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Ecological and Behavioral Basis for Reproductive Isolation in the Sympatric Enchenopa binotata Complex (Homoptera: Membracidae)

Thomas K. Wood and Sheldon I. Guttman
Evolution
Vol. 36, No. 2 (Mar., 1982), pp. 233-242
DOI: 10.2307/2408041
Stable URL: http://www.jstor.org/stable/2408041
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Ecological and Behavioral Basis for Reproductive Isolation in the Sympatric Enchenopa binotata Complex (Homoptera: Membracidae)
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Abstract

Life histories of the species in the Enchenopa complex of host-specific treehoppers are partially allochronic. Slight shifts in the sequence of days on which flight and mating occur restrict gene flow within this complex of species. Allochronic life histories are the primary factor in initiating and maintaining reproductive isolation. Allochronic male mortality and diel differences in mating further restrict hybridization. Other factors such as patchy distributions of hosts plants and mutualistic ants contribute to the disjunct pattern of populations of Enchenopa. Thus, reproductive isolation in this complex is the result of the interaction of multiple factors.

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