Download Coevolution of Life on Hosts: Integrating Ecology and by Dale H. Clayton, Sarah E. Bush, Kevin P. Johnson PDF

By Dale H. Clayton, Sarah E. Bush, Kevin P. Johnson

For such a lot, the mere point out of lice forces an instantaneous hand to the pinnacle and recollection of adolescence reviews with nits, medicated shampoos, and demanding haircuts. yet for a undeniable breed of biologist, lice make for interesting medical fodder, specially enlightening within the research of coevolution. during this e-book, 3 best specialists on host-parasite relationships display how the beautiful coevolution that happens among such species in microevolutionary, or ecological, time generates transparent footprints in macroevolutionary, or ancient, time. by means of integrating those scales, Coevolution of lifestyles on Hosts bargains a entire realizing of the impact of coevolution at the variety of all life.

Following an advent to coevolutionary innovations, the authors mix experimental and comparative host-parasite methods for checking out coevolutionary hypotheses to discover the impression of ecological interactions and coadaptation on styles of diversification and codiversification between interacting species. Ectoparasites—a varied assemblage of organisms that levels from herbivorous bugs on crops, to monogenean flatworms on fish, and feather lice on birds—are robust versions for the research of coevolution simply because they're effortless to monitor, mark, and count number. As lice on birds and mammals are everlasting parasites that spend their complete lifecycles at the our bodies in their hosts, they're perfect to producing a man-made assessment of coevolution—and, thereby, provide a thrilling framework for integrating the ideas of coadaptation and codiversification.

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Extra info for Coevolution of Life on Hosts: Integrating Ecology and History

Sample text

These bacteria provide lice with dietary supplements, such as B vitamins (Smith et al. 2010; Smith 2011). Chewing lice ingest some fungi and bacteria on the surface of the host’s integument, but whether these contribute nutrients to the diet is unknown (Marshall 1981a). Fragments of mites in the alimentary tracts of both amblyceran and ischnoceran lice are common, but their nutritional value is also unknown (Pérez and Ateyo 1984). A few species of chewing lice feed on other lice, including members of their own species (Nelson and Murray 1971).

2011) argued that the close association and specificity of parasitic lice with their hosts makes it unlikely that the mass extinction hypothesis is correct. Instead, the ancient radiation of lice supports the hypothesis that modern- day bird and mammal lineages began radiating long before the K-Pg boundary. ’s paper is an interesting example of how parasites closely associated with host lineages can be used as “heirloom” parasites to reconstruct events in the evolutionary history of their hosts (Reed et al.

The absence of sucking lice from armadillos and pangolins, both of which also lack chewing lice, may be related to their hard integuments; however, this cannot explain why sucking lice are also not found on anteaters or sloths (sloths do have chewing lice). The absence of sucking lice from elephants may be related to the fact that they host blood-feeding chewing lice in another suborder, the Rhynchophthirina, which is the sister group of sucking lice (fig. 2). Some mammals, such as pigs, do have both sucking and chewing lice.

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