Lake Sevan . Ecological state in the period of water level change” is a unique edition created by a team of authors, which immerses the reader in the world of one of the most amazing natural objects of Armenia. Sevan, known for its beauty and richness of the ecosystem, has attracted the attention of scientists, environmentalists and nature lovers for many years. This book explores not only the body of water itself, but also its ecological state in the face of changes in water levels, which makes it relevant and important for understanding modern environmental problems. The book is an in-depth analysis of the state of Lake Sevan, which for centuries has been influenced by various factors, including climate change, anthropogenic influences and natural disasters. The authors, with a wealth of experience and knowledge in the field of ecology and environmental protection, offer the reader a comprehensive look at how changes in water levels affect the biosystem of the lake, its flora and fauna. They raise important questions about the preservation of a unique ecosystem, about how to preserve the natural heritage for future generations. This book will be of interest to a wide range of readers: from students and graduate students studying ecology and natural sciences, to professionals in the field of environmental protection and anyone interested in natural resources and their conservation. It will also attract the attention of those who love to travel and want to learn more about the natural beauties of Armenia, as well as the challenges faced by unique places such as Lake Sevan. The topics raised in the book go beyond a simple description of the ecosystem. The authors discuss the impact of human activities on natural resources, consider issues of sustainable development and environmental protection. They emphasize the importance of an integrated approach to solving environmental problems, which makes the book relevant not only for specialists, but also for a wide audience seeking to understand how to preserve nature in the face of global changes. The style of the authors is distinguished by scientific accuracy and accessibility of the presentation . They are able to explain complex environmental processes in a simple and understandable language, which makes the material available to readers with different levels of training. This publication is not only informative, but also inspires active action to protect the environment. The Lake Sevan . Environmental status at a time of changing water levels” will become an indispensable source of knowledge for all who are interested in ecosystems, nature conservation and sustainable development. It can serve as a basis for further research and discussion, as well as an inspiration for those who want to contribute to the protection of unique natural sites. If you are interested in topics such as ecology, environmental protection, climate change and sustainable development, then this publication should definitely take place on your bookshelf. It will not only expand your knowledge, but also help to look at nature from a new angle, realize the importance of its preservation and inspire actions aimed at protecting our planet.