The book "Trace Gas Exchange in Forest Ecosystems" provides a comprehensive summary of current knowledge about the exchange of trace gases between forests and the atmosphere, focusing on carbon and nitrogen compounds. It brings together insights from various disciplines of biological and atmospheric sciences and highlights the microbial and plant processes involved in the production and consumption of these trace gases. Additionally, it addresses the exchange processes between forest soils, vegetation, and the atmosphere, as well as the environmental impacts on this exchange. Through this interdisciplinary approach, it establishes a solid foundation for assessing trace gas exchange between forest ecosystems and the atmosphere, as well as the human influences on this exchange.