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, 23 April 2015

Winogradsky column, first post! B3

Hi everyone!

This is our first post about our Winogradsky column and what happened the first month.
Our column was made by sand from river San Pedro's beach, sand from the lake next to the river, starch, iron sulfate (FeSO4), calcium carbonate (CaCO3) and little pieces of filter paper used as carbon.
What we pretend to show is that our sediments are beneficial for sulfurous and ferrous bacterias to grow, as we can see because the color will change.
The first week, we observed that little mollusc were showing their faces, and that the column has started to being clearer.

In the 3th and the 4th weeks, the column didn't change too much because it was raining and the sky was cloudy, so there was no sun for the bacteries to grow. 
Luckily, finishing the 4th week the sun shined again and the column become more red because of the kind of bacteries that metabolise iron. 

The lasts weeks, the column has started to change visibly. The weather these last days had been really sunny and warm, so the column changed because of the heat and light. Looking at the colors, we can see that it has changed to a darker red, even the clear red that was perfectly visible the other week, has turned darker.

The bottom of the column is getting darker too and it seems like it is happening what we expected, anaerobian bacteries (dark colour) ferrous bacteries (red line).


  1. Hi G3,
    I like your warning sign!
    So what gives the black and red color? The bacteria?

  2. This is a very "responsive" column. It's going smoothly, I think!