Hans Krüse

profile picture Hans Krüse

As a retired ecologist, living in Alphen a/d Rijn, I was looking for a place where I could do something with my experience and knowledge. Naturalis is nearby and offered the opportunity to become a guest researcher for about 8 hours a week. Green roofs is my main field of research. I am curious if it is possible to improve the quality of extensive green roofs for pollinators by adding (seeds of a selection of) attractive flowers. In may 2021 I have set up a test roof on my garage.

Apart from this “job”, I am involved in a community garden in my neighbourhood and in nature management of a small terrain in Alphen a/d Rijn. 

I studied Biology (major: ecology) at the VU, Amsterdam (1970-1979). The alternative military service at an environmental federation turned out to be a good basis for a job at the Province of South-Holland. 20 years later I switched to Vogelbescherming Nederland (Birdlife the Netherlands) and the last ten years (2008-2018) I worked at the city of Utrecht as an urban ecologist.


Green roofs, green buildings, biodiversity, urban ecology

Hans Krüse

Guest researcher
NL Biodiversity and Society



Improve biodiversity on extensive green roofs.


  • Green roofs
sedum roof
herbaceous grassland