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Over the last two decades, the study of speciation has expanded from a modest backwater of evolutionary biology into a large and vigorous discipline. Thus, the literature on speciation, as well as the number of researchers and students working in this area, has grown explosively. Despite these developments, there has been no book-length treatment of speciation in many years. As a result, both the seasoned scholar and the newcomer to evolutionary biology had no ready guide to the recent literature on speciation--a body of work that is enormous, scattered, and increasingly technical. Although several excellent symposium volumes have recently appeared, these collections do not provide a unified, critical, and up-to-date overview of the field. Speciation is designed to fill this gap.Aimed at professional biologists, graduate students, and advanced undergraduates, Speciation covers both plants and animals (the first book on this subject to do so), and deals with all relevant areas of research, including biogeography, field work, systematics, theory, and genetic and molecular studies. It gives special emphasis to topics that are either controversial or the subject of active research, including sympatric speciation, reinforcement, the role of hybridization in speciation, the search for genes causing reproductive isolation, and mounting evidence for the role of natural and sexual selection in the origin of species. The authors do not hesitate to take stands on these and other controversial issues. This critical and scholarly book will be invaluable to researchers in evolutionary biology and is also ideal for a graduate-level course on speciation.

Over the last two decades, the study of speciation has expanded from a modest backwater of evolutionary biology into a large and vigorous discipline. Thus, the literature on speciation, as well as the number of researchers and students working in this area, has grown explosively. Despite these developments, there has been no book-length treatment of speciation in many years. As a result, both the seasoned scholar and the newcomer to evolutionary biology had no ready guide to the recent literature on speciation--a body of work that is enormous, scattered, and increasingly technical. Although several excellent symposium volumes have recently appeared, these collections do not provide a unified, critical, and up-to-date overview of the field. Speciation is designed to fill this gap.Aimed at professional biologists, graduate students, and advanced undergraduates, Speciation covers both plants and animals (the first book on this subject to do so), and deals with all relevant areas of research, including biogeography, field work, systematics, theory, and genetic and molecular studies. It gives special emphasis to topics that are either controversial or the subject of active research, including sympatric speciation, reinforcement, the role of hybridization in speciation, the search for genes causing reproductive isolation, and mounting evidence for the role of natural and sexual selection in the origin of species. The authors do not hesitate to take stands on these and other controversial issues. This critical and scholarly book will be invaluable to researchers in evolutionary biology and is also ideal for a graduate-level course on speciation.

Speciation is a subject of great interest because it represents both the formation of units of evolution and the connection between microevolution and macroevolution. The purpose of this book is to illustrate how different patterns of speciation and differentiation have occurred among diverse taxa.

Asking how speciation contributes to some of the great patterns in species diversity, Speciation in Birds explores the roles of natural selection and sexual selection in the most authoritative and modern synthesis on the subject to date.

Asking how speciation contributes to some of the great patterns in species diversity, Speciation in Birds explores the roles of natural selection and sexual selection in the most authoritative and modern synthesis on the subject to date.

New Approaches to Speciation in the Fossil Record provides the most up-to-date and comprehensive examination of recent advances in the analysis of speciation since then.This collection of case studies seeks to reexamine the understanding of the speciation patterns that appear in the fossil record through stringent analysis of the patterns and their presumed processes. The contributions address the questions of speciation by conducting specific, detailed studies of particular lineages. The rigorous techniques of morphological analysis, quantitative genetic analysis, phylogenetic analysis, and sedimentary completeness are employed to offer a fresh look at speciation.New Approaches to Speciation in the Fossil Record is divided into three sections. The first part gives a historical perspective on the issues under consideration, and explores the current debates and future directions for research. In Part II, five case studies describe speciation patterns, while raising significant methodological issues for further inquiry. The third section looks at the large-scale macroevolutionary issues that affect patterns in the fossil record.The new perspectives revealed here make this a unique resource for students, teachers, and professionals in the fields of paleontology and evolutionary biology.

Although the species is one of the fundamental units of biological classification, there is remarkably little consensus among biologists about what defines a species, even within distinct sub-disciplines. The literature of paleobiology, in particular, is littered with qualifiers and cautions about applying the term to the fossil record or equating such species with those recognized among living organisms. In Species and Speciation in the Fossil Record, experts in the field examine how they conceive of species of fossil animals and consider the implications these different approaches have for thinking about species in the context of macroevolution. After outlining views of the Modern Synthesis of evolutionary disciplines and detailing the development within paleobiology of quantitative methods for documenting and analyzing variation within fossil assemblages, contributors explore the challenges of recognizing and defining species from fossil specimens—and offer potential solutions. Addressing both the tempo and mode of speciation over time, they show how with careful interpretation and a clear species concept, fossil species may be sufficiently robust for meaningful paleobiological analyses. Indeed, they demonstrate that the species concept, if more refined, could unearth a wealth of information about the interplay between species origins and extinctions, between local and global climate change, and greatly deepen our understanding of the evolution of life.

The origin of biological diversity, via the formation of new species, can be inextricably linked to adaptation to the ecological environment. Specifically, ecological processes are central to the formation of new species when barriers to gene flow (reproductive isolation) evolve between populations as a result of ecologically-based divergent natural selection. This process of 'ecological speciation' has seen a large body of particularly focused research in the last 10-15 years, and a review and synthesis of the theoretical and empirical literature is now timely.The book begins by clarifying what ecological speciation is, its alternatives, and the predictions that can be used to test for it. It then reviews the three components of ecological speciation and discusses the geography and genomic basis of the process. A final chapter highlights future research directions, describing the approaches and experiments which might be used to conduct that future work. The ecological and genetic literature is integrated throughout the text with the goal of shedding new insight into the speciation process, particularly when the empirical data is then further integrated with theory.

The origin of biological diversity, via the formation of new species, can be inextricably linked to adaptation to the ecological environment. Specifically, ecological processes are central to the formation of new species when barriers to gene flow (reproductive isolation) evolve between populations as a result of ecologically-based divergent natural selection. This process of 'ecological speciation' has seen a large body of particularly focused research in the last 10-15 years, and a review and synthesis of the theoretical and empirical literature is now timely.The book begins by clarifying what ecological speciation is, its alternatives, and the predictions that can be used to test for it. It then reviews the three components of ecological speciation and discusses the geography and genomic basis of the process. A final chapter highlights future research directions, describing the approaches and experiments which might be used to conduct that future work. The ecological and genetic literature is integrated throughout the text with the goal of shedding new insight into the speciation process, particularly when the empirical data is then further integrated with theory.

Adaptive speciation occurs when biological interactions induce disruptive selection and the evolution of assortative mating, thus triggering the splitting of lineages. Internationally recognized authorities explain exciting developments in modeling speciation, including celebrated examples of rapid speciation by natural selection. The text is geared toward students and researchers in biology, physics, and mathematics.

Metal Speciation and Bioavailability in Aquatic Systems is thefirst comprehensive review to deal with fundamental concepts andmodels, speciation measurements and field applications in metalspeciation and bioavailability in aquatic environments. This volumeprovides a thorough review of current developments concerning theinteractions between trace metals and aquatic organisms. MetalSpeciation and Bioavailability in Aquatic Systems provides: * The first comprehensive approach to the subject covering allaspects of trace metal ecotoxicology in the environment. * Essential reading for researchers and graduate students who willappreciate critical reviews of classical and modern methods ofmetal speciation. * Contributions from leading scientists from many disciplinesassessing both analytical and physical methods applied to thisgrowing field of environmental analysis. * An introduction to the use of laboratory bioassays as predictivetools for understanding trace metal organism interactions. * An examination of the use and limitations of bioassays inmanagement decisions. The interdisciplinary nature of this topic is highlighted in MetalSpeciation and Bioavailability in Aquatic Systems, ensuring thatthis volume is invaluable for chemists, biochemists, biologists,ecologists and environmental engineers involved in the fields ofmetal ecotoxicology, metal speciation, environmental and analyticalchemistry, and the management of trace metals in aquatic systems.

Although the species is one of the fundamental units of biological classification, there is remarkably little consensus among biologists about what defines a species, even within distinct sub-disciplines. The literature of paleobiology, in particular, is littered with qualifiers and cautions about applying the term to the fossil record or equating such species with those recognized among living organisms. In Species and Speciation in the Fossil Record, experts in the field examine how they conceive of species of fossil animals and consider the implications these different approaches have for thinking about species in the context of macroevolution. After outlining views of the Modern Synthesis of evolutionary disciplines and detailing the development within paleobiology of quantitative methods for documenting and analyzing variation within fossil assemblages, contributors explore the challenges of recognizing and defining species from fossil specimens—and offer potential solutions. Addressing both the tempo and mode of speciation over time, they show how with careful interpretation and a clear species concept, fossil species may be sufficiently robust for meaningful paleobiological analyses. Indeed, they demonstrate that the species concept, if more refined, could unearth a wealth of information about the interplay between species origins and extinctions, between local and global climate change, and greatly deepen our understanding of the evolution of life.

Metal Speciation and Bioavailability in Aquatic Systems is thefirst comprehensive review to deal with fundamental concepts andmodels, speciation measurements and field applications in metalspeciation and bioavailability in aquatic environments. This volumeprovides a thorough review of current developments concerning theinteractions between trace metals and aquatic organisms. MetalSpeciation and Bioavailability in Aquatic Systems provides: * The first comprehensive approach to the subject covering allaspects of trace metal ecotoxicology in the environment. * Essential reading for researchers and graduate students who willappreciate critical reviews of classical and modern methods ofmetal speciation. * Contributions from leading scientists from many disciplinesassessing both analytical and physical methods applied to thisgrowing field of environmental analysis. * An introduction to the use of laboratory bioassays as predictivetools for understanding trace metal organism interactions. * An examination of the use and limitations of bioassays inmanagement decisions. The interdisciplinary nature of this topic is highlighted in MetalSpeciation and Bioavailability in Aquatic Systems, ensuring thatthis volume is invaluable for chemists, biochemists, biologists,ecologists and environmental engineers involved in the fields ofmetal ecotoxicology, metal speciation, environmental and analyticalchemistry, and the management of trace metals in aquatic systems.

Describes the evolutionary processes and patterns in higher plants as they occur in the various diverse types of genetic systems

New Approaches to Speciation in the Fossil Record provides the most up-to-date and comprehensive examination of recent advances in the analysis of speciation since then.This collection of case studies seeks to reexamine the understanding of the speciation patterns that appear in the fossil record through stringent analysis of the patterns and their presumed processes. The contributions address the questions of speciation by conducting specific, detailed studies of particular lineages. The rigorous techniques of morphological analysis, quantitative genetic analysis, phylogenetic analysis, and sedimentary completeness are employed to offer a fresh look at speciation.New Approaches to Speciation in the Fossil Record is divided into three sections. The first part gives a historical perspective on the issues under consideration, and explores the current debates and future directions for research. In Part II, five case studies describe speciation patterns, while raising significant methodological issues for further inquiry. The third section looks at the large-scale macroevolutionary issues that affect patterns in the fossil record.The new perspectives revealed here make this a unique resource for students, teachers, and professionals in the fields of paleontology and evolutionary biology.

Describes the evolutionary processes and patterns in higher plants as they occur in the various diverse types of genetic systems

Adaptive speciation occurs when biological interactions induce disruptive selection and the evolution of assortative mating, thus triggering the splitting of lineages. Internationally recognized authorities explain exciting developments in modeling speciation, including celebrated examples of rapid speciation by natural selection. The text is geared toward students and researchers in biology, physics, and mathematics.

Geographic Variation, Speciation and Clines explores the origins and development of geographic variation, divergence, and speciation. In particular it is concerned with genetic divergence as it is usually found on continents, among groups of populations isolated only by distance. Although earlier writers on this topic considered the effects of geography and dispersal, intense geographic differentiation and speciation were thought to require complete isolation. Professor Endler shows how geographic differentiation and speciation may develop in spite of continuous gene flow. Following a review of the diverse and scattered literature on gene flow and population differentiation, the author discusses the relationships among gene flow, dispersal, and migration. He then summarizes the factors which limit the geographic extent of gene flow, and those which allow steep clines to develop in the absence of barriers to gene flow. His analysis draws on examples from the field, experiments, and single- and multiple-locus models. The mechanism and conditions for parapatric speciation are presented: steepening clines, development into hybrid zones, and the evolution of sexual isolation. In the final chapter the author considers the interpretation of natural clines and the associated geographic patterns of subspecies and species.

Latest developments, new insights and knowledge derived from speciation analysis in one unique compilation: The reader gets acquainted with relevant instrumental as well as application aspects of metallomics approaches, paving the road to understanding fate, pathway, and action of metals in environment and organisms. Upon an introductory chapter on analytical methods and strategies, the full bandwidth of applications is discussed. Expert chapter authors cast spotlights on recent topics such as metallomics applications to environmental and nutrition studies as well as biology and medicine. Special chapters deal with the impact of manganese and iron on neurodegeneration, and the impact of nanoparticles on health.

Latest developments, new insights and knowledge derived from speciation analysis in one unique compilation: The reader gets acquainted with relevant instrumental as well as application aspects of metallomics approaches, paving the road to understanding fate, pathway, and action of metals in environment and organisms. Upon an introductory chapter on analytical methods and strategies, the full bandwidth of applications is discussed. Expert chapter authors cast spotlights on recent topics such as metallomics applications to environmental and nutrition studies as well as biology and medicine. Special chapters deal with the impact of manganese and iron on neurodegeneration, and the impact of nanoparticles on health.