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The environmental setting within the Central Sahara was subject to considerable changes during Late Quaternary, mainly driven by major global climate variations, although human impact increased constantly since Early Holocene.Such global events can be reconstructed with the help of reliefs, sediments and palaeosoils and their specific morphological
This book describes the Central Sahara region, bringing together an unprecedented combination of diverse and often historic research published in different languages in order to describe its varied landscapes and landforms. The Central Sahara region consists of Libya, Algeria, Mali, Niger and Chad, countries that share similar landscape histories and common landscape traits, including massifs, sand seas, paleowater features and large depressions. Furthermore, human settlement of this region goes hand-in-hand with climate and environmental changes and landscape evolution during the Holocene and earlier; hence, Central Saharan landscapes and landforms provide valuable insights into landscape–human relationships over long timescales. The book offers a comprehensive yet accessible reference source, drawing on both past and present interdisciplinary research and gathering the insights of authors from many different countries to explore a region that has largely been overlooked in available literature.
This book is the result of the work of the first international congress of the ArabGU (Arabian Geosciences Union) which took place in Algiers (Algeria) in February 2016. It presents research articles and review papers on geology of the North Africa and Arabian Middle East . It provides information to the public on various fields of earth sciences and encourages further research in this field in order to attract an international audience.
The Sahara-Sahel borderland occupies a critical geographical position due to its recurrent latitudinal shifts, continually having a strong impact on humans, animals and plants. Gobero is located at the southern limits of the present Sahara, in Niger. The archaeological record at this site encompasses the re-occupation of the Sahara ca 10,000 years ago until approximately 2000 years ago. During this long period, Gobero witnessed significant fluctuations in climate and water resource availability that resulted in cycles of human occupation, abandonment and re-occupation around a natural basin occupied by a palaeolake, until desertification became an irreversible process and the area turned into a no-return frontier for its occupants. This book presents the archaeological, anthropological and environmental data collected during the 2005 and 2006 field seasons at Gobero. Various factors highlight the extraordinary significance of this site. Thanks to its geographical position, straddling the ancient shifting border(s) of the Sahara and the Sahel, the Gobero's archaeological record reveals critical population movements in this part of Africa and different economic and technological strategies its inhabitants employed to adapt to changing environmental conditions. The presence of both settlement and burial features at Gobero gives a comprehensive view of the cultural, social, economic and funerary traditions of the people who lived and died at this site during almost the entire Holocene. The results from these archaeological investigations provide a term of reference for future research and interpretations of past human occupations in the Sahara, as well as North and West Africa.
This book explores the archaeology of the Acacus massif and surrounding areas in southwestern Libya over approximately 2500 years of the Early Holocene, utilising fresh theoretical approaches and new explanations of the social and cultural processes of the area. Archaeological and rock art evidence, much of which is unpublished until now, is used to explore the crucial period that encompasses the onset of the “Green Sahara” to the introduction of domestic livestock. It provides a basis for understanding the original cultural and social developments of hunter-gatherers and foragers of the central ranges of the Sahara. The work also bears upon the wider area informing the reconstruction of the environment and cultural dynamics and stands as key reference point for the larger Sahara and North Africa. The book, rich in illustrations, provides a critical synthesis and overview of the developments of central Saharan archaeology within the broader African framework. The book is invaluable to archaeologists, palaeoenvironmental scientists, and rock art researchers working on the Sahara and North Africa and as comparative work for researchers in African archaeology in general.
Volume 32 (2013) of the internationally recognized and acclaimed yearbook series ‘Palaeoecology of Africa’ publishes 9 new interdisciplinary scientific papers on former and recent landscape evolution and on past environments of the African continent (e.g. climate change, vegetation dynamics and growing impact of humans on ecosystems). These papers expand horizons and interconnections to various types and methodologies of research on environmental dynamics from the Pliocene up to the present: review articles and regional case studies cover Nigeria, Cameroon, selected areas of the Congo basin, Kenya, Malawi, Namibia and South Africa. This volume also gives space to researchers from Africa to present their findings to a wider international audience. Today, by growing awareness of the worldwide impact of Global Change, it has become obvious that aside of the northern and southern hemisphere Polar region also the environmental setting in Africa was subject to considerable changes over time. Natural shifts in climate at least since the Pliocene have caused repeated and strong modification in the area dynamics of ecosystems located in lower latitudes. By a variety of so-called ‘proxies’ – researched and applied by the different authors from numerous disciplines – an attempt is made to reconstruct the evolution of landscapes over space and time. Besides such spatio-temporal oscillations in forested and savanna areas of Africa this volume of ‘Palaeoecology of Africa’ also focuses on possible relationships between environmental change and human impact, also on the perception of this phenomenon of recent ‘climate changes’ by different stakeholders. This book will be of interest to all concerned with low latitudes ecosystem changes and their respective interpretation in the framework of natural climate and vegetation change evidenced by a variety of methods that allow us to read and learn from ‘proxy data’ archives. Archaeologists, Palynologists, Palaeobotanist, Geographers, Geologists and Geomorphologists will find this edition equally useful for their work.
This book presents different perspectives on how to understand the complex interaction between plants and the environment. Plant communities adapt to biotic and abiotic stresses with different mechanisms and understanding these phenomena provides the means to better manage our environment and to cultivate crops that better serve our needs.
Niger is sand, light, and heat. Starting from the necessity of the Mission Catholique du Dosso, which has worked in Niger for several years, this book speaks about the Nigerien situation which is characterized by a countrywide spread of poverty. Along with studying the country’s environmental, geographical conditions, the book discusses raw earth architecture in both vernacular and contemporary contexts. A number of the most common techniques are described. The possibilities for these methods to adapt to the contemporary language of architecture without losing the technical and physical benefits inherent in them are illustrated. The book embraces some topics that are not common but highly relevant in the Developing World, such as identity through the evolution of architecture and the value of transmitting knowledge related to the vernacular building process. Nowadays, Niger’s condition is characterized by a lack of resources, both physical and cultural. Earthen technology appears to be a valid solution in this situation for the creation of an environmentally sustainable approach. The book aims to provide an overview of the possibility of constructing new buildings related to the climate and traditional context, applying vernacular technology and solutions in a contemporary application. Providing a balance between teaching vernacular knowledge and the contemporary architectural language could help face this out-of-resource situation, aiming to get comfortable and affordable living spaces.
During the Neogene – covering the last 23 Million years – the evolution of the environmental setting in Africa was subject to considerable changes. Natural shifts, slow and rapid, evidenced by modifications in palaeogeography, geodynamics, climate, and vegetation have caused repeated and strong changes of ecosystems in the lower latitudes. Using a variety of proxy data – researched and applied by many authors from numerous disciplines – an attempt is made to reconstruct African landscapes over space and time. Besides such spatio-temporal oscillations in recently humid, semi-humid, and dry areas of Africa, this volume of Palaeoecology of Africa (PoA) focuses on long term interrelationships between ecosystem dynamics and climate change, not ignoring the ever growing and ongoing influence of humans on natural ecosystems since the Quaternary. Regionally, this volume lays a strong focus on Nigeria (Niger Delta). Facing the omnipresent challenges of Global Change, an increasing number of African scientists is involved in palaeoenvironmental and palaeoclimatic research, both theoretical and applied. PoA systematically supports established as well as junior African scientists in the field of sustainable cooperation and academic capacity building. This book will be of interest to all concerned with or interested in up-to-date research on Neogene to Quaternary low latitudes ecosystem changes and their respective interpretation in the framework of natural climate and vegetation change evidenced by a variety of methods that allow to read and learn from the past by following the motto, "The geologic foretime as the key to the present, and possibly to the future." Palynologists, Geologists, Geographers, Archaeologists, and Geomorphologists will find this edition equally useful for their work.
This book celebrates the relaunch of the African Pollen Database, presents state-of-the-art of modern and ancient pollen data from sub-Saharan Africa, and promotes Open Access science. Pollen grains are powerful tools for the study of past vegetation dynamics because they preserve well within sedimentary deposits and have a huge diversity in ornamentation that allows different taxa to be determined. The reconstruction of past vegetation from the examination of ancient pollen records thus can be used to characterize the nature of past landscapes (e.g. abundance of forests vs. grasslands), provide insights into changes in biodiversity, and gain empirical evidence of vegetation response to climatic change and human activity. In this, the 35th Volume of "Palaeoecology of Africa", we bring together new data and extensive synthetic reviews to provide novel insights into the relationships between human evolution, human activity, climate change and vegetation dynamics during the Quaternary, the last 2.6 million years. Current and ongoing climate and land-use change is exerting pressure on modern vegetation formations and threatening the livelihoods and wellbeing of many peoples in Africa. In this book the focus is on the Quaternary because it is during this geological period that the modern vegetation formations developed into their current configurations against a backdrop of high magnitude global climate change (glacial-interglacial cycles), human evolution, and a growing human land-use footprint. In this book the latest information is presented and collated from around the African continent to parameterize past vegetation states, identify the drivers of vegetation change, and assess the vegetation resilience to change. To achieve this research from two broad themes are covered: (i) the present is the key to the past (i.e. studies which improve our understanding of modern environments so that we can better interpret evidence from the past), and (ii) the past is the key to the future (i.e. studies which unlock information on how and why vegetation changed in the past so one can better anticipate trajectories of future change). This Open Access book will provide a strong foundation for future research exploring past ecological, environmental and climatic change within Africa and the surrounding islands. The book is organized regionally (covering western, eastern, central, and southern Africa) and it contains specialized articles focused on particular topics (such as modern pollen-vegetation relationships and fire as a driver of vegetation change), as well as regional and pan-African syntheses drawing together decades of research to assess key scientific questions (including the role of climate in driving vegetation change and the role of vegetation change in human evolution). These articles will be useful to students and teachers from high school to the highest level of university who are interested in the origins and dynamics of vegetation in Africa. Furthermore, it is also meant to provide societally relevant information that can act as an inspiration for the development of sustainable management practices for the future.