Host-switching by a bee where its usual pollen host is not present: Diadasia diminuta (Cresson, 1878) (Apidae: Eucerinae: Emphorini) uses the rare mallow, Iliamna latibracteata Wiggins (Malvaceae), as its pollen host in northwestern California and southwestern Oregon

IF 0.6 4区 农林科学 Q4 ENTOMOLOGY
Michael R. Mesler, Sydney K. Carothers
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引用次数: 0

Abstract

Abstract. Diadasia diminuta (Cresson, 1878) (Apidae: Eucerinae: Emphorini) uses Sphaeralcea St. Hil. (Malvaceae) as its pollen host throughout much of its range in dry habitats of the western U.S. and Central America. Here we document a regional shift in pollen host and habitat. Based on observations of foraging behavior spanning 1–11 years at 17 study sites and analyses of scopal pollen loads collected at nest entrances, we show that D. diminuta relies almost exclusively on a rare, fire-following mallow, Iliamna latibracteata Wiggins (Malvaceae), as its pollen host in relatively mesic forest habitats of northwestern California and southwestern Oregon. The generalized flowers of I. latibracteata attract a wide array of visitors, but D. diminuta is likely the most important pollinator; it was present at 16 of 17 sites and accounted for at least 70% of visits in more than half of 52 site-year visitor surveys. Although D. diminuta is widespread and abundant across most of its range, we argue that the rare disjunct populations studied here may be genetically distinct and perhaps represent a case of incipient speciation, making them worthy of conservation concern.
蜜蜂在花粉寄主不存在的情况下转换宿主:在加利福尼亚西北部和俄勒冈州西南部,Diadasia diminuta (Cresson, 1878)(蜂科:蜂科:凤梨科)使用罕见的锦葵Iliamna latibracteata Wiggins(锦葵科)作为其花粉寄主
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来源期刊
Pan-Pacific Entomologist
Pan-Pacific Entomologist 生物-昆虫学
CiteScore
0.50
自引率
20.00%
发文量
47
审稿时长
>12 weeks
期刊介绍: The Pan-Pacific Entomologist (ISSN 0031-0603) is published quarterly (January, April, July and October) by the Pacific Coast Entomological Society, in cooperation with the California Academy of Sciences. The journal serves as a refereed publication outlet and accepts manuscripts on all aspects of the biosystematics of insects and closely related arthropods, especially articles dealing with their taxonomy, biology, behavior, ecology, life history, biogeography and distribution. Membership in the Pacific Coast Entomological Society includes subscription to The Pan-Pacific Entomologist, and Society Proceedings typically appear in the October issue of each volume.
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