This book presents a detailed case study of ecological and cultural interactions between the people and their natural environment at Roviana Lagoon, Solomon Islands, a land of rich biodiversity. This volume documents the subsistence lifestyle of the people and their indigenous ecological knowledge, analyzes the effects of recent socioeconomic changes on the people and ecosystem, and proposes future directions for sustainability. The contents have been designed to answer questions such as, What kinds of factors have determined whether current human actions are sustainable or will result in a collapse of biocultural diversity in the Solomon Islands?; zHow do Solomon Islanders recognize nature and biodiversity conservation in traditional ways or under socioeconomic changes?; and zHow can harmony between humans and nature be achieved in the Solomon Islands under changing socioeconomic conditions? A truly transdisciplinary approach is applied, integrating theories of human ecology, quantitative ethnobiology, and folk ecology and methods of vegetation surveys, ethnographic fieldwork, remote sensing, and health surveys, in order to link different domains of humans and the natural world. In addition, this work focuses on the importance of understanding of diversity not only in natural environments, but also in human societies, and will be a valuable source for many, especially ecologists, anthropologists, conservation practitioners, and rural development planners.