Winogradsky column lab page!

Welcome to the Winogradsky column lab page! Students from the Departments of Biological Applications and Technology, University of Ioannina and Icthyology and Aquatic Environment, University of Thessaly, Greece and the Microbiology course, Faculty of Sciences, University of Cádiz, Spain, discuss their findings on Winogradsky columns they constructed!

If you want to add a post, please feel free to contact the blog administrators (Hera Karayanni, Sokratis Papaspyrou or Kostas Kormas)!

Καλωσορίσατε στη σελίδα των Winobloggers! Διαδικτυακός τόπος συνάντησης φοιτητών, φοιτητριών και διδασκόντων δύο Τμημάτων από την Ελλάδα: Tμήμα Βιολογικών Εφαρμογών και Τεχνολογιών, Παν/μιο Ιωαννίνων και Τμήμα Γεωπονίας, Ιχθυολογίας και Υδάτινου Περιβάλλοντος, Παν/μιο Θεσσαλίας και ενός από την Ισπανία: Σχολή Θετικών Επιστημών, Πανεπιστήμιο του Cadiz. Παρακολουθούμε, σχολιάζουμε, ρωτάμε, απαντάμε σχετικά με τα πειράματά μας, τις στήλες Winogradsky!

Bienvenidos a la pagina web de los Winobloggers! Aquí los estudiantes y profesores de dos departamentos griegos, el Departamento de Aplicaciones y Tecnologías Biológicas de la Universidad de Ioannina y el Departmento de Agricultura, Ictiología y Sistemas Acuáticos de la Universidad de Thessalia, junto con los estudiantes de Microbiología de la Facultad de Ciencias en la Universidad de Cádiz, se reúnen para observar, comentar, preguntar y responder a preguntas relacionadas con nuestro experimento, la columna Winogradsky.

Winogradksy columns

Winogradksy columns
'In the field of observation, chance only favors the prepared mind' Pasteur 1854

Blog posts

Saturday, 9 April 2016


It has been three weeks since we prepared our column.

All the colours have been intensified and we can also distinguish the three parts that we could appreciate the last week.

At the top of the column, there are more algae than the last week.The reason why the algae have grown is due to the sun which provides energy for the photosynthesis. In this part, there are also growing aerobic microorganisms that produce oxygen and organic substrates thanks to the process mentioned previously.

In the middle we can see that the color has turned into light brown.The red regions have become bigger than the last week and we know that this is an indicative of purple non-sulfur bacteria.

At the bottom of the column, there are growing anaerobic bacteria. Above this microorganisms there are sulfur-reducing bacteria who will use sulfate for their anaerobic respiration and they also reduce the sulfate to hydrogen sulfide. When the hydrogen sulfide is combined with iron(II) sulfide, the black colour can be appreciated.

(we forgot to take photos )


  1. Your descriptions seem plausible but some pictures would help!!! Next time I hope.

  2. Very good explanations! And yes, we need to see your pictures, please!