Read e-book online Alien Species and Evolution: The Evolutionary Ecology of PDF

By George W. Cox

ISBN-10: 1423767152

ISBN-13: 9781423767152

ISBN-10: 1559630094

ISBN-13: 9781559630092

In Alien Species and Evolution, biologist George W. Cox stories and synthesizes rising info at the evolutionary alterations that ensue in vegetation, animals, and microbial organisms once they colonize new geographical components, and at the evolutionary responses of the local species with which alien species interact.The ebook is huge in scope, exploring details throughout a wide selection of taxonomic teams, trophic degrees, and geographic components. It examines theoretical themes relating to swift evolutionary switch and helps the rising idea that species brought to new actual and biotic environments are rather susceptible to swift evolution. the writer attracts on examples from all components of the realm and all significant surroundings varieties, and the diversity of examples used offers significant perception into the styles of evolution which are prone to end result from the big advent of species to new geographic areas that's at the moment taking place round the globe.Alien Species and Evolution is the single cutting-edge evaluate and synthesis to be had of this severely very important subject, and is an important paintings for an individual fascinated about the hot technological know-how of invasion biology or the threats posed through invasive species.

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Additional resources for Alien Species and Evolution: The Evolutionary Ecology of Exotic Plants, Animals, Microbes, and Interacting Native Species

Example text

Plant seeds are carried by almost all types of transport vehicles, so the dispersal of many invasive plants tends to follow railroad lines and highways. On a broader scale, human-assisted dispersal is responsible for the vast majority of intercontinental and interoceanic introductions of alien species. They provide rapid mechanisms of dispersal to which some species are preadapted and to which others may evolve adaptations. Perhaps the most common inadvertent means of introduction of alien plants to new continents has been via crop seed contaminants.

Seed mass increased significantly with estimated time since founding of stands as lodgepole pine migrated north following glacial retreat. Similar selection pressures are especially likely to act on species colonizing any sort of fragmented habitat. Roff (1990) concluded, for example, that among insects, the loss of flight capability was lowest in species that use patchy habitats. Inasmuch as habitat fragmentation is a major feature of global environmental change, alien species in particular will experience strong selection for the ability to colonize such habitats (Barrett 2000).

Whether or not rapid evolutionary responses have occurred as a consequence of such selection is not yet known. Rapid Evolution of Enhanced Establishment Capability Strong selection also exists for reproductive success by individuals that have reached new, favorable environments. Genetic variants that have a reduced reliance on outcrossing or on biotic pollination mechanisms are likely to be favored in small, isolated populations. Gradual evolutionary shifts from outcrossing to self-fertilization may be one of the evolutionary processes underlying the time lag phenomenon associated with the rise of many introduced species to the status of seriously invasive species.

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Alien Species and Evolution: The Evolutionary Ecology of Exotic Plants, Animals, Microbes, and Interacting Native Species by George W. Cox

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