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| When algae grow and increase in numbers, they take nutrients in soluble form out of the water. If one of these nutrients should be absent, their growth is inhibited. In Swedish waters, it is usually nitrogen or phosphorus that disappears first, but new nutrients can reach the sea because of human activities. In that case, algal growth can increase and thereby change the environmental conditions for most organisms living in the sea. Furthermore, this situation can lead to that even more nutrients are released into the water, that otherwise would have been bound to the bottom. Click on the picture to gain further explanations and information. |
