1 Wetland Functioning in a Changing World: Implications for Natural Resources Management J.T.A. Verhoeven, B. Beltman, D.F. Whigham, R. Bobbink 1.1 Introduction 1.2 Clarity on Wetlands and Water Use 1.3 Wetlands and Environmental Flows 1.4 Wetlands and Water Quality 1.5 Biogeochemical Insights 1.6 Wetlands and River Fisheries 1.7 Wetlands and Climate Change 1.8 Further Developments in Wetland Science and its Applications References Section I The Role of Wetlands for Integrated Water Resources Management: Putting Theory into Practice 2 Restoring Lateral Connections Between Rivers and Floodplains: Lessons from Rehabilitation Projects H. Coops, K. Tockner, C. Amoros, T. Hein, G. Quinn 2.1 Introduction 2.2 Threatened Life at the Aquatic--Terrestrial Interface 2.3 Reconnecting Side-Channels Along the Rhône (France) 2.4 Rehabilitation of Side-Channels of the River Danube (Austria) 2.5 `Environmental Flows¿ for Rehabilitating Floodplain Wetlands (Australia) 2.6 Lessons from Rehabilitation Projects References 3 Sustainable Agriculture and Wetlands F. Rijsberman, S. de Silva 3.1 Agriculture and Wetlands: Introduction 3.2 Water for Food, Water for Environment 3.2.1 'Ecosystems Produce the Water Used by Agriculture' 3.2.2 'Irrigated Agriculture Uses 70% of the World¿s Water' 3.2.3 'Water Scarcity: Fact or Fiction?' 3.3 Producing More Rice With Less Water 3.4 Towards a Dialogue Among Agronomists and Environmentalists 3.4.1 Water, Food and Environment Issues in Attapeu Province, Lao PDR 3.5 Research on Sustainable Agriculture and Wetlands 3.6 Conclusions: Towards Sustainable Agriculture and Wetlands? References 4 Sustainable Water Management by using Wetlands in Catchmentswith Intensive Land Use C. Yin, B. Shan, Z. Mao 4.1 Semi-Natural Wetlands Created by Humans Before the Industrial Age 4.2 Water Regulation by the Multipond Systems 4.2.1 Research Site Description 4.2.2 The Regulation Process for the Crop Water Supply by the Pond System 4.3 Other Ecological Functions of Ancient Semi-Natural Wetlands in a Modern Scientific Context 4.3.1 Sediment Retention Within the Watershed 4.3.2 Nutrient Retention and Recyling 4.3.3 Landscape Complexity and Biological Diversity 4.4 Wetlands and Human Activities in Harmony 4.5 Protection of Semi-Natural Wetlands Together with Natural Wetlands References Section II Wetland Science for Environmental Management 5 Constructed Wetlands for Wastewater Treatment J. Vymazal, M. Greenway, K. Tonderski, H. Brix, Ü. Mander 5.1 Introduction 5.2 Free Water Surface Constructed Wetlands 5.2.1 Free Water Surface Wetlands for Treatment of Wastewater and Non-Point Source Pollution in Sweden 5.2.2 The Role of Wetlands in Effluent Treatment and Potential Water Reuse in Subtropical and Arid Australia 5.3 Constructed Wetlands with Horizontal Sub-Surface Flow 5.4 Constructed Wetlands with Vertical Sub-Surface Flow 5.4.1 Danish Experience with Vertical Flow Constructed Wetlands 5.4.2 Constructed Wetlands with No Outflow 5.5 Hybrid Constructed Wetlands 5.6 Trace Gas Fluxes from Constructed Wetlands for Wastewater Treatment 5.7 Conclusion References 6 Tools for Wetland Ecosystem Resource Management in East Africa: Focus on the Lake Victoria Papyrus Wetlands S. Loiselle, A. Cózar, A. van Dam, F. Kansiime, P. Kelderman, M. Saunders, S. Simonit 6.1 Introduction 6.2 Wetlands and Inorganic Carbon Retention 6.3 Wetlands and Nutrient Retention 6.4

The two volumes on ¿Wetlands as a Natural Resource¿ in the book series Ecological th Studies (Volumes 190,191) are based on the highlights of the 7 INTECOL International Wetland Conference in Utrecht,25¿30 July 2004. This conference brought together about 900 participants from 61 countries,who discussed a very broad range of science-,poli- and management-oriented issues related to wetland ecology and hydrology, wetland conservation and creation, the impact of global change and wetlands as a resource in terms of food,flood protection and water quality enhancement. The participants were from different sectors of society,i. e. ,science and technology (scientists 45%; PhD s- dents 20%),natural resource management (20%) and policy (15%). There were 38 s- posia with invited speakers centered around the nine conference themes. We have given the organizers of these symposia the opportunity to produce one chapter for these books with the integrated content of their symposium. This has resulted in 25 chapters, of which 13 are included in Volume 190 under the heading ¿Wetlands and Natural Resource Management¿and 12 in Volume 191 under the heading ¿Wetlands: Functi- ing,Biodiversity Conservation and Restoration¿. With these books,we had the aim to summarize the most important recent scientific results in wetland science,their applications in wetland and water resource management and their implications for the development of global,national and regional policies in the perspective of the ever-progressing deterioration of natural wetlands and the major impacts that future climate change will have.