There is a growing need for appropriate management of aquatic plants in rivers and canals, lakes and reservoirs, and drainage channels and urban waterways. This management must be based on a sound knowledge of the ecology of freshwater plants, their distribution and the different forms of control available including chemical, physical, biological and biomanipulation. This series of papers from over 20 different countries was generated from the highly successful European Weed Research Society symposia on aquatic plant management, this being the ninth. The contributions provide a valuable insight into the complexities involved in managing aquatic systems, discuss state-of-the-art control techniques such as biomanipulation using fish and waterfowl and the use of straw, and deal with patterns of regrowth and recovery post-management. Careful consideration is given to the use of chemicals, a practice which has come under scrutiny in recent years. Underpinning the development of such control techniques is a growing body of knowledge relating to the biology and ecology of water plants, including growth responses under different trophic conditions, the impact of pollution, and aspects of photosynthesis. The authorship of the papers represents the collective wisdom of leading scientists and experts from fisheries agencies, river authorities, nature conservation agencies, the agrochemical industry and both governmental and non-governmental organisations.

Aquatic weeds cause serious problems in water bodies throughout the world. They can, for example, block irrigation and drainage channels, interfere with fisheries, hinder navigation, and have environmentally undesirable effects on fresh-water ecosystems. The problems are most severe in tropical and subtropical countries, but they occur almost everywhere. The management of aquatic weeds poses special problems of its own. The main difficulty is to balance effective treatment against the undesirable side-effects that control operations may have on the ecosystem. This book, which is published for the European Weed Research Society, provides a detailed overview of the ecology and management of aquatic weeds, as well as the present status of aquatic weed problems in various continents. The environmental consequences of aquatic weed control measures are discussed in detail. The book will be of special interest to weed scientists, ecologists, agriculturalists, extension personnel, policy makers, and students.

There is a growing need for appropriate management of aquatic plants in rivers and canals, lakes and reservoirs, and drainage channels and urban waterways. This management must be based on a sound knowledge of the ecology of freshwater plants, their distribution and the different forms of control available including chemical and physical, and biological and biomanipulation. This series of papers from over 20 different countries was generated from the tenth in the highly successful series of European Weed Research Society symposia on aquatic plant management, this being the tenth. It provides a valuable insight into the complexities involved in managing aquatic systems, discusses state-of-the-art control techniques and deals with patterns of regrowth and recovery post-management. Careful consideration is given to the use of chemicals, a practice which has come under scrutiny in recent years. Underpinning the development of such control techniques is a growing body of knowledge relating to the biology and ecology of water plants. The authorship of the papers represents the collective wisdom of leading scientists and experts from fisheries agencies, river authorities, nature conservation agencies, the agrochemical industry and both governmental and non-governmental organisations.

The recent financial crisis has created a public outcry over top-executive pay packages and has led to calls for reform of executive pay in Europe and the US. The current controversy is not the first - nor will it be the last - time that executive compensation has sparked outrage and led to regulation on both sides of the Atlantic. This volume compares US and European CEOs to trace the evolution of executive compensation, its controversies and its resulting regulations. It shows that many features of current executive compensation practices reflect the, often-unintended, consequences of regulatory responses to perceived abuses in top-executive pay, which frequently stem from relatively isolated events or situations. Regulation creates unintended (and usually costly) side effects and it is often driven by political agendas rather than shareholder value. Improvements in executive compensation are more likely to come from stronger corporate governance, and not through direct government intervention. The volume also examines the effects of incentive schemes and the patterns of performance related pay both within and across countries. It documents a number of empirical regularities and discusses whether government should intervene to support the implementation of incentive pay schemes. It argues that it makes little sense to undertake reform without detailed simulations of the effect on the economy under alternative economic scenarios, based on sound analysis and extensive discussion with labour, management, and government decision-makers.