Journal of Apicultural Science

Pollination activity of bees (Apoidea: Apiformes) visiting the flowers of Tilia cordata Mill. and Tilia tomentosa Moench in the urban environment

Journal of Apicultural Science. Volume 54, Issue 2, Pages 73-79, ISSN (Print) 1643-4439
The pollination activity of bee communities was studied on the flowering linden trees Tilia cordata and Tilia tomentosa in the urban environment of the city of Toruń, Poland. In?2002, the activity of bees while visiting the flowers of Tilia cordata and Tilia?tomentosa was similar. During 2002, there was a cooler flowering period for the Tilia?cordata species and a bit warmer period for the Tilia tomentosa species. In 2003, during the warmer season with thermally similar flowering periods, flowers of Tilia tomentosa were visited twice as often as compared to flowers of Tilia cordata. It was found that toxic properties of Tilia?tomentosa nectar are stronger for bumblebees than for Apis mellifera. During the warmer flowering period, bumblebees were being intoxicated almost twice as often compared to the cooler period. The contribution of intoxicated bumble bees did not significantly increase (from 5% to 8%) even though there was a tenfold increase in the contribution of all bumblebees visiting the flowers during the studied seasons from 2002 to 2003.
piformes, bees, Tilia cordata, Tilia tomentosa, pollination activity
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