Managing ecosystem service deficits through ecological-social prioritization

Area of Science:

• Ecology and Environmental Science
• Spatial Sustainability
• Ecosystem Services Assessment

Background:

• Arid and semi-arid regions confront significant challenges in maintaining ecosystem services due to environmental and socio-economic pressures.
• Understanding the intricate social-ecological system dynamics is crucial for achieving spatial sustainability in these vulnerable areas.

Purpose of the Study:

• To develop and apply a comprehensive framework for assessing the supply and demand of eight key ecosystem services in Iran.
• To identify spatial patterns of ecosystem service deficiencies and analyze the drivers of supply-demand mismatches.

Main Methods:

• Integration of spatial analysis, statistical modeling, and Bayesian networks.
• Assessment of eight ecosystem services: forage, water yield, medicinal plants, mushroom, carbon sequestration, pollination, recreation, and aesthetic value.
• Principal Component Analysis (PCA) and statistical analysis to identify key services and stakeholder differences.

Main Results:

• Over 60% of Iran exhibits deficiencies in at least one ecosystem service, with forage (78%) and pollination (75%) being most affected.
• Ecologically, water services and carbon sequestration are critical; socially, water, pollination, and forage are prioritized.
• Synergistic interactions dominate ecosystem service supply (p<0.01), while trade-offs prevail at the demand level (p<0.05).

Conclusions:

• Population, land-use change, and management are primary socio-economic drivers of ecosystem service supply-demand mismatches.
• Medical plant and aesthetic value services show the highest spatial sensitivity to threats (78% and 74%, respectively).
• The integrated framework provides a practical tool for informed decision-making in arid and semi-arid ecosystem management and planning.