2.3.1 In which sandy shore zone will you find the mollusc feeding during high tide? 2.3.2 Describe the water conditions found in the zone named in QUESTION 2.3.1 that are favourable for the organism above - NSC Marine Sciences - Question 2 - 2023 - Paper 2

In the upper shore zone, the water conditions are usually characterized by moderate wave action and little turbulence. This creates a relatively stable environment where the mollusc can feed and thrive, surrounded by nutrients brought in by the tide.

The food chain involves the mollusc as a primary consumer, which feeds on detritus and small organisms. Upon death, the mollusc decomposes, contributing nutrients to the ecosystem. These nutrients support bacterial and fungal growth, which then serve as food for organisms such as worms and other scavengers, ultimately returning nutrients to the cycle of life within the sandy shore ecosystem.