The book “Diatom algae of reservoirs and watercourses of Karelia”, created by the team of authors, is a unique study that immerses the reader in the world of microscopic organisms living in reservoirs and rivers of this picturesque region of Russia. Karelia, known for its clean waters and diverse flora, is becoming an ideal backdrop for studying diatoms, one of the most important components of the ecosystem. This book will be of interest not only to specialists in the field of biology and ecology, but also to everyone who is passionate about nature, water exploration and environmental protection. Students, graduate students, teachers and nature lovers will find in it a lot of useful information that will help to better understand how aquatic ecosystems function and what role diatoms play in them. The book deals with various types of diatoms, their morphology, ecology and distribution in the waters of Karelia. The authors share the results of their research, which have been conducted over the years, and offer the reader a unique look at how these organisms affect water quality, biodiversity and ecosystem health. Each section of the book is filled with detailed descriptions, illustrations and photographs, which makes the material accessible and understandable even for those who do not have a special education. The topics raised in the book go beyond the mere description of species. The authors discuss the impact of climate change on aquatic ecosystems, pollution problems, and their implications for diatoms. This makes the book particularly relevant in light of contemporary environmental challenges. Readers will be able to learn how changes in the environment affect the lives of algae and, accordingly, the entire ecosystem. The style of the authors is distinguished by scientific rigor and at the same time the availability of presentation . They skillfully combine facts with fascinating observations, which makes reading not only informative, but also fascinating. The team of authors includes both experienced scientists and young researchers, which gives the book freshness and diversity of views. If you are interested in ecology, biology or just want to learn more about how water bodies function, this book will be a real find for you. It will not only expand your knowledge of diatoms, but will also inspire further research and care for nature. “Diatom algae of reservoirs and watercourses of Karelia” is not just a scientific publication, but a real guide to the amazing world of microscopic organisms that will help you see familiar reservoirs from a completely new angle. This book will be an excellent addition to the library of everyone who appreciates nature and seeks to understand it deeper. If you are looking for literature on ecology, biology, environmental protection or just want to learn more about the flora of Karelia, do not miss the opportunity to get acquainted with this wonderful book. It will be your reliable companion in the study of aquatic ecosystems and their inhabitants.