A toolbox for assessing the ecological water requirements of groundwater dependent ecosystems in Australia / R.S. Evans [and others] -- Water table dynamics of a severely eroded wetland system, prior to rehabilitation, Sand River Catchment, South Africa / E.S. Riddell [and others] -- Small-scale water- and nutrient-exchange between lowland River Spree (Germany) and adjacent groundwater / J. Lewandowski & G. Nèutzmann -- Artificial maintenance of groundwater levels to protect carbonate cave fauna, Yanchep, Western Australia / C. Yesertener -- Spatial and temporal heterogeneity in the flux of organic carbon in caves / K.S. Simon, T. Pipan & D.C. Culer -- The influence of groundwater/surface water exchange on stable water isotopic signatures along the Darling River, NSW, Australia / K. Meredith [and others] -- A geochemical approach to determining the hydrological regime of wetlands in a volcanic plain, south-eastern Australia / A.B. Barton [and others] -- Mapping surface water-groundwater interactions and associated geological faults using temperature profiling / M. Bonte [and others] -- Typology of groundwater surface water interaction (GSI typology) with new developments and case study supporting implementation 95 of the EU Water Framework and Groundwater Directives / M. Dahl & K. Hinsby -- Conservation of trial dewatering discharge through re-injection in the Pilbara region, Western Australia / L.R. Evans & J. Youngs -- Nitrogen cycle in gravel bed rivers: the effect of the hyporheic zone / A. Marzadri & A. Bellin -- Groundwater recharge quantification for the sustainability of ecosystems in plains of Argentina / M.P. D'Elia [and others] -- Nutrient sources for green macroalgae in the Ria Formosa lagoon: assessing the role of groundwater / T. Stigter [and others] -- Relationships between wetlands and the Doñana coastal aquifer (SW Spain) / M. Manzano [and others] -- Groundwater dependent ecosystems associated with basalt aquifers of the Alstonville Plateau, New South Wales, Australia / R.T. Green, R.S. Brodie & R.M. Williams -- A shift in the ecohydrological state of groundwater dependent vegetation due to climate change and groundwater drawdown on the Swan Coastal Plain of Western Australia / R. Froend, M. Davies & M. Martin -- Response of wetland vegetation to climate change and groundwater decline on the Swan Coastal Plain, Western Australia: implications for management / R. Loomes, R. Froend & B. Sommer -- Hydrogeochemical processes in the Pateira de Fermentelos lagoon (Portugal) and their impact on water quality / C. Sena & M.T. Condesso de Melo -- Relationship between dry and wet beach ecosystems and E. coli levels in groundwater below beaches of the Great Lakes, Canada / A.S. Crowe & J. Milne -- Surface water, groundwater and ecological interactions along the River Murray. A pilot study of management initiatives at the Bookpurnong Floodplain, South Australia / V. Berens [and others] -- Hydrodynamic interaction between gravity-driven and over-pressured groundwater flow and its consequences on soil and wetland salinisation / J. Mádl-Szo?nyi, S. Simon & J. Tóth -- Relationship between certain phreatophytic plants and regional groundwater circulation in hard rocks of the Spanish Central System / M. Martín-Loeches & J.G. Yélamos -- Surface/groundwater interactions: identifying spatial controls on water quality and quantity in a lowland UK Chalk catchment / N.J.K. Howden [and others] -- Modelling stream-groundwater interactions in the Querenðca-Silves Aquifer System / J.P. Monteiro [and others]. Groundwater resources are facing increasing pressure from consuming and contaminating activities. There is a growing awareness that the quantitative and qualitative preservation of groundwater resources is a global need, not only to safeguard their future use for public supply and irrigation, but also to protect those ecosystems that depend partially or entirely on groundwater to maintain their species composition and natural ecological processes. Known as groundwater dependent ecosystems (GDEs), they have been a fast-growing field of research during the last two decades. This book is intended to provide a diverse overview of important studies on groundwater and ecosystems, including a toolbox for assessing the ecological water requirements for GDEs, and relevant case studies on groundwater/surface-water interactions, as well as the role of nutrients in groundwater for GDEs and ecosystem dependence (vegetation and cave fauna) on groundwater. Case studies are from Australia (nine studies) and Europe (12 studies from nine countries) as well as Argentina, Canada and South Africa. This book is of interest to everybody dealing with groundwater and its relationship with ecosystems. It is highly relevant for researchers, managers and decision-makers in the field of water and environment. It provides up-to-date information on crucial factors and parameters that need to be considered when studying groundwater-ecosystem relationships in different environments worldwide.