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, 2 April 2015

Cadiz, 6B: Winogradsky column. Fourth week. B6 group.

Hello, bloggers:

It's been four weeks since this experiment began. The changes come slowly, but our mini ecosystem evolves.

I remind you that our Winogradsky column contains a mixture of muddy sediment from San Pedro river and muddy sediment from a hypersaline pond. Moreover, we added Enrichments as: CaCO3, FeSO4 and NaCl (salt).

Since our last publication, surface aqueous medium has become a blue-green color, and greenish solid particles have appeared on it . It also notes that the diversification of the mud color is appearing. At the top the color is slightly lighter, with greenish tones, while in the background has a darker, reddish color.
These are the changes that have occurred in the area of ​​exposure to light.
The area where the light does not reach has remained largely unchanged. Black spot we indicated in the above publication are maintained.

Each color is caused by the activity of different bacteria:
The bluish-green color of the upper zone indicates the presence of cyanobacteria.
The red color comes from purple non-sulfur bacteria.
The black spots are due to the reaction of H2S released by bacteria with soil iron.

Here you have some pictures of how the column is now.

                                              Light side                                      Dark side

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