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, 3 June 2017




Hello again!! Nine weeks ago, we prepared our column and now we can see a lot of changes:

At the bottom of the column we can see a black colour which indicate that there are anaerobic bacteria that reduce the CaSO4 we added.

In the middle of the column, we can see red and green bacteria. They don´t need oxygen. They use the sulfide that comes from CaSO4 reduced.

At the top of the column, there isn´t sulfide, so the microorganisms that we can find there need another source of energy. In this case, the source of energy is the sunlight.

When we talk about microorganisms, we suppose that they are algae and photosynthetic bacteria. They are able to produce O2 which is going to be liberated to the atmosphere.

Finally, we must say that with this experiment we have learnt how microorganisms occupy specific microsites according to their environmental tolerances and their carbon an energy requirements.

                                                                                     Victoria, Andrea, Alessia.

1 comment:

  1. Which photosynthetic bacteria do you know that produce O2?

    You say that in the middle of the column you have red and green bacteria that consume H2S. Actually from the picture you have they do not look like purple and sulfur bacteria. It looks like a mixture of algae and purple non sulfur bacteria.