What Are Ecosystem Services?

What Is Water Purification?
Streamside (Riparian) Plant Communities
Wetlands
Hydrology

Pollutants and How They Are "Purified"
Nutrients
Pesticides and Herbicides
Pathogens
Salt, Sand, Petrochemicals and Heavy Metals
Excessive Sedimentation
Thermal Pollution

Can We Put a Value on Water Purification?
Replacement Cost
Wastewater Treatment
Constructed Wetlands
Chemical Cleaners
Health
Recreation/Quality of Life










What Are the Threats? What Are the Solutions?
Pollution
Water Diversion
Wetland and Riparian Zone Loss
Riparian Areas
Resources
Planning

Research Needs

Conclusions

Sources

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