Short-term efficiency of epibenthic microbial mat components on phosphorus sorption

Area of Science:

• Environmental Science
• Microbiology
• Marine Ecology

Background:

• Eutrophication of coastal waters is a significant environmental problem.
• Phosphorus (P) is a key nutrient driving eutrophication.
• Microbial mats are proposed as a potential tool for P remediation.

Purpose of the Study:

• To assess the role of living and non-living components of microbial mats in short-term phosphorus sorption.
• To quantify the contribution of microbial activity to P remediation.

Main Methods:

• Microbial mats were collected from Paso Seco coastal flat, Argentina.
• Adsorption experiments were conducted under controlled laboratory conditions.
• Samples were treated to distinguish between living (natural) and non-living (autoclaved) components.

Main Results:

• Active microbial mats exhibited an 8.9-fold higher Freundlich constant for P sorption compared to sandy sediments.
• Natural mats showed significantly higher phosphate removal percentages than autoclaved mats.
• Living microorganisms were estimated to increase P short-term sorption efficiency by approximately 25%.

Conclusions:

• Both living and non-living components of microbial mats contribute to phosphorus sorption.
• Living microorganisms play a crucial role in enhancing short-term P removal efficiency.
• Microbial mats show promise as a bioremediation strategy for eutrophic coastal environments.