Dr. Petra Werner

Do you need a diatomist? You have come to the right place.
I have years of experience using benthic and planktonic diatoms as bio-indicators (References, Curriculum Vitae), e.g. to implement the European Water Framework Directive and in paleolimnology (Publications).

I would love to offer you a quotation, if you need someone to


  • prepare your samples,
  • identify and count your diatoms and
  • to analyse and report the results (Contact).


For diatom identification I use the microscope “Axio Scope.A1” from Zeiss with a 100x magnifying objective „Plan-Apochromat“ (numerical aperture of 1.4), differential interference contrast (DIC), the camera “AxioCam ICm1” and the following identification literature:

  • Bibliotheca Diatomologica (e.g. Vol. 29, 36 and 37)
  • Cantonati, M., Kelly, M. G., Lange-Bertalot, H. (eds.). 2017: Freshwater Benthic Diatoms of Central Europe: Over 800 Common Species Used in Ecological Assessment. Koeltz Botanical Books.
  • Diatoms of Europe (e.g. Vol. 1-6, 8-9)
  • Diatom Monographs (e.g. Vol. 13)
  • Hofmann, G., Werum, M., Lange-Bertalot, H. 2011. Diatomeen im Süßwasser-Benthos von Mitteleuropa. Bestimmungsflora Kieselalgen für die ökologische Praxis. Über 700 der häufigsten Arten und ihre Ökologie. A.R.G. Gantner Verlag K.G., Rugell.
  • Iconographia Diatomologica (e.g. Vol. 2, 7 and 8)
  • Reichardt E. 2018. Die Diatomeen im Gebiet der Stadt Treuchtlingen. Band 1 & 2. Bayerische Botanische Gesellschaft.
  • Süßwasserflora Vol. 2/1-4