Dr. Sabine Radmacher


Department for Zoology

University of Regensburg

93040 Regensburg


Phone: +49-941-943-2959

Fax: +49-941-941-3304

Email: sabine.radmacher[at]biologie.uni-regensburg.de



Solitary bees are important pollinators of crops and natural plant populations. Due to the worldwide pollinator decline and the economic importance of pollination services, the interest in conservation and management of solitary bees has considerably increased. Thus, detailed knowledge about the requirements for successful reproduction, development and population maintenance for at least some model species is needed. My current research interests lie mainly in the requirements of the brood of the solitary Red Mason bee, Osmia bicornis. The offspring of this (and other) solitary bee species largely depend on the pollen provisions provided by their mother. Moreover, they are largely exposed to the fluctuating and often unpredictable ambient temperatures during development and wintering - and temperature is one of the most important environmental factors for ectotherm organisms and largely influences many important life history traits in insects. In my diploma project, I investigated effects of pollen provision quantity and quality (among other things) on bee offspring. In my PhD project, I focused on temperature effects during development on development time, synaptic organization in the brain and learning abilities of the bees. Due to the current climate change, detailed knowledge about temperature influences on solitary bees might be essential for the conservation of these important pollinators.

Project links:

- Breeding biology, investment allocation and larval performance.

Curriculum vitae


Born 13.04.1982 in Mechernich


Undergraduate studies in biology at the University of Wuerzburg


Graduate studies in biology at the University of Wuerzburg with focus on Animal Ecology, Sociobiology, plant ecophysiology


MSc (Diplom) in biology at the University of Wuerzburg (Diploma thesis: "Brutbiologie der Roten Mauerbiene Osmia bicornis - Polleneintrag, Pollendiversität und Parasitierung")


PhD student in Erhard Strohm`s lab at the University of Regensburg, Department for Zoology, thesis title: : "Temperature effects on the development in the solitary bee Osmia bicornis (Hymenoptera, Megachilidae) - Development time, brain microstructure, and cognitive abilities"

Grants and fellowships

2009-2011 PhD fellowship from the Universitšt Bayern e.V. (BayEFG)


Radmacher S., Strohm E. (2011) Effects of constant and fluctuating temperatures on the development of the solitary bee Osmia bicornis (Hymenoptera, Megachilidae). Apidologie, Online first, DOI: 10.1007/s13592-011-0078-9

Radmacher S., Strohm E. (2010) Factors affecting offspring body size in the solitary bee Osmia bicornis (Hymenoptera, Megachilidae). Apidologie 41(2): 169-177