During the flowering period of freshwater ponds and shallow reservoirs, the mass of algae reaches 2 kg / m3, sometimes 7 kg / m3

During the flowering period of freshwater ponds and shallow reservoirs, the mass of algae reaches 2 kg / m3, sometimes 7 kg / m3. In the Arctic seas, the mass of phytoplankton reaches 14 g / m3, and in the Azov seas – 270 g / m3. Work in pairs, suggest and discuss hypotheses explaining the difference in the mass of algae in these bodies of water

For the rapid development of algae, shallow water (an abundance of light), an abundance of minerals, and warmth are needed. In the arctic, the water temperature is low, deep and low salinity (a small amount of salt), therefore, conditions for algae are less comfortable here, because there are few of them here 14g / cu. m. In shallow water bodies there is a lot of light, mineral drains from fields and meadows, a lot of light and heat, therefore, algae in such favorable conditions multiply in a huge amount of 2 kg / cubic meter, m.

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