Stefan Koch

ORCID: 0000-0002-8426-1472
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About
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Research Areas
  • Soil and Water Nutrient Dynamics
  • Peatlands and Wetlands Ecology
  • Soil Carbon and Nitrogen Dynamics
  • Phosphorus and nutrient management
  • Hydrology and Watershed Management Studies
  • Freshwater macroinvertebrate diversity and ecology
  • Coastal wetland ecosystem dynamics
  • Environmental DNA in Biodiversity Studies
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Soil erosion and sediment transport
  • Bioenergy crop production and management
  • Aeolian processes and effects
  • Mine drainage and remediation techniques
  • Groundwater flow and contamination studies
  • Fossil Insects in Amber
  • Fecal contamination and water quality
  • Coleoptera Taxonomy and Distribution
  • Identification and Quantification in Food
  • Legume Nitrogen Fixing Symbiosis
  • Wastewater Treatment and Nitrogen Removal
  • Integrated Water Resources Management
  • Plant nutrient uptake and metabolism
  • Aquatic Invertebrate Ecology and Behavior
  • Fire effects on ecosystems
  • Atmospheric and Environmental Gas Dynamics

University of Rostock
2012-2024

Mayflies, stoneflies and caddisflies (Ephemeroptera, Plecoptera Trichoptera) are prominent representatives of aquatic macroinvertebrates, commonly used as indicator organisms for water quality ecosystem assessments. However, unambiguous morphological identification EPT species, especially their immature life stages, is a challenging, yet fundamental task. A comprehensive DNA barcode library based upon taxonomically well-curated specimens needed to overcome the problematic identification....

10.1111/1755-0998.12683 article EN Molecular Ecology Resources 2017-04-27

Subsurface losses of colloidal and truly dissolved phosphorus (P) from arable land can cause ecological damage to surface water. To gain deeper knowledge about subsurface particulate P transport inland sources brooks, we studied an artificially drained lowland catchment (1550 ha) in north-eastern Germany. We took daily samples during the winter discharge period 2019/2020 at different locations, i.e., a drain outlet, ditch, brook, analyzed them for total (TPunfiltered), >750 nm (TP>750 nm),...

10.1016/j.scitotenv.2023.161439 article EN cc-by-nc The Science of The Total Environment 2023-01-06

Abstract Essential soil functions such as plant productivity, C storage, nutrient cycling and the storage purification of water all depend on biological processes. Given this insight, it is remarkable that in modeling these functions, various actors usually do not play an explicit role. In review perspective paper we analyze state art how processes could more adequately be accounted for. We for six different biologically driven clusters are key understanding namely i) turnover organic...

10.1007/s00374-024-01802-3 article EN cc-by Biology and Fertility of Soils 2024-03-11

Dragonflies and damselflies (Odonata) are important components in biomonitoring due to their amphibiotic lifecycle specific habitat requirements. They charismatic popular insects, but can be challenging identify despite large size often distinct coloration, especially the immature stages. DNA-based assessment tools rely on validated DNA barcode reference libraries evaluated a supraregional context minimize taxonomic incongruence identification mismatches.This study reports findings from...

10.7717/peerj.11192 article EN cc-by PeerJ 2021-05-03

Here, we investigated the effects of biogas digestate application on flow pathways and soil properties in a sandy aiming at unraveling phosphorus accumulation depletion processes fertilized soils. Dye tracer experiments were conducted to visualize distinguish between various pathways, while X-ray tomography was utilized characterize structure. The dye revealed differences control digestate-treated group profiles top-soils although no statistical verification possible amid single plot per...

10.1016/j.still.2024.106074 article EN cc-by Soil and Tillage Research 2024-04-03

Abstract For 31 species of mayflies, new records on their distribution are presented. Most them to the Middle East or northern Levant (Turkey, Syria, Lebanon). The fauna is composed for most part widespread in Europe (63%), a relatively high number (26%) endemic species, and few Caucasian (8%) South European (3%) species. Using genus Prosopistoma as an example, it shown that mayfly Levantine has been isolated from faunas Africa Asia very long period.

10.1080/09397140.1988.10637565 article EN Zoology in the Middle East 1988-01-01

The Warnow River Basin, an agriculturally dominated lowland watershed in North-Eastern Germany with a considerable extent of artificial drainage. We analyzed 21-year data set (1990–2010) dissolved reactive (DRP) and total phosphorus (TP) concentrations surface waters to evaluate trends seasonality (P) pathways P losses from soils. Phosphorus were moderately spatially variable over the investigation period mean DRP TP ranged 57 132 mg l−1 114 184 μg respectively. annual loads 0.04 ± 0.01 0.15...

10.1016/j.ejrh.2018.02.001 article EN cc-by Journal of Hydrology Regional Studies 2018-02-01

In soils, colloidal transport has been identified as the most important pathway for strong adsorbing, environmental contaminants like pesticides, heavy metals, and phosphorus. We conducted a comparative dye tracer experiment using Brilliant Blue (BB) solution Titanium(IV) oxide (TiO) colloid suspension (average particle size 0.3 μm), aiming to visualize quantify pathways in soils. Both tracers showed comparable general flow patterns with preferred over deepest part of soil profile,...

10.2134/jeq2016.04.0131 article EN cc-by-nc-nd Journal of Environmental Quality 2016-09-29

Core Ideas Severe rainfall events cause increased phosphorus release from soils. The proportion of DRP increases with increasing duration. Digestate application causes a 400‐fold increase in pore water P concentrations. fraction is clearly dominant immediately after fertilization. facilitates flux regime shift preferential flow pathways. fertilizers to soils may impair the quality both surface and subsurface waters. that follow fertilizer can In this study, suction plates were installed...

10.2136/vzj2019.03.0031 article EN cc-by-nc-nd Vadose Zone Journal 2019-01-01

Heterogeneous flow pathways through the soil determine transport of dissolved and particle-bound nutritional elements like phosphorus (P) to ground surface waters. This study was designed understand spatial patterns P in agriculturally used soils mechanisms causing accumulation depletion at centimetre scale. We conducted dye tracer experiments using Brilliant Blue on a loamy Stagnosol North-Eastern-Germany. The plant-available analysed double lactate extraction (DL-P). content topsoil...

10.1007/s10661-023-11465-6 article EN cc-by Environmental Monitoring and Assessment 2023-07-12

Riverbed sediments in agricultural landscapes are loaded with phosphorus (P). They may act as a source or sink for riverine P, possibly causing harmful algae blooms and eutrophication streams receiving water bodies, including coastal waters. In this study, we aimed at identifying the labile, moderately stable P fraction (Hedley fractionation) of northeastern German river basin (3000 km2). A non-metrical multidimensional scaling (NMDS) was used to identify most significant environmental...

10.3390/environments10030043 article EN Environments 2023-02-27

<p>Heterogenous flow pathways through the soil are a major component in transport of water, dissolved and particle-bound nutrients like phosphorus (P) to water resources, promote eutrophication bodies. Non-uniform patterns may also influence spatial variability P-content soils.</p><p>This study was designed understand distribution P agriculturally used soils mechanism causing accumulation depletion at centimeter scale. We conducted three replicate...

10.5194/egusphere-egu2020-18732 article EN 2020-03-10
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