Olaf Büttner
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View article: Lake–Groundwater Biogeochemical Interactions in a River‐Delimited System: The Groundwater and Lakes Urban Observatory (GLUO)
Lake–Groundwater Biogeochemical Interactions in a River‐Delimited System: The Groundwater and Lakes Urban Observatory (GLUO) Open
Preservation of urban aquatic ecosystems is of primary importance for human well‐being, biodiversity protection and the future of society. Lake–groundwater–river interactions within urban floodplains harbour intrinsic fragility, yet remain…
View article: Nutrient loading and stream order shape benthic and pelagic spring algal biomass in a large, temperate river basin (Elbe River)
Nutrient loading and stream order shape benthic and pelagic spring algal biomass in a large, temperate river basin (Elbe River) Open
Eutrophication persists in many freshwater systems despite extensive efforts to control nutrient emissions from point and diffuse sources. While intensely studied at local or regional scales, the joint response of benthic and pelagic algae…
View article: Seamless forward assessment of toxic risks in river networks for mixtures of chemicals originating from wastewater treatment plant effluents
Seamless forward assessment of toxic risks in river networks for mixtures of chemicals originating from wastewater treatment plant effluents Open
Chemicals in the aquatic environment can be harmful to biota and may cause toxic risks to the aquatic ecosystems. A high number of these chemicals originate from point sources (households, manufacturing and industries). A subset of the sub…
View article: How anthropogenic modification of riverscapes reduce the resilience of floodplain waters to drought
How anthropogenic modification of riverscapes reduce the resilience of floodplain waters to drought Open
Central Europe has experienced an extreme drought over the last five summers, which has led to a deficit in precipitation and discharge unlikely to be replenished quickly. Due to climate change, extreme weather events and accompanying drou…
View article: Microplastic transport in European river networks
Microplastic transport in European river networks Open
Microplastics (MP) enter the aquatic environment through both diffuse and point sources, and are transported through the river networks into the seas and oceans. MP threatens the aquatic ecosystems and are present in water, sediment and bi…
View article: Mapping chemical footprints of organic micropollutants in European streams
Mapping chemical footprints of organic micropollutants in European streams Open
There is increasing awareness that chemical pollution of freshwater systems with complex mixtures of chemicals from domestic sources, agriculture and industry may cause a substantial chemical footprint on water organisms, pushing aquatic e…
View article: QUADICA: water QUAlity, DIscharge and Catchment Attributes for large-sample studies in Germany
QUADICA: water QUAlity, DIscharge and Catchment Attributes for large-sample studies in Germany Open
Environmental data are the key to defining and addressing water quality and quantity challenges at the catchment scale. Here, we present the first large-sample water quality data set for 1386 German catchments covering a large range of hyd…
View article: An Analytical Framework for Determining the Ecological Risks of Wastewater Discharges in River Networks Under Climate Change
An Analytical Framework for Determining the Ecological Risks of Wastewater Discharges in River Networks Under Climate Change Open
Over the last decades, treatment of domestic wastewater promoted by environmental regulations have reduced human health risks and improved water quality. However, ecological risks caused by effluents of wastewater treatment plants (WWTPs) …
View article: Drivers of multi-decadal nitrate regime shifts in a large European catchment
Drivers of multi-decadal nitrate regime shifts in a large European catchment Open
Long-term monitoring shows evidence of persistent changes in the magnitude and timing of the seasonal pattern of nitrate concentrations in streams, with possibly grave effects on aquatic ecosystems. Seasonal patterns of stream nutrient con…
View article: Why wastewater treatment fails to protect stream ecosystems in Europe
Why wastewater treatment fails to protect stream ecosystems in Europe Open
There is significant debate about why less than half of European rivers and streams are in good ecological status, despite decades of intense regulatory efforts. Of the multiple stressors that are recognized as potential contributors to st…
View article: QUADICA: A large-sample data set of water quality, discharge and catchment attributes for Germany
QUADICA: A large-sample data set of water quality, discharge and catchment attributes for Germany Open
<p>Environmental data are critical for understanding and managing ecosystems, including mitigation of degraded water quality. Therefore, we provide the first large-sample water quality data set of riverine water quality combined with…
View article: Drivers of multi-decadal in-stream nitrate regime shifts in a large European catchment
Drivers of multi-decadal in-stream nitrate regime shifts in a large European catchment Open
<p>Long-term monitoring shows evidence of persistent changes in the magnitude and timing of the seasonal pattern and C-Q relations of nitrate concentrations in rivers, with possibly grave effects on aquatic ecosystems. Seasonal patte…
View article: Water quality, discharge and catchment attributes for large-sample studies in Germany – QUADICA
Water quality, discharge and catchment attributes for large-sample studies in Germany – QUADICA Open
Environmental data are the key to define and address water quality and quantity challenges at catchment scale. Here, we present the first large-sample water quality data set for 1386 German catchments covering a large range of hydroclimati…
View article: What Determines the Future Ecological Risks of Wastewater Discharges in River Networks: Load, Location or Climate Change?
What Determines the Future Ecological Risks of Wastewater Discharges in River Networks: Load, Location or Climate Change? Open
Over the last decades, treatment of domestic wastewater promoted by environmental regulations have reduced human health risks and improved water quality. However, ecological risks caused by effluents of wastewater treatment plants (WWTPs) …
View article: Iron Exports From Catchments Are Constrained by Redox Status and Topography
Iron Exports From Catchments Are Constrained by Redox Status and Topography Open
Fe(III) hydroxides stabilize organic carbon (OC) and P in soils. Observations of rising stream Fe concentrations are controversially posited to result from a flushing of iron‐rich deeper soil layers or a decrease of competing electron acce…
View article: Anthropogenic Transformation Disconnects a Lowland River From Contemporary Carbon Stores in Its Catchment
Anthropogenic Transformation Disconnects a Lowland River From Contemporary Carbon Stores in Its Catchment Open
Rivers transport carbon from continents to oceans. Surprisingly, this carbon has often been found to be centuries old, not originating from contemporary plant biomass. This can be explained by anthropogenic disturbance of soils or discharg…
View article: Risk Assessment of Climate Change Impacts on Urban Discharge Fraction and Eutrophication in Large European River Networks
Risk Assessment of Climate Change Impacts on Urban Discharge Fraction and Eutrophication in Large European River Networks Open
<p>Climate change impacts on natural environments and human-built landscapes have been extensively studied from the meteorological, hydrological, agricultural, and urban point of views. Embracing the inevitability of climate change, …
View article: Ecological status of river networks: stream order-dependent impacts of agricultural and urban pressures across ecoregions
Ecological status of river networks: stream order-dependent impacts of agricultural and urban pressures across ecoregions Open
Why have ecological targets for the majority of water bodies in Europe not been met despite decades of water protection programs? We hypothesize that restoration strategies have not adequately accounted for whole-river network perspectives…
View article: Microplastic particle emission from wastewater treatment plant effluents into river networks in Germany: Loads, spatial patterns of concentrations and potential toxicity
Microplastic particle emission from wastewater treatment plant effluents into river networks in Germany: Loads, spatial patterns of concentrations and potential toxicity Open
Wastewater treatment plants (WWTP) are considered to be a point source of microplastic (particles 0 and 4.5 ∗ 105 items/m3 with a median of around 6400 items/m3. The total, median microplastic load emitted by WWTPs in Germany is 7 ∗ 1012 i…
View article: Assessing the impact of climate change on water quality and quantity in the Elbe catchment using an open-data driven approach
Assessing the impact of climate change on water quality and quantity in the Elbe catchment using an open-data driven approach Open
<p>Due to global climate change, the past decade has been the warmest for Germany since the beginning of climate records. Not only air temperature but also precipitation patterns are changing and therefore influencing the hydrologic …
View article: Spatial patterns of water quality impairments from point source nutrient loads in Germany's largest national River Basin (Weser River)
Spatial patterns of water quality impairments from point source nutrient loads in Germany's largest national River Basin (Weser River) Open
We employed the well-established Horton-Strahler, hierarchical, stream-order (ω) scheme to investigate scaling of nutrient loads (P and N) from ~845 wastewater treatment plants (WWTPs) distributed along the river network in urbanized Weser…
View article: Spatial Organization of Human Population and Wastewater Treatment Plants in Urbanized River Basins
Spatial Organization of Human Population and Wastewater Treatment Plants in Urbanized River Basins Open
Discharge from multiple wastewater treatment plants (WWTPs) distributed in urbanized river basins contributes to impairments of river water‐quality and aquatic ecosystem integrity, with size and location of WWTPs determined by population d…
View article: Metadata describing the Kharaa Yeröö River Basin Water Quality Database
Metadata describing the Kharaa Yeröö River Basin Water Quality Database Open
n the framework of the BMBF funded project on Integrated Water Resources Management in Central Asia (Model region Mongolia, MOMO project, www.iwrm-momo.de) the objectives focused on supplementing, validating and extending the existing surv…
View article: Spatio-temporal controls of dissolved organic carbon stream water concentrations
Spatio-temporal controls of dissolved organic carbon stream water concentrations Open
Elevated concentration and high variance of dissolved organic carbon (DOC) in surface waters are a challenge for the production of drinking water. Past studies have indicated a dominant role of wetlands in DOC mobilization, but have mainly…
View article: Movement data of Siberian taimen (Hucho taimen Pallas 1773) in the Onon River and Balj tributary (Amur River basin, Mongolia, 2013-2014)
Movement data of Siberian taimen (Hucho taimen Pallas 1773) in the Onon River and Balj tributary (Amur River basin, Mongolia, 2013-2014) Open
Movement data of Siberian taimen (Hucho taimen Pallas 1773) in the Onon River and Balj tributary (Amur River basin, Mongolia, 2013-2014)
View article: Passive acoustic telemetry data for lenok (Brachymystax lenok Pallas 1773) in the Eroo River and some tributaries (Selenga River basin, Mongolia, 2011-2012)
Passive acoustic telemetry data for lenok (Brachymystax lenok Pallas 1773) in the Eroo River and some tributaries (Selenga River basin, Mongolia, 2011-2012) Open
The aim of this research was to describe and quantify the seasonal migration patterns and fine-scale movement profiles of Brachymystax lenok, a threatened, potadromous salmonid that inhabits the highly connected, boreal river basins of Sib…