In northern Thailand, Laos, and southern China, marginal fishing communities along the Mekong River and its tributaries are seeing the adverse effect of changing ecosystems on their fish stocks, local economies, lifestyles, and cultural practices. Transnational mega-projects are causing great environmental degradation and increased vulnerability to people?s livelihoods. While depicting a stark future for less advantaged Mekong communities, this book sees reasons for hope in the communities? capacity to respond to these changes.