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

Thursday, 19 May 2016

UCA_GroupA2_Day 63_Rio San Pedro sediment + 1,5 g FeSO4 + paper_(column exposed to sunlight)

It has been sixty three days  since we prepared our column.

Unfortunately, we can not appreciate many changes since the last day we checked it.
At the top of the column we can see that the number of algae has decreased, one of the reasons could be that the column was not totally exposed to the sunlight, so, if there is not sunlight, there is no photosynthesis and due to this, the algae can not grow.

In the middle,green regions have become bigger than the last day so this indicate us that the cyanobacterias have grown more. When there is not oxygen, the  SO42-  can be used as a last electron acceptor. The red regions have also increased the size.

At the bottom, we can see that there are not any changes, the black color is the same.


  1. Changes from now on will be slower... but the column will be alive for many many more months... years... The oldest Winogradsky column I have ever seen was set up in 1967 and it is still changing colours!

  2. Careful! The green areas are not green sulfur bacteria. Just algae and cyanobacteria.

    1. ok, we have changed it.

    2. Thumbs up!
      Green sulfur bacteria need a lot of H2S and grow where the column is pitch black. In all of your columns have not seen any but I will post some pictures from a column we have prepared in my lab.