Klaus Lunau

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Questions related from Klaus Lunau

Which flower signals are honest?

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 1,550 5 View

Which pan trap colors are attractive for bees?

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 7,805 44 View

How does flower suntracking correspond to bee foraging behaviour?

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 9,458 5 View

What is the function of spines in pollen grains?

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 4,466 42 View

Is pollination by pollen from the scopa possible?

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 9,051 19 View