Litter behaviour on Mediterranean cobble beaches, SE Spain.

Area of Science:

• Marine pollution
• Coastal ecology
• Environmental science

Background:

• Coastal litter is a significant environmental issue globally.
• Understanding the movement and fate of litter on beaches is crucial for effective management.
• Previous research has focused on litter quantities, but less on its dynamic processes.

Purpose of the Study:

• To investigate the dynamics of litter inputs on Mediterranean cobble beaches.
• To identify the primary drivers of litter movement and accumulation.
• To assess the contribution of different sources to beach litter.

Main Methods:

• Biweekly litter tagging over three months during winter on five Spanish cobble beaches.
• Monitoring litter inputs, outputs, burial, and exhumation processes.
• Material analysis to identify dominant litter types.

Main Results:

• Plastic was the dominant litter material, accounting for 77% of inputs.
• Storms were a major driver of litter dynamics in remote/narrow beaches, influencing both accumulation and removal.
• Rural beaches showed significant litter input from beach users, including fishers and tourists.
• Litter burial and exhumation were commonly observed processes.

Conclusions:

• Storms and human activities are key factors influencing coastal litter dynamics.
• Effective beach management requires addressing both natural forces and anthropogenic inputs.
• Further research and targeted actions are needed to mitigate coastal litter pollution.