The book "Wastewater Treatment, Plant Dynamics and Management in Constructed and Natural Wetlands" offers a comprehensive analysis of the use of constructed wetlands for wastewater treatment. It highlights the development and dynamics of this technology, which has gained importance since the 1980s. The International Water Association has recognized the relevance of wetlands for wastewater treatment and promotes the exchange of knowledge and experiences in this field. The work is based on insights from various workshops that brought together researchers from around the world to discuss the role of natural and constructed wetlands. Both technical and ecological aspects that are crucial for the effective use of these systems are addressed. The collected contributions provide valuable insights into the functioning and management of wetlands, which are of great significance for water conservation and environmental protection.