Tropical climates, which occur between 23°30'N and S latitude (Jacob 1988), encompass a wide variety of plant communities (Hartshorn 1983, 1988), many of which are diverse in their woody floras. Within this geographic region, temperature and the amount and seasonality of rainfall define habitat types (UNESCO 1978). The F AO has estimated that there 1 are about 19 million km of potentially forested area in the global tropics, of which 58% were estimated to still be in closed forest in the mid-1970s (Sommers 1976; UNESCO 1978). Of this potentially forested region, 42% is categorized as dry forest lifezone, 33% is tropical moist forest, and 25% is wet or rain forest (Lugo 1988). The species diversity of these tropical habitats is very high. Raven (1976, in Mooney 1988) estimated that 65% of the 250,000 or more plant species of the earth are found in tropical regions. Of this floristic assemblage, a large fraction are woody species. In the well-collected tropical moist forest of Barro Colorado Island, Panama, 39. 7% (481 of 1212 species) of the native phanerogams are woody, arborescent species (Croat 1978). Another 21. 9% are woody vines and lianas. Southeast Asian Dipterocarp forests may contain 120-200 species of trees per hectare (Whitmore 1984), and recent surveys in upper Amazonia re corded from 89 to 283 woody species ~ 10 cm dbh per hectare (Gentry 1988). Tropical communities thus represent a global woody flora of significant scope.

This book brings out the central role of evolutionary genetics in all aspects of its connection to evolutionary biology.

This book, which contains 20 chapters, integrates the varied subdisciplines of genetics and their applications in gene conservation, tree improvement and biotechnology. Topics covered include: genetic variation in natural forests, the application of genetics in tree improvement and breeding programmes, and genomic sequences and molecular technologies. This book will be a valuable resource for students, scientists and professionals in the plant sciences, especially forest geneticists, tree breeders, forest managers and other natural resource specialists.

A authoritative summary of the current knowledge of the genetic organisation of bacterial populations.

Forest tree improvement has mainly been implemented to enhance the productivity of artificial forests. However, given the drastically changing global environment, improvement of various traits related to environmental adaptability is more essential than ever. This book focuses on genetic information, including trait heritability and the physiological mechanisms thereof, which facilitate tree improvement. Nineteen papers are included, reporting genetic approaches to improving various species, including conifers, broad-leaf trees, and bamboo. All of the papers in this book provide cutting-edge genetic information on tree genetics and suggest research directions for future tree improvement.

From majestic Redwoods to ancient Western Bristlecone Pines, California's trees have long inspired artists, poets, naturalists—and real estate developers. Verna Johnston's splendid book, illustrated with her superb color photographs and Carla Simmons's detailed black-and-white drawings, now offers an unparalleled view of the Golden State's world-renowned forests and woodlands. In clear, vivid prose, Johnston introduces each of the state's dominant forest types. She describes the unique characteristics of the trees and the interrelationships of the plants and animals living among them, and she analyzes how fire, flood, fungi, weather, soil, and humans have affected the forest ecology. The world of forest and woodland animals comes alive in these pages—the mating games, predation patterns, communal life, and the microscopic environment of invertebrates and fungi are all here. Johnston also presents a sobering view of the environmental hazards that threaten the state's trees: acid snow, ozone, blister rust, over-logging. Noting the interconnectedness of the diverse life forms within tree regions, she suggests possible answers to the problems currently plaguing these areas. Enriched by the observations of early naturalists and Johnston's many years of fieldwork, this is a book that will be welcomed by all who care about California's treasured forests and woodlands.

Intended for graduate and upper level undergraduate courses inbehavioural ecology where students are already familiar with thebasic ideas, this book continues to define the subject. Acompletely new set of contributions has been brought together oncemore to take account of the many exciting new developments in thefield. Each chapter presents a balanced view of the subject,integrating a clear exposition of the theory with a criticaldiscussion of how predictions have been tested by experiments andcomparative studies. In addition, the book points to unreconciledissues and possible future developments. Edited by two of the mosthighly regarded experts in the field, this new volume containscontributions from an international authorship and continues thetradition of clarity and accessibility established by the threeprevious editions. The latest edition of a classic in behavioural ecology. Divided into three sections: Mechanisms and IndividualBehaviour, From Individual Behaviour to Social Systems, and LifeHistories, Phylogenies and Populations. Contributions from the world's leading researchers.