Ecological risk assessment is defined as the monitoring of ecological resources to calculate changes and hazards faced by the ecosystems. Long-term damage can lead to larger sections of wildlife and flora being adversely affected. Models of risk assessment to deal with concrete effects that can be assessed as well as theoretical foresight that can be analyzed. This book on ecological risk assessment discusses the various models of ecological assessment and its relation to the severity of risk that is posed. From theories to research practical applications, case studies related to all contemporary topics of relevance of this field have been included in this book. It is a compilation of chapters that discusses the most vital concepts and emerging trends in the field of ecological risk assessment. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of the subject.