Research progress in relationships between freshwater bivalves and algae

Area of Science:

• Aquatic Ecology
• Environmental Science
• Eutrophication Management

Background:

• Freshwater eutrophication is a growing global problem, leading to excessive phytoplankton and reduced benthic algae.
• Bivalves interact with phytoplankton and benthic algae, influencing their density, community structure, and light availability.
• Algal characteristics impact bivalve health, growth, and immunity, creating a reciprocal relationship.

Purpose of the Study:

• To synthesize studies on bivalve-algae interactions and environmental factors.
• To evaluate bivalves as a biomanipulation tool for controlling eutrophication.
• To provide considerations for sustainable bivalve cultivation and biomanipulation implementation.

Main Methods:

• Literature review and synthesis of existing research on bivalve-algae interactions.
• Analysis of factors influencing bivalve filtration and excretion capacity.
• Evaluation of small-scale experiments and ecosystem-level application challenges.

Main Results:

• Bivalve effectiveness in controlling phytoplankton and promoting benthic algae is influenced by their collective filtration/excretion capacity.
• Key factors include bivalve size, species, density, algal quantity/quality, and environmental parameters (temperature, DO, pH, hydrodynamics).
• Small-scale biomanipulation shows success, but ecosystem-level application requires addressing natural conditions, bivalve population dynamics, and ecological disturbances.

Conclusions:

• Bivalve biomanipulation is a promising tool for eutrophication control, but success is context-dependent.
• Sustainable cultivation and careful consideration of ecological factors are crucial for effective implementation.
• Further research is needed to optimize bivalve use in diverse eutrophic freshwater ecosystems.