Search Results - "Koop, Jochen H.E."

Freshwater insects of different feeding guilds ingest microplastics in two Gulf of Guinea tributaries in Nigeria by Akindele, Emmanuel O., Ehlers, Sonja M., Koop, Jochen H. E.

“…Plastic pollution has enormous impacts on freshwater and marine ecosystem health, and it is one of the topmost environmental concerns of the current geological…”
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PVC and PET microplastics in caddisfly (Lepidostoma basale) cases reduce case stability by Ehlers, Sonja M., Al Najjar, Tamara, Taupp, Thomas, Koop, Jochen H. E.

“…Caddisfly larvae occur in streams and rivers, and many caddisfly species build protective cases using material from their habitat such as sand grains. At the…”
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Physiological indicators of fitness in benthic invertebrates: a useful measure for ecological health assessment and experimental ecology by Koop, Jochen H. E., Winkelmann, Carola, Becker, Jochen, Hellmann, Claudia, Ortmann, Christian

“…Physiological indicators of fitness present a measure of an organism’s response to a changing environment. An analysis of how these organisms allocate and…”
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The ecological potential of geotextiles in hydraulic engineering by Wetzel, Markus A., Wiegmann, Melanie, Koop, Jochen H.E.

“…Geotextile materials find increasing use in coastal protection as an alternative material to natural stone, slag, and concrete. In this environment…”
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Characterization of three plastic forms: Plasticoncrete, plastimetal and plastisessiles by Ellrich, Julius A., Ehlers, Sonja M., Furukuma, Shunji, Pogoda, Bernadette, Koop, Jochen H.E.

“…Plastic forms, including plastiglomerate, pyroplastic, plasticrusts, anthropoquinas, plastistone and plastitar, were recorded worldwide. These plastic forms…”
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Microplastic load and polymer type composition in European rocky intertidal snails: Consistency across locations, wave exposure and years by Ehlers, Sonja M., Ellrich, Julius A., Koop, Jochen H.E.

“…Microplastics (<5 mm) are emerging pollutants in oceans worldwide. As such small particles are easily ingested, microplastics are found in numerous pelagic and…”
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Low‐cost microplastic visualization in feeding experiments using an ultraviolet light‐emitting flashlight by Ehlers, Sonja M., Maxein, Jan, Koop, Jochen H. E.

“…Microplastics are pollutants threatening the health of marine, freshwater and terrestrial organisms. To analyze whether an organism is able to ingest…”
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Microplastics of different characteristics are incorporated into the larval cases of the freshwater caddisfly Lepidostoma basale by Ehlers, SM, Manz, W, Koop, JHE

“…Plastic pollution is present in aquatic systems worldwide. While numerous studies have investigated microplastic interactions with marine organisms,…”
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Electrofishing distances for sampling fish assemblages in oxbow lakes of the River Rhine by Heimann, Wilko, Futterer, Daniel, Schulz, Holger K., Sahm, René, Koop, Jochen H. E., Schulz, Ralf

“…Assessment of fish assemblage structure depends on representative sampling. In contrast to lotic water bodies, recommendations for a general study design are…”
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Quantitative analysis of PET microplastics in environmental model samples using quantitative 1H-NMR spectroscopy: validation of an optimized and consistent sample clean-up method by Peez, Nadine, Becker, Jochen, Ehlers, Sonja M., Fritz, Melanie, Fischer, Christian B., Koop, Jochen H. E., Winkelmann, Carola, Imhof, Wolfgang

“…Identification and quantification of microplastics (MP) in environmental samples is crucial for understanding the risk and distribution of MP in the…”
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Metabolic activity and behavior of the invasive amphipod Dikerogammarus villosus and two common Central European gammarid species (Gammarus fossarum, Gammarus roeselii): Low metabolic rates may favor the invader by Becker, Jochen, Ortmann, Christian, Wetzel, Markus A., Koop, Jochen H.E.

“…The Ponto-Caspian amphipod Dikerogammarus villosus is one of the most successful invaders in Central European rivers. Contrary to studies on its ecology,…”
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The ecological quality status of the Elbe estuary. A comparative approach on different benthic biotic indices applied to a highly modified estuary by Wetzel, Markus A., von der Ohe, Peter C., Manz, Werner, Koop, Jochen H.E., Wahrendorf, Dierk-Steffen

“…Indices to assess the ecological status of water bodies according to the European Water Framework Directive (WFD) frequently produce widely differing results…”
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Mate guarding in relation to seasonal changes in the energy reserves of two freshwater amphipods (Gammarus fossarum and G. pulex) by BECKER, JOCHEN, ORTMANN, CHRISTIAN, WETZEL, MARKUS A., WINKELMANN, CAROLA, KOOP, JOCHEN H. E.

“…Summary 1. We assessed sex‐specific seasonal changes in major energy storage compounds (triglycerides, glycogen) in Gammarus fossarum and Gammarus pulex…”
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At which surface roughness do claws cling? Investigations with larvae of the running water mayfly Epeorus assimilis (Heptageniidae, Ephemeroptera) by Ditsche-Kuru, Petra, Barthlott, Wilhelm, Koop, Jochen H.E.

“…Tarsal claws, which are common attachment devices in arthropods, interlock with the surface irregularities of the substrata. Most insects have two tarsal…”
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First Evidence of Retrospective Findings of Microplastics in Harbour Porpoises (Phocoena phocoena) From German Waters by Philipp, Carolin, Unger, Bianca, Ehlers, Sonja M., Koop, Jochen H. E., Siebert, Ursula

“…Microplastic ingestion by lower trophic level organisms is well known, whereas information on microplastic ingestion, egestion and accumulation by top…”
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Towards environmental assessment of river ecosystems by analyzing energy reserves of aquatic invertebrates by Koop, Jochen H.E., Schäffer, Michael, Ortmann, Christian, Winkelmann, Carola

“…Environmental preferences of invertebrates in larger rivers are assumed to be displayed in their upstream–downstream distribution and in their abundance. Near…”
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Benthivorous fish reduce stream invertebrate drift in a large-scale field experiment by Winkelmann, Carola, Petzoldt, Thomas, Koop, Jochen H. E., Matthaei, Christoph D., Benndorf, Jürgen

“…Drift as a low-energy cost means of migration may enable stream invertebrates to leave risky habitats or to escape after encountering a predator. While the…”
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management of metabolic energy storage during the life cycle of mayflies: a comparative field investigation of the collector-gatherer Ephemera danica and the scraper Rhithrogena semicolorata by Winkelmann, Carola, Koop, Jochen H. E

“…The concentration and seasonal dynamics of the major energy storage components, triglycerides and glycogen, were measured in two species of mayfly (Rhithrogena…”
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New insights into a life in current: do the gill lamellae of Epeorus assimilis and Iron alpicola larvae (Ephemeroptera: Heptageniidae) function as a sucker or as friction pads? by Ditsche-Kuru, Petra, Koop, Jochen H.E.

“…Epeorus assimilis and Iron alpicola larvae inhabit swift running waters where they scrape algae from the stones. Previous authors suggested that the gill…”
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Finding appropriate reference sites in large-scale aquatic field experiments by Schmidt, Susanne I, König-Rinke, Marie, Kornek, Katja, Winkelmann, Carola, Wetzel, Markus A, Koop, Jochen H. E, Benndorf, Jürgen

“…Defining the reference condition is one of the most critical aspects of ecosystem investigations since it describes the baseline against which the experimental…”
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