Question

Estuaries are considered as nutrient trap due to the mixing of

• A. River and sea water
• B. Pond and lake
• C. Lake and river
• D. Ocean and pond

Answer 1

The correct option is A River and sea water

An estuary is tidal mouth of river or coastal bay, where mixing of fresh and sea water occurs. An estuary is highly productive due to turbulence. There are fluctuations in temperature and salinity. Dominant life forms are phytoplanktons (blue green alga, green algae, diatoms, Dinoflagellates), zooplankton (Protozoans, Crustaceans, Rotifers), Necton (fishes and some Crustaceans) and Benthon (attached algae, snail, clams, prawn etc.).