- Department:(Dept. 1) Ecohydrology and Biogeochemistry
Using soil water isotopes to infer the influence of contrasting urban green space on ecohydrological partitioning
The authors studied water partitioning in different urban green spaces using stable isotopes. During the warm and dry 2019, evapotranspiration losses of grass and trees were higher than those of potentially more drought-resilient shrub. The study contributes to a better understanding of urban ecohydrological partitioning, which will be essential to sustainably meet water demands of urban green.
Species-specific macroinvertebrate responses to climate and land use scenarios in a Mediterranean catchment revealed by an integrated modelling approach
The authors applied an integrated modelling approach to address the complex species-specific macroinvertebrate responses to climate and land-use changes. The results indicate the non-linear response of species within the commonly used Ephemeroptera, Plecoptera and Trichoptera taxa to altered streamflow conditions and highlight the need to include the species level responses in such studies.
Lunar illuminated fraction is a poor proxy for moonlight exposure
The authors suggest that lunar illuminated fraction should, in general, never be used in biological studies, as alternative variables such as horizontal illuminance better represent moonlight exposure, and therefore offer a greater chance of detecting the effects of moonlight. They provide a brief explanation of how moonlight varies with season and time of night.
Advective lateral transport of streamwise momentum governs mixing at small river confluences
Mixing within confluences is highly variable.This study relates patterns and amounts of mixing to three‐dimensional flow structure at three small confluences. The study indicates that generalization of mixing at confluences remains challenging but that advective lateral fluxes of streamwise momentum related to secondary currents or primary flow greatly enhance mixing at confluences.
Density effects at a concordant bed natural river confluence
Confluences are locations of complex hydrodynamic conditions within river systems. The effects on hydrodynamics and mixing of temperature‐induced density differences between incoming flows were investigated at a small‐size concordant bed confluence.
Geochemical signatures of lignite mining products in sediments downstream a fluvial-lacustrine system
The authors have investigated whether and to what extent mining products from the Lusatian mining are deposited in the sediments of the River Spree: their signature in the river bed reaches 90 kilometres.
Sulphate in freshwater ecosystems: a review of sources, biogeochemical cycles, ecotoxicological effects and bioremediation
Sulphate pollution of inland waters is a persistent global problem. Climate change, land use and acid mining drainage are among the main causes. The review shows that sulphate affects the biogeochemical turnover of carbon, nitrogen and phosphorus and can have toxic effects on aquatic organisms. Bioremediation in buffer zones is a possible mitigation tool.
Geochemical focusing and sequestration of manganese during eutrophication of Lake Stechlin (NE Germany)
Eutrophication of Lake Stechlin leads to changes in the sediment by an intensification of internal matter cycles. The reductive dissolution of Mn in shallow areas and the precipitation result in the fixation of Mn as rhodochrosite in the sediment below 56 m depth. Geochemical Mn focusing indicates oxygen-free conditions in deep water and can be used to reconstruct former environmental conditions.
Peak grain forecasts for the US High Plains amid withering waters
A predator-prey model shows the coupled dynamics of groundwater use and crop production. It provides the scientific basis for the sustainability analysis of the irrigation of agricultural land with groundwater.
Homogenization of the terrestrial water cycle
Plant uniformity in highly managed agricultural landscapes has led to increases in flood and drought frequencies and magnitudes, as well as a poorer water quality. The study explores the risk of the homogenization of the terrestrial water cycle.