Bryan M. Spears - Böcker

Nutrient enrichment of lakes is a ubiquitous problem, impacting ecological and human health on a global scale by accelerating the pace of eutrophication, often resulting in algal blooms, depleted dissolved oxygen concentrations, and economic harm to surrounding communities. In many lakes, bed sediments are a major but unrecognized source of phosphorus to the water, a process known as internal phosphorus loading. Internal loading is notoriously difficult to measure and manage given the need to access processes operating on and within the lakebed. In addition, climate change threatens to promote internal loading. For example, warming of lakes can increase the release of phosphorus from sediments due to 1) longer and stronger periods of lake stratification resulting in sediment anoxia and 2) enhanced microbial decomposition of organic matter. Degraded water quality not only impairs ecological health but also can influence social pride and community morale. This is the first book dedicated to the understanding of internal phosphorus loading in lakes and examines the causes, the ecological and societal impacts, and options for managing this complex phenomenon. With contributions from leading experts, this edited volume provides a broad view of internal phosphorus loading, methods for measurement, management practices for water quality improvement, case studies from around the world, and recommendations for addressing this growing concern. It is essential reading for environmental and engineering professionals involved in lake and reservoir management, students and faculty in limnology, state and federal authorities involved in water quality regulation, and lakefront homeowners and management boards interested in maintaining lake water quality and managing algal blooms.Key Features:First-ever comprehensive volume on internal phosphorous loading that clearly details what it is and why it occursIdentifies and explores the drivers of internal phosphorus loadingProvides methods, techniques, and models for measuring internal phosphorous loadingFeatures over 150 color figures and photographs to illustrate important concepts and proceduresIncludes 17 detailed case studies written by experts from around the world to highlight key research principles, treatment options, and management strategies for major lakes affected by internal phosphorus loading

Shallow lakes are important for their amenity value and the ecosystem services that they support. However, many are located in areas of high population density and intensive farming activity. As such, they are subject to many stressors, including eutrophication and climate change. This book examines 40 years of data from Loch Leven, a shallow lake in the lowlands of Scotland, UK, to gain a better understanding of the links between pollution, climate change and ecological response at the landscape scale. A wide range of topics is presented, including long term changes in nutrient inputs, internal phosphorus loading, water quality, algal concentrations, and the biodiversity of macrophytes, zooplankton, benthic invertebrates, fish and waterfowl. The book provides evidence that attempts to improve ecosystem services at this site in the past have often resulted in unintended consequences for the lake and the local community.  It concludes that successful management actions in the future are likely to be those that incorporate lessons learned from previous decisions. This book will be of great interest to freshwater ecologists working in the field and managers responsible for the protection and monitoring of natural areas. It is also suitable as a supplementary text for courses in freshwater science and environmental management​