15 Questions 114 Answers 0 Followers
Questions related from Klaus Lunau
Dear pollination ecologists, do you know studies or do have have own ideas about the stimulus that triggers the buzzing behaviour in bees? Do you think that tactile stimuli are reasonsible?
11 May 2016 9,217 23 View
Dear bee biologists, I want to learn how megachilid bees fill their ventral scopa. I am not interested in the legs movements rather than in the parts of the scopa which are filled first with...
06 May 2016 7,611 3 View
There are some reports about honest floral signals, e.g. flower colour change in many flowering plants correleted to nectar production, size of Dalechampia bracts indicating the size of a resin...
26 April 2016 1,726 5 View
Is there any convincing report that in diclinous plants the male flowers are not only larger, but open flowers also earlier on a daily basis as compared to the female flowers to guide the visitors...
12 April 2016 8,644 7 View
Many deceptive orchid possess nectar spurs, although they do not produce nectar. Is there any literature showing that bees are deceived by empty nectar spurs? And is there any literature...
07 April 2016 1,709 15 View
Dear All, I want to learn about pan trapping of bees and the most attractive colours. Does anybody know published spectral reflectance curves of pan trap colors? Can anybody explain the term...
09 March 2016 7,918 44 View
Many flowers show heliotropism and the flowers are sun tracking. The discussed benefits of sun tracking flowers are heating up the flowers for better pollen germination and seed production, and...
27 January 2016 9,647 5 View
Some plants produce echinate pollen, i.e. pollen grains with spines. Spiny pollen grains are known from many species of the Malvaceae, some species of the Convolvulaceae, Cucurbitaceae and...
28 December 2015 4,521 42 View
One particular type of floral guide and flower colour patterns is a dark center. I want to collect ideas about dark centers in flowers. I am aware of a few studies suggesting dark centers mimic...
28 December 2015 4,151 16 View
When training bees with sugar water as a reward it is imortant to know whether the bees can sense sugarwater. Is there any opinion or literature about whether bees can see sugarwater, bees can...
15 May 2015 3,840 11 View
Pollen that a bee has moved into to the scopa are no longer useful for pollination. Are there exceptions from this rule from a pollination textbook? What about pollen from the ventral scopa of...
20 February 2015 9,105 19 View
In some green leaves the veins are darker than the main leaf area, in some others the veins are brighter than the main leaf area. In some cases this is obviously caused by additional pigments? But...
12 February 2015 6,257 4 View
I want to get an overlook about hypotheses of the function of leaf variegation. I am aware of cases in which variegation patterns mimic mining insect larvae, spines or herbivores. I am looking...
14 January 2015 6,567 9 View
Is anyone out there aware of an idea or literature about a chemical cue of pollen? Bees, flies and other flower visitors use sugars as chemical cues in order to identify nectar; I ask whether...
04 January 2015 7,467 17 View
There is growing evidence that some flowers display structural colours, caused not (only) by pigments but by epidermis surface properties. These include gloss and iridescence. There is also...
01 January 1970 8,098 15 View
