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Today, I collected water samples to study the diversity of cyanobacteria found in the water column of Lake Fryxell.  The water is sampled through a hole in the ice. We are very lucky the hole is covered by a heated tent, which makes it a lot easier. 

 

The phytoplankton biomass is concentrated on a filter. Some of the filters turned orange and brown because of the pigments of the phototrophic microbial community. After my return to the NHM, I will extract the DNA in order to characterise the cyanobacterial diversity.

 

Water sampling

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Niskin bottle

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Water filtration set-up

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Water filter coloured by the pigments of the phototrophic microbes in Lake Fryxell water

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.....and a little quiz: What is wrong in the following pictures?

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