Experiments under the ice

P1020135 As well as sampling the lake, we have set up some experiments to simulate how nutrient enrichment might affect Lake Baikal phytoplankton.

P1020125

We have enclosed algae in two-litre mesocosm bags and spiked them with different combinations of nitrogen, phosphorus and silicon.

P1020132

We will leave the algae to grow for one week before harvesting and testing to see whether nutrient enrichment has changed the types of species that grow.  We will also analyse the algal material from the experiment to see whether silicon enrichment or depletion influences the silicon isotope ratios; this should help us to interpret what the changes in the sediment core material are telling us.

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