Phoresis or phoresy is a temporary commensalistic relationship when an organism (a phoront or phoretic) attaches itself to a host organism solely for travel.[2] It has been seen in ticks and mites since the 18th century,[3] and in fossils 320 million years old.[2] It is not restricted to arthropods or animals; plants with seeds that disperse by attaching themselves to animals are also considered to be phoretic.[4]
Phoresis is rooted in the Greek words phoras (bearing) and phor (thief).[3] The term, originally defined in 1896 as a relationship in which the host acts as a vehicle for its passenger, clashed with other terminology being developed at the time, so constraints on the length of time, feeding, and ontogeny are now considered.[3] Phoresis is used as a strategy for dispersal,[5][6]seasonal migration,[7] transport to new host/habitat,[8] escaping ephemeral habitats,[9][3] and reducing inbreeding depression.[10] In addition to the benefits afforded to individuals and species, its presence can add to the ecological diversity and complexity of an ecosystem.[4]
^Zeh, David W.; Zeh, Jeanne A. (1992). "On the Function of Harlequin Beetle-Riding in the Pseudoscorpion, Cordylochernes scorpioides (Pseudoscorpionida: Chernetidae)". The Journal of Arachnology. 20 (1): 47–51. JSTOR3705790.
^Binns, E. S. (1982). "Phoresy as migration--some functional aspects of phoresy in mites [Insect dispersion]". Biological Reviews of the Cambridge Philosophical Society. 57 (4): 571–620. doi:10.1111/j.1469-185X.1982.tb00374.x. S2CID84639744.
^Sabagh, Leandro T.; Dias, Roberto Júnio P.; Branco, Christina W. C.; Rocha, Carlos F. D. (2011-04-28). "News records of phoresy and hyperphoresy among treefrogs, ostracods, and ciliates in bromeliad of Atlantic forest". Biodiversity and Conservation. 20 (8): 1837–1841. doi:10.1007/s10531-011-0050-z. ISSN0960-3115. S2CID12658034.