Alien species and evolution, 1st Edition by George W. Cox

By George W. Cox

In Alien Species and Evolution, biologist George W. Cox studies and synthesizes rising details at the evolutionary alterations that take place in crops, animals, and microbial organisms after they colonize new geographical parts, and at the evolutionary responses of the local species with which alien species interact.
The e-book is vast in scope, exploring details throughout a wide selection of taxonomic teams, trophic degrees, and geographic components. It examines theoretical themes regarding speedy evolutionary switch and helps the rising idea that species brought to new actual and biotic environments are really liable to speedy evolution. the writer attracts on examples from all components of the area and all significant atmosphere forms, and the diversity of examples used provides substantial perception into the styles of evolution which are more likely to end result from the big creation of species to new geographic areas that's presently happening round the globe.
Alien Species and Evolution is the one cutting-edge overview and synthesis to be had of this seriously very important subject, and is a vital paintings for someone interested by the recent technology of invasion biology or the threats posed via invasive species.

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Cwynar and MacDonald (1987) found that seed mass of lodgepole pine (Pinus contorta) was smallest in the northernmost and most recently established stands in the Canadian Rocky Mountains. 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.

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.

Most of these probably arrived as contaminants in crop seed or animal fodder. The utilitarian phase of introductions comprises the numerous deliberate introductions of plants for herbal and medicinal use, pasture improvement, and forestry. The aesthetic phase constitutes deliberate introduction of plants for horticultural purposes. Obviously, these phases overlap, and today introductions still occur for all of the reasons cited above. These characteristics include sessile growth in shallow marine habitats, which preadapted plants and animals for growth on the hulls of ships, and tolerance of conditions in ballast water that came into use by modern transoceanic shipping.

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