Susanne I Schmidt

Susanne I Schmidt
Helmholtz-Zentrum für Umweltforschung | UFZ · Department of Lake Research

PhD

About

65
Publications
53,181
Reads
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1,178
Citations
Introduction
Being a hydrobiologist by training, I am very interested in all ecological phenomena, specifically involving groundwater and surface water. I enjoy the interdisciplinary approach and have over the years gotten into ecosystem modelling, via statistical modelling, both of which have become my priority. Currently I explore the use of satellite data for characterizing surface water quality.
Additional affiliations
November 2021 - present
Helmholtz-Zentrum für Umweltforschung
Position
  • Senior Researcher
July 2018 - November 2021
Institute of Hydrobiology CAS
Position
  • Researcher
September 2015 - June 2018
Universität Koblenz-Landau
Position
  • Researcher
Description
  • project "AufLand" - Impacts of water on Land. Teaching: 1) Basic methods in Microscropy 2) Field methods in Limnology

Publications

Publications (65)
Article
In an alluvial aquifer in the River Fulda Valley (Germany) the influence of agricultural inputs on the subterranean physical, chemical and biological relationships was examined. A 40-year-old (1977-1981) comprehensive data set on the groundwater microbiome plus metazoa was now analysed for the first time in full (measurements for up to 4 years: hyd...
Article
Full-text available
Forest disturbances influence water quantities and qualities in catchments, but these disturbances cannot be easily measured and quantified directly. The two main options are direct tree counting and the use of satellite images, from which forest disturbance indices are calculated. The problem with the first option is that it is time consuming. To...
Article
Forest damage by insect infestation directly affects the trees themselves, but also indirectly affects water quality via soil processes. The changes in water composition may undergo different pathways depending on site-specific characteristics and forest components, especially the proportion of coniferous and deciduous trees. Here, we test whether...
Article
Full-text available
Subterranean ecosystems are among the most widespread environments on Earth, yet we still have poor knowledge of their biodiversity. To raise awareness of subterranean ecosystems, the essential services they provide, and their unique conservation challenges, 2021 and 2022 were designated International Years of Caves and Karst. As these ecosystems h...
Article
Groundwater comprises the largest freshwater ecosystem on the planet. It has a distinct regime of extreme, yet stable environmental conditions that have favoured the development of similar morphological and functional traits in the resident invertebrate fauna (stygofauna). The analysis of community traits is increasingly used as an alternative to t...
Article
Waterbodies worldwide undergo changes and this influences the ecosystems with the resident communities. Groundwater is no exception. However, few studies have so far focused on how the combined effects from catchment management and a changing climate impact the communities living in the groundwater. In 2019-2021 in southwestern Czech Republic, we s...
Article
Full-text available
The largest freshwater ecosystem on earth is in the subsurface: the groundwater. It is populated by animals of almost all phyla and by bacteria, archaea, and fungi. Processes on the macro-, meso-, and micro-scale shape this ecosystem. Bioremediation, i.e., the degradation of contaminants, is steered on the scale of micrometers. However, processes t...
Poster
Full-text available
Snow deposition in the forest and consequent runoff during the snowmelt period are highly affected by the forest stand of the given catchment. Disturbed forest can accumulate more snow due to lower leaf area index, but the snow also melts faster due higher income of solar radiation. Between 2004 and 2008, part of Šumava Mts. (Black forest) range (C...
Article
Full-text available
• Caves and other subterranean habitats fulfill the requirements of experimental model systems to address general questions in ecology and evolution. Yet, the harsh working conditions of these environments and the uniqueness of the subterranean organisms have challenged most attempts to pursuit standardized research. • Two main obstacles have syner...
Article
Using isotopic and hydrochemical tools, we focused our study on water and element fluxes with snowmelt in two headwater catchments with different forest stands. One catchment is with mature, and the other catchment is with forest regenerating after a tree dieback. Sampling and analysis of the surface water and precipitation throughout one hydrologi...
Article
Groundwater organisms have so far only been studied sporadically in Bohemia. Groundwater fauna feeds on microbes which provide the ecosystem service of cleaning the groundwater from organics. Grazing by fauna may increase such degradation. This ecosystem service is the basis for drinking water production. However, there is lack of knowledge on how...
Chapter
Aim: Micro-scale processes play a fundamental role in shaping groundwater ecosystems and yet they remain poorly understood and under-explained. Here, we aim to provide an overview of existing concepts, methods, and knowledge. We outline how increased understanding of micro-scale processes may lead to an improved appreciation of the range of ecosyst...
Preprint
Full-text available
(1) Caves and other subterranean habitats fulfill the requirements of experimental model systems to address general questions in ecology and evolution. Yet, the harsh working conditions of these environments and the uniqueness of the subterranean organisms have challenged most attempts to pursuit standardized research (2) Two main obstacles have sy...
Article
Full-text available
Chironomids have been proposed as important indicators for monitoring freshwater ecosystems, however, morphological determination is very challenging. In this study, we investigated the effectiveness of metabarcoding for chironomid diversity assessment and tested the retrieved chironomid operational taxonomic units (OTUs) for possible changes in re...
Article
Understanding water flow paths and chemical inputs from the catchment to downstream water bodies is essential for determining sensitivity and response of water resources to climatic, land use and environmental changes. Multivariate analysis of hydrochemical data and estimation of water balance using chloride as a chemical tracer, and oxygen and hyd...
Preprint
Full-text available
Understanding water flow paths and chemical inputs from the catchment to downstream water bodies is essential for determining sensitivity and response of water resources to climatic, land use and environmental changes. Multivariate analysis of hydrochemical data and estimation of water balance using chloride as a chemical tracer, and oxygen and hyd...
Article
BACKGROUND: The research focused on the evaluation of the impact of cover cropping on trace metals (Fe, Mn, Cu, Zn, Pb, Co and Cd) and nutrients in vineyard soils and Vitis vinifera L. For this purpose, two types of cover crops (Lolium perenne L. and Medicago sativa L.) and their mixture were planted between vine rows of Muscat white in the vineyar...
Article
Free temporary link: https://authors.elsevier.com/a/1ZF299pi-M4sl In this study, sources of recharge and contamination in urban groundwater and in groundwater underneath a forest in the same aquifer were determined and compared. Data on hydro-chemical parameters and stable isotopes of water were collected in urban and forest springs in the Kharkiv...
Article
As a consequence of the growing global dependence on groundwater resources, environmental risk assessments (ERA) for groundwater are increasingly required and, with that, ecotoxicological studies with groundwater fauna (stygofauna). However, the literature on the ecotoxicological studies with stygobiotic species (i.e. species that complete their li...
Technical Report
Full-text available
Report of the University of Koblenz-Landau on the results of the interdisciplinary project "AufLand", on impacts of running and standing water on the surrounding land. Editor: The President of the University of Koblenz-Landau. Topic editors: Susanne I. Schmidt, Carola Winkelmann, Claudia Eberhard-Metzger, Berend Barkela. The work was supported by t...
Article
Aim -- Recent studies increasingly use statistical methods to infer biotic interactions from cooccurrence information at large spatial scale. However, disentangling biotic interactions from other factors that can affect co-occurrence patterns at the macro scale is a major challenge. -- Approach -- We present a set of questions that analysts and re...
Article
Full-text available
The biocide Bacillus thuringiensis var. israelensis (Bti) is widely applied for mosquito control in temporary wetlands of the German Upper Rhine Valley. Even though Bti is considered environmentally friendly, several studies have shown non-target effects on chironomids, a key food resource in wetland ecosystems. Chironomids have been proposed as im...
Article
Microbial communities are the driving force behind the degradation of contaminants like aromatic hydrocarbons in groundwater ecosystems. However, little is known about the response of native microbial communities to contamination in pristine environments as well as their potential to recover from a contamination event. Here, we used an indoor aquif...
Article
Full-text available
The acidification of the oceans could potentially alter marine plankton communities with consequences for ecosystem functioning. While several studies have investigated effects of ocean acidification on communities using traditional methods, few have used genetic analyses. Here, we use community barcoding to assess the impact of ocean acidification...
Data
Final OTU table based on the 18S gene region containing the HTS reads. Columns A—E contain information about the sampling day, sampling method, sampled mesocosms and CO2 treatment. Columns F—P contain information about environmental variables. Columns Q—ACB contain OTU information. This data was used for adonis, PCA (Fig 3), nMDS (Fig 2) and RDA (F...
Data
Final OTU table based on the cox1 gene region containing the HTS reads. Columns A—E contain information about the sampling day, sampling method, sampled mesocosms and CO2 treatment. Columns F—AN contain OTU information. This data was used for adonis analysis. (TXT)
Data
Steps of the bioinformatics pipeline. Including the programs used, decreasing sequence reads, and OTU numbers. (PDF)
Article
Micro scale processes are expected to have a fundamental role in shaping groundwater ecosystems and yet they remain poorly understood and under-researched. In part, this is due to the fact that sampling is rarely carried out at the scale at which microorganisms, and their grazers and predators, function and thus we lack essential information. While...
Chapter
Full-text available
1. Das Lückensystem der Sohlsedimente und Uferbereiche von Fließgewässern wird als das hyporheische Interstitial bezeichnet. Es steht in einem hydrologischen und stofflichen Austausch zum Oberflächenwasser und häufig auch zum anliegenden Grundwasser. Es ist die Übergangszone zwischen Fließgewässern und Grundwasser, die den Austausch zwischen beiden...
Chapter
1. Das Lückensystem der Sohlsedimente und Uferbereiche von Fließgewässern wird als das hyporheische Interstitial bezeichnet. Es steht in einem hydrologischen und stofflichen Austausch zum Oberflächenwasser und häufig auch zum anliegenden Grundwasser. Es ist die Übergangszone zwischen Fließgewässern und Grundwasser, die den Austausch zwischen beiden...
Article
Biodegradation is one of the most favored and sustainable means of removing organic pollutants from contaminated aquifers but the major steering factors are still surprisingly poorly understood. Growing evidence questions some of the established concepts for control of biodegradation. Here, we critically discuss classical concepts such as the therm...
Article
Full-text available
Distribution of groundwater invertebrate communities in porous aquifers (and their habitats) varies on spatial scales and many attempts have been made to classify these on various scales. The new data-based approach, presented here, classifies the complex distribution of groundwater habitats on a local scale (i.e. along transects of < 100 m) and me...
Article
Temperature stress in invertebrates is known to be reflected by changes in catecholamine levels. However, the mechanisms of stress response are not fully understood. Groundwater and surface water amphipods are expected to be differently adapted to temperature elevations due to the different temperature regimes in their habitats and consequently, sh...
Article
Grundwasser ist die wichtigste Quelle für Trinkwasser, vor allem aber es ist auch ein bedeutender Lebensraum. In ihrer Struktur und Funktion intakte Grundwassergemeinschaften reinigen durch ihre Aktivität das unterirdische Wasser: Nur gesunde Grundwasserökosysteme liefern auch sauberes Trinkwasser. Da- her sind der Schutz und – als dessen Grundlage...
Article
A protocol was developed for testing the ecotoxicological effects of volatile organic compounds (VOCs) on groundwater invertebrates. Test substance volatility was addressed in a "closed from start to analysis"-design. Since manifestation of toxic effects may be delayed in 'slower metabolizing' organisms such as groundwater fauna, a time-independent...
Article
1. We conducted a paired large-scale predation experiment over 32 months in two streams being seasonally shaded by deciduous riparian trees, using the benthivorous fish species gudgeon (Gobio gobio) and stone loach (Barbatula barbatula) as top predators. The biomass of benthic grazers and periphyton in the presence/absence of fish was measured and...
Article
Many subsurface waters are considered groundwater but are influenced in shallow depths by hyporheic, parafluvial and/or soil interception water to such a degree that groundwater fauna (stygofauna) communities may be significantly altered. Recharge, even if spatially and temporally distinct, delivers input of dissolved oxygen, organic matter (OM), a...
Article
Sampling efficiency is directly linked to (faunistic) stability issues of any sampled site. It is more probable to sample a high proportion of the species occurring at a certain site, if communities remain constant in species composition with time. For this study 64 groundwater monitoring wells in Southwestern Germany were sampled six times to dete...
Conference Paper
Full-text available
We have developed a numerical model to study the impact of single cell processes and micro-scale heterogeneities on biodegradation in contaminated aquifers on the pore level (pore of 1 mm length). The model is able to consider the spatial distribution of solutes along the length and width of the pore and of individual microbial cells and cell clust...
Conference Paper
Full-text available
Groundwater is like dark matter - we know very little apart from the fact that it is hugely important. Given the scarcity of data, mathematical modelling can come to the rescue but existing groundwater models are mainly restricted to simulate the transport and degradation of contaminants on the scale of whole contaminated field sites by averaging o...
Conference Paper
Full-text available
Suitable use of water resources requires a fundamental understanding of filter, buffer and storage functions of soil/water systems. Heterogeneous systems, which include different flow paths (e.g. karst and fissured aquifers and/or multilayered porous media) are of special importance. The aim of this investigation was to assess the heterogeneity of...
Article
Suitable use of water resources requires a fundamental under- standing of filter, buffer and storage functions of soil/water systems. Heterogeneous systems, which include different flow paths (e.g. karst and fissured aquifers and/or multilayered porous media) are of special importance. The aim of this investigation was to assess the heterogeneity o...
Article
Full-text available
Services Provided By Groundwater Ecosystems Our daily lives depend on the provision of services by different ecosystems. An important contribution is made by our ground- water ecosystems. They make sure that groundwater is purified until it reaches drinking water quality; they ensure an active storage of clean water of constant quality, the biologi...
Article
Environmental policy and in particular the European water legislation, in the framework of the EU Groundwater Directive, has started to consider groundwater not only as a resource but as a living ecosystem. A precondition for comprehensive groundwater protection is thus the assessment of the biological and ecological state. The assessment of ecosys...
Article
Today, the use of geothermal energy is strongly promoted as an alternative and sustainable source of energy. However, regarding the authorization, regulation and monitoring of such facilities with respect to possible environmental impacts, a severe lack of knowledge has been identified. Aquifers are not only abiotic reservoirs of water and sediment...
Article
The use of ecological criteria for the assessment of aquatic ecosystem status is routine for surface waters. So far no ecological parameters are considered for the assessment and monitoring of groundwater quality. It has been well known for decades that aquifers are ecosystems harbouring a vast diversity of invertebrates and microorganisms. The gro...
Article
The use of groundwater as a carrier of thermal energy is an important source of sustainable heating and cooling. However, the effects of thermal use on geochemical and biological aquifer characteristics are poorly understood. Here, we have assessed the impacts of heat discharge on an uncontaminated, shallow aquifer by monitoring the hydrogeochemica...
Article
Full-text available
Defining the reference condition is one of the most critical aspects of ecosystem investigations since it describes the baseline against which the experimental sites will be evaluated and compared. In large-scale ecosystem experiments, this reference is ideally another ecosystem which is similar to the experimental system. We investigated two strea...
Article
Full-text available
To avoid depth erosion in rivers and to maintain the safety and ease of navigation, sediment-management measures have to be taken in Federal waterways (dredging, artificial supply and translocation of sediment). Here, we pose the question whether sediment management has any influence on the fauna of the riverbed. To answer this question, the macroz...
Article
Full-text available
The exchange of water with groundwater is a key determinant of water quality and faunal assemblage. Water exchange not only occurs with running waters, but also through percolation, interception (soil, porous alluvium), and evaporation. The aim of this study was to identify how different types of exchange were related to the groundwater faunal asse...
Article
Gradients in the sediment fauna comprising groundwater (GW) and hyporheic taxa were investigated in the sand/silt-bottomed Marbling Brook in Western Australia. The structure of sediment invertebrate assemblages from Marbling Brook sediments and the adjacent GW were studied at five sites over 1 year and hydrological interactions were characterized u...
Article
Groundwater bores act as traps. Net samplers are regularly used for sampling this type of trap for fauna. To enable direct comparisons of faunal communities in groundwater bores and stream sediments, stream sediment tubes were built similar to groundwater bores and were sampled with net samplers for fauna. These stream sediment tubes consisted of a...

Questions

Question (1)

Projects

Projects (4)
Project
Earth observation satellites of the European Copernicus programme constantly provide information about the status of lakes and reservoirs at far higher spatial and temporal resolution than classical monitoring. This freely available information from space is nevertheless almost unexploited by governments, state environmental agencies or water managers. In the frame of the joint research project "Monitoring water quality and water surface expansion of inland waters by remote sensing" (BIGFE) under the leadership of the Helmholtz Centre for Environmental Research (UFZ), workflows will be developed by comparing in situ monitoring data with remote sensing data for 100 lakes. The workflows will be designed so that they enable state agencies to use remote sensing data in standard water monitoring in a harmonized setting. The application-oriented project BIGFE is funded by the Federal Ministry of Transport and Digital Infrastructure as part of the Copernicus initiative.
Archived project
The project aims at unravelling mechanisms of different aspects of terrestrial-aquatic interactions. While land-water interactions receive a lot of attention, i.e. how landscapes influence water bodies, this project focuses on how the water bodies shape landscapes, particularly under management. The project is funded by the Ministerium für Wissenschaft, Weiterbildung und Kultur Rheinland-Pfalz, Germany, in the frame of the programme "Research initiative". Subprojects are: Water meadows - extensive agricultural techniques shape solute transport and biodiversity in the surface and subsurface Moscofee - fighting mosquito plagues with Bti might have side-effects Aquater - in-stream production feeds terrestrial food webs Eutrophication - in-stream nutrient budgets influence emergence and consequently terrestrial food webs Soil Genetics - Barcoding reveals patterns biodiversity patterns in soils under different water management https://www.uni-koblenz-landau.de/de/landau/fb7/umweltwissenschaften/forschung/aufland