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Pollinator-Driven Speciation in Sexually Deceptive Orchids of the Genus Ophrys

Title data

Ayasse, Manfred ; Gögler, Julia ; Stökl, Johannes:
Pollinator-Driven Speciation in Sexually Deceptive Orchids of the Genus Ophrys.
In: Glaubrecht, Matthias (ed.): Evolution in Action : Case studies in Adaptive Radiation, Speciation and the Origin of Biodiversity. - Berlin : Springer , 2010 . - pp. 101-118
ISBN 978-3-642-12425-9
DOI: https://doi.org/10.1007/978-3-642-12425-9_6

Abstract in another language

Ophrys orchids mimic females of their pollinator species to attract male insects for pollination. Reproductive isolation is based on the specific attraction of males of usually a single pollinator species, mostly bees, by mimicking the female species-specific sex-pheromone. Sexually deceptive orchids are ideal candidates for studies of sympatric speciation, because key adaptive traits such as the pollinator-attracting scent are associated with their reproductive success and with premating isolation.

We have investigated processes of ecological speciation by using behavioural experiments and chemical, electrophysiological and population-genetic analyses. We show that minor changes in floral odour bouquets might be the driving force for pollinator shifts and speciation events. New pollinators act as an isolation barrier towards other sympatrically occurring species. Hybridisation occurs because of similar odour bouquets of species and the overlap of flowering periods. Hybrid speciation can also lead to the displacement of species by the hybrid population, if its reproductive success is higher than that in the parental species.

Further data

Item Type: Article in a book
Refereed: Yes
Additional notes: BAYCEER147296
Keywords: Hybrid Speciation; Floral Scent; Pollinator Species; Pollinator Attraction; Floral Odour
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology II - Evolutionary Animal Ecology > Chair Animal Ecology II - Evolutionary Animal Ecology - Univ.-Prof. Dr. Sandra Steiger
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
Date Deposited: 15 Apr 2019 10:04
Last Modified: 15 Apr 2019 10:04
URI: https://eref.uni-bayreuth.de/id/eprint/48393