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This 1998 volume challenges the validity of the dynamic equilibrium concept for tropical forests.
Isolation, extinction, conservation, biodiversity, hotspots.
This book is about ideas on the nature and causes of temporal change in the species composition of vegetation. In particular it examines the diverse processes of inter action of plants with their environment, and with one another, through which the species composition of vegetation becomes established. The first chapter considers the general nature of vegetation and the ways in which vegetation change is perceived by ecologists. Chapters 2 and 3 provide essential background about the relationships between plants and their abiotic and biotic environment. Anyone who is familiar with the fundamentals of plant ecology may prefer to pass over Chapters 2 and 3 which, of necessity, cover their subject matter very briefly. Sequences of development of vegetation on new volcanic rocks, sand dunes and glacial deposits, respectively, are outlined in Chapters 4, 5 and 6. Chapter 7 is about the patterns of vegetation change which occur in severe habitats around the world, and Chapter 8 discusses wetlands. Chapter 9 discusses the diverse responses of temperate forests to a variety of disturbing influences, and Chapter 10 deals with change in the species-rich forests of the Tropics. Chapter 11 treats, in detail, the empirical and inferential data on the biological processes occurring during vegetation change sequences. Chapter 12 considers the plant community phenomena which are implicated in the development of theory about vegetation change. The final chapter, Chapter 13, draws the diverse themes together into a unified theoretical structure by which the vegetation change phenomena may be understood.
Dramatic eye-witness accounts of the world's most violent and destructive volcanic eruption, in the Dutch East Indies in 1883.
Most people have memories of playing on well-manicured lawns or running across the flat green surface of a local park, but we often don’t think of grasses as something we consume. Indeed, grasses include four species—wheat, rice, maize, and sugar—that provide sixty percent of human calorie intake, and we become more and more dependent on these as the world’s population increases. In this book, Stephen Harris explains the history of our relationship with these vital plants from the end of the last Ice Age to the present day. Combining biology, sociology, and cultural history, Grasses explores how these staple crops bear the mark of human influence more visibly than any other plant and how we, in turn, are motivated to protect green space such as public parks. Harris describes this symbiotic connection against the background of climate change, contending that humans must find a way to balance their need for grass as food, as living space, and potentially even as fuel. Providing an impressive exploration of the profound impact these plants have on our survival and our pleasure, this well-illustrated book is a must have for gardeners, foodies, and environmentalists.
Nine months after the explosion, a French expedition searching for signs of life discovered a single spider that had crossed to the island on a balloon of silk. Life had returned to Krakatau. Scientists have been studying the island ever since.