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Evolution's Wedge - David Pfennig, Karin Pfennig

Evolution's Wedge

Competition and the Origins of Diversity
Buch | Hardcover
320 Seiten
2012
University of California Press (Verlag)
978-0-520-27418-1 (ISBN)
CHF 123,95 inkl. MwSt
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Evolutionary biology has long sought to explain how new traits and new species arise. Darwin maintained that competition is key to understanding this biodiversity and held that selection acting to minimize competition causes competitors to become increasingly different, thereby promoting new traits and new species. Despite Darwin's emphasis, competition's role in diversification remains controversial and largely underappreciated. In their synthetic and provocative book, evolutionary ecologists David and Karin Pfennig explore competition's role in generating and maintaining biodiversity. The authors discuss how selection can lessen resource competition or costly reproductive interactions by promoting trait evolution through a process known as character displacement. They further describe character displacement's underlying genetic and developmental mechanisms. The authors then consider character displacement's myriad downstream effects, ranging from shaping ecological communities to promoting new traits and new species and even fueling large-scale evolutionary trends.
Drawing on numerous studies from natural populations, and written for a broad audience, Evolution's Wedge seeks to inspire future research into character displacement's many implications for ecology and evolution.

David W. Pfennig is Professor of Biology at the University of North Carolina. Karin S. Pfennig is Associate Professor of Biology at the University of North Carolina.

Preface 1. Discovery of a Unifying Principle Introduction A Brief History Detecting Character Displacement Phenomena Mistaken for Character Displacement What Constitutes Character Displacement? Conflation of Process and Pattern Reproductive Character Displacement versus Reinforcement Terminology A Unifying Principle Summary Further Reading Box 1.1: Alternative Manifestations of Character Displacement Box 1.2: Suggestions for Future Research 2. Why Character Displacement Occurs Introduction Why Ecological Character Displacement Occurs RESOURCE COMPETITION COMPETITIVE EXCLUSION SPECIES COEXISTENCE RESOURCE PARTITIONING VIA CHARACTER DISPLACEMENT VS. SPECIES SORTING Why Reproductive Character Displacement Occurs REPRODUCTIVE COMPETITION REPRODUCTIVE EXCLUSION REPRODUCTIVE PARTITIONING VIA CHARACTER DISPLACEMENT VS. SPECIES SORTING Summary Further Reading Box 2.1: Alternative Models of Species Coexistence Box 2.2: Is Competitively Induced Plasticity Character Displacement? Box 2.3: Suggestions for Future Research 3. When Character Displacement Occurs Introduction Facilitators of Character Displacement STANDING VARIATION STRONG SELECTION ECOLOGICAL OPPORTUNITY LACK OF ANTAGONISTIC GENETIC CORRELATIONS GENE FLOW INITIAL DIFFERENCES Variation in the Expression of Character Displacement How Ecological and Reproductive Character Displacement Facilitate Each Other ECOLOGICAL DIVERGENCE AS A FACILITATOR OF REPRODUCTIVE DIVERGENCE REPRODUCTIVE DIVERGENCE AS A FACILITATOR OF ECOLOGICAL DIVERGENCE WHY ONE FORM IS NECESSARY TO FACILITATE THE OTHER How Ecological and Reproductive Character Displacement Can Impede Each Other Summary Further Reading Box 3.1: Suggestions for Future Research 4. How Character Displacement Unfolds Introduction Mechanisms of Divergence GENETICALLY CANALIZED DIVERGENCE ENVIRONMENTALLY INDUCED DIVERGENCE Tempo and Mode of Character Displacement HOW MECHANISMS DIFFER IN SPEED OF DIVERGENCE THE PLASTICITY-FIRST HYPOTHESIS EMPIRICAL TESTS OF THE PLASTICITY-FIRST HYPOTHESIS Summary Further Reading Box 4.1: Suggestions for Future Research 5. Diversity and Novelty Within Species Introduction How Intraspecific Character Displacement Works Intraspecific Character Displacement: Observational Evidence Intraspecific Character Displacement: Experimental Evidence Evolution of Alternative Phenotypes FREQUENCY-DEPENDENT DISRUPTIVE SELECTION AND THE EVOLUTION OF ALTERNATIVE PHENOTYPES EVOLUTION OF RESOURCE POLYMORPHISM EVOLUTION OF MATING POLYMORPHISM Intraspecific Character Displacement and Species Diversity Character Displacement Within Versus Between Species Summary Further Reading Box 5.1: Suggestions for Future Research 6. Ecological Consequences Introduction Evolution of the Niche Partitioning of Resources and Reproduction: A Reprise Community Organization Character Displacement and Darwinian Extinction Species Distributions and Geographic Mosaics Character Displacement and Species Ranges Summary Further Reading Box 6.1: Individual Variation and the Coexistence of Species Box 6.2: Suggestions for Future Research 7. Sexual Selection Introduction How Sexual Selection Works How Character Displacement Affects Sexual Selection EFFECTS OF PHENOTYPIC SHIFTS EFFECTS OF HABITAT SHIFTS Implications of Character Displacement's Effects on Sexual Selection How Sexual Selection Affects Character Displacement A Cautionary Note: Process Versus Pattern Summary Further Reading Box 7.1: Suggestions for Future Research 8. Speciation Introduction What are Species? How are Species Boundaries Maintained? Evolution of Isolating Mechanisms Character Displacement's Role in Speciation HOW CHARACTER DISPLACEMENT FINALIZES SPECIATION HOW CHARACTER DISPLACEMENT INITIATES SPECIATION HOW INTRASPECIFIC CHARACTER DISPLACEMENT INITIATES SPECIATION Summary Further Reading Box 8.1: Selection and the Evolution of Reproductive Isolation Box 8.2: Suggestions for Future Research 9. Macroevolution Introduction Competition in the Fossil Record Methods for Studying Macroevolution: Rewinding the Tape of Life Adaptive Radiation SPECIES PROLIFERATION DIVERGENT EVOLUTION Evolutionary Escalation Macroevolution: Red Queen or Court Jester? Summary Further Reading Box 9.1: Suggestions for Future Research 10. Major Themes and Unsolved Problems Introduction Major Themes of the Book CHARACTER DISPLACEMENT IS A PROCESS, NOT A PATTERN CHARACTER DISPLACEMENT CAN PRODUCE DIFFERENT FORMS OF TRAIT EVOLUTION ECOLOGICAL AND REPRODUCTIVE CHARACTER DISPLACEMENT INTERACT PHENOTYPIC PLASTICITY CAN MEDIATE CHARACTER DISPLACEMENT CHARACTER DISPLACEMENT PROMOTES DIVERSIFICATION AT MULTIPLE LEVELS CHARACTER DISPLACEMENT AND SEXUAL SELECTION INTERACT CHARACTER DISPLACEMENT HAS MACROEVOLUTIONARY IMPLICATIONS Some Unsolved Problems Summary

Erscheint lt. Verlag 6.11.2012
Reihe/Serie Organisms and Environments ; 12
Zusatzinfo 72 line illustrations, 7 tables
Verlagsort Berkerley
Sprache englisch
Maße 178 x 254 mm
Gewicht 816 g
Themenwelt Naturwissenschaften Biologie Ökologie / Naturschutz
Naturwissenschaften Geowissenschaften Geologie
ISBN-10 0-520-27418-0 / 0520274180
ISBN-13 978-0-520-27418-1 / 9780520274181
Zustand Neuware
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