Winogradsky column lab page!


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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

Friday, 8 April 2016

Universidad Cádiz_Grupo A6A3_Entry 2: Day 14 - Getting to know our new friends

 Hey there

 As both bottles have been in the same conditions, they have a similar appearance. We will describe them as a whole.
 On the water surface we can observe tiny white algae attached to the bottle. As we descend in the liquid region of the column, we encounter some small snails that possibly feed on the algae mentioned before, as they have survived for 2 weeks.
 The soil’s surface is covered by another type of algae. They are long and white, with a filamentous appearance, presenting bubbles along their structure.
 We decide to divide the soil region in 3 equal parts, as shown in the next picture
-            - In the top layer, S1, we find zones with an intensive orange colour all around and small black clusters in the part of the bottle that wasn’t exposed to direct sunlight. However, we can’t observe any changes to the other side, due to it being in direct sunlight. There is also a great amount of air trapped in the layer. Our hypothesis for the orange colouring is that it is red or purple photosynthetic bacteria.
-            - In the middle layer, S2, the concentration of orange zones reduces as we descend in the column. On the other hand, the black clusters become more numerous and grow in size.
-           - In the bottom layer, S3, we can only distinguish black colonies, with an exception in the border that separates the light and dark zones, where we can still find small orange layers. We think that these black clusters are formed by the H2S produced by sulphur reducing bacteria. As we can’t find orange zones within these clusters, we suppose that H2S is toxic to photosynthetic bacteria 


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