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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Little interspecific pollen transfer despite overlap in pollinators between sympatric Aeonium (Crassulaceae) species pairs
Flora: Morphology, Distribution, Functional Ecology of Plants, Volume 204, No. 10, Year 2009
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Description
It is still unknown what exact role interspecific gene flow and reticulate patterns of gene transfer may play in adaptive radiations. To contribute to a better understanding of gene flow in a morphologically diverse and species-rich lineage, we investigated pollen transfer in the adaptively radiated Macaronesian Crassulaceae-Sempervivoideae. We aimed at comparing pollinator spectra and pollen transfer rates among sympatric species of Aeonium. Field studies were conducted on Tenerife (Canary Islands) including pollinator observations and estimations of pollen transfer using fluorescent dye powder as pollen analogue. Our results indicate an overlap in visiting insects among four sympatric species pairs of Aeonium. However, our dye experiments indicate that on an average about 95% of the detected pollen transfer was infraspecific. Only a small proportion of interspecific pollen transfer could be recorded. We explain these outcomes by specific pollinator behaviour such as floral preference and constancy during a foraging bout. This may be linked to different reward regimes of the studied Aeonium species. © 2009 Elsevier GmbH. All rights reserved.
Authors & Co-Authors
Esfeld, Korinna
Germany, Stuttgart
Staatliches Museum Für Naturkunde Stuttgart
Germany, Heidelberg
Universität Heidelberg
Koch, Marcus A.
Germany, Heidelberg
Universität Heidelberg
van der Niet, Timotheüs
South Africa, Durban
University of Kwazulu-natal
Seifan, Merav
Germany, Tubingen
Eberhard Karls Universität Tübingen
Thiv, Mike
Germany, Stuttgart
Staatliches Museum Für Naturkunde Stuttgart
Statistics
Citations: 10
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1016/j.flora.2008.10.002
Research Areas
Genetics And Genomics