Investigating the Effect of Wave Exposure on the Shell Morphology (Shell Ratio) of Nucella lapillus

This investigation examines whether wave exposure influences the shell ratio (length/operculum width) of Nucella lapillus across two sites with differing Ballantine Exposure Scale (BES) ratings.

The methodology utilizes stratified random sampling of 35 individuals per site, employing Vernier calipers for measurements and a T-test to evaluate statistical significance. Findings revealed that the more exposed site had a significantly higher mean shell ratio (1.28) than the sheltered site (1.10), contradicting the initial prediction.

The exemplar is distinguished by its rigorous statistical approach, detailed analysis of confounding variables, and a nuanced discussion on phenotypic plasticity and predation pressures as alternative drivers of morphology.