Thesis (MTh)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: In this dissertation the Youth ministry of the Nkhoma Synod Church of Central Africa Presbyterian from 1889-2010 is discussed. The manuscript strives to determine the theological foundation of the Youth ministry by answering the question; “What has been the theological foundation of the Nkhoma synod Youth ministry from 1889 to 2010?” To answer this question the researcher has indicated what programs have been arranged for the Youth and with the Youth and has indicated as far as possible how this was done. The researcher continued his research by determining why the programs were implemented in that specific manner to determine the motivation for the implementation of the program. The researcher presents a historical overview of the development of the Youth ministry in this manuscript from which the theological foundation of the Nkhoma synod Youth ministry will be determined. Chapter One gives a brief summary of the development of the Youth ministry in the Nkhoma synod as a background against which the researcher motivates the research and describes the research question. Chapter Two describes the research methodology, methods of data collection and data analysis, the ethical aspects of the research and the manner of pretesting that was used during the research. Chapter Three presents an overview of the geographical, socio-cultural and historic-political environment to describe the context within which the Youth ministry of the Nkhoma synod developed. The description of the above developments enables the reader to understand the framework within which the Youth ministry of the Nkhoma synod developed. Chapter Four presents an overview of the establishment and development of the Nkhoma synod with regard to the school system. It continues to describe the government’s increased influence and takeover of the school system and the accompanying developments that took place due to the above-mentioned removal of the school system from the Nkhoma synod. Chapter Five describes the development of the youth ministry with regard to the activities and programs run within the Church structures of the Nkhoma synod. It includes the development of a Family ministry, Christian Education and Church Youth movements. Chapter Six briefly states the theological foundation of the Nkhoma synod and and proceeds to explain how the theological foundation of the Youth ministry of the Nkhoma synod was determined. It describes five theological terms, eight modes of ministry and four approaches to ministry, that are used to determine the theological foundation of the Youth ministry as described in chapters Four and Five In Chapter Seven the semi-structured interviews are analysed to identify recurring themes and possible discrepancies that might surface. The literature study, as found in chapters Four and Five, is analysed using a thematic content analyses, with reference to the modes and approaches to ministry as discussed in chapter Six. It is affirmed that the theological foundation of the Youth ministry is based upon the Word of God and the Catechism of Heidelberg and that the approach to ministry is preparatory and evangelical. In Chapter Eight the whole dissertation is summarized, conclusions are drawn and possible recommendations are made with the aim of improving the present Youth ministry. The researcher also identifies possible areas for future studies.

Thesis (DTh)--University of Stellenbosch, 2002. / ENGLISH ABSTRACT: This dissertation develops a theory for doing Malawian urban ministry called "Holistic hermeneutical practical theology." The effects of urbanization: secularization, disorientation, poverty and pollution in Malawi's urban centers make it difficult for the CCAP to implement successful ministry that deals with the shantytowns' circumstances. Chapter one: The first chapter describes the Malawian urban context. It defines the five components of the researcher's topic of study: "Urban poverty as a challenge for ministry within the Malawian (African) context" and the three components of the methodology: "Holistic hermeneutical practical theology." Four relational hypotheses are formulated to guide the study. Different research methods applied to gathering information for chapters of this dissertation are documented at the end of this chapter. Chapter two: The second chapter examines the CCAP's existing ministry practice and addresses the first hypothesis: "Its rural background and theory of ministry prevent the CCAP from developing an effective urban ministry that adequately addresses the problems of the poor." The missionaries introduced a comprehensive ministry approach to the early leaders of the CCAP Nkhoma Synod. In the process of blending the missionary approach to ministry in the local Chewa context, a philosophy of ministry that emphasizes spiritual salvation (neglecting the physical needs) was developed in the CCAP Nkhoma Synod. This approach poses a problem for the Church to adequately address the physical needs and realities of Malawians in the cities. Chapter three: The third chapter discusses the poverty situations of Malawian and South African shantytowns and slums and is the result of research conducted in order to examine the validity of the four hypotheses. The responses of the groups interviewed were helpful for an understanding of the current congregational challenges and ministry opportunities in urban areas. This chapter addresses issues of this thesis positively: research objectives, the population growth data of urban inter-censal, a brief historical description of Malawian cities, the government efforts to address urban challenges and problems, the CCAP ministry approach to urban ministry, and a brief description of two South African poverty scenarios. The research reveals that the church and the government work independently of each other. In this way the validity of the third hypothesis: "A holistic approach to urban ministry with joint forums for development is needed to address urban poverty problems," is confirmed. Chapter four: This chapter describes the extent of poverty in Malawi, which is most disturbing. The recent studies on Malawian poverty indicate that the poverty scenario is a pervasive problem affecting approximately 60% of the population; urban poverty, in particular, is 65%. Furthermore, chapter four discusses a number of issues, some of which are: a description and Christian views of the poor, an overview definition of urban poverty, the causes of poverty and the vocation of the urban church. The cities' informal economies can make a huge difference in the lives of the poor. All of the four hypotheses form the background to this chapter. Chapter five: Chapter five examines four different approaches of the urban ministry in poverty areas. The purpose of this chapter is to understand the approaches of current work in poverty areas. Various approaches are discussed: community organization, effective congregationally based advocacy ministries, a liberation model, and a church in solidarity with the poor and oppressed. This chapter repeatedly confirms the first and the fourth hypotheses. Chapter six: In this chapter the theory of a holistic, hermeneutical practical theology is applied to a number of activities called pillars, juxtapositioning it with the four hypotheses. This is presented as a model for doing urban ministry in Malawian (African) cities. In the process of describing or developing the model, the four hypotheses - that have already been thoroughly proved and discussed - now serve as orientation markers pointing the CCAP towards its future role in urban ministry. The model emphasizes a hermeneutic-communicative praxis, which makes it constantly concerned with understanding the Christian meaning produced in the past, and relating it to interaction with the present-day faith community. Thus, the church in urban Malawi will address the challenges presented by the effects of urbanization and industrialization. The model's ten pillars are discussed: i) ministry in a new era and context, ii) urban ministry among the poor requires community participation, iii) proclaiming the Gospel in word and deed, iv) Christian faith development, v) urban evangelism, vi) effective pastoral care, vii) the need to build faith communities, viii) the need to equip the urban mission, ix) moving towards ecumenical alliances in African cities, and x) the importance of congregational studies. Chapter seven is a summary and conclusion of the dissertation. It discusses issues of this thesis positively: orientation of the study hypotheses, congregational study methods used in each chapter, the study's path and results, the contribution the study has made to the existing knowledge, and the conclusion of the whole dissertation. Urbanization is Africa's new missionary challenge for this century. The Christian task in Africa is the mission of the continent, which is in the process of rapid urbanization. If the church delays its adaptation to the urban context (the theories of which are changing constantly) it will forsake her strategic mission of being a foreign body in the world, where the old and new overlap in her, rendering her too early for heaven and too late for the earth. / AFRIKAANSE OPSOMMING: Hierdie proefskrif ontwikkel 'n teorie vir die Malawiese stadsbediening wat beskryf word as 'n "Holistiese hermeneutiese praktiese teologie." Die invloed van verstedeliking, sekularisasie, disorientasie, armoede en besoedeling in Malawi se stedelike sentra maak dit moeilik vir die CCAP om suksesvolle bediening, onder plakkersdorp-omstandighede, te implementeer. Hoofstuk een: Die eerste hoofstuk beskryf die Malawiese stedelike konteks. Dit omskryf die vyf komponente van die navorser se studie-onderwerp, "Stedelike armoede as 'n uitdaging vir die bediening binne die Malawiese (Afrika) konteks" en die drie komponente van die metodologie, "Holistiese hermeneutiese praktiese teologie." Vier verwante hipoteses is geformuleer om as riglyn vir die studie te dien. Verskillende navorsingsmetodes, toegepas vir die inwin van inligting vir hierdie tesis se hoofstukke, word aan die einde van hierdie hoofstuk beskryf. Hoofstuk twee: Die tweede hoofstuk ondersoek die CCAP se huidige bedieningspraktyk en is gerig tot die eerste hipotese: "Die CCAP se landelike agtergrond en teorie van bediening verhinder die kerk om 'n doeltreffende stedelike bediening te ontwikkel wat die armes se probleme toereikend kan aanspreek." Die sendelinge het 'n omvattende bedieningsbenadering vir die vroee leiers van die CCAP Nkhoma Sinode ingestel. In die proses om die sendingbenadering tot die bediening in die plaaslike Chewa konteks in te voer, is 'n filosofie van bediening wat die geestelike verlossing beklemtoon (terwyl fisieke behoeftes verwaarloos word) in die CCAP Nkhoma Sinode ontwikkel. Hierdie benadering veroorsaak 'n probleem vir die Kerk om die fisieke behoeftes en realiteite van stedelike Malawiers toereikend aan te spreek. Hoofstuk drie: Die derde hoofstuk bespreek die Malawiese en Suid-Afrikaanse plakkersdorpe en agterbuurtes se toestande van armoede. Die hoofstuk is die produk van navorsing wat die geldigheid van die vier hipoteses ondersoek het. Die reaksies van die groepe met wie onderhoude gevoer is, het bygedra tot 'n begrip van die huidige gemeentelike uitdagings en bedieningsgeleenthede in stedelike gebiede. Die proefskrif spreek die volgende kwessies in hierdie hoofstuk aan: navorsingsdoelstellings, die tussentydse data van die bevolkingsgroei van stedelike gebiede, 'n kort historiese beskrywing van Malawiese stede, die regering se pogings om stedelike uitdagings en probleme aan te spreek, die benadering van die CCAP tot stedelike bediening en 'n kort beskrywing van twee Suid-Afrikaanse armoede-tonele. Die navorsing toon dat die kerk en die regering onafhanklik van mekaar werk. Dus, die geldigheid van die derde hipotesis: "'n Holistiese benadering tot die stedelike bediening met gemeenskaplike forums vir ontwikkeling is nodig om stedelike armoedeprobleme aan te spreek" is hiermee bevestig. Hoofstuk vier: Hierdie hoofstuk beskryf die ontstellende impak van armoede in Malawi. Die onlangse studies, met betrekking tot Malawiese armoede, toon dat die armoede-toneel 'n deurdringende probleem is wat ongeveer 60% van die bevolking raak; stedelike armoede, in die besonder, is 65%. Hoofstuk vier bespreek 'n aantal kwessies, sommige hiervan is: 'n beskrywing en Christelike perspektief op armoede, 'n oorsigtelike definisie van stedelike armoede, die oorsake van armoede en die roeping van die stedelike kerk. Die stede se informele ekonomiee kan 'n baie groot verskil in die lewens van die armes maak. Al vier hipoteses vorm die agtergrond van hierdie hoofstuk. Hoofstuk vyf: Hierdie hoofstuk ondersoek vier verskillende benaderinge tot stedelike bediening in areas van armoede. Die doel van hierdie hoofstuk is om die benaderinge in arm dele te verstaan. Verskeie benaderinge word bespreek: gemeenskapsorganisasie, doeltreffende gemeentelik-gebaseerde voorspraakbedienings, 'n bevrydingsmodel en 'n kerk in solidariteit met die armes en verdruktes. Hierdie hoofstuk bevestig herhaaldelik die eerste en die vierde hipoteses. Hoofstuk ses: In hierdie hoofstuk word die teorie van 'n holisties-hermeneutiese praktiese teologie toegepas op 'n aantal aktiwiteite, wat pillare genoem word, en stel dit naas die vier hipoteses. Dit word voorgestel as 'n model vir stedelike bediening in Malawiese (Afrika) stede. In die proses om die model te beskryf of ontwikkel, dien die vier hipoteses (wat reeds deeglik bewys en bespreek is) nou as orientasie merkers wat die pad vir die CCAP vir sy toekomstige rol in die stedelike bediening aanwys. Die model beklemtoon 'n hermeneuties-kommunikatiewe praktyk, wat gedurig in verband gebring word met die verstaan van die Christelike betekenis wat in die verlede teweeggebring is en wat dit, deur interaksie met die huidige geloofsgemeenskap, in verband bring. Dus, die kerk in stedelike Malawi sal die uitdagings wat deur die uitwerking van verstedeliking en industrialisasie gebied word, aanspreek. Die model se tien pilare word bespreek: i) bediening in 'n nuwe era en konteks, ii) stedelike bediening onder die armes benodig gemeenskapsdeelname, iii) die verkondiging van die Evangelie in woord en daad, iv) Christelike geloofsontwikkeling, v) stedelike evangelisasie, vi) doeltreffende pastorale sorg, vii) die behoefte vir die opbou van geloofsgemeenskappe, viii) die behoefte om die stedelike sending toe te rus, ix) die vorm van ekurneniese alliansies in die stede van Afrika, en x) die belangrikheid van gemeentelike studies. Hoofstuk sewe is 'n opsomming en afsluiting van die proefskrif. Dit bespreek hierdie proefskrif se hoofpunte: die orientasie en die hipoteses van die studie, die navorsingsmetodes geimplementeer in elke hoofstuk, die studie se ontwikkeling en resultate, die bydrae van die studie tot die bestaande kennis, en die afsluiting van die werk. Afrika se stede is die nuwe sendinguitdaging. Die Christelike taak in Afrika is die evangelisasie van die vasteland wat tans in die proses van snelle verstedeliking is. Indien die kerk in gebreke bly om in die stedelike konteks aan te pas, sal die kerk sy strategiese missie versaak om lig in die wereld te wees.

L’Afrique est la région du monde, dans laquelle, existe le plus grand nombre de crises armées sanglantes. Depuis les indépendances, cette région n’a jamais véritablement connu de paix et de sécurité dans toutes ses entités régionales. Dans ce sombre tableau africain, l’Afrique centrale occupe une place peu enviable. Abandonnée à son triste sort à la fin de la Guerre Froide, des pays, tel que le Gabon, décidèrent de particulièrement orienter leur politique étrangère dans le but d’aider les États en crises, de son environnement immédiat, à recouvrir une certaine stabilité mais surtout dans une logique de sécurisation nationale. Petit pays d’Afrique centrale, le Gabon ressent les effets de l’instabilité régionale persistante. Cet engagement gabonais pour la paix n’est pas né avec son accession à la souveraineté. Il s’est construit au fil des années. Son action pour sa construction et sa sécurité nationale n’a jamais eu pour but de reproduire, exactement, le même modèle de stabilité qu’il connait mais, uniquement, d’arriver aux silences des armes. Il est évident que comme tout engagement politique, l’action r gabonaise présente certaines limites et l’État devrait prendre des mesures pour que l’objectif de sécurité nationale soit atteint sans ambages. Néanmoins, l’action de tel pays est importante car en priorisant le dialogue, ils fournissent un travail de fourmis qui arrive, tout de même, à mettre un terme aux effusions de sang et à leur tendance au débordement. / Africa is the region of the world, in which, exists the largest number of bloody armed crises. Since the independences, this region has never really known peace and security in all its regional entities. In this somber african board, Central Africa occupies an unenviable place. Abandoned in its sad fate at the end of the Cold War, countries, such as the Gabon, decided to direct particularly their foreign policy with the aim of helping states in crises, of its immediate environment, to cover a certain stability But especially in a logic of national reassurance. Small country of Central Africa, the Gabon feels the effects of the persistent regional instability. This Gabonese commitment for the peace was not born with its entry in the sovereignty. It built itself over the years. Its action for its building and national security has never aimed at reproducing exactly the same model of stability which it can but only arrive at the silence of weapons. It is obvious that as any political commitment, the gabonese regional action presents certain limits and the state should take measures aiming at a better international assertion. Nevertheless, the action of such country is important because by prioritizing the dialogue, they supply a painstaking job which manages, all the same, to put an end to the bloodsheds and to their tendency to the overflowing.

Dans le Supergroupe Ouest-Congolais du bassin du Niari-Nyanga (Afrique centrale), les marqueurs des Glaciations Globales Sturtienne et Marinoenne sont représentés par les formations des «Diamictite inférieure» et «Diamictite supérieure».Ce travail de thèse présente une étude à haute résolution du Cap Carbonate associé à la Diamictite supérieure (6 coupes dans le bassin et 2 coupes dans la zone externe de la Chaîne du Mayombe). Les études pétrographiques révèlent la préservation des structures sédimentaires primaires et permettent de définir six microfaciès (MF0 à MF5) caractéristiques des paléoenvironnements de types inter- à supratidaux ou subtidaux. Dans le Cap Carbonate étudié, les indices de Kübler montrent une évolution croissante depuis la diagenèse profonde dans le bassin jusqu'à l'épimétamorphisme dans la zone externe de la Chaîne du Mayombe. Le signal isotopique ([delta]13C et [delta]18O) des Cap Carbonate échantillonnés est généralement reproductible dans le synclinal comme dans la chaîne, avec les valeurs du [delta]13C montrant une excursion négative variant de -2.6 [pour mille] à -5.6 [pour mille]. Les valeurs de d18O oscillent entre -6 [pour mille] et -12 [pour mille]. Par ailleurs, la confrontation des données minéralogiques, chimiques et isotopiques indique une influence négligeable des transformations post-sédimentaires sur la signature isotopique du Cap Carbonate indiquant la préservation des valeurs du [delta]13C de l'océan néoprotérozoïque. Enfin, l'ensemble des données de cette thèse et les résultats préliminaires des « Projets GLANEC» replacés dans un contexte régional permettent de définir le Membre SCIa du synclinal du Niari-Nyanga comme un Cap Carbonate lié à la Glaciation Marinoenne. / Within West-Congolian Supergroup of Niari-Nyanga Basin (Central Africa), the markers of Sturtian and Marinoan Global Glaciations are documented by the so-called «Lower Diamictite» and «Upper Diamictite». This work is based on 6 and 2 lithological sections from the basin and the external zone of the Mayombe fold belt. It corresponds to a high-resolution study of the Cap Carbonate lying unconformably on the Upper Diamictite. Petrographic analyses show preservation of primary sedimentary structures and lead to define six microfacies (MF0 to MF5). These microfacies caracterize paleoenvironments such as inter- to supratidal or subtidal types. Kübler index values of the studied Cap Carbonate display an increasing evolution from East to West, ie from a deep diagenesis in the basin to an epimetamorphism in the Mayombe external zone. Stable isotope signature ([delta]13C, [delta]18O) of the various components of this Cap Carbonate is reproducible throughout the basin as in the Mayombe external zone, with [delta]13C values displaying a negative excursion, decreasing from -2.6 ? to -5.6 ?. [delta]18O values of these components vary between -6 ? and -12 ?. Moreover, comparison between mineralogic, chemical and isotopic data indicates that post-sedimentary transformations had a very negligible influence on the isotopic signature of the Cap Carbonate, indicating preservation of d13C values of the Neoproterozoic ocean. Finally, when they are compared with other regional studies, all data of the present work and the preliminary results of the GLANEC Projects lead to the conclusion that the SCIa Member of the Niari-Nyanga Basin must be considered as a Cap Carbonate related to the Marinoan Global Glaciation.

Ao longo da segunda metade do século XIX, a região da África Centro-Ocidental foi palco do processo de intensificação de expedições europeias rumo ao interior do continente que conjugavam interesses econômicos, políticos e científicos. Esta pesquisa busca analisar o papel de relevo ocupado pela cultura material na agenda científica da expedição portuguesa à Lunda chefiada pelo militar português Henrique de Carvalho entre 1884 e 1888. Pretendemos também avaliar as potencialidades que o estudo sobre os objetos apresentam enquanto fontes para a compreensão mais ampla acerca das agências históricas africanas. Para tanto, selecionamos as obras Descripção da Viagem à Mussumba do Muatiânvua (1890-1894) e Ethnographia e História Tradicional dos Povos da Lunda (1890) e, de maneira complementar, o Album da Expedição ao Muatianvua (1887) e o catálogo Collecção Henrique de Carvalho (Expedição à Lunda), editado pela Sociedade de Geografia de Lisboa (1896). Assim, pela ótica da história social, pretendemos investigar como as exigências e predileções centro-africanas por determinados artigos moldaram as relações comerciais travadas nesse período, abordando os processos de incorporação e ressignificação de objetos particularmente, bens de prestígio e insígnias de poder - interpretados como expressões de identidades, códigos sociais e hierarquias políticas no âmbito dessas sociedades e de suas relações com os europeus. / During the second half of the nineteenth century, West-Central Africa was the stage of an intensification of European expeditions that channeled economic, political and scientific interests towards the continents interior. The following study intends to analyze the important role occupied by material culture in the scientific agenda of the portuguese expedition to the Lunda headed by military leader Henrique de Carvalho between 1884 and 1888. We also intend to evaluate the potential that the study of such objects provide like sources for a broader understanding about African agencies historical. For this purpose, we selected the works Descripção da Viagem à Mussumba do Muatiânvua (1890-1894) and Ethnographia e História Tradicional dos Povos da Lunda (1890) and in a complementary way, the Album da Expedição ao Muatianvua (1887) and Collecção Henrique de Carvalho (Expedição à Lunda), published by the Geographical Society of Lisbon (1896). Thus, from the perspective of social history, we intend to investigate how the requirements and predilections manifested in Central-African societies for certain items shaped the commercial relationships established during this period. We also address the process of the incorporation and resignification of objects - particularly prestige goods and insignia of power and how material culture can be interpreted as identity expressions, social codes and political hierarchies within those societies and their relations with the Europeans.

Este é um estudo sobre os grupos de carregadores das caravanas do comércio de longa distância na Lunda, em fins do século XIX e início do XX. O objetivo principal é argumentar que esses trabalhadores foram responsáveis pela movimentação da engrenagem do comércio regional no espaço que atualmente compreende o nordeste do território de Angola. Sua importância decorreu do conhecimento especializado que detinham, sem o qual não seria possível a circulação de mercadorias e informações por vastas regiões. O estudo levou em conta os elementos organizadores das caravanas de comércio: diferentes grupos de carregadores, papéis sociais e hierarquias, produtos transportados e itinerários percorridos. O exame destes aspectos possibilitou observar o dinamismo do comércio de longa distância, com o qual se conectavam os negócios internacionais. Em um contexto finissecular, marcado pela pressão da era dos impérios, porque sabiam fazer, os carregadores foram um elemento essencial do comércio de longa distância, muito importante para a vitalidade das sociedades da Lunda. / This study is about long distance porters and the trade in Lunda between 1870 and 1920. I argue that porters played a very important role in the operation of regional trade, being responsible for moving goods and informations in very distance areas. My analysis covers several elements: how porters articulated trade caravans, how they organized themselves in different groups permeated by different social hierarchies, the variety of transported goods and trade routes. These elements reveal the dynamism of long-distance trade - extremely important to the vitality of Lunda societies.

L'objectif de cette thèse est de s'interroger sur la nature de la présence portugaise en Angola au 16e et au 17e siècles. Cette période correspond au début de l'essor du commerce transatlantique des esclaves dans l'Atlantique sud. Nous insistons sur les spécificités de cette présence : premièrement, nous mettons l'accent sur son caractère territorial, par opposition à la plupart des autres régions d'Afrique où la présence européenne s'est limitée à l'établissement de comptoirs commerciaux sur la côte ; deuxièmement, nous accordons une importance particulière à la rivalité luso-néerlandaise qui s'est déroulée dans la première moitié du 17e siècle et qui a correspondu à un des premiers affrontements territoriaux inter-européens en Afrique sub-saharienne. Dans les quatre premiers chapitres, qui recouvrent la période allant de 1483 – date de l'arrivée des Portugais à l'embouchure du Congo – à 1671 – date de la victoire décisive des Portugais sur le Ndongo pour le contrôle de l'hinterland de Luanda – , nous abordons la question de l'espace colonial. Il s'agit d'analyser les étapes de la formation de cet espace en nous centrant sur les interactions entre les différents pouvoirs politiques, aussi bien africains qu'européens. Nous nous intéressons ainsi aux efforts de délimitation spatiale de la part des pouvoirs coloniaux, conséquence aussi bien de la présence physique des agents coloniaux que de la production d'un savoir géographique. Dans le cinquième et dernier chapitre, nous mettons l'accent sur l'émergence de la nouvelle société que nous qualifions de coloniale, en analysant les caractéristiques et des dynamiques sociales des agents qui la composent. / This thesis aims to question the nature of the Portuguese presence in Angola during the 16th and 17th centuries, a period which corresponds to the rise of the transatlantic slave trade in the South Atlantic Ocean. We pay particular attention to the distinctive features of the Portuguese presence: firstly, we insist on its territorial nature, that differentiates it from other African areas where Europeans went no further than setting up trading posts on the coastline; secondly, we focus on the Luso-Dutch rivalry that took place during the first half of the 17th century, leading to one of the first intra-European confrontations on sub-Sahara African soil. The first four chapters address the question of the colonial territory: they cover the period from 1483, when the Portuguese reached the mouth of the Congo River, to 1671, date of the decisive Portuguese victory over the Ndongo kingdom for the control of the Luanda hinterland. We analyse the stages in the formation of this territory by focusing on the interactions between African and European political powers. This focus leads us to take a special interest in the colonial powers' attempts at delimiting the colonial territory, a delimitation based on both the action of the colonial agents and the production of new geographical knowledge. In the fifth and final chapter, we analyse the social dynamics and characteristics of the agents that constitute what we see as a new emerging colonial society.

La biodiversité des forêts tropicales humides (FTH) est inégalement répartie dans les trois principales régions des tropiques : les Néotropiques, l’Asie du sud-est et l’Afrique tropical. Même si les forêts africaines contiennent une diversité en espèces végétales et un endémisme importants, leur richesse spécifique reste faible par rapport aux autres massifs forestiers tropicaux. Cette disparité serait liée à l’impact négatif d’événements d’extinction durant le Cénozoïque plus intenses dans les forêts africaines. A l’échelle du bassin du Congo, les niveaux de diversité important et l’endémisme des forêts africaines seraient liés à l’hypothèse d’existence de forêts refuges du passé. Cette hypothèse suggère une contraction des forêts en ‘refuges’ durant les événements climatiques du Dernier Maximum Glacier (DMG, entre 24’000 et 12’000 Ans).L’objectif principal de cette thèse est d’étudier l’évolution des forêts africaines en réponse aux changements climatiques sur des pas de temps anciens (millions d’années) et plus récent (milliers d’années). Pour cela nous étudions deux groupes de palmiers Africains : les rotins de la sous-tribu des Ancistrophyllinae et le genre de sous-bois des FTH d’Afrique Centrale Podococcus composé de deux espèces P. barteri et P. acaulis. Le premier groupe nous renseigne sur les événements d’extinctions anciens durant le Cénozoïque, alors que le second permet d’étudier la réponse des FTH face aux changements climatiques du Pléistocène. L’approche utilisée dans cette thèse consiste à 1) reconstruire l’histoire évolutive des rotins, et 2) inférer la dynamique évolutive des deux espèces de Podococcus dans le temps. Cinq objectifs spécifiques structurant deux grandes parties de la thèse ont été retenus. Première partie : (i) reconstruire les relations phylogénétiques chez les Ancistrophyllinae à l’aide de marqueurs chloroplastiques et nucléaires, (ii) estimer les âges de divergences puis tester l’impact des événements d’extinction chez les Ancistrophyllinae. Seconde partie : (iii) construire les modèles de niches écologiques et inférer les zones de stabilité écologique des deux espèces de Podococcus depuis le DMG, (iv) reconstruire les relations phylogéographiques chez Podococcus à partir de plastomes entier obtenus avec du Séquençage Nouvelle Génération ‘NGS’ et (v) évaluer la concordance entre la diversité génétique et la stabilité écologique des populations de Podococcus.Les résultats suggèrent que les espèces d’Ancistrophyllinae se sont probablement diversifiées de manière constante mais avec un taux d’extinction assez élevé ponctué par un ou plusieurs événements d'extinction sévères au cours du Cénozoïque. Les Ancistrophyllinae ont divergé durant l’Eocène et la plupart des espèces sont apparues après 10 Ma durant la fin du Miocène et du début du Pliocène. Chez le genre Podococcus, une corrélation significative entre la diversité génétique unique et la stabilité écologique a été démontré appuyant l’hypothèse des forêts refuges. Les populations écologiquement stables et diversifiées sont principalement localisées dans les zones montagneuses comme les Monts de Cristal et les Monts Doudou au Gabon, mais aussi dans les forêts littorales atlantiques au Gabon et au Cameroun. Par contre la plupart des populations datent d’avant le DMG ce qui traduit une réponse des espèces sur plusieurs cycles glaciers. Les résultats de cette thèse montrent que les changements climatiques anciens et plus récents ont fortement influencé l’évolution et la dynamique des espèces forestières d’Afrique Centrale. De plus, nos résultats ont permis d’identifiés les forêts côtières comme prioritaires pour la conservation de la diversité en Afrique Centrale. / Tropical rain forests (TRF) biodiversity is not equally distributed between the three main tropical regions: Neotropics, South East Asia and tropical Africa. Even though African rain forests display high levels of diversity and endemism, this diversity is low compared to that of the other tropical regions. One of the main hypotheses advanced to explain this lower species diversity is that the African flora has undergone higher extinction rates during the Cenozoic. Across the Congo basin, high levels of species diversity and endemism is thought to be linked to the hypothesis of forest refugia. This hypothesis suggests a contraction of rain forests in 'refugia' during the Last Glacial Maximum (LGM, between 24’000 and 12’000 Years).The aim of this thesis is to study the evolution of African rain forests in response to climate change on ancient (million years) and more recent (thousands of years) time scales. For this we study two groups of African palms: the rattans of the sub-tribe Ancistrophyllinae and the understory genus of Central African TRF Podococcus with two species P. barteri and P. acaulis. The first group provides information about ancient extinctions events during the Cenozoic, while the second is used to study the response of TRF during Pleistocene climate change in Central Africa. The approach used in this thesis is to 1) reconstruct the evolutionary history of African rattans, and 2) to infer the evolutionary dynamics of the two species of Podococcus through time. The five specific objectives structuring two main parts of the thesis are: First part: (i) reconstruct phylogenetic relationships among Ancistrophyllinae using plastid and nuclear markers, (ii) estimate divergence times and test the impact of extinction events on Ancistrophyllinae. Second part: (iii) build ecological niche models and infer the areas of habitat stability of the two species of Podococcus from the LGM, (iv) reconstruct phylogeographic relationships of populations of Podococcus from whole plastomes obtained using Next Generation Sequencing and (v) assess the correlation between genetic diversity and ecological niche stability of all populations of Podococcus.Results suggest that Ancistrophyllinae has possibly undergone a constant diversification with a relatively high extinction rate punctuated by one or more severe extinction events during the Cenozoic. Ancistrophyllinae diverged during the Eocene with most species originating to the Late Miocene after 10 Ma. In the genus Podococcus, a significant correlation between the unique genetic diversity and habitat stability was demonstrated supporting the hypothesis of forests refugia in Central Africa. Ecologically stable and diverse populations are mainly located in mountainous areas such as Monts de Cristal and Monts Doudou in Gabon, but also in the Atlantic coastal forests in Gabon and Cameroon. In contrast, most of the populations predate the LGM reflecting that species respond over several glacial cycles. Results of this thesis highlight that ancient and recent climate changes have strongly influenced the evolution and dynamics of Central African forests. In addition, our results allowed the identification of African Atlantic coastal forests as an important conservation priority.

En Afrique centrale, la chasse commerciale contribue fortement au ravitaillement en protéines des ménages en milieu villageois comme en milieu urbain. Elle est accusée de surexploiter la ressource faune, d’avoir un impact très négatif sur la biodiversité animale et sur la régénération forestière et de faire naître des risques importants de développement de maladies émergentes. A partir du cas centrafricain, nous voulons montrer que : la chasse commerciale s’inscrit dans une histoire longue, qui débute avec la colonisation européenne et se poursuit sans rupture, mais avec des acteurs différents, jusqu’à nos jours ; les prélèvements portent principalement sur la faune petite et moyenne qui présente une dynamique naturelle de reproduction très forte et qui supporte bien des pressions de chasse élevées ; la venaison, surtout la viande boucanée, joue un rôle important pour la sécurité alimentaire des ruraux et des urbains les plus pauvres ; la distribution de ce produit vivrier fait intervenir différents acteurs de l’économie informelle ; la filière est illégale, mais jamais criminelle ; la viande de chasse n’est pas en accès libre, mais la filière est fortement régulée par des contraintes sociales, économiques, géographiques et techniques. A partir de ces constats, nous proposons une nouvelle approche politique de la gestion de la faune en Afrique centrale, privilégiant une gestion adaptative de la faune commune sur la base des territoires villageois, recentrant l’Etat sur ses fonctions régaliennes d’organisation de la sécurité alimentaire globale de la population et réorientant la recherche vers la biologie de la petite faune et l’appui technique aux collectivités locales. / In central Africa, commercial hunting strongly contributes to the protein supply of rural and urban households. It is accused of wildlife resources overexploitation, with very negative impacts on animal biodiversity and forest regeneration and with important risks of emergent diseases development. From the Central African Republic case, we want to show that: commercial hunting has a long history, which begins with European colonization and goes on until today, without breaking, but with different actors ; takings mainly focuse small and medium wildlife which naturally has very strong dynamics of reproduction and which supports high pressures of hunting; Bushmeat, especially smoked meat, plays an important part for food safety of rural and urban poorest; distribution of this food products involves various actors of informal economy; this sector is illegal, but never criminal; bushmeat is not in open access, but the network is strongly controlled by social, economic, geographical and technical constraints. From these reports, we propose a new policy approach to wildlife management in central Africa, favoring an adaptive management of common fauna based on village territory, focusing State on its kingly functions to organize proteinic food safety for all people and orientating research towards small fauna biology and local communities technical support.

Este é um estudo sobre os grupos de carregadores das caravanas do comércio de longa distância na Lunda, em fins do século XIX e início do XX. O objetivo principal é argumentar que esses trabalhadores foram responsáveis pela movimentação da engrenagem do comércio regional no espaço que atualmente compreende o nordeste do território de Angola. Sua importância decorreu do conhecimento especializado que detinham, sem o qual não seria possível a circulação de mercadorias e informações por vastas regiões. O estudo levou em conta os elementos organizadores das caravanas de comércio: diferentes grupos de carregadores, papéis sociais e hierarquias, produtos transportados e itinerários percorridos. O exame destes aspectos possibilitou observar o dinamismo do comércio de longa distância, com o qual se conectavam os negócios internacionais. Em um contexto finissecular, marcado pela pressão da era dos impérios, porque sabiam fazer, os carregadores foram um elemento essencial do comércio de longa distância, muito importante para a vitalidade das sociedades da Lunda. / This study is about long distance porters and the trade in Lunda between 1870 and 1920. I argue that porters played a very important role in the operation of regional trade, being responsible for moving goods and informations in very distance areas. My analysis covers several elements: how porters articulated trade caravans, how they organized themselves in different groups permeated by different social hierarchies, the variety of transported goods and trade routes. These elements reveal the dynamism of long-distance trade - extremely important to the vitality of Lunda societies.