By George W. Cox
In Alien Species and Evolution, biologist George W. Cox reports and synthesizes rising info at the evolutionary alterations that happen in crops, animals, and microbial organisms once they colonize new geographical parts, and at the evolutionary responses of the local species with which alien species interact.The ebook is wide in scope, exploring details throughout a large choice of taxonomic teams, trophic degrees, and geographic components. It examines theoretical themes regarding swift evolutionary switch and helps the rising idea that species brought to new actual and biotic environments are quite at risk of swift evolution. the writer attracts on examples from all elements of the realm and all significant environment kinds, and the range of examples used supplies substantial perception into the styles of evolution which are more likely to outcome from the big creation of species to new geographic areas that's at the moment happening round the globe.Alien Species and Evolution is the single cutting-edge assessment and synthesis to be had of this severely vital subject, and is a necessary paintings for an individual involved in the recent technology of invasion biology or the threats posed via invasive species.
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Extra info for Alien Species and Evolution: The Evolutionary Ecology of Exotic Plants, Animals, Microbes, and Interacting Native Species
Crus-galli occur as weeds outside rice fields. Needless to say, dispersal from their Asian region of origin has been as a contaminant in rice seed. An agroecotype of vetch (Vicia sativa), for example, possesses flattened seeds that mimic those of lentils (Lens esculenta). False flax (Camelina sativa), a member of the mustard family, is a mimic of cultivated flax (Linum usitatissimum). Dispersal by Deliberate Introduction Characteristics that make plants and animals valuable or attractive to humans are, in a sense, preadaptations for their dispersal to new geographical regions.
In central Mexico, a surprising number of cropland weeds possess burrs, hooks, or awns that appear to adapt them for dispersal on the clothing of farmers (Vibrams 1999). Other plants produce fruit that contains seeds that pass intact through the digestive tract of animals. In most cases, animal-assisted dispersal functions only for short distances. Although waterfowl and other plant-feeding birds may fly long distances on migration, the probability of transport of viable seed in their digestive tracts to distant, yet suitable, habitats is small (Charalambidou and Santamaría 2002; Clausen et al.
Pappus volume also showed a tendency to decrease over time. Experiments also indicated that wind-carried seeds of both Hypochoeris and long-established Lactuca fell to the ground more quickly than seeds of mainland plants or newly established island plants. The seeds of Lactuca that were able to colonize remote islands were light and had a large pappus that favored their longdistance transport. Once established on an island, however, selection favored heavier seed with a smaller pappus, as these seeds would more likely remain on the island (fig.