Reticulate Evolution Everywhere.- Can We Understand Evolution Without Symbiogenesis?.- Symbiosis: Evolution’s Co-Author.- Novel Endosymbioses as a Catalyst of Fast Speciation.- Historical and Epistemological Perspectives on What Lateral Gene Transfer Mechanisms Contribute to Our Understanding of Evolution.- Plasmids: Histories of a Concept.- Symbiosis Between Non-Transferable Plasmids and Prokaryote Cells.- Host-Symbiont-Pathogen-Host Interactions: Wolbachia, Vector-Transmitted Human Pathogens and the Importance of Quantitative Models of Multipartite Coevolution.- Evolution of The Human Microbiome and Impacts on Human Health, Infectious Disease and Hominid Evolution.- Divergence-With-Gene-Flow: What Humans and Other Mammals Got Up To.- A Multiset Model of Multi-Species Evolution to Solve Big Deceptive Problems.

Written for non-experts, this volume introduces the mechanisms that underlie reticulate evolution. Chapters are either accompanied with glossaries that explain new terminology or timelines that position pioneering scholars and their major discoveries in their historical contexts. The contributing authors outline the history and original context of discovery of symbiosis, symbiogenesis, lateral gene transfer, hybridization or divergence with gene flow, and infectious heredity. By applying key insights from the areas of molecular (phylo)genetics, microbiology, virology, ecology, systematics, immunology, epidemiology and computational science, they demonstrate how reticulate evolution impacts successful survival, fitness and speciation. Reticulate evolution brings forth a challenge to the standard Neo-Darwinian framework, which defines life as the outcome of bifurcation and ramification patterns brought forth by the vertical mechanism of natural selection. Reticulate evolution puts forward a pattern in the tree of life that is characterized by horizontal mergings and lineage crossings induced by symbiosis, symbiogenesis, lateral gene transfer, hybridization or divergence with gene flow, and infective heredity, making the “tree of life” look more like a “web of life.” On an epistemological level, the various means by which hereditary material can be transferred horizontally challenges our classic notions of units and levels of evolution, fitness, modes of transmission, linearity, communities, and biological individuality. The case studies presented examine topics including the origin of the eukaryotic cell and its organelles through symbiogenesis; the origin of algae through primary and secondary symbiosis and dinoflagellates through tertiary symbiosis; the superorganism and holobiont as units of evolution; how endosymbiosis induces speciation in multicellular life forms; transferrable and non-transferrable plasmids and how they symbiotically interact with their host; the means by which pro- and eukaryotic organisms transfer genes laterally (bacterial transformation, transduction and conjugation as well as transposons and other mobile genetic elements); hybridization and divergence with gene flow in sexually-reproducing individuals; current (human) microbiome and viriome studies that impact our knowledge concerning the evolution of organismal health and acquired immunity; and how symbiosis and symbiogenesis can be modelled in computational evolution.

Explains to non-experts how symbiosis, symbiogenesis, lateral gene transfer, hybridization and infectious heredity underlie reticulate evolution Includes glossaries that explain new terminology and timelines that situate major discoveries in their historical contexts Indexed in Book Citation Index Presents state of the art findings on how reticulate evolutionary mechanisms contribute to life’s evolution, what the theoretical and epistemological implications are for the standard evolutionary paradigm and how reticulate evolution contributes to health and disease Includes supplementary material: sn.pub/extras

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