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Pollination ecology of Ecuadorian Asclepiadoideae (Apocynaceae) : how generalized are morphologically specialized flowers?

Title data

Wolff, Doris ; Meve, Ulrich ; Liede-Schumann, Sigrid:
Pollination ecology of Ecuadorian Asclepiadoideae (Apocynaceae) : how generalized are morphologically specialized flowers?
In: Basic and Applied Ecology. Vol. 9 (2008) Issue 1 . - pp. 24-34.
ISSN 1439-1791
DOI: https://doi.org/10.1016/j.baae.2007.06.013

Abstract in another language

This paper studies phenology and pollination ecology of an assemblage of nine small-flowered species of Asclepiadoideae–Asclepiadeae in a southern Ecuadorian mountain forest. These observations were augmented by laboratory studies of floral traits including scanning electron microscopy. Supported by multidimensional scaling analysis, three distinct pollination systems were identified: (a) pollination by small flies (Orthosia, Scyphostelma), (b) pollination by small bees and flies (Ditassa), and (c) pollination unspecialized ("Cynanchum",Jobinia,Oxypetalum). Although numerous floral visitors were observed in the field, pollinaria were carried by only seveninsect species. The average pollinaria removal rate of all species was low with 0.3270.13%, and still lower for thepollinia insertion rate with 0.1370.07%. The ratio of inserted pollinia to removed pollinaria was comparatively highwith an average of 42.7722.3%. If an insect achieved pollinia transfer, it did so very effectively. The complex floralmorphology of the Asclepiadoideae has often been interpreted as a general trend toward specialization, but ourobservations indicate that the flowers are specialized functionally rather than ecologically.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER56531
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Plant Systematics > Chair Plant Systematics - Univ.-Prof. Dr. Sigrid Liede-Schumann
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 14 Jul 2015 06:21
Last Modified: 14 Jul 2015 06:21
URI: https://eref.uni-bayreuth.de/id/eprint/16358