This is because the intertidal zone in the Marine sea shore is submerged or overwhelmed with water during high tide and exposed to the air during low tide. The zone is in different forms which might be from sandy beaches to rocky cliffs. intertidal zone change frequently once or twice every day since it is constantly affected by crashing waves. They have moist temperature,humid air and also high degree of salinity.
A <u>tropical rainforest</u> is an example of an ecosystem with high primary productivity while a <u>desert</u> is an example of an ecosystem with low primary productivity.
