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, 22 June 2017

UCA_3A_3:Day 98 - This is not the end!

Finally, the Winogradsky column illustrates how different microorganisms perform their interdependent roles: the activities of one organism enable another to grow, and vice-versa. These columns are complete, self-contained recycling systems, driven only by energy from light.

We added a lot of salt in our column because we wanted halophilic bateria to grow but they didn`t.

Instead of that, they have grown cyanobacteria (indicated by the Green color) and photoheterotroph bacteria (indicated by the orange color produced by the iron oxide).

The white color is due to the production of hydrogen sulphide precipitate produced by purple sulfur bacteria, which use H2S instead of H2O as reducing agent so they don’t produce O2 (they do anoxigenic photosynthesis).

Due to the initial conditions, we suppose that halophilic bacteria will grow because of the amount of sat we added.
But this is not the end, a lot of microorganisms can grow in our column in summer!

1 comment:

  1. How do you know that halophilic bacteria did not grow? What did you expect to see?