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  1. Article ; Online: Pollutant source or sink? Adsorption and mobilization of PFOS and PFOA from sediments in a large shallow lake with extended reed belt.

    Reif, D / Zoboli, O / Wolfram, G / Amann, A / Saracevic, E / Riedler, P / Hainz, R / Hintermaier, S / Krampe, J / Zessner, M

    Journal of environmental management

    2022  Volume 320, Page(s) 115871

    Abstract: In this study, we i) assessed the occurrence of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in sediments, pore water, and bulk water from three different areas in Lake Neusiedl, Austria, and ii) investigated mechanisms regulating ... ...

    Abstract In this study, we i) assessed the occurrence of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in sediments, pore water, and bulk water from three different areas in Lake Neusiedl, Austria, and ii) investigated mechanisms regulating adsorption and remobilization of these substances under different conditions via multiple lab-scale experiments. The adsorption capacity was mainly influenced by sediments' organic matter content, oxide composition, and pre-loading. Results suggest that a further increase of PFAS-concentrations in the open lake can be partly buffered by sediment transport to the littoral zone and adsorption to sediments in the extended reed belt. But, under current conditions, the conducted experiments revealed a real risk for mobilization of PFOS and PFOA from reed belt sediments that may lead to their transport back into the lake. The amount of desorbed PFAS is primarily dependent on water/sediment- or pore water/water-ratios and the concentration gradient. In contrast, water matrix characteristics and oxygen levels played a minor role in partitioning. The highest risk for remobilizing PFOS and PFOA was observed in experiments with sediments taken near the only major tributary to the lake (river Wulka), which had the highest pre-loading. The following management advice for water transport between high and low polluted areas can be derived based on the results. First, to reduce emissions into Lake waters from polluted tributaries like the Wulka river, we recommend diffuse pathways through the reed belt in the lake's littoral to reduce pollutant transport into the Lake and avoid high local sediment loadings. Second, water exchange with dried-up areas with probable higher loadings should be carefully handled and monitored to avoid critical back transport in the open lake. And third, general work in the reed belt or generally in the reed should be accompanied by monitoring to prevent uncontrolled remobilization in the future.
    MeSH term(s) Adsorption ; Alkanesulfonic Acids ; Caprylates ; Environmental Monitoring/methods ; Environmental Pollutants ; Fluorocarbons/analysis ; Geologic Sediments ; Lakes ; Water ; Water Pollutants, Chemical/analysis
    Chemical Substances Alkanesulfonic Acids ; Caprylates ; Environmental Pollutants ; Fluorocarbons ; Water Pollutants, Chemical ; Water (059QF0KO0R) ; perfluorooctanoic acid (947VD76D3L) ; perfluorooctane sulfonic acid (9H2MAI21CL)
    Language English
    Publishing date 2022-08-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2022.115871
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Fate of nutrients and trace contaminants in a large shallow soda lake. Spatial gradients and underlying processes from the tributary river to the reed belt.

    Zoboli, Ottavia / Hainz, Roland / Riedler, Patricia / Kum, Georg / Sigmund, Elisabeth / Hintermaier, Silvia / Saracevic, Ernis / Krampe, Jörg / Zessner, Matthias / Wolfram, Georg

    Environmental science. Processes & impacts

    2023  Volume 25, Issue 9, Page(s) 1505–1518

    Abstract: Shallow lakes provide a multitude of ecosystem functions, but they are particularly vulnerable to natural and anthropogenic disturbances. Understanding the driving factors determining the fate and spatial distribution of nutrients and pollutants in such ... ...

    Abstract Shallow lakes provide a multitude of ecosystem functions, but they are particularly vulnerable to natural and anthropogenic disturbances. Understanding the driving factors determining the fate and spatial distribution of nutrients and pollutants in such systems is fundamental to assess the impact of ongoing or future external pressures endangering their ecological integrity. This study investigates the fate of trace contaminants transported into the large shallow Lake Neusiedl, including contaminants representative of different patterns of sources and emission pathways and of environmental behavior, namely metals, pharmaceuticals, an artificial sweetener and perfluoroalkyl substances. Further, it examines the horizontal spatial distribution of nutrients, ions and physico-chemical parameters with an unprecedented detailed focus on the internal variability within the large reed belt. As described in the past
    MeSH term(s) Lakes/chemistry ; Rivers ; Ecosystem ; Water Pollutants, Chemical/analysis ; Nutrients ; Water ; Environmental Monitoring ; China
    Chemical Substances Water Pollutants, Chemical ; Water (059QF0KO0R)
    Language English
    Publishing date 2023-09-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 2703814-2
    ISSN 2050-7895 ; 2050-7887
    ISSN (online) 2050-7895
    ISSN 2050-7887
    DOI 10.1039/d3em00152k
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Pollutant source or sink? Adsorption and mobilization of PFOS and PFOA from sediments in a large shallow lake with extended reed belt

    Reif, D. / Zoboli, O. / Wolfram, G. / Amann, A. / Saracevic, E. / Riedler, P. / Hainz, R. / Hintermaier, S. / Krampe, J. / Zessner, M.

    Journal of environmental management. 2022 Oct. 15, v. 320

    2022  

    Abstract: In this study, we i) assessed the occurrence of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in sediments, pore water, and bulk water from three different areas in Lake Neusiedl, Austria, and ii) investigated mechanisms regulating ... ...

    Abstract In this study, we i) assessed the occurrence of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in sediments, pore water, and bulk water from three different areas in Lake Neusiedl, Austria, and ii) investigated mechanisms regulating adsorption and remobilization of these substances under different conditions via multiple lab-scale experiments. The adsorption capacity was mainly influenced by sediments' organic matter content, oxide composition, and pre-loading. Results suggest that a further increase of PFAS-concentrations in the open lake can be partly buffered by sediment transport to the littoral zone and adsorption to sediments in the extended reed belt. But, under current conditions, the conducted experiments revealed a real risk for mobilization of PFOS and PFOA from reed belt sediments that may lead to their transport back into the lake. The amount of desorbed PFAS is primarily dependent on water/sediment- or pore water/water-ratios and the concentration gradient. In contrast, water matrix characteristics and oxygen levels played a minor role in partitioning. The highest risk for remobilizing PFOS and PFOA was observed in experiments with sediments taken near the only major tributary to the lake (river Wulka), which had the highest pre-loading. The following management advice for water transport between high and low polluted areas can be derived based on the results. First, to reduce emissions into Lake waters from polluted tributaries like the Wulka river, we recommend diffuse pathways through the reed belt in the lake's littoral to reduce pollutant transport into the Lake and avoid high local sediment loadings. Second, water exchange with dried-up areas with probable higher loadings should be carefully handled and monitored to avoid critical back transport in the open lake. And third, general work in the reed belt or generally in the reed should be accompanied by monitoring to prevent uncontrolled remobilization in the future.
    Keywords adsorption ; lakes ; littoral zone ; organic matter ; oxygen ; perfluorooctane sulfonic acid ; perfluorooctanoic acid ; pollutants ; risk ; rivers ; sediment transport ; sediments ; Austria
    Language English
    Dates of publication 2022-1015
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2022.115871
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Laquinimod ameliorates secondary brain inflammation.

    Nedelcu, Julia / Reinbach, Christin / Riedler, Philipp / Brendel, Matthias / Rominger, Axel / Kaye, Joel / Behrangi, Newshan / Jiangshan, Zhan / Schmitz, Christoph / Kipp, Markus

    Neurobiology of disease

    2019  Volume 134, Page(s) 104675

    Abstract: Accumulating evidence suggests that a degenerative processes within the brain can trigger the formation of new, focal inflammatory lesions in Multiple Sclerosis (MS). Here, we used a novel pre-clinical MS animal model to test whether the amelioration of ... ...

    Abstract Accumulating evidence suggests that a degenerative processes within the brain can trigger the formation of new, focal inflammatory lesions in Multiple Sclerosis (MS). Here, we used a novel pre-clinical MS animal model to test whether the amelioration of degenerative brain events reduces the secondary recruitment of peripheral immune cells and, in consequence, inflammatory lesion development. Neural degeneration was induced by a 3 weeks cuprizone intoxication period. To mitigate the cuprizone-induced pathology, animals were treated with Laquinimod (25 mg/kg) during the cuprizone-intoxication period. At the beginning of week 6, encephalitogenic T cell development in peripheral lymphoid organs was induced by the immunization with myelin oligodendrocyte glycoprotein 35-55 peptide (i.e., Cup/EAE). Demyelination, axonal injury and reactive gliosis were determined by immunohistochemistry. Positron emission tomography (PET) imaging was performed to analyze glia activation in vivo. Vehicle-treated cuprizone mice displayed extensive callosal demyelination, glia activation and enhanced TSPO-ligand binding. This cuprizone-induced pathology was profoundly ameliorated in mice treated with Laquinimod. In vehicle-treated Cup/EAE mice, the cuprizone-induced pathology triggered massive peripheral immune cell recruitment into the forebrain, evidenced by multifocal perivascular inflammation, glia activation and neuro-axonal injury. While anti myelin oligodendrocyte glycoprotein 35-55 peptide immune responses were comparable in vehicle- and Laquinimod-treated Cup/EAE mice, the cuprizone-triggered immune cell recruitment was ameliorated by the Laquinimod treatment. This study clearly illustrates that amelioration of a primary brain-intrinsic degenerative process secondary halts peripheral immune cell recruitment and, in consequence, inflammatory lesion development. These findings have important consequences for the interpretation of the results of clinical studies.
    MeSH term(s) Animals ; Brain/drug effects ; Brain/pathology ; Cuprizone/administration & dosage ; Disease Models, Animal ; Encephalitis/chemically induced ; Encephalitis/immunology ; Encephalitis/pathology ; Female ; Gliosis/chemically induced ; Gliosis/pathology ; Mice, Inbred C57BL ; Multiple Sclerosis/immunology ; Multiple Sclerosis/pathology ; Quinolones/administration & dosage
    Chemical Substances Quinolones ; Cuprizone (5N16U7E0AO) ; laquinimod (908SY76S4G)
    Language English
    Publishing date 2019-11-13
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1211786-9
    ISSN 1095-953X ; 0969-9961
    ISSN (online) 1095-953X
    ISSN 0969-9961
    DOI 10.1016/j.nbd.2019.104675
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Journal: Pelagic Primary Production and Related Parameters in the River Danube near Vienna (Austria)

    Riedler, P. / Schagerl, M.

    Archiv fuer Hydrobiologie. Supplement Volumes: Large Rivers : Organ der Internationalen Vereinigung fuer Theoretische und Angewandte Limnologie

    1998  Volume 11, Page(s) 139–151

    Abstract: In the River Danube downstream of Vienna (river kilometer 1901.5) pelagic primary production and algal class distribution were observed in course of a year. Special importance was attached to the key factors hydrology and light climate. All along the ... ...

    Abstract In the River Danube downstream of Vienna (river kilometer 1901.5) pelagic primary production and algal class distribution were observed in course of a year. Special importance was attached to the key factors hydrology and light climate. All along the study time centric diatoms predominated in the phytoplankton. In winter reduced solar irradiance and low temperature caused chlorophyll-a concentrations below 10 microg/l, similar quantities were measured after spates due to flushing and dilution. As abiotic conditions became appropriate chlorophyll-a reached the maximum of 67 microg/l. For measuring primary production a vertical light gradient was simulated in the laboratory, from which originating data were fitted into a nonlinear regression model. Fundamental parameters defining the P-I function indicate an algal community generally adapted to low light conditions. With regard to water level fluctuations, hourly solar radiation and vertical light attenuation primary production was applied to the field. The results indicate a positive daily net production on an average. In spring, summer and fall mostly autotrophic conditions were calculated, but in winter the pelagic community experienced heterotrophic states over longer periods.
    Keywords Fluss ; Limnisches Oekosystem ; Oekosystemforschung ; Wassermikroorganismen ; Populationsdynamik ; Populationsdichte ; Pelagial ; Algen ; Populationsanalyse ; Hydrologie ; Solarstrahlung ; Diatomeen ; Jahreszeitabhaengigkeit ; Wassertemperatur ; Chlorophyll ; Abiotischer Faktor ; Laborversuch ; Wasserstand ; Schwebstoff ; Feststoff ; Photosynthese ; Atmungsaktivitaet ; Primaerproduktion
    Language English
    Document type Journal
    Database OPAC and Environmental database (ULIDAT) of The Federal Environment Agency (UBA)

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  6. Article: Phytoplanktonzusammensetzung in der Regelsbrunner Au

    Schagerl, Michael / Riedler, Patricia

    2000  , Page(s) S. 43–62

    Abstract: In der vorliegenden Studie wurden fuer Phytoplanktonuntersuchungen zwei charakteristische hydrologische Situationen der Donau herangezogen: Mittel- bis Niederwasser im Herbst 1995 und Mittelwasser mit einer Hochwasserspitze im Fruehjahr 1996. In der ... ...

    Abstract In der vorliegenden Studie wurden fuer Phytoplanktonuntersuchungen zwei charakteristische hydrologische Situationen der Donau herangezogen: Mittel- bis Niederwasser im Herbst 1995 und Mittelwasser mit einer Hochwasserspitze im Fruehjahr 1996. In der Untersuchung konnten insgesamt 264 Algentaxa beobachtet werden. Mit 150 Arten waren Bacillariophyceae am staerksten vertreten, mit 79 Arten folgten Chlorophyta. Schluesselparameter fuer die Artengemeinschaften ist die Hydrologie. Das Artenspektrum in der Regelsbrunner Au unterschied sich nicht wesentlich von jenem der Donau, es kam jedoch zu einer Verschiebung in den Haeufigkeiten. Neben den typischen zentralen Donaukieselalgen traten zunehmend auch raschwuechsige Flagellaten auf. Der stromauf gelegene Standort Haslau wies die groessten Mengen an Algen auf. Die gegenueber der Donau verminderte Stroemung fuehrte hier zu einer besseren Durchlichtung der Wassersaeule. Der flussab gelegene Teil des Hauptarmes wies gegenueber den anderen Probepunkten im Hauptarm geringere Schwankungen der Algenbiomasse auf. Bei Durchgang von Hochwasserwellen wurde in den untersten Bereichen des Hauptarmes Donauwasser rueckgestaut. Hier konnten sich vermehrt Algen halten, diese Zone stellt gewissermassen einen Refugialraum fuer Phytoplankton (-Organismen) dar.
    Keywords Hydrologie ; Algen ; Organismen ; Artenvielfalt ; Geisseltierchen ; Phytoplankton ; Flussaue ; Auenlandschaft ; Fliessgewaesser ; Pelagial ; Biozoenose ; Wasserprobe ; Oekologische Bestandsaufnahme ; Probenahme ; Biomasse ; Artenliste ; Populationsdichte ; Gruenalgen ; Diatomeen ; Plankton ; Aquatisches Oekosystem ; Chlorophyll ; Nachweisbarkeit ; Hochwasser ; Niedrigwasser ; Arteninventar ; Artenbestand
    Language German
    Document type Article
    Database OPAC and Environmental database (ULIDAT) of The Federal Environment Agency (UBA)

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  7. Article: Phytoplanktonsukzession in einem Donaualtarm bei Regelsbrunn

    Riedler, Patricia / Schagerl, Michael

    1999  , Page(s) 610–613

    Abstract: 30 km oestlich von Wien befindet sich eine der letzten weitgehend urspruenglichen Flusslandschaften der Donau - die Regelsbrunner Au. Das Gebiet wird von einem 200 m breiten Altarm dominiert, der ab 1.5 m ueber der Donau-Mittelwasserlinie 85 oberflaechig ...

    Abstract 30 km oestlich von Wien befindet sich eine der letzten weitgehend urspruenglichen Flusslandschaften der Donau - die Regelsbrunner Au. Das Gebiet wird von einem 200 m breiten Altarm dominiert, der ab 1.5 m ueber der Donau-Mittelwasserlinie 85 oberflaechig an den Hauptstrom angebunden ist. Diese starke Vernetzung bedingt, dass Wasserstandsschwankungen des Flusses nicht nur physikalische und chemische Parameter, sondern auch die Planktongemeinschaft im Altarm nachhaltig beeinflussen. Im Rahmen dieser Studie wurde der steuernde Effekt der Hydrologie auf die Biomasse und Diversitaet des Phytoplanktons im Regelsbrunner Altarm untersucht. Biomasseberechnungen erfolgten nach Utermoehl (1958);zur Bestimmung der Diversitaet wurde der Index nach Shannon & Wiener (1948) herangezogen.
    Keywords Phytoplankton ; Hydrologie ; Auenlandschaft ; Kenngroesse ; Fluss ; Netz ; Diversitaet ; Biomasse ; Altwasser (Fluss) ; Sukzession (Oekologie) ; Flussaue ; Besiedlung ; Hydrobiologie ; Limnisches Oekosystem ; Algen ; Hochwasser ; Jahreszeitabhaengigkeit ; Artenvielfalt ; Biozoenose ; Niedrigwasser
    Language German
    Document type Article
    Database OPAC and Environmental database (ULIDAT) of The Federal Environment Agency (UBA)

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  8. Article: Phytoplanktonentwicklung und Primaerproduktion im Donauauensystem Regelsbrunn (Oesterreich)

    Schagerl, Michael / Riedler, Patricia

    1998  , Page(s) 564–568

    Abstract: Die grosse Donauregulierung im vorigen Jahrhundert fixierte das Hauptbett der Donau und trennte Seitenarme vom Hauptstrom durch den Treppelweg ab. Dadurch wurden oberflaechige Anbindungen der Auensysteme an den Hauptstrom stark reduziert. Um den ... ...

    Abstract Die grosse Donauregulierung im vorigen Jahrhundert fixierte das Hauptbett der Donau und trennte Seitenarme vom Hauptstrom durch den Treppelweg ab. Dadurch wurden oberflaechige Anbindungen der Auensysteme an den Hauptstrom stark reduziert. Um den Verlandungstendenzen entgegenzuwirken, entwickelte die Universitaet Wien gemeinsam mit der Wasserstrassendirektion ein Projekt zur Gewaesservernetzung der Regelsbrunner Au. Im Zuge von status-quo Erhebungen vor der Dotation wurde auch Phytoplankton untersucht. In dynamischen Augewaessern wie der Regelsbrunner Au kann es in Abhaengigkeit von der Hydrologie zu kurzzeitigen Stagnationen kommen. Die damit verlaengerte Verweildauer des Wassers wirkt sich nachhaltig auf die pelagischen Lebensgemeinschaften aus, das Plankton unterscheidet sich dann grundlegend von jenem aus dem Hauptstrom. Zur Zeit ist die Regelsbrunner Au an 20 Tagen oberstromig an den Donaustrom angebunden, nach Baumassnahmen im Zuge des Vernetzungsprojektes (u.a. Absenkungen des Treppelweges und der Traversen) wird das Ausystem an 220 Tagen oberflaechig mit der Donau kommunizieren.
    Keywords Biozoenose ; Plankton ; Hydrologie ; Phytoplankton ; Flussaue ; Primaerproduktion ; Biologische Entwicklung ; Hydrobiologie ; Limnisches Oekosystem ; Biotopvernetzung ; Naturnaher Gewaesserausbau ; Austauschprozess ; Au ; Diatomeen ; Algen ; Globalstrahlung ; Naehrstoffgehalt ; Jahreszeitabhaengigkeit ; Pelagial
    Language German
    Document type Article
    Database OPAC and Environmental database (ULIDAT) of The Federal Environment Agency (UBA)

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  9. Book: Grundstückserwerb in der Schweiz

    Petzold, Veronika / Riedler, P

    Beschränkungen des Erwerbs bebauter und unbebauter Grundstücke und Eigentumswohnungen durch Ausländer ; Vertragsabschluss und Grundbucheintragung ; Besteuerung ; Finanzierung ; Verwaltung

    (CH-D Fachschriften)

    1990  

    Institution Handelskammer Deutschland-Schweiz
    Author's details Veronika Petzold und Steuerteil P. Riedler
    Series title CH-D Fachschriften
    Language German
    Size 30 S
    Publisher Handelkammer Deutschland-Schweiz
    Publishing place Zürich
    Document type Book
    Database Former special subject collection: coastal and deep sea fishing

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  10. Journal: Hydrology as a Major Factor Determining Plankton Development in Two Floodplain Segments and the River Danube, Austria

    Hein, T. / Baranyi, C. / Heiler, G. / Holarek, C. / Riedler, P. / Schiemer, F.

    Archiv fuer Hydrobiologie. Supplement Volumes: Large Rivers : Organ der Internationalen Vereinigung fuer Theoretische und Angewandte Limnologie

    1999  Volume 11, Page(s) 439–452

    Abstract: Hydrological connectivity is central to the understanding of ecological processes in large river-floodplain systems. Effects of hydrological connectivity were investigated in context with the restoration of ecological integrity. In Austria, downstream of ...

    Abstract Hydrological connectivity is central to the understanding of ecological processes in large river-floodplain systems. Effects of hydrological connectivity were investigated in context with the restoration of ecological integrity. In Austria, downstream of Vienna, the River Danube and two floodplain segments were compared, based on their hydrological and physico-chemical conditions. The biomass of bacterio-, phyto-, proto- and metazooplankton was studied along with the controlling environmental factors influenced by hydrological processes. Lotic conditions led to higher phytoplankton biomass, whereas under lentic conditions the heterotrophic compartments dominated the plankton. The biomass ratio of phyto- to bacterioplankton declined as hydrological connectivity decreased.
    Keywords Hydrologie ; Fluss ; Flussaue ; Ueberschwemmungsgebiet ; Fauna ; Plankton ; Wasserorganismen ; Limnisches Oekosystem ; Einzugsgebiet ; Ufer ; Biomasse ; Populationsdynamik ; Bakterien ; Phytoplankton ; Zooplankton ; Populationsanalyse ; Populationsdichte ; Naehrstoffgehalt ; Geloeste Stoffe ; Phosphat ; Gesamtphosphor ; Nitrat ; Ammonium ; Silikat ; Organische Substanz ; Anorganische Substanz ; Wasserstand ; Temperaturabhaengigkeit ; Messstation ; Geisseltierchen
    Language English
    Document type Journal
    Database OPAC and Environmental database (ULIDAT) of The Federal Environment Agency (UBA)

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