@phdthesis{Audretsch2010,
  author    = {Audretsch, Andreas},
  title     = {Zur Entstehung von Good Governance : Gr{\"u}nde, Muster und Bedingungen einer afrikanischen Entwicklung ; das Beispiel Ghana},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-42310},
  school      = {Universit{\"a}t Potsdam},
  year      = {2010},
  abstract  = {Ghana ist ein Musterbeispiel daf{\"u}r, dass ein Entwicklungsland den Weg zu Good Governance schaffen kann. In vielen Studien wird dem Land im afrikanischen Vergleich heute bescheinigt, hier ein Vorreiter zu sein. Dies ist Ausgangslage der vorliegenden Studie, die der Frage nachgeht „Welche Gr{\"u}nde, Muster und Bedingungen f{\"u}hren zur Entstehung von Good Governance?". Im Zentrum der vorliegenden Studie steht, wie aus der erkenntnisleitenden Fragestellung hervorgeht, eine empirische Untersuchung zur Entstehung von Good Governance und damit ein Transformationsprozess. Dieser wird bewusst {\"u}ber einen sehr langen Zeitraum ({\"u}ber ein halbes Jahrhundert) untersucht, um auch langfristige Entwicklungen einbeziehen zu k{\"o}nnen. Die Studie wird mit Hilfe eines „Mixed-Methods-Ansatzes" sowohl unter R{\"u}ckgriff auf quantitative als auch auf qualitative Methoden durchgef{\"u}hrt, was sich im R{\"u}ckblick als sehr ertragreich erwiesen hat. Zun{\"a}chst wird die Qualit{\"a}t der Governance {\"u}ber den gesamten Zeitraum anhand von sechs Indikatoren gemessen. Danach werden qualitativ die Gr{\"u}nde f{\"u}r die Fort- und R{\"u}ckschritte analysiert. Dabei lassen sich immer wieder Systematiken herausarbeiten, wie zum Beispiel zirkul{\"a}re Entwicklungen, die {\"u}ber viele Jahre den Weg hin zu Good Governance verhinderten, bis jeweils Ausbr{\"u}che aus den Kreisl{\"a}ufen geschafft werden konnten. Sowohl in der demokratischen und rechtsstaatlichen Entwicklung als auch bezogen auf die Versorgung der Bev{\"o}lkerung mit {\"o}ffentlichen G{\"u}tern und die wirtschaftliche Entwicklung. Auch wenn die verschiedenen Bereiche von Good Governance zun{\"a}chst einzeln untersucht werden, so zeigen sich gleichzeitig deutlich die Wechselwirkungen der Komponenten. Zum Beispiel kristallisiert sich klar heraus, dass Rechtsstaatlichkeit sowohl auf die Stabilit{\"a}t politischer Systeme wirkt, als auch auf die wirtschaftliche Entwicklung. Ebenso beeinflussen diese wiederum die Korruption. {\"A}hnliche Verkn{\"u}pfungen lassen sich auch bei allen anderen Bereichen nachvollziehen. Die Entwicklung eines Landes kann also nur unter Ber{\"u}cksichtigung eines komplexen Governance-Systems verstanden und erkl{\"a}rt werden. Dabei k{\"o}nnen die Wechselwirkungen entweder konstruktiv oder destruktiv sein. Die Verflechtungen der einzelnen Bereiche werden in einem Negativ- und dann in einem Positiv-Szenario festgehalten. Diese Idealtypen-Bildung spitzt die Erkenntnisse der vorliegenden Arbeit zu und dient dem analytischen Verst{\"a}ndnis der untersuchten Prozesse. Die Untersuchung zeigt, wie Good Governance {\"u}ber das Zusammenspiel verschiedener Faktoren entstehen kann und dass es wissenschaftlich sehr ertragreich ist, Transformationsforschung auf ein komplexes Governance-System auszuweiten. Hierbei werden die vielen empirisch erarbeiteten Ergebnisse zu den einzelnen Transformationen zu komplexen, in sich greifenden Gesamtszenarien zusammengef{\"u}hrt. Da es bisher keine explizite Good Governance-Transformationsforschung gab, wurde hiermit ein erster Schritt in diese Richtung getan. Es wird dar{\"u}ber hinaus deutlich, dass eine Transformation zu Good Governance nicht durch eine kurzfristige Ver{\"a}nderung der Rahmenbedingungen zu erreichen ist. Es geht um kulturelle Ver{\"a}nderungen, um Lernprozesse, um langfristige Entwicklungen, die in der Studie am Beispiel Ghana analysiert werden. In vielen vorangegangenen Transformationsstudien wurde diese zeitliche Komponente vernachl{\"a}ssigt. Ghana hat bereits viele Schritte getan, um einen Weg in die Zukunft und zu Good Governance zu finden. Die Untersuchung dieser Schritte ist Kern der vorliegenden Arbeit. Der Weg Ghanas ist jedoch noch nicht abgeschlossen.},
  language  = {de}
}
@book{BeckerKopp2014,
  author    = {Becker, Peter and Kopp, Alexander},
  title     = {Transformationsziel Demokratie : Zivilgesellschaft und Dezentralisierung in Kamerun},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-304-6},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-71883},
  publisher      = {Universit{\"a}t Potsdam},
  pages     = {133},
  year      = {2014},
  abstract  = {Die nachfolgende L{\"a}nderstudie ist w{\"a}hrend eines l{\"a}ngeren Arbeitsaufenthaltes im Rahmen der internationalen Zusammenarbeit in Kamerun entstanden. Mit ihr versuchen wir, unsere pers{\"o}nlichen Eindr{\"u}cke und t{\"a}glichen Beobachtungen in einem Land zu verarbeiten, in dem offenbar alle Hoffnung darauf beruht, dass der alternde Staatspr{\"a}sident Paul Biya seinen Abschied von der politischen B{\"u}hne nimmt und damit ein autokratisches, korruptes Regime sein Ende findet. Diese Hoffnung scheint mit der Erwartung von Francis Fukuyama verbunden zu werden, der 1992 nach dem Zusammenbruch des Sowjet-Imperiums das „Ende der Geschichte" erkl{\"a}rte, in der {\"U}berzeugung, dass das demokratische Gesellschaftsmodell bald {\"u}berall Einzug halten w{\"u}rde. Bekanntlich hat sich diese Erwartung als zu optimistisch erwiesen. Mit unserer Untersuchung versuchen wir aufzuzeigen, warum sich die Hoffnung auf eine gerechtere Gesellschaft trotz langj{\"a}hriger Bem{\"u}hungen westlicher Geber um die St{\"a}rkung der Zivilgesellschaft und die Dezentralisierung staatlicher Aufgaben auch in Kamerun kaum erf{\"u}llen wird. Ein „Ende der Geschichte" l{\"a}sst sich auch f{\"u}r die Zeit nach Paul Biya nicht prognostizieren.},
  language  = {de}
}
@phdthesis{Bergner2003,
  author    = {Bergner, Andreas G. N.},
  title     = {Lake-level fluctuations and Late Quaternary climate change in the Central Kenya Rift},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-0001428},
  school      = {Universit{\"a}t Potsdam},
  year      = {2003},
  abstract  = {Diese Arbeit besch{\"a}ftigt sich mit der Rekonstruktion von Klima in historischen Zeiten im tropischen Ostafrika. Nach einer {\"U}bersicht {\"u}ber die heutigen klimatischen Bedingungen der Tropen und den Besonderheiten des ostafrikanischen Klimas, werden die M{\"o}glichkeiten der Klimarekonstruktion anhand von Seesedimenten diskutiert. Es zeigt sich, dass die hoch gelegenen Seen des Zentralen Keniarifts, als Teil des Ostafrikanischen Grabensystems, besonders geeignete Klimaarchive darstellen, da sie sensibel auf klimatische Ver{\"a}nderungen reagieren. Ver{\"a}nderungen der Seechemie, wie sie in den Sedimenten aufgezeichnet werden, eignen sich um die nat{\"u}rlichen Schwankungen in der Quart{\"a}ren Klimageschichte Ostafrikas nachzuzeichnen. Basierend auf der guten 40Ar/39Ar- und 14C-Datierbarkeit der Seesedimente wird eine Chronologie der pal{\"a}o{\"o}kologischen Bedingungen anhand von Diatomeenvergesellschaftungen restauriert. Dabei zeigen sich f{\"u}r die Seen Nakuru, Elmenteita und Naivasha kurzfristige Transgression/ Regressions-Zyklen im Intervall von ca. 11.000 Jahren w{\"a}hrend des letzten (ca. 12.000 bis 6.000 J.v.H.) und vorletzten Interglazials (ca. 140.000 bis 60.000 J.v.H.). Zus{\"a}tzlich kann ein allgemeiner, langfristiger Trend der Seeentwicklung von großen Frischwasserseen hin zu st{\"a}rker salinen Gew{\"a}ssern innerhalb der letzen 1 Mio. Jahre festgestellt werden. Mittels Transferfunktionen und einem hydro-klimatischen Modellansatz k{\"o}nnen die restaurierten limnologischen Bedingungen als klimatische Schwankungen des Einzugsgebietes interpretiert werden. Wenngleich auch der zus{\"a}tzliche Einfluss von tektonischen Ver{\"a}nderungen auf das Seeeinzugsgebiet und das Gewicht ver{\"a}nderter Grundwasserstr{\"o}me abgewogen werden, zeigt sich, dass allein geringf{\"u}gig erh{\"o}hte Niederschlagswerte von ca. 30±10 \% zu dramatischen Seespiegelanstiegen im Zentralen Keniarift f{\"u}hren. Aufgrund der etablierten hydrrologisch-klimatischen Wechselwirkungen werden R{\"u}ckschl{\"u}sse auf die nat{\"u}rliche Variabilit{\"a}t des ostafrikanischen Klimas gezogen. Zudem wird die Sensitivit{\"a}t der Keniarift-Seen in Bezug auf die St{\"a}rke der {\"a}quatorialen Insolation und hinsichtilch variabler Oberfl{\"a}chenwassertemperaturen des Indischen Ozeans bewertet.},
  language  = {en}
}
@phdthesis{Bibi2018,
  author    = {Bibi, Faysal},
  title     = {Paleoecology and evolution in the Afro-Arabian neogene},
  school      = {Universit{\"a}t Potsdam},
  year      = {2018},
  abstract  = {This cumulative habilitation thesis presents new work on the systematics, paleoecology, and evolution of antelopes and other large mammals, focusing mainly on the late Miocene to Pleistocene terrestrial fossil record of Africa and Arabia. The studies included here range from descriptions of new species to broad-scale analyses of diversification and community evolution in large mammals over millions of years. A uniting theme is the evolution, across both temporal and spatial scales, of the environments and faunas that characterize modern African savannas today. One conclusion of this work is that macroevolutionary changes in large mammals are best characterized at regional (subcontinental to continental) and long-term temporal scales. General views of evolution developed on records that are too restricted in spatial and temporal extent are likely to ascribe too much influence to local or short-lived events. While this distinction in the scale of analysis and interpretation may seem trivial, it is challenging to implement given the geographically and temporally uneven nature of the fossil record, and the difficulties of synthesizing spatially and temporally dispersed datasets. This work attempts to do just that, bringing together primary fossil discoveries from eastern Africa to Arabia, from the Miocene to the Pleistocene, and across a wide range of (mainly large mammal) taxa. The end result is support for hypotheses stressing the impact of both climatic and biotic factors on long-term faunal change, and a more geographically integrated view of evolution in the African fossil record.},
  language  = {en}
}
@misc{Elsenhans2012,
  author    = {Elsenhans, Hartmut},
  title     = {Rentierstaat Algerien : Realit{\"a}t vs. konstruierte Wirklichkeit},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-60463},
  year      = {2012},
  abstract  = {Vor 50 Jahren l{\"o}ste sich Algerien nach langem Kampf endg{\"u}ltig aus dem franz{\"o}sischen Kolonialreich. Die anschließend durchgef{\"u}hrten Wirtschaftsreformen konnten das Land aber nicht befrieden, weil sie keine effektive Nutzung der Rente verwirklichten. Bis heute ist die Wirtschaft des Landes wenig diversifiziert und stark von Erd{\"o}leinnahmen abh{\"a}ngig. Ist eine exportorientierte Industrialisierung als L{\"o}sung der Probleme denkbar?},
  language  = {de}
}
@article{GonzalezFortesTassiTrucchietal.2019,
  author    = {Gonzalez-Fortes, Gloria M. and Tassi, F. and Trucchi, E. and Henneberger, K. and Paijmans, Johanna L. A. and Diez-del-Molino, D. and Schroeder, H. and Susca, R. R. and Barroso-Ruiz, C. and Bermudez, F. J. and Barroso-Medina, C. and Bettencourt, A. M. S. and Sampaio, H. A. and Salas, A. and de Lombera-Hermida, A. and Fabregas Valcarce, Ram{\´o}n and Vaquero, M. and Alonso, S. and Lozano, Marina and Rodriguez-Alvarez, Xose Pedro and Fernandez-Rodriguez, C. and Manica, Andrea and Hofreiter, Michael and Barbujani, Guido},
  title     = {A western route of prehistoric human migration from Africa into the Iberian Peninsula},
  series = {Proceedings of the Royal Society of London : B, Biological sciences},
  volume    = {286},
  journal   = {Proceedings of the Royal Society of London : B, Biological sciences},
  number    = {1895},
  publisher = {Royal Society},
  address   = {London},
  issn      = {0962-8452},
  doi       = {10.1098/rspb.2018.2288},
  pages     = {10},
  year      = {2019},
  abstract  = {Being at the western fringe of Europe, Iberia had a peculiar prehistory and a complex pattern of Neolithization. A few studies, all based on modern populations, reported the presence of DNA of likely African origin in this region, generally concluding it was the result of recent gene flow, probably during the Islamic period. Here, we provide evidence of much older gene flow from Africa to Iberia by sequencing whole genomes from four human remains from northern Portugal and southern Spain dated around 4000 years BP (from the Middle Neolithic to the Bronze Age). We found one of them to carry an unequivocal sub-Saharan mitogenome of most probably West or West-Central African origin, to our knowledge never reported before in prehistoric remains outside Africa. Our analyses of ancient nuclear genomes show small but significant levels of sub-Saharan African affinity in several ancient Iberian samples, which indicates that what we detected was not an occasional individual phenomenon, but an admixture event recognizable at the population level. We interpret this result as evidence of an early migration process from Africa into the Iberian Peninsula through a western route, possibly across the Strait of Gibraltar.},
  language  = {en}
}
@article{HeringHauptfleischKramerSchadtetal.2022,
  author    = {Hering, Robert and Hauptfleisch, Morgan and Kramer-Schadt, Stephanie and Stiegler, Jonas and Blaum, Niels},
  title     = {Effects of fences and fence gaps on the movement behavior of three southern African antelope species},
  series = {Frontiers in Conservation Science},
  volume    = {3},
  journal   = {Frontiers in Conservation Science},
  publisher = {Frontiers},
  address   = {Lausanne, Schweiz},
  issn      = {2673-611X},
  doi       = {10.3389/fcosc.2022.959423},
  pages     = {1 -- 19},
  year      = {2022},
  abstract  = {Globally, migratory ungulates are affected by fences. While field observational studies reveal the amount of animal-fence interactions across taxa, GPS tracking-based studies uncover fence effects on movement patterns and habitat selection. However, studies on the direct effects of fences and fence gaps on movement behavior, especially based on high-frequency tracking data, are scarce. We used GPS tracking on three common African antelopes (Tragelaphus strepsiceros, Antidorcas marsupialis, and T. oryx) with movement strategies ranging from range residency to nomadism in a semi-arid, Namibian savanna traversed by wildlife-proof fences that elephants have regularly breached. We classified major forms of ungulate-fence interaction types on a seasonal and a daily scale. Furthermore, we recorded the distances and times spent at fences regarding the total individual space use. Based on this, we analyzed the direct effects of fences and fence gaps on the animals' movement behavior for the previously defined types of animal-fence interactions. Antelope-fence interactions peaked during the early hours of the day and during seasonal transitions when the limiting resource changed between water and forage. Major types of ungulate-fence interactions were quick, trace-like, or marked by halts. We found that the amount of time spent at fences was highest for nomadic eland. Migratory springbok adjusted their space use concerning fence gap positions. If the small home ranges of sedentary kudu included a fence, they frequently interacted with this fence. For springbok and eland, distance traveled along a fence declined with increasing utilization of a fence gap. All species reduced their speed in the proximity of a fence but often increased their speed when encountering the fence. Crossing a fence led to increased speeds for all species. We demonstrate that fence effects mainly occur during crucial foraging times (seasonal scale) and during times of directed movements (daily scale). Importantly, we provide evidence that fences directly alter antelope movement behaviors with negative implications for energy budgets and that persistent fence gaps can reduce the intensity of such alterations. Our findings help to guide future animal-fence studies and provide insights for wildlife fencing and fence gap planning.},
  language  = {en}
}
@misc{HeringHauptfleischKramerSchadtetal.2022,
  author    = {Hering, Robert and Hauptfleisch, Morgan and Kramer-Schadt, Stephanie and Stiegler, Jonas and Blaum, Niels},
  title     = {Effects of fences and fence gaps on the movement behavior of three southern African antelope species},
  series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {1308},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-58267},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-582672},
  pages     = {19},
  year      = {2022},
  abstract  = {Globally, migratory ungulates are affected by fences. While field observational studies reveal the amount of animal-fence interactions across taxa, GPS tracking-based studies uncover fence effects on movement patterns and habitat selection. However, studies on the direct effects of fences and fence gaps on movement behavior, especially based on high-frequency tracking data, are scarce. We used GPS tracking on three common African antelopes (Tragelaphus strepsiceros, Antidorcas marsupialis, and T. oryx) with movement strategies ranging from range residency to nomadism in a semi-arid, Namibian savanna traversed by wildlife-proof fences that elephants have regularly breached. We classified major forms of ungulate-fence interaction types on a seasonal and a daily scale. Furthermore, we recorded the distances and times spent at fences regarding the total individual space use. Based on this, we analyzed the direct effects of fences and fence gaps on the animals' movement behavior for the previously defined types of animal-fence interactions. Antelope-fence interactions peaked during the early hours of the day and during seasonal transitions when the limiting resource changed between water and forage. Major types of ungulate-fence interactions were quick, trace-like, or marked by halts. We found that the amount of time spent at fences was highest for nomadic eland. Migratory springbok adjusted their space use concerning fence gap positions. If the small home ranges of sedentary kudu included a fence, they frequently interacted with this fence. For springbok and eland, distance traveled along a fence declined with increasing utilization of a fence gap. All species reduced their speed in the proximity of a fence but often increased their speed when encountering the fence. Crossing a fence led to increased speeds for all species. We demonstrate that fence effects mainly occur during crucial foraging times (seasonal scale) and during times of directed movements (daily scale). Importantly, we provide evidence that fences directly alter antelope movement behaviors with negative implications for energy budgets and that persistent fence gaps can reduce the intensity of such alterations. Our findings help to guide future animal-fence studies and provide insights for wildlife fencing and fence gap planning.},
  language  = {en}
}
@article{KalkuhlSchwerhoffWaha2020,
  author    = {Kalkuhl, Matthias and Schwerhoff, Gregor and Waha, Katharina},
  title     = {Land tenure, climate and risk management},
  series = {Ecological economics},
  volume    = {171},
  journal   = {Ecological economics},
  publisher = {Elsevier Science},
  address   = {Amsterdam [u.a.]},
  issn      = {0921-8009},
  doi       = {10.1016/j.ecolecon.2019.106573},
  pages     = {16},
  year      = {2020},
  abstract  = {We analyze to what extent climate conditions affect the prevalence of sharecropping as a form of traditional land tenure. We investigate how sharecropping tenure is related to climate risk and how it interacts with fertilizer use and livestock ownership that both influence production risk. We first develop a stylized theoretical model to illustrate the role of climate for land tenure and production. Our empirical analysis is based on more than 9000 households with considerable heterogeneity in climate conditions across several African countries. We find that farmers in areas with low precipitation are more likely to be sharecroppers. We further find evidence for risk management interaction effects as sharecropping farmers are less likely to own livestock and more likely to use fertilizer. In economies where formal kinds of insurance are unavailable, sharecropping thus functions as a form of insurance and reduces the need for potentially costly risk management strategies.},
  language  = {en}
}
@book{Kaltschew2010,
  author    = {Kaltschew, Kristian},
  title     = {Das politische System Kenias : Autokratie versus Demokratie},
  publisher = {Universit{\"a}tsverlag Potsdam},
  address   = {Potsdam},
  isbn      = {978-3-86956-097-7},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-47947},
  publisher      = {Universit{\"a}t Potsdam},
  pages     = {108},
  year      = {2010},
  abstract  = {Kenia erlangt Anfang der 1960er seine Unabh{\"a}ngigkeit und wird in der Folge von den Pr{\"a}sidenten Kenyatta und sp{\"a}ter Moi autorit{\"a}r regiert. Als Konsequenz des internationalen und nationalen Druckes werden 1991 wieder Mehrparteienwahlen zugelassen. Die Hoffnungen auf einen Trendwechsel werden zun{\"a}chst aber nicht erf{\"u}llt. Pr{\"a}sident Moi bleibt bei den Wahlen 1992 und 1997 siegreich und versucht jeden m{\"o}glichen Reformprozess aufzuhalten bzw. zu verlangsamen. Mit dem neu gew{\"a}hlten Pr{\"a}sidenten Kibaki entsteht 2002 die Hoffnung auf Ver{\"a}nderung. Aber als alter Wegbegleiter Mois erf{\"u}llt Kibaki nicht die internationalen und nationalen Erwartungen. Moi und Kibaki organisieren jeweils kontra-demokratische Eliten hinter sich und nutzen das m{\"a}chtige Pr{\"a}sidentenamt, die st{\"a}rkste Institution im politischen System Kenias, um den Status quo so lange wie m{\"o}glich zu erhalten. Die Parteien werden weder durch die Regierung noch durch die Opposition zu starken Institutionen transformiert und das unstete Verhalten der Geberl{\"a}nder vermag den Einfluss der autorit{\"a}ren F{\"u}hrung nicht dauerhaft einzuschr{\"a}nken.},
  language  = {de}
}
@phdthesis{Kristen2009,
  author    = {Kristen, Iris},
  title     = {Investigations on rainfall variability during the late Quaternary based on geochemical analyses of lake sediments from tropical and subtropical southern Africa},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-32547},
  school      = {Universit{\"a}t Potsdam},
  year      = {2009},
  abstract  = {This thesis presents investigations on sediments from two African lakes which have been recording changes in their surrounding environmental and climate conditions since more than 200,000 years. Focus of this work is the time of the last Glacial and the Holocene (the last ~100,000 years before present [in the following 100 kyr BP]). One important precondition for this kind of research is a good understanding of the present ecosystems in and around the lakes and of the sediment formation under modern climate conditions. Both studies therefore include investigations on the modern environment (including organisms, soils, rocks, lake water and sediments). A 90 m long sediment sequence was investigated from Lake Tswaing (north-eastern South Africa) using geochemical analyses. These investigations document alternating periods of high detrital input and low (especially autochthonous) organic matter content and periods of low detrital input, carbonatic or evaporitic sedimentation and high autochthonous organic matter content. These alternations are interpreted as changes between relatively humid and arid conditions, respectively. Before c. 75 kyr BP, they seem to follow changes in local insolation whereas afterwards they appear to be acyclic and are probably caused by changes in ocean circulation and/or in the mean position of the Inter-Tropical Convergence Zone (ITCZ). Today, these factors have main influence on precipitation in this area where rainfall occurs almost exclusively during austral summer. All modern organisms were analysed for their biomarker and bulk organic and compound-specific stable carbon isotope composition. The same investigations on sediments from the modern lake floor document the mixed input of the investigated individual organisms and reveal additional influences by methanotrophic bacteria. A comparison of modern sediment characteristics with those of sediments covering the time 14 to 2 kyr BP shows changes in the productivity of the lake and the surrounding vegetation which are best explained by changes in hydrology. More humid conditions are indicated for times older than 10 kyr BP and younger than 7.5 kyr BP, whereas arid conditions prevailed in between. These observations agree with the results from sediment composition and indications from other climate archives nearby. The second lake study deals with Lake Challa, a small, deep crater lake on the foot of Mount Kilimanjaro. In this lake form mm-scale laminated sediments which were analyses with micro-XRF scanning for changes in the element composition. By comparing these results with investigations on thin sections, results from ongoing sediment trap studies, meteorological data, and investigations on the surrounding rocks and soils, I develop a model for seasonal variability in the limnology and sedimentation of Lake Challa. The lake appears to be stratified during the warm rain seasons (October - December and March - May) during which detrital material is delivered to the lake and carbonates precipitate. On the lake floor forms a dark lamina with high contents of Fe and Ti and high Ca/Al and low Mn/Fe ratios. Diatoms bloom during the cool and windy season (June - September) when mixing down to c. 60 m depth provides easily bio-available nutrients. Contemporaneously, Fe and Mn-oxides are precipitating which cause high Mn/Fe ratios in the light diatom-rich laminae of the sediments. Trends in the Mn/Fe ratio of the sediments are interpreted to reflect changes in the intensity or duration of seasonal mixing in Lake Challa. This interpretation is supported by parallel changes in the organic matter and biogenic silica content observed in the 22 m long profile recovered from Lake Challa. This covers the time of the last 25 kyr BP. It documents a transition around 16 kyr BP from relatively well-mixed conditions with high detrital input during glacial times to stronger stratified conditions which are probably related to increasing lake levels in Challa and generally more humid conditions in East Africa. Intensified mixing is recorded for the time of the Younger Dryas and the period between 11.4 and 10.7 kyr BP. For these periods, reduced intensity of the SW monsoon and intensified NE monsoon are reported from archives of the Indian-Asian Monsoon region, arguing for the latter as a probable source for wind mixing in Lake Challa. This connection is probably also responsible for contemporaneous events in the Mn/Fe ratios of the Lake Challa sediments and in other records of northern hemisphere monsoon intensity during the Holocene and underlines the close interaction of global low latitude atmospheric circulation.},
  language  = {en}
}
@techreport{LudolphŠedova2021,
  type      = {Working Paper},
  author    = {Ludolph, Lars and Šedov{\´a}, Barbora},
  title     = {Global food prices, local weather and migration in Sub-Saharan Africa},
  series = {CEPA Discussion Papers},
  journal   = {CEPA Discussion Papers},
  number    = {26},
  issn      = {2628-653X},
  doi       = {10.25932/publishup-49494},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-494946},
  pages     = {53},
  year      = {2021},
  abstract  = {In this paper, we study the effect of exogenous global crop price changes on migration from agricultural and non-agricultural households in Sub-Saharan Africa. We show that, similar to the effect of positive local weather shocks, the effect of a locally-relevant global crop price increase on household out-migration depends on the initial household wealth. Higher international producer prices relax the budget constraint of poor agricultural households and facilitate migration. The order of magnitude of a standardized price effect is approx. one third of the standardized effect of a local weather shock. Unlike positive weather shocks, which mostly facilitate internal rural-urban migration, positive income shocks through rising producer prices only increase migration to neighboring African countries, likely due to the simultaneous decrease in real income in nearby urban areas. Finally, we show that while higher producer prices induce conflict, conflict does not play a role for the household decision to send a member as a labor migrant.},
  language  = {en}
}
@misc{Martin2010,
  author    = {Martin, Paul},
  title     = {Afrika im 21. Jahrhundert : eine zu schreibende Erfolgsgeschichte},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-46446},
  year      = {2010},
  abstract  = {Afrika hat seinen berechtigten Platz auf der Weltb{\"u}hne noch nicht gefunden. Ein wichtiger Grund daf{\"u}r besteht darin, dass afrikanische Regierungen - im Gegensatz zu denen Chinas, Indiens, Brasiliens oder Indonesiens - nicht jene Maßnahmen ergriffen haben, die f{\"u}r das Entstehen eines Mittelstandes aus dem Gemenge von Millionen Armen wichtig sind.},
  language  = {de}
}
@misc{Mkandawire2014,
  author    = {Mkandawire, Thandika},
  title     = {The death of Mandela and Africa's liberation struggle},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-69964},
  year      = {2014},
  abstract  = {The name Mandela became first inscribed in the annals of African liberation as nothing particularly unusual at the time. The late fifties was an era of trials and detentions in the colonies. The Treason Trial, which took place from 1956 to 1961, was closely followed by those of my generation largely through Drum Magazine.},
  language  = {en}
}
@article{MtilatilaBronstertVormoor2022,
  author    = {Mtilatila, Lucy Mphatso Ng'ombe and Bronstert, Axel and Vormoor, Klaus Josef},
  title     = {Temporal evaluation and projections of meteorological droughts in the Greater Lake Malawi Basin, Southeast Africa},
  series = {Frontiers in water},
  volume    = {4},
  journal   = {Frontiers in water},
  publisher = {Frontiers Media},
  address   = {Lausanne},
  issn      = {2624-9375},
  doi       = {10.3389/frwa.2022.1041452},
  pages     = {16},
  year      = {2022},
  abstract  = {The study examined the potential future changes of drought characteristics in the Greater Lake Malawi Basin in Southeast Africa. This region strongly depends on water resources to generate electricity and food. Future projections (considering both moderate and high emission scenarios) of temperature and precipitation from an ensemble of 16 bias-corrected climate model combinations were blended with a scenario-neutral response surface approach to analyses changes in: (i) the meteorological conditions, (ii) the meteorological water balance, and (iii) selected drought characteristics such as drought intensity, drought months, and drought events, which were derived from the Standardized Precipitation and Evapotranspiration Index. Changes were analyzed for a near-term (2021-2050) and far-term period (2071-2100) with reference to 1976-2005. The effect of bias-correction (i.e., empirical quantile mapping) on the ability of the climate model ensemble to reproduce observed drought characteristics as compared to raw climate projections was also investigated. Results suggest that the bias-correction improves the climate models in terms of reproducing temperature and precipitation statistics but not drought characteristics. Still, despite the differences in the internal structures and uncertainties that exist among the climate models, they all agree on an increase of meteorological droughts in the future in terms of higher drought intensity and longer events. Drought intensity is projected to increase between +25 and +50\% during 2021-2050 and between +131 and +388\% during 2071-2100. This translates into +3 to +5, and +7 to +8 more drought months per year during both periods, respectively. With longer lasting drought events, the number of drought events decreases. Projected droughts based on the high emission scenario are 1.7 times more severe than droughts based on the moderate scenario. That means that droughts in this region will likely become more severe in the coming decades. Despite the inherent high uncertainties of climate projections, the results provide a basis in planning and (water-)managing activities for climate change adaptation measures in Malawi. This is of particular relevance for water management issues referring hydro power generation and food production, both for rain-fed and irrigated agriculture.},
  language  = {en}
}
@article{NeiberKahlWiggeringetal.2019,
  author    = {Neiber, Marco Thomas and Kahl, Sandra M. and Wiggering, Benedikt and Glaubrecht, Matthias},
  title     = {Adding the West-African riverine component},
  series = {Zootaxa : an international journal of zootaxonomy ; a rapid international journal for animal taxonomists},
  volume    = {4674},
  journal   = {Zootaxa : an international journal of zootaxonomy ; a rapid international journal for animal taxonomists},
  number    = {3},
  publisher = {Magnolia Press},
  address   = {Auckland},
  issn      = {1175-5326},
  doi       = {10.11646/zootaxa.4674.3.1},
  pages     = {301 -- 328},
  year      = {2019},
  abstract  = {While Africa's lacustrine gastropod fauna, in particular of Lake Tanganyika, has received much attention, the continent's riverine malacofauna has long been neglected. Pseudocleopatra is a relatively poorly known paludomid gastropod genus with species found throughout the lower reaches of the West African Volta and Congo rivers. In the course of ongoing systematic revisions of African paludomids, we present here a morphometric analysis and revision of the recent species assigned to the genus, i.e., P. togoensis, P. voltana, P. dartevellei and P. bennikei, to improve taxonomic acuity for this group. We use available museum material for geometric morphometrics, multivariate ratio analysis and comparisons of radular and opercular characters. Our results demonstrate that the four recent species of Pseudocleopatra are clearly distinguishable on the basis of ratios of shell measurements as well as radular and opercular characters. Pseudocleopatra has generic-level synapomorphies including: concentric opercula with relatively large paucispiral nuclei, and rachidian radular teeth with usually 13-20 cusps. On the basis of this characterisation, the nominal species Cleopatra broecki is transferred to Pseudocleopatra. Additionally, the nominal taxon P. bennikei is synonymized with P. broecki n. comb. The phylogenetic relationships of Pseudocleopatra are currently unknown, but the observed tendency of some fossil taxa assigned to Pseudocleopatra towards thalassoidism, i.e., the resemblance to marine gastropods, has led to the hypothesis that some of the thalassoid endemics in Lake Tanganyika may have originated from or be related to Pseudocleopatra. Should this hypothesis be correct, which is in need of testing by molecular genetic methods when suitable samples become available, Pseudocleopatra may play a crucial role in understanding of the evolution of thalassoidism in African Paludomidae.},
  language  = {en}
}
@misc{ReinhardtLierschAbdeladhimetal.2018,
  author    = {Reinhardt, Julia and Liersch, Stefan and Abdeladhim, Mohamed Arbi and Diallo, Mori and Dickens, Chris and Fournet, Samuel and Hattermann, Fred Fokko and Kabaseke, Clovis and Muhumuza, Moses and Mul, Marloes L. and Pilz, Tobias and Otto, Ilona M. and Walz, Ariane},
  title     = {Systematic evaluation of scenario assessments supporting sustainable integrated natural resources management},
  series = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Postprints der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {930},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-44578},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-445784},
  pages     = {36},
  year      = {2018},
  abstract  = {Scenarios have become a key tool for supporting sustainability research on regional and global change. In this study we evaluate four regional scenario assessments: first, to explore a number of research challenges related to sustainability science and, second, to contribute to sustainability research in the specific case studies. The four case studies used commonly applied scenario approaches that are (i) a story and simulation approach with stakeholder participation in the Oum Zessar watershed, Tunisia, (ii) a participatory scenario exploration in the Rwenzori region, Uganda, (iii) a model-based prepolicy study in the Inner Niger Delta, Mali, and (iv) a model coupling-based scenario analysis in upper Thukela basin, South Africa. The scenario assessments are evaluated against a set of known challenges in sustainability science, with each challenge represented by two indicators, complemented by a survey carried out on the perception of the scenario assessments within the case study regions. The results show that all types of scenario assessments address many sustainability challenges, but that the more complex ones based on story and simulation and model coupling are the most comprehensive. The study highlights the need to investigate abrupt system changes as well as governmental and political factors as important sources of uncertainty. For an in-depth analysis of these issues, the use of qualitative approaches and an active engagement of local stakeholders are suggested. Studying ecological thresholds for the regional scale is recommended to support research on regional sustainability. The evaluation of the scenario processes and outcomes by local researchers indicates the most transparent scenario assessments as the most useful. Focused, straightforward, yet iterative scenario assessments can be very relevant by contributing information to selected sustainability problems.},
  language  = {en}
}
@article{ReinhardtLierschAbdeladhimetal.2018,
  author    = {Reinhardt, Julia and Liersch, Stefan and Abdeladhim, Mohamed Arbi and Diallo, Mori and Dickens, Chris and Fournet, Samuel and Hattermann, Fred Fokko and Kabaseke, Clovis and Muhumuza, Moses and Mul, Marloes L. and Pilz, Tobias and Otto, Ilona M. and Walz, Ariane},
  title     = {Systematic evaluation of scenario assessments supporting sustainable integrated natural resources management},
  series = {Ecology and society : a journal of integrative science for resilience and sustainability},
  volume    = {23},
  journal   = {Ecology and society : a journal of integrative science for resilience and sustainability},
  number    = {1},
  publisher = {Resilience Alliance},
  address   = {Wolfville},
  issn      = {1708-3087},
  doi       = {10.5751/ES-09728-230105},
  pages     = {34},
  year      = {2018},
  abstract  = {Scenarios have become a key tool for supporting sustainability research on regional and global change. In this study we evaluate four regional scenario assessments: first, to explore a number of research challenges related to sustainability science and, second, to contribute to sustainability research in the specific case studies. The four case studies used commonly applied scenario approaches that are (i) a story and simulation approach with stakeholder participation in the Oum Zessar watershed, Tunisia, (ii) a participatory scenario exploration in the Rwenzori region, Uganda, (iii) a model-based prepolicy study in the Inner Niger Delta, Mali, and (iv) a model coupling-based scenario analysis in upper Thukela basin, South Africa. The scenario assessments are evaluated against a set of known challenges in sustainability science, with each challenge represented by two indicators, complemented by a survey carried out on the perception of the scenario assessments within the case study regions. The results show that all types of scenario assessments address many sustainability challenges, but that the more complex ones based on story and simulation and model coupling are the most comprehensive. The study highlights the need to investigate abrupt system changes as well as governmental and political factors as important sources of uncertainty. For an in-depth analysis of these issues, the use of qualitative approaches and an active engagement of local stakeholders are suggested. Studying ecological thresholds for the regional scale is recommended to support research on regional sustainability. The evaluation of the scenario processes and outcomes by local researchers indicates the most transparent scenario assessments as the most useful. Focused, straightforward, yet iterative scenario assessments can be very relevant by contributing information to selected sustainability problems.},
  language  = {en}
}
@misc{SabrowKanyeihamba2009,
  author    = {Sabrow, Sophia and Kanyeihamba, George W.},
  title     = {Menschenrechte auch in Afrika! : WT-Interview mit dem ugandischen Richter George W. Kanyeihamba},
  issn      = {0944-8101},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-33957},
  year      = {2009},
  abstract  = {Im Rahmen der allj{\"a}hrlichen Potsdamer Fr{\"u}hjahrsgespr{\"a}che, die die Stiftung Entwicklung und Frieden in Kooperation mit WeltTrends durchf{\"u}hrt, hatten wir Gelegenheit zu einem Gespr{\"a}ch mit dem ehemaligen Richter am Afrikanischen Gerichtshof f{\"u}r Menschenrechte und die Rechte der V{\"o}lker, George W. Kanyeihamba aus Uganda.},
  language  = {de}
}
@phdthesis{Waha2012,
  author    = {Waha, Katharina},
  title     = {Climate change impacts on agricultural vegetation in sub-Saharan Africa},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-64717},
  school      = {Universit{\"a}t Potsdam},
  year      = {2012},
  abstract  = {Agriculture is one of the most important human activities providing food and more agricultural goods for seven billion people around the world and is of special importance in sub-Saharan Africa. The majority of people depends on the agricultural sector for their livelihoods and will suffer from negative climate change impacts on agriculture until the middle and end of the 21st century, even more if weak governments, economic crises or violent conflicts endanger the countries' food security. The impact of temperature increases and changing precipitation patterns on agricultural vegetation motivated this thesis in the first place. Analyzing the potentials of reducing negative climate change impacts by adapting crop management to changing climate is a second objective of the thesis. As a precondition for simulating climate change impacts on agricultural crops with a global crop model first the timing of sowing in the tropics was improved and validated as this is an important factor determining the length and timing of the crops´ development phases, the occurrence of water stress and final crop yield. Crop yields are projected to decline in most regions which is evident from the results of this thesis, but the uncertainties that exist in climate projections and in the efficiency of adaptation options because of political, economical or institutional obstacles have to be considered. The effect of temperature increases and changing precipitation patterns on crop yields can be analyzed separately and varies in space across the continent. Southern Africa is clearly the region most susceptible to climate change, especially to precipitation changes. The Sahel north of 13° N and parts of Eastern Africa with short growing seasons below 120 days and limited wet season precipitation of less than 500 mm are also vulnerable to precipitation changes while in most other part of East and Central Africa, in contrast, the effect of temperature increase on crops overbalances the precipitation effect and is most pronounced in a band stretching from Angola to Ethiopia in the 2060s. The results of this thesis confirm the findings from previous studies on the magnitude of climate change impact on crops in sub-Saharan Africa but beyond that helps to understand the drivers of these changes and the potential of certain management strategies for adaptation in more detail. Crop yield changes depend on the initial growing conditions, on the magnitude of climate change, and on the crop, cropping system and adaptive capacity of African farmers which is only now evident from this comprehensive study for sub-Saharan Africa. Furthermore this study improves the representation of tropical cropping systems in a global crop model and considers the major food crops cultivated in sub-Saharan Africa and climate change impacts throughout the continent.},
  language  = {en}
}