applications of the method in different areas of the city were carried out, showing the land use and soil occupation as the action variable (street construction layout, plot, deployment of building plots, urban uses and buildings geometries) and environmental issues as control variables. Comprising an easy applicability methodology, it proved to be feasible, and can be added other possible information and more complex analysis tools to enable the expansion of its applicability. / O presente trabalho se constituiu na aplicação de um método para análise da sustentabilidade ambiental do uso e ocupação do solo do Município de Ilha Comprida, localizado no extremo sul do estado de São Paulo, no Complexo estuarino-lagunar de Iguape-Cananéia-Paranaguá, região do Vale do Ribeira de Iguape. Para tanto foram estudados: o uso e ocupação do solo do município de Ilha Comprida e o conceito de sustentabilidade como corpo de sustentação teórico, técnico e empírico. No presente trabalho, é feita a utilização de uma metodologia baseada em um Método desenvolvido pelo Grupo de estudos em Planejamento Estratégico e Sustentável do Meio Urbano (PESMU) da UFSCar, o qual incorpora a questão da sustentabilidade na análise e avaliação de projetos no contexto urbano. Assim, a metodologia faz uso de fluxogramas, matrizes de interações, fichas de caracterizações, utilizadas conjuntamente, direcionando a análise da sustentabilidade ambiental do Município, apontando tendências favoráveis, desfavoráveis ou neutras à sustentabilidade ambiental. Foram realizadas aplicações práticas do método em diferentes áreas do município, evidenciando o uso e ocupação do solo como a variável de ação (arruamento, lote, implantação de loteamentos, usos urbanos e geometrias das edificações) e os aspectos ambientais como as variáveis de controle. Compreendendo uma metodologia de fácil aplicabilidade, mostrou-se viável, podendo ser introduzidas eventuais informações e instrumentos mais complexos de análises que possibilitem a ampliação da sua aplicabilidade.

Made available in DSpace on 2015-05-07T14:49:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-02-21 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / Reef environments attract yearly, a huge influx of tourists and recreationists who relentlessly pursue the leisure and knowledge of marine biodiversity, generating a significant profit for the economy of locales with peculiarities for tourism and recreation. However, the touristicrecreational activity at environmental reefs presents negative implications for local biodiversity if not associated to a planned process, mainly when not interrelated to social, economical, and biological dimensions throughout the planning. The reef environments at the beaches of Seixas, Penha, and Arraial (on southern littoral of João Pessoa, capital of Paraíba state, Northeast Brazil) have a lower touristic-recreational influx as compared to other reefs in the state of Paraíba. However, there is already a timid touristic promotion advertising the reefs of that part of southern littoral of Paraíba, mostly the ones at Penha beach. Therefore, it was aimed in the present dissertation to present a proposal concerning tourism planning and recreation on environmental reefs situated at the above-mentioned beaches, through zoning and evaluation of recreational carrying capacity. Firstly, it was performed a diagnosis of the areas by focusing socio-economic and biological aspects that generated important information for constructing the zoning proposal and estimating the recreational carrying capacity (Cifuentes, 1992). With respect to the biological aspects, it was performed an analysis of the distribution of the cnidofauna (with emphasis on scleractinian corals, zoanthidean, and calcareous hydroids) in areas with and without recreational use, through visual records carried out in October and November 2005. With respect to the socioeconomical aspects, the artisanal fishermen s way of life at the Penha beach was characterized, as well as their perceptions on several subjects, like the reef environments, conservation units, and excluded zones for fishing and tourism, by applying structured interviews as data collection technique which was carried out in June and July 2005. The following cnidarians species were identified: five scleractinians (Siderastrea stellata, Mussismilia harttii, Montastrea cavernosa, Agaricia agaricites and Porites astreoides; four zoanthideans (Palythoa caribaeroum, Protopalythoa variabilis, Zoanthus sociatus, and Zoanthus nymphaeus); and one calcareous hydroid (Millepora alcicornis). A greater biodiversity was observed in the area without recreational use. The fishermen at the Penha beach usually go to the reef areas for fishing and leisure, and they showed to be receptive to tourism and to the proposal for the establishment of a conservation unit in the area. Four zone types were defined for the zoning, with distinct uses and patterns, besides a buffer zone adjacent to the continent, since indirect impacts caused by local human actions may reduce the reefs health. The recreational carrying capacity was established from 26 visits per day or 4,680 per year carried out to the reefs of Seixas beach. It is proposed here a flexible and adjustable touristic-recreational planning for the study area, which might be partly modified throughout time, as new data on local biota, physicochemical parameters, and increase of touristic-recreational influx may come out / Os ambientes recifais atraem, anualmente, um contingente de turistas e recreacionistas ávidos pelo divertimento e conhecimento da biodiversidade marinha, gerando um aporte financeiro significativo para as economias de locais com peculiaridades para o turismo e recreação. No entanto, a atividade turístico-recreativa em ambientes recifais reveste-se de um caráter destrutivo para a biodiversidade local quando desvinculado de um processo de planejamento, sobretudo quando não interrelaciona as dimensões sociais, econômicas e biológicas no transcorrer do planejamento. Os ambientes recifais das praias dos Seixas, Penha e Arraial (litoral sul da cidade de João Pessoa-PB) possuem um fluxo turísticorecreativo inferior ao de outros ambientes recifais da Paraíba. No entanto, já existe uma tímida promoção turística divulgando os recifes da área, sobretudo os da Penha. Assim, o objetivo desta dissertação foi o de apresentar uma proposta de planejamento do turismo e da recreação para os ambientes recifais das praias acima mencionadas, através do zoneamento e da avaliação da capacidade de carga recreativa. Num primeiro momento, o diagnóstico das áreas de estudo fez-se necessário, enfocando aspectos biológicos e sócioeconômicos, que geraram subsídios para a construção da proposta de zoneamento e para a determinação da capacidade de carga recreativa. Com respeito aos aspectos biológicos, foi realizada uma análise da distribuição da cnidofauna (com ênfase nos corais escleractínios, zoantídeos e hidróides calcários) em áreas com e sem uso recreativo, através de registro visual, nos meses de outubro e novembro de 2005. Quanto aos aspectos sócio-econômicos, o modo de vida dos pescadores artesanais da Penha foi caracterizado, bem como suas percepções sobre diversos assuntos, como ambientes recifais, unidades de conservação, zonas de exclusão de pesca e o turismo, utilizando a entrevista estrutura como técnica de coleta de dados, nos meses de junho e julho de 2005. Foram identificadas cinco espécies de corais escleractínios (Siderastrea stellata, Mussismilia harttii, Montastrea cavernosa, Agaricia agaricites e Porites astreoides; quatro de zoantídeos (Palythoa caribaeroum, Protopalythoa variabilis, Zoanthus sociatus, e Zoanthus nymphaeus); e um hidróide calcário (Millepora alcicornis). A maior biodiversidade foi observada na área sem uso recreativo. Os pescadores da Penha utilizam os ambientes recifais para o lazer e a pesca, e se mostraram receptivos ao turismo e a proposta de criação de uma unidade de conservação na área de estudo. Para o zoneamento foram definidos quatro tipos de zonas, com usos e padrões distintos, e uma zona de amortecimento na porção terrestre adjacente, pois os impactos indiretos provocados pela ação humana podem diminuir a saúde dos recifes. A capacidade de carga recreativa foi definida em 26 visitas/dia ou 4.680 anuais para o ambiente recifal da praia dos Seixas. Propõe-se aqui um planejamento flexível, ajustável e passível de ser modificado, ao longo do tempo, com o advento de dados referentes à biota local, aos parâmetros físico-químicos e ao aumento do fluxo turístico-recreativo

Made available in DSpace on 2014-12-17T14:01:57Z (GMT). No. of bitstreams: 1 AnaCatarinaLR.pdf: 1581949 bytes, checksum: d36f953346d69da5932504873625ff62 (MD5) Previous issue date: 2008-07-03 / ?The aims of this study were: i) assessing the trophic state of the Mendubim reservoir (semi-arid, Rio Grande do Norte, Brazil; 05? 38 99,0 S 36?55 98,0 W) based on chlorophyll-a, total phosphorus and nitrogen concentrations and water transparency; ii) relating the patterns of temporal variation of zooplankton and phytoplankton to the trophic state of the reservoir and iii) investigating the carrying capacity of the reservoir for cage fish farming. The samplingwas done monthly from July 2006 to July 2007 in three stations at the reservoir: next to the dam (barrage), in the central region and in the mouth of the main tributary. The abiotic and biotic variables analyzed were: Secchi depth, volatiles and fixed suspended solids, chlorophyll-a, total phosphorus and nitrogen, TN:TP ratio and mesozooplankton and phytoplankton composition and biomass. The results showed that the reservoir can be considered as mesotrophic with mean concentrations of total nitrogen, phosphorus and chlorophyll-a equal to 1711, 1 ?g.L-1, 30,8 ?g.L-1 and 5,62 ?g.L-1 respectively. The Cyanophyceae class was the most representative in terms of density, with the presence of potentially toxic species such as Microcystis aeruginosa, Planktothrix planctonica, Cylindrospermopsis raciborskii, Aphanizomenon sp. ,Aphanocapsa delicatissima and Pseudanabaena acicularis. Among the zooplankton, the genus Notodiaptomus presented the largest biomass values. Overall, our results show that the light limitation should explain the weak relationship between chlorophyll-a and total phosphorus and nitrogen concentrations. We concluded that the water of Mendubim reservoir is suitable for intensive fish cage aquaculture. Based on the carrying capacity calculations for this reservoir, we found that the maximum sustainable yield of tilapias in cages in the reservoir is 126 ton per year assuming a factor of food conversion of 1.5: 1.0 and a phosphorus content in the fish food of 1% / ?Os objetivos do presente estudo foram: i) avaliar o estado tr?fico do reservat?rio Mendubim (semi-?rido, Rio Grande do Norte, Brasil; 05? 38 99,0 S 36?55 98,0 W ) com base nas concentra??es de clorofila-a, f?sforo e nitrog?nio total, e na transpar?ncia da ?gua; ii) relacionar os padr?es de varia??o temporal da composi??o e biomassa do fitopl?ncton e zoopl?ncton ?s varia??es do estado tr?fico do reservat?rio e iii) investigar a capacidade de suporte do reservat?rio para o desenvolvimento de atividades de piscicultura em tanques-redes. Para tanto, foram realizadas amostragem mensais no per?odo de julho/2006 a julho/2007 em tr?s pontos de coleta, sendo um pr?ximo ? barragem, outro na regi?o central do reservat?rio e o terceiro na desembocadura do principal tribut?rio. As vari?veis bi?ticas e abi?ticas analisadas foram: profundidade e transpar?ncia da coluna d??gua, concentra??es de s?lidos fixos e vol?teis em suspens?o, clorofila-a, nitrog?nio e f?sforo total, raz?o NT:PT, composi??o e biovolume do fitopl?ncton, composi??o e biomassa do mesozoopl?ncton. Os resultados obtidos mostraram que o reservat?rio em estudo pode ser considerado mesotr?fico com concentra??es m?dias de nitrog?nio total, f?sforo total e clorofila-a igual a 1711,1?g l-1 , 30,8 ?g l-1 e 5,62 ?g l-1 respectivamente. A classe Cyanophyceae foi a de maior representatividade em termos quantitativos, com a presen?a de esp?cies potencialmente t?xicas, tais como Microcystis aeruginosa, Planktothrix planctonica, Cylindrospermopsis raciborskii, Aphanizomenon sp., Aphanocapsa delicatissima e Pseudanabaena acicularis. Quanto ? comunidade zooplanct?nica, o g?nero Notodiaptomus, foi o que apresentou maiores valores de biomassa. De um modo geral, os resultados encontrados mostram que a limita??o do crescimento algal por luz, ? uma poss?vel explica??o para as fracas rela??es entre as concentra??es de clorofila-a e de f?sforo e nitrog?nio total no ambiente. Com isso, conclu?mos que as ?guas do reservat?rio Mendubim se encontram apropriadas para a produ??o de pescado num regime intensivo de cultivo em tanques-rede. Com base nos c?lculos da capacidade de suporte do ambiente, verificamos que a produ??o m?xima sustent?vel de til?pias em tanques-rede no reservat?rio ? da ordem de 126 toneladas por ano assumindo um fator de convers?o alimentar de 1,5:1,0 e um conte?do de f?sforo na ra??o de (1,0%)

Submitted by Silas Volpon de Mello (silasmelloo@gmail.com) on 2017-09-18T16:07:04Z No. of bitstreams: 1 Dissertação_Mestrado_deMello_SV.pdf: 6481861 bytes, checksum: bfe9dc719b21419babdfc049e7b8ece6 (MD5) / Approved for entry into archive by Monique Sasaki (sayumi_sasaki@hotmail.com) on 2017-09-19T20:02:38Z (GMT) No. of bitstreams: 1 mello_sv_me_bauru.pdf: 6481861 bytes, checksum: bfe9dc719b21419babdfc049e7b8ece6 (MD5) / Made available in DSpace on 2017-09-19T20:02:38Z (GMT). No. of bitstreams: 1 mello_sv_me_bauru.pdf: 6481861 bytes, checksum: bfe9dc719b21419babdfc049e7b8ece6 (MD5) Previous issue date: 2017-08-18 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este texto apresenta uma pesquisa que propõe um modelo para calcular a Capacidade de Suporte Hídrica (CSH) de regiões urbanizadas visando o Desenvolvimento Sustentável, principal objetivo da humanidade neste século. Utilizando as Análises Estocásticas de Fronteira como ferramenta de modelagem da capacidade de suporte, juntamente com o auxílio de um sistema de informações geográficas (SIG), foi criado um método para calcular a carga antrópica no meio ambiente, ou seja, calcular a intensidade de solicitação ou estresse sobre os recursos naturais que uma dada região exerce sobre seu meio. Um estudo exploratório foi elaborado para verificar a viabilidade desta proposta e posteriormente um modelo específico foi desenvolvido, utilizando variáveis de natureza hídrica, culminando no cálculo da CSH dos municípios e das Unidades de Gerenciamento de Recursos Hídricos (UGRHI) do estado de São Paulo. A disponibilidade hídrica superficial dos objetos de estudo, uma das variáveis hídricas que compõe o modelo, foi calculada de forma aproximada utilizando a nova proposta de regionalização de vazões para o estado de São Paulo, onde foi criado o primeiro banco de dados que agrega informações sobre as vazões Q95, Q7,10 e Qm para todos os municípios do estado.Na sequência, foram simulados três cenários abordando possíveis construções do modelo CSH, dois deles consideraram diferentes formas de agrupamento dos parâmetros e o terceiro obteve as classificações de suporte hídrico para as UGRHIs a partir dos resultados dos municípios. O primeiro cenário apontou 5 UGRHIs e 213 municípios em potencial déficit hídrico e o segundo apontou 6 UGRHIs e 180 municípios nesta mesma situação. O terceiro cenário apontou 7 UGRHIs em potencial déficit no suprimento da demanda de água. A partir dos resultados, foram apontadas regiões que estão sob potencial estresse hídrico, ou seja, que não conseguem fornecer de maneira sustentável a quantidade de água requerida por seus habitantes. Essas regiões podem ser apontadas como as mais vulneráveis em períodos de seca. Assim, pretende-se disponibilizar um modelo para auxiliar na questão da preservação do meio ambiente nas escalas local e regional, considerando-se a disponibilidade de água. / This work presents a research project that proposes a model to calculate the Hydric Carrying Capacity (HCC) of urbanized areas aiming at the Sustainable Development, the main goal of humanity in this century. Using Stochastic Frontier Analysis (SFA) as a modeling technique for carrying capacity along with geographic information systems (GIS), a method to calculate the anthropic load in the environment was created. In other words, the idea was to calculate the stress intensity on the natural resources that a given region produces on its environment. An exploratory study was carried out to verify the feasibility of this proposal and later a specific model was developed. Using hydric variables, the model resulted in the determination of the HCC for the municipalities and for the Water Resources Management Units (UGRHI) of the State of São Paulo. The surface water availability of the objects of study, which is one of the hydric variables that compose the model, was calculated in an approximate way using the new proposal of regionalization of flows for the state of São Paulo. This resulted in the first database that aggregates information about the flows Q95, Q7,10 and Qm for all municipalities in the state. Three scenarios were simulated, discussing possible constructions of the HCC model. Two of them considered different ways of grouping the parameters and the third one obtained the hydric support classifications for the UGRHIs from the results of the municipalities. The first scenario pointed out 5 UGRHIs and 213 municipalities in potential hydric deficit, while the second pointed to 6 UGRHIs and 180 municipalities in this same situation. The third scenario pointed out 7 UGRHIs in potential deficits in supplying water demand. From these results, regions that are under potential water stress were pointed out, that is, regions that cannot provide the amount of water required by their inhabitants in a sustainable way. These regions can be identified as the most vulnerable in periods of drought. Thus, the idea was to provide a model as an aid for the environment preservation at both local and regional scales, considering the availability of water.