Preface

摘要

In 2007, aquatic ecosystem scientists everywhere were saddened by the passing of two titans of limnology: Dr. Richard A. Vollenweider (January 20, Burlington) and Dr. John (Jack) R. Vallentyne (June 16, Hamilton). It is fitting that the Aquatic Ecosystem Health and Management Society (AEHMS) publish this joint memorial issue. Both scientists made vanguard contributions to resolving the challenge of eutrophi-cation in freshwaters and to establishing the ecosystem approach to management. Jack published The Algal Bowl: Lakes and Man (1974), effectively promoting the rationale and campaign for phosphorus abatement and neutralizing vested opposition. Richard developed his famous phosphorus loading models with their links to primary production and algal biomass, allowing abatement targets to be established. Both worked at the Canada Centre for Inland Waters (CC1W) in Burlington, Ontario. Indeed, it was Jack, along with Wally Johnson, who lured Richard to the Great Lakes to lead the first lake-wide biological investigations of Lakes Ontario and Erie with the Fisheries Research Board (FRB) Detachment. Both exerted major influence on succeeding generations of aquatic scientists. Both were awarded high accolades: Vollenweider the Tyler Environmental Prize (shared with Werner Stumm) and the Naumann-Thienemann Medal (SIL); Vallentyne the A.C. Redfield Lifetime Achievement Award (ASLO) and the Rachel Carson Award (SETC). Both were strong supporters of AEHMS from its inception.