کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2179987 1095100 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Little interspecific pollen transfer despite overlap in pollinators between sympatric Aeonium (Crassulaceae) species pairs
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Little interspecific pollen transfer despite overlap in pollinators between sympatric Aeonium (Crassulaceae) species pairs
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flora - Morphology, Distribution, Functional Ecology of Plants - Volume 204, Issue 10, 2009, Pages 709–717
نویسندگان
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