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- W2314863575 abstract "I investigated the effects of host plant distribution on the host plant choice of flower-visiting insects in mixed stands of the hawkweeds Hieracium aurantiacum L. and H. florentinum All. The way in which pollinators divide their visits among simultaneously blooming plant species determines the outcome of plant competition for pollinators, which may affect community structure. Although the hawkweeds are apomictic, these stands are simple communities that embody many of the assumptions of published models concerning the effects of stand composition on insect foraging. Existing theory suggests that visitation on one of two competing species should increase with its proportion in the stand. Visitation on H. aurantiacum follows this relationship, but H. florentinum receives more visits with H. aurantiacum present than when it blooms alone. Extension of this result to other, non-apomictic species implies that a species may occasionally be benefitted by the presence of an apparent competitor. I propose a tentative explanation based on pollinator inconstancy and foraging habitat selection, and suggest some possible effects of these phenomena on community structure." @default.
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- W2314863575 date "1978-10-01" @default.
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- W2314863575 title "Effects of Stand Composition on Insect Visitation in Two-Species Mixtures of Hieracium" @default.
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- W2314863575 doi "https://doi.org/10.2307/2424843" @default.
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