SCIENCE ALIVE!

"Lemna Minor" or "Duckweed" - What is it, and why do we provide this item for our schools?

The common duckweed, whose scientific name is Lemna minor, grows on the surface of water as a free-floating plant. One of the most interesting facts is that it lacks stem, leaves, and roots (in some species), which are characteristic features of a true flowering plant. Though it causes some potential problems in ponds and other freshwater bodies due to rapid growth, this aquatic plant has several benefits.

If you notice small green plants that cover the surface of garden ponds or stagnant swamps, most likely it's duckweed. Mostly adapted in stagnant water bodies like swamps or ponds, it can also grow in slow-moving or quiet streams.

INTERESTING FACTS ABOUT DUCKWEED

• It is a source of food for water fowl and many other aquatic inhabitants.

• It contains more than 35 percent protein and many other plant pigments and trace minerals.

• According to researchers, duckweed doubles it amounts within two days, provided that the organic nutrient content is high, and growth conditions are favorable.

• Duckweed in the wild if not controlled will cover the water surface and block sunlight. As a consequence, aquatic plants, insects, and fish are deprived of light. Also, the oxygen supply is reduced significantly, which over time, causes the fish to suffocate and die.