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Where rainfall is meagre and unpredictable, temperatures fluctuate between extreme hot and cold, and food is scarce, it seems that little can survive.
For generations, the deserts of southern Africa have intrigued scientists and travellers alike. Seemingly barren wastes, they in fact teem with life – from ants to elephants, stone plants to the curious welwitschia, dainty dik-diks to towering gemsbok, and cart-wheeling spiders to fog-basking beetles. How do they cope with scarce resources, unpredictable rainfall and extreme temperatures? How do they protect themselves against predators? And what is the impact of climate change on these life forms and their habitats? Drawing on an earlier edition, published in 1993, biologist Barry Lovegrove answers these questions and unravels many of the mysteries associated with life in the desert. He describes the four arid biomes of South Africa, Namibia and Botswana – Desert, Arid Savanna, Succulent Karoo and Nama-Karoo – and explains how and why such a great diversity of plants, insects, mammals, reptiles and birds successfully exist in these regions. The text is supported by the most recent research, spectacular photographs, and explanatory diagrams and maps. The Living Deserts of Southern Africa is a compelling, in-depth read that is accessible to both the serious student and academic as well as the interested nature lover. Sales points: A fully revised and updated edition of a classic text (1993) on southern Africa’s desert zones; highly readable, entertaining and informative that draws on the latest scientific research; covers the desert regions of South Africa, Namibia and Botswana; stunning full-colour photographs support the text.
The exigencies of life in the desert environment have resulted in the se lection of a diversity of adaptations, both morphological and physiologi cal, in the flora and fauna. At the same time, many plants and most small animals are able not merely to exist but even to thrive under desert conditions - mainly by avoiding thermal extremes and by the refine ment of pre-existing abilities to economise in water. In the same way, the biotic interactions of the flora and fauna of the desert do not involve many new principles. Nevertheless, conditions in arid regions frequently do invoke refinements of the complex interrelations between predators and their prey, parasites and their hosts, as well as between herbivores and the plants upon which they feed. In this book, I shall discuss not only such interactions and their feedback effects, but also community processes and population dynamics in the desert. The physical conditions of the desert that principally affect predators and their prey are its openness and the paucity of cover. This is re stricted to scattered plants, occasional rocks, holes, and crevices in the ground. Furthermore, nightfall does not confer relative invisibility, as it does in many other ecobiomes, because of the clarity of the atmosphere. The bright starlight of the desert renders nearby objects visible even to the human eye, while an incandescent moon bathes the empty landscape with a flood of silver light. Consequently, adaptive coloration is func tional at all hours of the day and night.
Encyclopedia of Deserts represents a milestone: it is the first comprehensive reference to the first comprehensive reference to deserts and semideserts of the world. Approximately seven hundred entries treat subjects ranging from desert survival to the way deserts are formed. Topics include biology (birds, mammals, reptiles, amphibians, fishes, invertebrates, plants, bacteria, physiology, evolution), geography, climatology, geology, hydrology, anthropology, and history. The thirty-seven contributors, including volume editor Michael A. Mares, have had extensive careers in deserts research, encompassing all of the world’s arid and semiarid regions. The Encyclopedia opens with a subject list by topic, an organizational guide that helps the reader grasp interrelationships and complexities in desert systems. Each entry concludes with cross-references to other entries in the volume, inviting the reader to embark on a personal expedition into fascinating, previously unknown terrain. In addition a list of important readings facilitates in-depth study of each topic. An exhaustive index permits quick access to places, topics, and taxonomic listings of all plants and animals discussed. More than one hundred photographs, drawings, and maps enhance our appreciation of the remarkable life, landforms, history, and challenges of the world’s arid land.
Namaqualand – a desert of succulents. From dwarf species barely a few millimetres tall to trees several metres high, the range of succulent plants in this seemingly desolate region is unrivalled in both its extent and its variety of forms. Tiny plants that resemble flowering stones dot a plain of quartz; a minute 'garden' fills a rock crevice; an exuberant burst of vygies colours a patch of veld. About a third of the 3000 or so plant species in Namaqualand are succulents, and they include the largest concentration of miniature succulent species in the world. But there is much more. Namaqualand's bulb flora is the richest of any arid region on earth: amaryllids, irids, lilies and many more, all presenting an astonishing diversity of colour and form. Add to these the spectacular vistas of spring-flowering annuals for which Namaqualand is most famous, and the result is a truly remarkable flora, unrivalled elsewhere on earth. Yet for many years it has been overshadowed by the Cape Floral Kingdom to the south. In this exploration of a harsh wonderland, Richard Cowling and Shirley Pierce embark on redressing the balance, and in doing so discover climatic and other factors that have contributed to Namaqualand's rich flora. They reveal intriguing details of how plants survive a range of adverse conditions and, following the cycle of seasons, they highlight extraordinary facets of the plants' reproduction, including intricate relationships with insect pollinators. Complementing the text, Colin Paterson-Jones's magnificent photographs capture the vibrant colours of Namaqualand's flora, in both panorama and detail conveying the essence of this awe-inspiring land.
This book is part of the Sabkha Ecosystems series. The series is designed to provide information on sabkha ecosystems of different regions. It will add to the collective knowledge available about saline ecosystems and also focuses on the African region where only limited information is currently available on.
This edited collection examines contemporary directions in geographical research on South Africa. It encompasses a cross section of selected themes of critical importance not only to the discipline of Geography in South Africa, but also of relevance to other areas of the Global South. All chapters are original contributions, providing a state of the art research baseline on key themes in physical, human and environmental geography, and in understanding the changing geographical landscapes of modern South Africa. These contributions set the scene for an understanding of the relationships between modern South Africa and the wider contemporary world, including issues of sustainable development and growth in the Global South.
Most people, when they contemplate the living world, conclude that it is a designed place. So it is jarring when biologists come along and say this is all wrong. What most people see as design, they say--purposeful, directed, even intelligent--is only an illusion, something cooked up in a mind that is eager to see purpose where none exists. In these days of increasingly assertive challenges to Darwinism, the question becomes acute: is our perception of design simply a mental figment, or is there something deeper at work? Physiologist Scott Turner argues eloquently and convincingly that the apparent design we see in the living world only makes sense when we add to Darwin's towering achievement the dimension that much modern molecular biology has left on the gene-splicing floor: the dynamic interaction between living organisms and their environment. Only when we add environmental physiology to natural selection can we begin to understand the beautiful fit between the form life takes and how life works. In The Tinkerer's Accomplice, Scott Turner takes up the question of design as a very real problem in biology; his solution poses challenges to all sides in this critical debate.