Multi-criteria decision analysis applied to harmful algal bloom management: A case study

Area of Science:

• Environmental Science
• Ecology
• Water Resource Management

Background:

• Harmful algal blooms (HABs) are increasing in frequency and severity, causing significant economic losses and ecosystem damage.
• Human activities like eutrophication and altered hydrology exacerbate HABs.
• Effective HAB mitigation requires balancing efficiency, environmental and social impacts, costs, and stakeholder priorities.

Purpose of the Study:

• To propose a Multi-Criteria Decision Analysis (MCDA) framework for HAB management.
• To analyze stakeholder perspectives on key HAB mitigation considerations.
• To demonstrate the application of MCDA in a hypothetical HAB-affected lake scenario.

Main Methods:

• Utilized a Multi-Criteria Decision Analysis (MCDA) framework.
• Incorporated four primary considerations: human health, environmental impact, social impact, and technical feasibility.
• Applied the framework to a case study of a lake experiencing HABs.

Main Results:

• The MCDA framework allows for systematic evaluation of different HAB management strategies.
• Stakeholder priorities can be quantitatively integrated into decision-making processes.
• The case study illustrates how diverse stakeholder values influence the selection of mitigation alternatives.

Conclusions:

• MCDA provides a structured approach to navigating complex HAB management decisions.
• Integrating stakeholder perspectives is crucial for successful and sustainable HAB mitigation.
• This framework aids in balancing competing interests for effective HAB control and ecosystem health.