Coextinction and cothreatened refer to the phenomena of the loss or decline of a host species resulting in the loss or endangerment of an other species that depends on it, potentially leading to cascading effects across trophic levels.[1] The term originated by the authors Stork and Lyal (1993)[2][3] and was originally used to explain the extinction of parasitic insects following the loss of their specific hosts. The term is now used to describe the loss of any interacting species, including competition with their counterpart, and specialist herbivores with their food source. Coextinction is especially common when a keystone species goes extinct.

  1. ^ Jönsson, M. T.; Thor, G.; Roberts, D. L. (2012). "Estimating Coextinction Risks from Epidemic Tree Death: Affiliate Lichen Communities among Diseased Host Tree Populations of Fraxinus excelsior". PLOS ONE. 7 (9): 1–10. Bibcode:2012PLoSO...745701J. doi:10.1371/journal.pone.0045701. PMC 3458109. PMID 23049840.
  2. ^ Stork, Nigel E.; Lyal, Christopher H. C. (25 December 1993). "Extinction or 'co-extinction' rates?". Nature. 366 (6453): 307–8. Bibcode:1993Natur.366..307S. doi:10.1038/366307a0. ISSN 0028-0836.
  3. ^ Turvey, Samuel T (May 28, 2009). Holocene Extinctions. Oxford University Press. p. 167.

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