Plants Of Oceanic Islands

This book provides a comprehensive view of the origin and evolution of the plants of an entire oceanic archipelago.

The Juan Fernández Archipelago is located in the Pacific Ocean west of Chile at 33° S latitude. Robinson Crusoe Island is 667 km from the continent and approximately four million years old; Alejandro Selkirk Island is an additional 181 km west and only one million years old. The natural impacts of subsidence and erosion have shaped the landscapes of these islands, resulting in progressive changes to their subtropical vegetation. The older island has undergone more substantial changes, due to both natural causes and human impacts. After the discovery of Robinson Crusoe Island in 1574, people began cutting down forests for lumber to construct boats and homes, for firewood, and to make room for pastures. Domesticated plants and animals were introduced, some of which have since become feral or invasive, causing damage to the local vegetation. The wealth of historical records on these activities provides a detailed chronicle of how human beings use their environment for survival in a new ecosystem. This book offers an excellent case study on the impacts that people can have on the resources of an oceanic island.

Oceanic island archipelagos provide many clues about evolutionary patterns and processes, and may rightly be considered as among the best places on earth to seek an understanding of the origin and elaboration of biological diversity. This volume brings together contributions covering a range of important issues in contemporary oceanic island plant biology, focusing on patterns and processes in various island groups (with emphasis on the Bonin, Hawaiian and Juan Fernandez Islands) to provide a stimulating view of the current state of research and a possible agenda for future investigations. Topics addressed include chromosomal variation, macromolecular divergence, island biogeography theory, isolating mechanisms, modes of speciation and evolution of secondary plant products. The result is a volume that reveals the special opportunities offered by oceanic archipelagos for investigating evolutionary phenomena in vascular plants.

Oceanic islands offer biologists unparalleled opportunities to study evolutionary processes and ecological phenomena. However, human activity threatens to alter or destroy many of these fragile ecosystems, with recent estimates suggesting that nearly half of the world's insular endemics are threatened with extinction. Bringing together researchers from around the world, this book illustrates how modern research methods and new concepts have challenged accepted theories and changed our understanding of island flora. Particular attention is given to the impact of molecular studies and the insights that they provide into topics such as colonisation, radiation, diversification and hybridisation. Examples are drawn from around the world, including the Hawaiian archipelago, Galapagos Islands, Madagascar and the Macronesian region. Conservation issues are also highlighted, with coverage of alien species and the role of ex situ conservation providing valuable information that will aid the formulation of management strategies and genetic rescue programmes.

Oceanic islands are storehouses for unique creatures. Zoologists have long been fascinated by island animals because they break all the rules. Speedy, nervous, little birds repeatedly evolve to become plump, tame and flightless on islands. Equally strange and wonderful plants have evolved on islands. However, plants are very poorly understood relatives to animals. Do plants repeatedly evolve similar patterns in dispersal ability, size and defence on islands? This volume answers this question for the first time using a modern quantitative approach. It not only reviews the literature on differences in defence, loss of dispersal, changes in size, alterations to breeding systems and the loss of fire adaptations, but also brings new data into focus to fill gaps in current understanding. By firmly establishing what is currently known about repeated patterns in the evolution of island plants, this book provides a roadmap for future research.

Written by the leading authorities on the plant diversity and ecology of the Pacific islands, this book is a magisterial synthesis of the vegetation and landscapes of the islands of the Pacific Ocean. It is organized by island group, and includes information on geography, geology, phytogeographic relationships, and human influences on vegetation. Vegetation of the Tropical Pacific Islands features over 400 color photographs, plus dozens of maps and climate diagrams. The authors’ efforts in assembling the existing information into an integrated, comprehensive book will be welcomed by biogeographers, plant ecologists, conservation biologists, and all scientists with an interest in island biology.