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

Monday, 28 November 2016

Tampakidou Maria-Ioanna Mpelonias Fivos University of Ioannina



Team 4 

Tampakidou Maria-Ioanna, 1479, Mpelonias Fivos, 1178 University of Ioannina 

5th-6th week observation:  11/11/2016 - 18/11/2016 

       The winograsky column-1 (contains eggs and it is closed) on the right has dark-black color that surely reveals anoxic conditions in the water. This is a sign of the presence of sulfate reducers and methanogens (archae). This column contains a lot of sulfide and very sandy sediment that allow the sulfide to diffuse easily into the bulk of the column, and as a result is anaerobic throughout. In addition, there are a lot of organics (great amount of eggs and paper) that make the decomposers increase. Many decomposers use sulfur, ferum and other kinds of anorganic matterials to oxidate organic matter and produce energy. In some of these reactions  there are byproducts such as hydrogen sulfide (H2S) and methane CH4 that cause the black color of the water. 
      On the other hand, in the winograsky column-2 (contains plasters and it is open) the water isn’t still clear anymore. It has been light green which is a sign of photosynthetic conditions. There is definatelly  some green algae and cyanobacteria , we can also see the biofilm which is products of microorganism witch after  the live there. Moreover, there are some organisms swimming in the water. They could be eterotrophs  and consume the autotrophs and their byproducts. Some of them have overall shape .The mud, is still totally black in some points and in some others is orange-red. It is a proof of red sulfur bacteria that finally are really observable. In the same time, the black spot are becoming bigger as sign of sulphur reducing bacteria such as Desulfovibrio that use products for anaerobic respiration using sulphates producing lots of H 2SThis H 2S will react with any iron producing black ferrous sulphide.