Which of the following statements about estuaries is FALSE O

Which of the following statements about estuaries is FALSE?

Organisms living in estuaries must have adaptations that allow them to survive variable salinities.

Salinity may vary vertically and horizontally in estuaries.

Marine organisms can move farther into estuaries at high tide.

The diversity of organisms in estuaries is very high.

Estuaries have high productivity.

Solution

Marine organisms can move farther into estuaries at high tide.

Estuaries provide habitats for a large number of organisms and support very high productivity. Estuaries provide habitats for many fishes such as salmon and sea trout, migratory bird populations, such as the black-tailed godwit.

Two of the main challenges of estuarine life are the variability in salinity and sedimentation.The most important variable characteristics of estuary water are the concentration of dissolved oxygen, salinity and sediment load. There is extreme variability in salinity. Many species of fish and invertebrates have various methods to control or conform to the shifts in salt concentrations.