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

Tuesday, 12 April 2016

UCA_3B-7B_3: Day 28 - A snail inside our column???

Rio San Pedro sediment + 0.20 g CaSO4 + filter paper

Column exposed to sunlight

We can now appreciate how different microorganisms have developed depending on how different the conditions were (light, O2 availability...).

First of all, let's talk about the light side. We can see how a sort of greenish colour appears due to the presence of photosynthetic organisms. In the upper part this is caused by the growth of green algae, whereas we move down, the coloration is a result of the cianobacteria more than algae. Several bubbles got trapped in the crannies of the bottle's wall (this demonstrates that photosynthesis is happening here).

On the other hand, the dark side shows black coloration. Only those microorganisms capable of obtaining energy from redow reactions grow here (these organisms are probably lithotrophic). We can find sulphurous bacteria (thanks to the sulphur hydride), oxidative bacteria (responsible of the coppery limits between the light and the dark side) and some more.

Surprisingly, we found an intruder!! There is a little snail living inside our column!

Column that developed without light

We observe how that black colour at the bottom has gotten even darker. And, just like it was two weeks ago, as we go up in our column, that black colour gradually turns to a grey that becomes a little lighter.

At the top of our column, that iron oxyde (which presented a dark orange colour) layer we spoke about the last time got even thicker.

The water layer has not changed on the past two weeks.

Stay tuned for more news!

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