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'''The resource fragmentation hypothesis''' was first proposed by [[Janzen & Pond]] (1975), and says that as [[species]] richness becomes large there is not a linear increase in the number of [[parasitoid]] species that can be supported. The mechanism for this [[hyperbolic function|hyperbolic]] relationship is suggested to be that each of the new host species are too rare to support the evolution of specialist parasitoids (Janzen & Pond, 1975). The resource fragmentation hypothesis is one of two hypotheses that seek to explain the distribution of the [[Ichneumonidae]].▼
▲'''The resource fragmentation hypothesis''' was first proposed by
==Further reading==▼
Gauld, I., Gaston, K., & Janzen, D. (1992) Plant allelochemicals, tritrophic interactions▼
==References==
*Janzen, D.H. & Pond, C.M. (1975) A comparison by sweep sampling of the arthropod fauna of secondary vegetation in Michigan, England, and Costa Rica. ''Transactions of the Royal Entomological Society of London'', 127, 33-50.
▲==Further reading==
▲*Gauld, I., Gaston, K., & Janzen, D. (1992) Plant allelochemicals, tritrophic interactions and the anomalous diversity of tropical parasitoids: the “nasty” host hypothesis. Oikos, 65, 353-357.
[[Category:Zoology]]
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