A comprehensive hydrological study of large watersheds in Africa e.g. the Congo basin and the Nile basin has not been vigorously pursued for various reasons. One of the major reasons is the lack of adequate modeling tools that would not be very demanding in terms of input data needs and yet inclusive enough to cover such wide extents (over 3 million square kilometers for the Congo basin). Using a coupled run of the Community Atmospheric model (CAM3) and Community Land Model (CLM3) components of the Community Climate System of Models (CCSM), this study looks into the spatial and temporal variation of precipitation and river runoff in the Congo basin in the light of increasing trends in deforestation of the tropical forests. The effect of deforestation on precipitation and runoff is investigated by changing the land cover-type from the current configuration of broadleaf evergreen/deciduous, non-Artic grass and corn to a mostly grass type of vegetation. Discharge simulation for the river Congo is centered at the point of entrance to the Atlantic Ocean. Although the CLM3 does not presently simulate the observed river runoff to within at least one standard deviation it gives an opportunity to iteratively improve on the land surface parameterization with a possibility of future accurate prediction of mean monthly river runoffs under varying climate scenarios and land use practices. When forced with the National Center for Environment and Prediction (NCEP) re-analysis data the CLM3 runoff simulation results are relatively more stable and much closer to the observed. An improved CLM3 when coupled to CAM3 or other Global Climate Models is definitely a better tool for investigative studies on the regional hydrological cycle in comparison to the traditional methods. There was a slight reduction in rainfall in the first experiment which mimicked a severe form of deforestation and a slight increase in rainfall following low level of deforestation. These changes in rainfall were however statistically insignificant when compared to the control simulation. There was notable heterogeneity in the spatial distribution of the changes in rainfall following deforestation.

Forest-cover in the tropics is changing rapidly due to indiscriminate removal of timber from many localities. The main focus of the study is to develop an operational tool for monitoring biomass and carbon pool of tropical forest ecosystems. The method was applied to a test site of Bangladesh. The research used Landsat ETM+, Landsat TM and IRS pan images of 2001, 1992 and 1999 respectively. Geometrically corrected Landsat ETM+ imagery was obtained from USGS and adjusted to the field using GPS. Historical images were corrected using image-to-image registration. Atmospheric correction was done by modified dark object subtraction method. Stratified sampling design based on the remote sensing image was applied for assessing the above-ground biomass and carbon content of the study area. Field sampling was done during 2002-2003. Dbh and height of all the trees inside the sample plots were measured. Field measurement was finally converted to carbon content using allometric relations. Three different methods: stratification, regression and k-nearest neighbors were tested for combining remote sensing image information and field-based terrestrial carbon pool. Additional field sampling was conducted during 2003-2004 for testing the accuracy. Finally regression method was selected. The amount of carbon released and sequestrated from the ecosystem was estimated. The application of the developed method would be quite useful for understating the terrestrial carbon dynamics and global climate change.

Le but principal de ce travail a été de reprendre les transformations du concept de la nature au sein de la philosophie occidentale et de mettre en relation l'histoire du droit, à partir des catégories analytiques telles que le pouvoir et la domination qui tracent un chemin particulier au déroulement de la crise environnementale également mise en question aujourd'hui. L'objectif était de discuter le rôle du Droit en tant que science et comme un instrument de pouvoir qui a historiquement conduit seulement des tranches de la société à un statut de position dominante, ces petits groupes corroborent à la crise environnementale. En ce sens, il est inévitable de parler de l'Amazonie, en particulier du Pará, un État où la déforestation et les conflits atteignent des records. Le reflet de toutes ces transformations est vécu au quotidien dans cette région où des points de vue opposés sur la nature cohabitent conflictuellement et alors, c’est dans ce champ de forces que la classe dominante montre son pouvoir et détermine l'avenir de ce lieu. Nous présentons une brève analyse de la façon dont les juristes se manifestent dans les processus liés à des grands projets parmi la région ouest du Pará pour illustrer la vision et les concepts de la nature tirés par ces importants acteurs. Mais qu’est-ce que qui pourrait être vraiment différent dans cet ensemble qui se répète à travers le monde? A la fin, nous présentons les dernières discussions sur l'autonomisation sociale des agents qui résistent à la domination séculaire. La nature comme sujet de droit est non seulement une pensée tirée d’une dimension théorique biocentrique, mais aussi elle représente un mouvement de décolonisation de la pensée et des constructions européanisées / occidentales, ainsi qu'une construction de l'autonomisation des agents qui donne l'identité à ce lieu, l'Amazonie. / The main effort of the rescue work was the transformation of the concept of nature in Western philosophy and relate the history of law, analytic categories such as power and domination of drawing a particular way the crisis process environmental as discussed today. The aim was to discuss the role of law as a science and as an instrument of power that historically only led party on a dominant status and a mastery of the crisis experienced and propagated today. In this sense, it is inevitable question of the Amazon, in particular the state of Pará with record of deforestation and conflict. The reflection of all the transformations are experienced daily in the region where the nature diametrically opposed visions of the life of a conflict and therefore within the force field agents to show their power and dictate the future of this location. A brief analysis of how lawyers are manifested in processes related to large projects in the western region of Para to illustrate the vision and the nature of the concepts learned by these important agents. But what could be really different in this whole journey that repeats throughout the world? At the end, we present the latest discussions on the social empowerment of officers who resist the secular domination. Nature as a subject of rights is not only a thought or a biocentric theoretical aspect, is a decolonization movement of thought and theoretical constructs Europeanized / Western and a building accountability agents that give identity to place, the Amazon. / O principal esforço desde trabalho foi resgatar as transformações do conceito de natureza dentro da filosofia ocidental e relacionar a história do Direito, a partir de categorias analíticas como poder e dominação que desenham um caminho particular ao processo de crise ambiental tão discutido na atualidade. O objetivo era discutir o papel do Direito enquanto ciência e enquanto instrumento de poder que conduziu historicamente apenas parcelas das sociedades ao status de dominante e que exerce grande controle da crise hoje vivenciada e propagada. Neste sentido, é inexorável falar da Amazônia, especialmente do Pará, Estado com recordes de desmatamento e conflitos. O reflexo de todas as transformações são vivenciadas dia-a-dia na região onde visões de natureza diametralmente opostas convivem conflituosamente e, portanto, será dentro do campo de forças que os agentes demonstram seu poder e ditam o futuro deste lugar. Apresentamos uma breve analise de como os juristas manifestam-se dentro dos processos relacionados aos grandes projetos na região oeste do Pará como ilustração da visão e dos conceitos de natureza apreendidos por esses importantes agentes. Mas o que poderia ser realmente diferente em todo esse percurso que se repete em todo mundo? Ao final, apresentamos as últimas discussões quanto ao empoderamento social de agentes que resistem à dominação secular. A natureza enquanto sujeito de Direitos não é apenas um pensamento ou uma vertente teórica biocêntrica, representa um movimento de descolonização do pensamento e das construções teóricas europeizadas/ocidentais, como também uma construção de empoderamento dos agentes que dão identidade ao lugar, a Amazônia.

The people of Pikoli in the Peddie district of the Eastern Cape are mostly unemployed and earn most of their income from old-age allowances. The place is remote and 'modern' amenities such as paraffin and petroleum gas are expensive. Electricity and transport are unavailable. There is heavy reliance on woody plants for fuel and for materials for construction and fencing and to some extent medicinal and ritual uses. Indigenous trees in this rural area are threatened by over-utilisation and the absence of clear government management policies. The over-utilisation of these resources is leading to deforestation. It was proposed at the beginning of this study that people who harvest trees cause similar results to the piosphere effect caused by the herbivores on the rangeland. Ecological-economic analysis was performed to find a common ground between the people's income and needs so that effective sustainable management strategies can be developed. A combination of semi-structured interviews, direct observations and ecological surveys were used to gather information about: Tree species used, and for what purpose in Pikoli; Individual tree species preference by inhabitants; Change in tree density in response to changes in utilisation intensity at varying distances away from the village; The local direct use benefits inhabitants derive from utilising indigenous tree resources. The study showed that the people of Pikoli use a variety of 23 indigenous trees and that they have marked preferences regarding the tree species they use for fuelwood and construction purposes. Although Ptaeroxylon obliquum is a highly preferred species for fuelwood and construction, its popularity can also be linked to its high relative abundance in this area. Other species such Maytenus undata and Pappea capensis are also highly preferred although they are harvested at much greater distances from thecentre of the village. Change in individual tree density in response to changes in utilisation intensity at varying distances away from the village showed clearly that a piosphere effect also applies to human harvesting. The average number of individual trees closer (1 200 m) to the village centre was 2 trees per 100 m², and their numbers increase to approximately 35 trees per 100 m² at a distance of about 3 000 m from the village centre. The study reports on the direct use benefits derived by the people of Pikoli from harvesting tree resources. The average total net value of trees harvested for fuelwood was R4089.09 (US$ 359.01) per household per annum. The value of tree resources harvested represents a large percentage of average households' annual income. Therefore, the economic benefits households derive from utilising tree resources are high. Indigenous tree resource use in this rural village seems to be unsustainable and the inhabitants seem to be aware of it. However, they have few alternatives. Their economic conditions do not allow them to afford alternative resources available in the formal market.

Forests in developing countries have the potential to contribute to global efforts to mitigate climate change, promote biodiversity and support the livelihoods of rural, local people. Approximately one-fourth of such forests are under the control of local communities, which primarily manage forests for subsistence and to meet their livelihood needs. The trend of bottom-up community control is increasing through the adoption of decentralization reforms over the last 40 years. In contrast, the United Nations has introduced the top-down program, Reducing Emissions from Deforestation and Forest Degradation (REDD+) for the conservation and enhancement of forest carbon and the sustainable management of forest in developing countries. REDD+ incentivizes forest-managing communities to sequester carbon and reduce emissions. REDD+ has created hope for managing forests to mitigate climate change and has created fear that the new initiative may not be effective and may not ensure continuing forest-managing community benefits. However, little research has been conducted to answer these concerns. By taking nationally representative data from Nepalese community-managed forests (“forest commons"), I bring insights into whether and how these forests can contribute to REDD+ initiatives, particularly as they relate to carbon sequestration, biodiversity, equity in benefit sharing and collective action. My results indicated the highly variable carbon and biodiversity in the forest plots across the country, depicting the availability of space for additional growth in carbon storage and biodiversity conservation. My results also reflect the complex and varied relationships of carbon with different indices of biodiversity at the national level, across geographic and topographic regions, and in forests with varying canopy covers. Weak positive relationships between carbon sequestration and biodiversity conservation indicate the possibility of synergies between carbon-forestry and biodiversity conservation. I also found that the formal community forestry program (CFP) has clearly positive impacts on biodiversity conservation and household-level equity in benefit sharing and a negative impact on carbon sequestration at the national level. However, disaggregated results of impacts of CFP on biodiversity, carbon and equity across geography, topography, forest quality and social groups display mixed results i.e., either positive or negative or neutral. I also identified that different drivers of collective action have different (i.e., positive, neutral, and negative) associations with carbon sequestration, which either supports or challenges established knowledge. In aggregate, my research indicates the potential of contribution by forest commons, and specially the CFP, to global environmental initiatives such as REDD+. It suggests that targeted, dedicated policies and programs to increase carbon sequestration, biodiversity conservation and foster equity and collective actions are critical. In addition, my results also contribute to the growing literature on socio-ecological implications of forest commons that demonstrated the need of interdisciplinary research to understand human-nature relationships in the changing context.

Forest-cover in the tropics is changing rapidly due to indiscriminate removal of timber from many localities. The main focus of the study is to develop an operational tool for monitoring biomass and carbon pool of tropical forest ecosystems. The method was applied to a test site of Bangladesh. The research used Landsat ETM+, Landsat TM and IRS pan images of 2001, 1992 and 1999 respectively. Geometrically corrected Landsat ETM+ imagery was obtained from USGS and adjusted to the field using GPS. Historical images were corrected using image-to-image registration. Atmospheric correction was done by modified dark object subtraction method. Stratified sampling design based on the remote sensing image was applied for assessing the above-ground biomass and carbon content of the study area. Field sampling was done during 2002-2003. Dbh and height of all the trees inside the sample plots were measured. Field measurement was finally converted to carbon content using allometric relations. Three different methods: stratification, regression and k-nearest neighbors were tested for combining remote sensing image information and field-based terrestrial carbon pool. Additional field sampling was conducted during 2003-2004 for testing the accuracy. Finally regression method was selected. The amount of carbon released and sequestrated from the ecosystem was estimated. The application of the developed method would be quite useful for understating the terrestrial carbon dynamics and global climate change.

Indigenous Peoples and REDD+: A Critical Perspective / Indigenous Peoples' Biocultural Climate Change Assessment Initiative (IPCCA) / November 2014 / Public Political Ecology Lab / Executive Summary: REDD+ stands for Reducing Emissions from Deforestation and forest Degradation in developing countries (REDD) and includes conservation, sustainable forest management and the enhancement of carbon stocks (the +). An international initiative negotiated under the United Nations Framework Convention on Climate Change (UNFCCC), REDD+ has been proposed as a central strategy for mitigating climate change in forests. While advocates highlight the cost effectiveness and social and ecological co-benefits that can be generated through REDD+, many indigenous and forest dependent groups have expressed concerns about the potential effects of projects on their access to land and resources. This report identifies key issues facing indigenous and forest-dependent communities with respect to REDD, and is based on existing academic literature and more current reports by NGOs and indigenous organizations. We first lay out a brief history of REDD+, interrogate its key assumptions, and discuss major issues of concern. We then discuss REDD+ as it relates to indigenous peoples and forest-dependent communities. This is followed by a series of case studies of developing countries participating in REDD+. We conclude with a discussion of the principal elements for an alternative vision for REDD+ that takes seriously the rights of indigenous peoples. / / Resumen Ejecutivo REDD+ es acrónimo para Reducing Emissions from Deforestation and forest Degradation (Reducir las Emisiones por Deforestación y Degradación de bosques) (en países en desarrollo). Incluye acciones para la conservación, el manejo sustentable de bosques y el aumento en los suministros de carbono (el +). Como una iniciativa internacional negociada bajo el United Nations Framework Convention on Climate Change (UNFCCC) (Convención Marco de Naciones Unidas sobre el Cambio Climático), REDD+ ha sido propuesto como una estrategia principal para mitigar el cambio climático en bosques. Aunque sus defensores enfatizan la eficacia financiera y los co-beneficios sociales y ecológicos que se pueden generar a través del REDD+, muchos grupos indígenas y de gente quien depende de bosques para su sustento tienen preocupaciones acerca de los posibles efectos de los proyectos sobre el acceso a la tierra y los recursos forestales. Este informe identifica los problemas principales que enfrentan las comunidades indígenas y gente dependiente de bosques con REDD. Está basado en la literatura académica existente y otros reportes actuales escritos por organizaciones no gubernamentales (ONGs) y organizaciones indígenas. Primero proveeremos una historia breve de REDD+, evaluaremos las suposiciones principales y discutiremos los problemas de mayor preocupación. Luego describiremos la relación entre REDD+ y los pueblos indígenas y comunidades dependientes de bosques. Esto será seguido por una colección de casos de estudio en los países en desarrollo que participan en REDD+. Concluiremos con una discusión de los elementos principales para una visión alternativa de REDD+ que toma en cuenta los derechos de los pueblos indígenas.

Thesis (MSc)--Stellenbosch University, 2015. / ENGLISH ABSTRACT: Forests in South Africa have had a long history of human utilization and disturbance, and are under threat from a variety of anthropogenic land use changes. Foremost of these are deforestation and forest degradation, impacting the species native to these forests. The aims of this study were to determine changes in the distribution of forest dependent bird species according to the South African Bird Atlas Project; to relate these changes to changes in land-use; to identify links between these changes; to determine the extent, location and causes of the decline of each forest dependent bird species; and to identify current risks to forest dependent bird species in South Africa. Range data on 57 forest dependent bird species from SABAP1 (1987-1992) and SABAP2 (2007-present) were analyzed. Of these, 28 species were found to have declining ranges. Thirty sites across South Africa were identified as being most at risk, with all having experienced a loss of more than 10 of the 57 forest dependent bird species between SABAP1 and SABAP2. The range change data of the 28 species with decreasing ranges were correlated with data on changes in land cover over the same time period to infer relationships between changes in land use and change in bird ranges. Occupancy modelling was done to determine which land cover types affect extinction and initial presence. Individual species characteristics were analyzed to determine links between characteristics and response to land use change. A pan-European trait-based risk assessment framework was applied to all 57 species to identify habitats and species most at risk, as well as the most important threats to species persistence. Results showed that natural vegetation decreased in 67% of sites, while plantations and cultivation increased in 50% of sites. Occupancy modelling showed extinction likelihood to increase with plantations in some species, while plantations mitigated extinction likelihood in other species. Urbanization and cultivation likewise mitigated extinction likelihood in some species. Natural vegetation was replaced by cultivation, while cultivation was replaced by urbanization. The number of species lost increased with a loss of natural vegetation. Twenty two of the thirty sites experienced deforestation of indigenous forests between 2000 and 2013/2014; changes in natural vegetation in these sites can be attributed primarily to deforestation, and a loss of plantations. While most at-risk sites were in the Eastern Cape, there was no geographic grouping of species loss or of land use change. Most species lost were birds of prey or insectivores, and species characteristics and habitat preferences determined the sites from which they were lost. The Cape parrot (Poicephalus robustus), rufous-chested sparrowhawk (Accipiter rufiventris) and the migratory Eurasian golden oriole (Oriolus oriolus) suffered the largest declines in range size and are thought to be most at risk. Montane forests were found to be more at risk than other forest types. The major risks facing montane forests were increased abundance of small predators, increased fire suppression, increased soil management, removal of deadwood and reduced diversity of tree species. These threats are all products of plantation forestry and local harvesting. Nesting risk was higher than foraging risk for all species, indicating that nesting habitat should be better preserved. Half of South Africa’s forest dependent bird species have declining ranges, with the loss of these species most prominent in the Eastern Cape. Natural vegetation loss, comprising mostly recent deforestation; increased cultivation and urbanization; and changes in plantation cover are thought to be the main factors determining these declines. Montane forests in particular should be better protected to preserve forest dependent species, and the negative effects of plantation forestry and local harvesting should be mitigated. / AFRIKAANSE OPSOMMING: Suid-Afrika het ‘n lang geskiedenis van woude wat deur mense gebruik, asook vernietig word. Woude word bedreig deur verskeie menslike grondgebruike en veranderinge. Die mees vooraanstaande van die bedreigings is ontbossing en woud verdunning, wat ‘n invloed het op inheemse spesies in die woude. Die doelwitte van hierdie studie was om veranderinge in die verspreiding van bos-afhanklike voëlspesies vas te stel volgens die Suid Afrikaanse Voël Atlas Projek; om hierdie veranderinge te verband met veranderinge in grondgebruik; om verbande tussen hierdie veranderinge te identifiseer; om die mate, die plek en die oorsake van die agteruitgang van elke bos-afhanklike voëlspesies te bepaal; en om huidige risiko's aan die bos afhanklik voëlspesies in Suid-Afrika te identifiseer. Trefwydte inligting oor 57 woud afhanklike voëlspesies van SABAP1 (1987-1992) en SABAP2 (2007-nou) was geanaliseer. Daar was gevind dat vanuit die spesies, het 28 ‘n afneming in trefwydte ervaar. Dertig terreine in Suid-Afrika was uitgeken as dié met die hoogste risiko, met ‘n verlies van meer as 10 van die 57 woud afhanklike voëlspesies tussen SABAP1 en SABAP2. Die trefwydte inligting van die 28 spesies met ‘n afnemende trefwydte was gekorreleer met inligting oor veranderinge in grond bedekking oor dieselfde tydperk om verhoudings tussen veranderinge in grond gebruik en veranderinge in voël trefwydtes aftelei. Besetting modellering was gedoen om te bepaal watter tipes grond bedekking beinvloed uitwissing en aanvanklike teenwoordigheid. Kenmerke van individuele spesies is ontleed om verbande tussen kenmerke en reaksie op verandering in grondgebruik te bepaal. ‘n Pan-Europese eienskap gebaseerde risiko-analise raamwerk is toegepas op die 57 spesies om die spesies en habitatte met die grootse risiko te identifiseer, asook die belangrikste bedreigings vir spesies-volharding. Die resultate het gewys dat natuurlike plantegroei het verminder in 67% van terreine, terwyl plantasie en verbouing vermeerder het in 50% van terreine. Besetting-modellering het gewys dat waarskynlikheid van uitwissing vermeerder met plantasies in sommige spesies, terwyl plantasies die waarskynlikheid van uitwissing verminder het in ander spesies. Verstedeliking en verbouing het ook die waarskynlikheid van uitwissing verminder in sommige spesies. Natuurlike plantegroei was vervang deur verbouing, terwyl verbouing vervang is deur verstedeliking. Die aantal spesies verlies het vermeerder met die vermindering van natuurlike plantegroei. Twee en twintig van die dertig terreine het ontbossing van inheemse woude ervaar tussen 2000 en 2013/2014. Veranderinge in natuurlike plantegroei in die terreine is meestal as gevolg van ontbossing, en ‘n vermindering van plantasies. Terwyl meeste van die hoë risiko terreine in die Oos-Kaap was, was daar geen geografiese groepering van spesies vermindering of grondgebruik veranderinge nie. Meeste spesies wat vernietig is was roofvoëls of insectivore, en spesies kenmerke en habitat voorkeure het die terreine bepaal waaruit hulle verloor is. Die grootpapegaai (Poicephalus robustus), rooiborssperwer (Accipiter rufiventris) en die trekvoël Europese wielewaal (Oriolus oriolus) het die grootste vermindering in trefwydte grootte ervaar, en is vermoedelik die grootste risiko. Bergwoude was gevind om meer in gevaar te wees as ander woud tipes. Die grootste risikos wat bergwoude beïnvloed het was ‘n toenemende hoeveelheid klein roofdiere, verhoogde vuur onderdrukking, verhoogde grondbestuur, verwydering van dooie hout, en verlaagde diversiteit van boomspesies. Hierdie bedreigings is almal as gevolg van plantasie bosbou en plaaslike oes. Nes-risiko was hoër as kos soek risiko vir alle spesies, wat aandui dat nes-habitat beter bewaar moet word. Die helfte van Suid-Afrika se woud-afhanklike-voëlspesies het dalende trefwydtes, met die verlies van hierdie spesies mees opvallend in die Oos-Kaap. Die verlies van natuurlike plantegroei, as gevolg van onlangse ontbossing; verhoogde verbouing en verstedeliking; en veranderinge in plantasie bedekking is vermoedelik die hooffaktore wat die vermindering van voëlspesies veroorsaak. Veral bergwoude moet beter beskerm word om woud-afhanklike-voëlspesies te bewaar en die negatiewe invloede van plantasiebosbou en plaaslike oes te verminder.

published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

published_or_final_version / Urban Planning / Master / Master of Science in Urban Planning