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, 9 June 2016

GROUP 7B: our last comment!

After a while we haven´t noticed many more changes. But now we can appreciate how this tiny ecosystem has developed showing us the different organisms that cohabit inside the bottle.
Firstly, it´s evident that there is something going on in the upper part because of the turbidity of the water. This is due to the presence of microalgae and cyanobacteria living in there.
In the surface of the mud we can find multicellular algae which have been growing and spreading where they can find oxygen and light, that is the surface on the enlightened side. Next to them, heterotrophic bacteria have stablishes thanks to the availability of nutrients provided by th photosynthetic algae.
We can also observe as we move to the bottom or the dark side that colouration varies greatly. This is an effect of the lack of light and the increasing concentration of sulfides. This allows chimiotrophic bacteria to grow. There is a huge variety, ranging from purple sulfure bacteria, oxidizing bacteria, sulfate reducing bacteria... All these use redox reactions to fuel their metabolism.
Apart from all, this, as a personal experiment, we inserted some yeast extract. What we expect ir a growth of the heterotrophic organisms which will consume all new organic matter until there is no more.

Group 7B, Biotechnology, UCA, Spain

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