Journal
APIDOLOGIE
Volume 41, Issue 4, Pages 497-508Publisher
SPRINGER FRANCE
DOI: 10.1051/apido/2009084
Keywords
landscape barrier; fragmentation; foraging distance; Chelostoma florisomne; Hoplitis adunca
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Funding
- Competence Centre Environment and Sustainability (CCES)
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To investigate whether landscape structures act as insurmountable barriers for foraging bees, we conducted mark-recapture studies with two pollen-specialist solitary species. Foraging options of the bees were confined to host plant stands across different landscape structures. Differences in altitude of more than 130 m were overcome and forests covering a distance of up to 480 m were crossed by Chelostoma florisomne. A broad river and a motorway with intense traffic did not represent insurmountable barriers for Hoplitis adunca. For C. florisomne, total foraging distances of up to 650 m were measured, but foraging females were recorded predominantly on host plant patches available in relatively close vicinity to their nesting site. While landscape structures might impede foraging in endangered bees, the investigated landscape structures clearly did not act as insurmountable physical barriers for the two common solitary bee species tested in our study.
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