NDLI: Specialised host-use and phenophase tracking in restio leafhoppers (Cicadellidae: Cephalelini) in the Cape Floristic Region

Content Provider	Springer Nature Link
Author	Augustyn, Willem J. Anderson, Bruce Stiller, Michael Ellis, Allan G.
Copyright Year	2013
Abstract	The Cape Floristic Region (CFR) has exceptionally high plant diversity, but because there are so few studies on insect diversity and diet breadth, little is known about the relationship between plant and insect diversity. One possibility is that plant and insect diversity in the CFR are linked through host specialisation. Alternatively, the nutrient-poor soils of the CFR may favour generalist feeding strategies with insects tracking the favourable phenophases of a variety of host plants. We studied Cephalelus, a genus of leafhoppers apparently specialised on the Restionaceae, a diverse and dominant plant family in the CFR. We examined patterns of Cephalelus host association at a single site during a 24 month field survey to determine whether Cephalelus diversity is related to the partitioning of host plant or temporal niches; or whether Cephalelus tracks the most nutritive phenophases of restios by temporal host-switching. Seven Cephalelus species were recorded which varied in their seasonal abundance patterns. The majority of these species exhibited specialised host use on different Restionaceae species, with the exception of C. pickeri. This species specialised on two host plants. The populations of two dominant species, C. pickeri and C.uncinatus, tracked the phenology of their primary host plants but not of the Restionaceae in general. To conclude; we find no evidence for host-switching or generalism in Cephalelus. Instead, they appear to be host-specialised, suggesting coupling between their diversity and that of their host plants; the Restionaceae in the CFR.
Starting Page	1267
Ending Page	1274
Page Count	8
File Format	PDF
ISSN	1366638X
Journal	Journal of Insect Conservation
Volume Number	17
Issue Number	6
e-ISSN	15729753
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-11-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cape Floristic Region Host specialisation Cephalelus Host phenology Generalization Insect herbivory Entomology Conservation Biology/Ecology Biodiversity Animal Ecology Life Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Animal Science and Zoology Nature and Landscape Conservation Insect Science

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