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Posted Thu Mar 12 2009: from Science Daily (US):
Climate Change Reduces Nutritional Value Of Algae
Dutch researchers wanted to know whether an increased CO2 concentration exerted an influence on underwater life. They therefore examined freshwater micro-algae: small, floating and mostly unicellular algae. The experiments were performed in large tanks called limnotrons. These were aerated with ordinary air or with air containing an elevated concentration of CO2. The researchers then examined the ratio between the important elements carbon, nitrogen and phosphorous.... The micro-algae grew faster at a higher CO2 concentration, exactly as the researchers had expected. Yet this growth was also associated with a change in the composition of the algae. The algae cultured at a higher CO2 concentration contained relatively more carbon and relatively less phosphorous. This meant a reduction in the nutritional value, which could have detrimental effects upon the small animals that eat the algae such as water fleas. These in turn form food for fish, for example. As they are the first link in the underwater food chain, the algae ultimately influence the entire ecosystem.
[Read more stories about: climate impacts, carbon emissions, algal bloom]

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'Doc Jim says:
C'mon, with all the algal blooms happening, there'll be lots more for the water fleas to eat!

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