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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.
371

Biodiversidade arbórea e estoque de carbono em áreas verdes urbanas: contribuições para a infraestrutura verde de São Paulo, SP. / Tree biodiversity in urban green areas: contributions for the green infrastructure of São Paulo, SP

França, José Ulisses Bezerra de 18 September 2017 (has links)
Submitted by Nadir Basilio (nadirsb@uninove.br) on 2018-05-14T17:14:34Z No. of bitstreams: 1 Jose Ulisses Bezerra de Franca.pdf: 2023273 bytes, checksum: 980a8d350639f6331e8e513ee5874fbe (MD5) / Made available in DSpace on 2018-05-14T17:14:34Z (GMT). No. of bitstreams: 1 Jose Ulisses Bezerra de Franca.pdf: 2023273 bytes, checksum: 980a8d350639f6331e8e513ee5874fbe (MD5) Previous issue date: 2017-09-18 / The disorderly growth of urban centers has brought a series of social and environmental complications, among them the fragmentation of green areas, the loss of biodiversity and the introduction of exotic and invasive species that directly affect the provision of ecosystem services. Such services are fundamental in urban environments, especially in poorly planned cities, such as the city of São Paulo. Thus, it is fundamental to evaluate the urban green spaces, mainly regarding the composition of species and carbon stock. In this sense, the present master's work investigated the floristic composition of public square trees in the city of São Paulo, as well as the carbon stock associated with this vegetation. Thirteen public squares were selected in four Regional Prefectures belonging to two zones, East and West. All trees with diameter at breast height (DBH) greater than 5 cm were selected and identified by means of collection of the preferentially flowering branch and the DAP and height were measured. They were inventoried 1510 individuals, belonging to 29 botanical families and 91 different species. Of this total, 56.4% were exotic species, 45.3% native and 0.3% undetermined. The most representative botanical family of this study was Fabaceae and in relation to functional groups, 87% of the individuals were trees and only 13% were palm trees. The square with the greatest abundance of species was José Ória and Carlos januário and in general, a positive correlation was observed between the size of the area of the square and abundance of species, however, the size of the area was not correlated (alpha <95%) with other attributes And ecological ecological indexes. However, floristic similarity was found in squares of the same size, with emphasis on the taxonomic family level. It was observed that all the individuals stored a total of 464.9 tons of C, being that this value is equivalent to 65.2 Ton C. ha-1. The exotic species had great contribution in the storage of the element in their respective trunks. Thus, the urban green areas of the present study show a floristic pattern that follows some tendencies of urbanized areas outside the country, due to the scarcity of studies of this nature in Brazil, and they store a reasonable amount of C per hectare of area Sampled, thus providing a great environmental service for the city of São Paulo. Based on these possible results, it is hoped to contribute to proposals and management plans for urban afforestation in the city of São Paulo, especially with regard to the creation of ecological corridors for the transit of urban fauna. / O crescimento desordenado dos centros urbanos tem trazido uma série de complicações de ordem social e ambiental, dentre as quais se destacam a fragmentação das áreas verdes, a perda da biodiversidade e a introdução de espécies exóticas e invasoras que afetam diretamente a prestação de serviços ecossistêmicos. Tais serviços são fundamentais em ambientes urbanos, principalmente em cidades mal planejadas, como é o caso da cidade de São Paulo. Assim, torna-se fundamental a avaliação dos espaços verdes urbanos, principalmente no que diz respeito a composição de espécies e estoque de carbono. Neste sentido, o presente trabalho de mestrado investigou a composição florística de árvores de praças públicas da cidade de São Paulo, bem como o estoque de carbono associado a esta vegetação. Treze praças públicas foram selecionadas em quatro Prefeituras Regionais pertencentes a duas zonas, a Leste e a Oeste. Todas as árvores com diâmetro a altura do peito (DAP) maior do que 5 cm foram selecionadas e identificadas por meio de coleta do ramo preferencialmente florido e tiveram o DAP e a altura mensuradas. Foram inventariados 1510 indivíduos, pertencendo a 29 famílias botânicas e 91 espécies diferentes. Deste total, 56,4% eram espécies exóticas, 45,3% nativas e 0,3% indeterminadas. A famílias botânicas mais representativa deste estudo foi Fabaceae e em relação aos grupos funcionais 87% dos indivíduos eram árvores e apenas 13% palmeiras. A praça com maior abundância de espécies foi José Ória e Carlos Januário e em geral, notou-se correlação positiva entre o tamanho da área da praça e abundância de espécies, porém, o tamanho da área não foi correlacionado (alfa<95%) com outros atributos e índices ecológicos. No entanto, encontrou-se similaridade florística em praças de mesmo tamanho, com destaque para o nível taxonômico de família. Observou-se que todos os indivíduos estocam um total de 464,9 toneladas de C, sendo que este valor equivale a 65,2 Ton C. ha-1. As espécies exóticas tiveram grande contribuição no armazenamento do elemento em seus respectivos troncos. Com isso, nota-se que as áreas verdes urbanas do presente estudo apresentam um padrão florístico que segue algumas tendências de áreas urbanizadas fora do país, dado a escasses de estudos desta natureza no Brasil, e estocam uma quantidade razoável de C por hectare de área amostrada, prestando assim um ótimo serviço ambiental para a cidade de São Paulo. A partir destes possíveis resultados, espera-se contribuir para propostas e planos de manejo da arborização urbana da cidade de São Paulo, principalmente no que tange a criação de corredores ecológicos para o trânsito da fauna urbana.
372

Vnímání ekosystémových služeb v městském prostředí / Perception of ecosystem services in an urban environment

Nožková, Markéta January 2017 (has links)
This thesis deals with city ecosystem services and how are these services perceived by the visitors of the city nature areas. Specifically, the thesis deals with ecosystem services provided in the city Carlsbad. As the city Carlsbad is the spa city, great deal of visitors of the city nature areas are tourists and that is why are included in the research both city residents and also temporary visitors of the city. From the point of view of the usual division of the ecosystem services, as it was defined by Millennium ecosystem assessment (provisioning services, regulating services, cultural and supporting services), this thesis focuses mainly on the cultural and supporting ecosystem services, because this spectrum of services is presented in the greatest measure in cities in general and these services are overall the most appreciated in the urban areas. As a methodology was chosen a quantitative research, which was conducted by standardized questionnaire consisting of 19 questions. The survey was carried out in electronical form and it took part from November to December 2016. In total, 206 questionnaires were collected. Through the survey was found out, that people are aware of the services provided by nature environment in city as well as the respondents agree, that city nature areas influence the...
373

Urbana ekosystemtjänster : En evidensbaserad genomgång av urbana ekosystemtjänster och implementering i Slakthusområdet

Berkevall, Catrine, Cerna, Jessica January 2021 (has links)
More than 3,5 billion people currently lives in cities, a number that is expected to increase further. The densification of cities makes it increasingly difficult for people to access natural areas, at the same time as biological diversity is threatened. In this study, we highlight the importance of urban ecosystem services through social and ecological aspects. This study presents a summary of different evidence-based solutions that contribute with urban ecosystem services. It moreover uses a case of urban development in Slakthusområdet (Meatpacking district), Stockholm, in order to describe contemporary processes that integrate solutions that contribute to urban ecosystem services. The results show that there are challenges in implementing these solutions with respect to political, economic, and market factors. The study thereby identifies how examining authorities and policy demands on a green factor tool enable ecosystem service solutions. By studying ecosystem services as part of a social-ecological system, this study ultimately contributes with knowledge on the execution of multifunctional solutions, which are becoming ever more important with the densification of cities around the globe. / Över 3,5 miljarder människor är idag bosatta i städer, och i framtiden förväntas den siffran öka. Förtätningen av städer försvårar människornas tillgång till naturområden samtidigt som den biologiska mångfalden hotas. I den här studien understryker vi de urbana ekosystemtjänsternas roll utifrån sociala och ekologiska aspekter. Härigenom presenterar den här studien en sammanställning över olika evidensbaserade gröna lösningar som bidrar med urbana ekosystemtjänster. Vidare tar den här studien avstamp i stadsutvecklingen av Slakthusområdet i Stockholm i syfte om att studera samtida processer kopplat till implementeringen av lösningar som bidrar med ekosystemtjänster. Resultatet pekar på att det finns utmaningar för implementering av lösningar som bidrar med ekosystemtjänster kopplade till ekonomi, politik och marknadslösningar. Därigenom identifieras kravet för grönytefaktor (GYF) och de granskande myndigheternas arbete med möjligheter för implementering av gröna lösningar. Genom att studera ekosystemtjänster som en del av ett social-ekologiska system bidrar den här studien med kunskap om tillämpningen av mångfunktionella lösningar, vilka blir allt viktigare i och med den ökade förtätningen av städer.
374

Trees, Temples and Technology : Social values and ecosystem services in a changing  urban context, the case of Bangalore

Schewenius, Maria January 2011 (has links)
The pressure on natural resources in urban areas increases as cities grow in size and populations; however, informal institutions as norms and values by ‘common people’ can play a major role for protection of urban greens.  As the city of Bangalore, India, rapidly grows in size and population, its green areas are disappearing. In rural parts of India, local people’s notion of certain ecosystems as sacred has rendered the ecosystems protection and contributed to sustenance of ecosystem services’ generation. The aim of this paper is to explore the potential of stewardship of urban greens in a changing social context, focusing on religious beliefs and practices surrounding trees in Bangalore. It focuses on the cultural dimension of ecosystem services and connects previous research on sacred groves in rural areas with research on stewardship of urban greens. Methods include interview surveys with visitors to five focus sites of religious significance representing the city's four major religions; semi-structured interviews with key informants; and observations. Results show that on the Hindu sites -the study’s main focus- in the city, a range of trees were sacred themselves and revered through a set of practices. On the other sites, trees were rather an incorporated part of the land areas with religious significance. On all sites a set of cultural services was appreciated as generated by trees. Furthermore, visitors had a strong stake in the trees but the experienced levels of capacity to secure the trees’ protection differed between the sites. The study concludes that ‘common people’ are crucial stakeholders for ecosystem stewardship that ensures protection of the urban greens in Bangalore. The different religions in the city provide a multi-faceted protection of different types of urban greens. The level of protection is the outcome of a complex web of community values and norms, where sacredness is one included element.
375

Vliv změny využití krajiny na dostupnost ekosystémových služeb v Česku / Land Use Change Impacts on Ecosystem Services Availability in Czechia

Frélichová, Jana January 2014 (has links)
No description available.
376

Smallholder vanilla agroforestry in Madagascar: biodiversity, ecosystem services and yields in a land-use context

Martin, Dominic A. Dr. 11 August 2021 (has links)
No description available.
377

Biodiversity-Ecosystem Services Relationships within the Biosphere Integrity Planetary Boundary

Singh, Satnarain January 2020 (has links)
The biosphere integrity boundary of the Planetary Boundaries Framework seeks to highlight biodiversity loss and its effect on humanity's 'safe operating space'. Biodiversity plays a critical role in sustaining ecosystem function and by extension, the ecosystem services on which human wellbeing depends. As currently conceptualized, biodiversity and the provisioning and regulating ecosystem services with which it is associated, is not adequately captured in the boundary. Literature searches for data-synthesis were carried out to identify and assess the balance of evidence for the relationship between biodiversity and ecosystem services. The change in global ecosystem service trends over time were assessed along with the interactions between ecosystem services. Twelve provisioning and 9 regulating ecosystem services associated with biodiversity were identified in the literature. Biocontrol and carbon sequestration were the most studied services. The Fischer exact test showed that there was a significant difference between the extent to which provisioning versus regulating ecosystem services are studied. Mann-Whitney U tests showed non-significant relationships between provisioning services and regulating services for trend and effect size data. All provisioning services showed increasing trends over time. The results for regulating services were mixed. Of the 115 ecosystem service interactions assessed, 66 were trade-offs and 49 were synergies. Crop yield and climate-related ESS (carbon sequestration and carbon storage) represented almost one-third of these interactions (n = 22) while crop yield and erosion control represented over a quarter (n = 19). These interactions alone accounted for 36% of the total interactions. This paper provides an initial database which could be refined and expanded. It also demonstrates a comprehensive approach to assessing biodiversity ecosystem service relationships, providing a tangible approach to assessing a safe operating space for humanity. Further, it provides a platform for future research on biodiversity-ecosystem services human well-being links, which will provide better insights to policymakers, managers and practitioners. / <p>The presentation was done via Zoom during Covid 19 when Stockholm University was closed. </p>
378

Identifying Optimal Locations for Urban Green Infrastructure to Reduce Health Inequalities: A GIS-Based Approach to combine Health, Land-use, Socioeconomics and Ecosystem Services in Stockholm

Rostang, Olivier January 2020 (has links)
Cities are growing at unprecedented rates and are expected to be home to 70% of the world’s population in 2050. In this process, they face challenges such as densification, rapid population growth and loss of land and ecosystem services. Cities also have to remain livable and accessible to all. In 2014, the Swedish Public Health Agency declared that it would aim to close all avoidable health inequalities within one generation. In order to reach these objectives while also complying with the Sustainable Development Goals, urban green infrastructure (UGI) has been increasingly viewed as a powerful instrument that cities can utilize to help them meet their sustainability and human health targets. As nature-based solutions, UGI can greatly contribute to building resilience in urban areas by providing a number of ecosystem services. Simultaneously, UGI have also been shown to possess equigenic functions – the capacity to support the health of the least advantaged population groups equally or more so than the most privileged. This study has therefore aimed to operationalize a methodology to help identify optimal locations for developing and managing UGI in Stockholm with the aim of prioritizing health and minimizing impacts on existing ecosystems. This was done by drawing on 3 spatial datasets (land-cover, health and healthcare consumption, socioeconomics) and combining them using a GIS. The resulting maps are made for individual as well as aggregated health indicators. They display multiple optimal location clusters that were often located in the outer parts of the city, notably in the north-western and south-eastern boroughs. The inner-city however, showed little need for equigenic UGI improvements. The results and the implications of this methodology are discussed in relation to several aspects of UGI, including quality, quantity and accessibility, gentrification and UGI’s role in the smart city. Suggestions for future research building on this methodology are also provided.
379

Modeling Coastal Vulnerability for Insight into Mangrove and Coral Reef Conservation Efforts in Cuba

Gomez, Maria 01 August 2018 (has links)
Cuba’s expansive coral reefs and mangrove habitats provide a variety of ecosystem services to coastal communities including nursery grounds for fisheries, shoreline stability, and storm and flood protection. While Cuba’s coastal habitats are some of the most preserved in the Caribbean, they are under increasing threat of degradation from the impacts of climate change, increased tourism, and coastal development. With the goal of sustainable development, Cubans need to assess the storm and flood protection benefits these coastal habitats provide, and integrate this information into future expansion and management plans within the National Protected Areas System (SNAP). Using the open source software, Integrated Valuation on Ecosystem Services and Tradeoffs (InVEST), a national-scale coastal vulnerability model was developed to provide quantitative estimates of coastal exposure and the protective role of coastal habitats during storm events. This model integrates storm information with bathymetry and coastline geomorphology, coupled with coastal habitat data to estimate the influence of these habitats in reducing vulnerability to storms and flooding. By combining these results with human population data, the model identifies where coastal communities are most vulnerable to wave energy and storm surge, and where coral reefs and mangroves provide the most protection by reducing impacts to these communities. We classify these regions as areas of conservation priority. We observed that fifty percent of the areas identified as areas of conservation priority lack any form of environmental protection. We recommend including these key habitats within the National System of Protected Areas. This will permit decision makers to more effectively concentrate restoration and conservation efforts in areas where people and natural resources will experience greater benefit from valuable ecological services.
380

Grönska i centrum : -en fallstudie i Örnsköldsvik

Johansson, Johanna January 2022 (has links)
Today almost half the world’s population live in cities, and urbanization rates continue to increase. This puts a lot of strain on green areas in urban environments where sustainability can often be a problem. To be able to provide green areas in growing cities, that becomes more densely populated, city planners need to develop new strategies when constructing new green areas and improving already existing ones. Green areas are important since they provide important ecosystem services in urban environments, for example reducing air pollution. This study evaluates the potential to develop and improve green areas in downtown Örnsköldsvik. First by conducting interviews with city planners, secondly by conducting a field study of Viktoriaesplanaden, and thirdly through a survey. The results of this study indicates that green areas needs to be allowed to take more space in cities, especially near street-related infrastructure. More specifically already green areas needs to be developed and new green areas needs to be considered early on in the planning process when a city grows and becomes more densely populated. One key factor in this process is to educate planners and builders regarding the value of green areas in the modern urban environment.

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