Flowers visited by bombus on flowers strips : complementatrity of direct observations and corbicular loads composition
(2018) IX International Symposium on Pollination — Location: Berlin (16.May.2018)
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- Abstract
- Agri-Environment Schemes (AES) are increasingly implemented in European farmlands. Their contribution to biodiversity conservation remains poorly studied. In Belgium, two specific flower-strips AES are devoted to birds (fauna-strips) and to insects (pollinator-strips). We studied abundances and diversity of pollinating insects and flower resources (pollen and nectar) provided by both AES strips during four years. In particular, we aimed to check whether the strips provide floral resources to the main efficient pollinators in Belgium, bumblebees. We analyzed both the bumblebee-flower interactions and the fidelity of bumblebee individuals. The observations of direct flower-bumblebee interactions showed that only a few plant species, mainly belonging to Asteraceae, were visited. Centaurea jacea was the most visited plant species on insect-strips (75% of the visited flowers) and Trifolium incarnatum was the most visited on bird-strips (38%).Fidelity was determined by corbicular pollen load analyses. Trifolium repens was the most collected pollen on insect-strips (40% of corbicular pollen) whereas Phacelia tanacetifolia and Raphanus sativus were the most collected pollen on bird-strips (43% and 45% respectively of collected pollen). The combined approaches of direct flower-insect interactions and corbicular pollen load content revealed a sufficient complementarity in resources from the different plant species present in the strips.
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Ouvrard, P., & Jacquemart, A.-L. (2018). Flowers visited by bombus on flowers strips : complementatrity of direct observations and corbicular loads composition. IX International Symposium on Pollination, Berlin. https://hdl.handle.net/2078.5/171123