Marco Roos Associate professor Name Dr. M.C. Roos Telephone +31 71 527 2727 E-mail m.c.roos@biology.leidenuniv.nl News 17 June 2019 Counting plants and small freshwater creatures for citizen science 02 June 2009 Plant species disappear and reappear Associate professor Science Instituut Biologie Leiden IBL onderwijs Contact +31 71 527 2727 m.c.roos@biology.leidenuniv.nl Publications No relevant ancillary activities