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The evolution of flower colours and the influence of bee, bird and fly colour vision| title | The evolution of flower colours and the influence of bee, bird and fly colour vision |
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| start_date | 2022/10/06 |
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| schedule | 12h15 |
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| online | no |
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| location_info | 4R4 - rdc - salle de conférence |
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| summary | The Australia continent has been geologically separated for 34 million years and shows a diverse range of endemic plants where biotic pollination reveals a colourful palette of evolved signals. Different types of pollinators including the phylogenetically conserved trichromatic colour vision of bees, the tetrachromatic colour vision of abundant bird species, and the colour-opponent vision of flower visiting flies can change flower signal evolution in competitive, facilitative or random ways. Flower colours in Australia are similar to sites tested in Asia, South America, Nepal and Europe; serving as a useful model for interpreting both local and global patterns. We show how pollinator vision results in significant changes in flower colouration, independent of plant phylogeny. On a remote island where only fly pollinators are present colours are filtered to a yellow-green hue; whilst on the mainland continent where all pollinator types are present then colours become even more consistent due to competitive factors. Both competition and facilitation processes occur mediated by seasonal temperature effects, resulting in reasonably stable distributions over an annual cycle. The data also points to how variations in temperature may benefit certain pollinators and result in a change in the stability of the pollination system. |
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| responsibles | Contact CBI |
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Workflow history| from state (1) | to state | comment | date |
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| submitted | published | | 2022/11/23 09:12 UTC |
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