The Origin, Expansion, and Demise of Plant Species (Oxford Series in Ecology and Evolution)

This book provides a thoughtful and original reassessment of our understanding of plant speciation and extinction, by one of the leading workers on plant evolution. It is suitable for use in seminars mostly in departments of botany or plant sciences, and should also be read by workers interested in speciation mechanisms and ecological succession at the community and landscape levels. Combining insights from observation, experimentation, and theory, The Origin, Expansion, and Demise of Plant Species offers a broad overview of species as dynamic entities that arise, have unique evolutionary histories, and ultimately go extinct. It begins with a review of species concepts and the exposition of a new concept; it then addresses plant speciation, the expansion of species from their narrow centers of origin, intraspecific differentiation, and contact zones between differentiated population systems. Special attention is given to the breakdown of cohesion among populations by reproductive and spatial barriers. Also, the ecological and genetic properties of small populations and fragmented population systems are discussed with a focus on the role of hybridization in the demise of species. It ends with an exploration of the longevity of species and the tempo of diversification, contrasting different groups of plants in these respects as well as in rates of chromosomal differentiation. This book provides a new synthesis of evolutionary biology and ecology. It examines species from their origins, then follows them through their expansion, differentiation and loss of cohesion, and decline and extinction. The stages in the lives of species are viewed through ecological and genetic theory, and topics typically addressed independently are woven into a continuous fabric. As the first synthetic treatment of the stages through which plant species pass, this book is very useful for botanists, evolutionary biologists, conservation biologists, as well as all curious students of the biological sciences. This book provides a thoughtful and original reassessment of our understanding of plant speciation and extinction, by one of the leading workers on plant evolution. It provides a new synthesis of evolutionary biology and ecology and examines species from their origins, then follows them through their expansion, differentiation and loss of cohesion, decline and extinction. The stages in the lives of species are viewed through ecological and genetic theory, and topics typically addressed independently are woven into a continuous fabric. As the first synthetic treatment of the stages through which plant species pass, this book is very useful for botanists,
evolutionary biologists, conservation biologists, as well as all curious students of the biological sciences. Contents......Page 8 1. The Premise and Species Concepts......Page 12 2. Speciation: The Ecological Transition......Page 25 3. Speciation: The Genetic Transition......Page 49 4. The Geographical Scale of Speciation......Page 68 5. The Geographical Expansion of Neospecies......Page 87 6. Differentiation and the Breakdown of Species Unity......Page 117 7. The Decline and Demise of Species......Page 137 8. The Persistence and Sorting of Incipient Species......Page 170 9. Species Duration and the Tempo of Diversification......Page 180 Literature Cited......Page 190 B......Page 232 D......Page 233 G......Page 234 J......Page 235 P......Page 236 R......Page 237 S......Page 238 Z......Page 239 Each plant species has its own unique passage that is affected by a variety of aspects to which it is exposed. This book explores plant species as dynamic entities within this passage, following the four stages of plant-species life that normally occur Each plant species has its own unique passage that is affected by a variety of aspects to which it is exposed. This book explores plant species as dynamic entities within this passage, following the four stages of plant species life Donald A. Levin. Includes Bibliographical References (p. 181-222) And Index.