ASYMMETRICAL DEVELOPMENTAL PLASTICITY IN AN INTERTIDAL SNAIL

Area of Science:

• Marine Biology
• Ecology
• Evolutionary Biology

Background:

• Intertidal organisms face environmental challenges, including wave action.
• Phenotypic plasticity allows organisms to adjust traits in response to environmental changes.
• The adhesive abilities of intertidal snails are critical for survival.

Purpose of the Study:

• To investigate variation and phenotypic plasticity in the adhesive abilities of Nucella lapillus.
• To determine the role of pedal surface area in resisting dislodgement in different wave-energy environments.
• To explore the underlying mechanisms of adaptation to wave action in intertidal snails.

Main Methods:

• Field and laboratory experiments were conducted.
• Measurements of pedal surface area and dislodgement resistance were taken.
• Reciprocal-transplant experiments were performed to assess plasticity.

Main Results:

• Snails from high-wave-energy environments had larger pedal surface areas and greater resistance to dislodgement.
• Pedal surface area variation was due to phenotypic plasticity, not genetic differentiation.
• Transplant experiments revealed asymmetric plasticity in response to wave action intensity.

Conclusions:

• Pedal surface area in Nucella lapillus is a plastic trait influenced by water turbulence.
• The snail's adaptation to wave action is asymmetric, potentially reflecting differential acclimation risks.
• Phenotypic plasticity is a key mechanism for intertidal organisms to cope with environmental variability.