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  • 1
    Online Resource
    Online Resource
    Entwicklung eines innovativen Kulturbegründungsverfahrens für Eichen zur Verbesserung der Wurzelentwicklung durch kompostierbare Wurzelhüllen : Schlussbericht zum Verbundvorhaben : Laufzeit: 01.10.2018 bis 31.12.2021 (2022)
    [Berlin] : [Humboldt-Universität zu Berlin, Lebenswissenschaftliche Fakultät, Fachgebiet Urbane Ökophysiologie der Pflanzen]
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (41 Seiten, 3,69 MB) , Illustrationen, Diagramme
    URL: https://edocs.tib.eu/files/e01fb23/1853079146.pdf
    URL: https://doi.org/10.2314/KXP:1853079146
    DOI: 10.2314/KXP:1853079146
    Language: German
    Note: Förderkennzeichen BMEL 22004717, 22024317, 22023317 , Verbundnummer 01182651
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  • 2
    Electronic Resource
    Electronic Resource
    Fluktuationen der Fischfauna im Elbe-Ästuar als Indikator für ein gestörtes Ökosystem (1981)
    Springer
    Helgoland marine research 34 (1981), S. 263-285 
    Details
    ISSN: 1438-3888
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract During 1978, 22 fish species (in particularAnguilla anguilla L.,Platichthys flesus L.,Osmerus eperlanus L.,Gasterosteus aculeatus L.,Lampetra fluviatilis L.,Alosa fallax [Lacepede],Gymnocephalus cernua L.,Clupea harengus L. andSprattus sprattus L.), sampled at the intake of the cooling system in the nuclear power plant at Brunsbüttel (Elbe estuary), were analyzed for quantities and size distribution. The data obtained were correlated to abiotic factors, such as water temperature, water outflow from the upper Elbe river, salinity and oxygen content. Spawning times and seasonal migrations of the fish species investigated corresponded to appropriate temperatures of the Elbe water. The diversity of fish species from the cooling water proved to be representative for the ichthyo-fauna of this particular estuarine area. At least 190 tons of fish per year were estimated to be annihilated by the suction of cooling water into the nuclear power plant. In spite of the progressive development of regional industries and the increasing discharges of cooling water, temperature in the estuary has remained largely unaffected up till now. The oxygen content of the heavily polluted lower Elbe river, however, has become mainly dependent on the amount of fresh water flowing from the upper Elbe river. Up to 1978, oxygen levels of 80–90 % were recorded only in the mouth of the Elbe, thus meeting the requirements for the continuous occurrence of fish species typical for this estuarine area. Varying oxygen concentrations downstream of Hamburg and at Brunsbüttel are considered to be responsible for migrations of certain fish species (mainly flounder and smelt) between the Brunsbüttel region and their habitats further upstream which were occupied before the process of industrialisation initiated. This was reflected by the size of the samples taken from various fishes. During an eventual hazard of the industrial filter plants at Brunsbüttel in May 1978 an extreme oxygen depletion occurred for nearly 2 weeks. This event coincided with the death of certain age groups of fish.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02074123
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  • 3
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    Effects of various pollutant mixtures on immune responses of the blue mussel (Mytilus edulis) collected at a salinity gradient in Danish coastal waters, links to supplementary material (2014)
    PANGAEA
    In:  Supplement to: Höher, Nicole; Köhler, Angela; Strand, Jakob; Broeg, Katja (2012): Effects of various pollutant mixtures on immune responses of the blue mussel (Mytilus edulis) collected at a salinity gradient in Danish coastal waters. Marine Environmental Research, 75, 35-44, https://doi.org/10.1016/j.marenvres.2011.11.003
    Details
    Publication Date: 2023-01-13
    Description: The Baltic Sea is a semi-enclosed sea with a steady salinity gradient (3 per mil–30 per mil). Organisms have adapted to such low salinities, but are suspected to be more susceptible to stress. Within the frame of the integrated environmental monitoring BONUS + project "BEAST" the applicability of immune responses of the blue mussel was investigated in Danish coastal waters. The sampling sites were characterised by a salinity range (11–19 per mil) and different mixtures of contaminants (metals, PAHs and POPs), according to chemical analysis of mussel tissues. Variation partitioning (redundancy analysis) was applied to decompose salinity and contamination effects. The results indicated that cellular immune responses (total and differential haemocyte count, phagocytic activity and apoptosis) were mainly influenced by contaminants, whereas humoral factors (haemolytic activity) were mainly impacted by salinity. Hence, cellular immune functions may be suitable as biomarkers in monitoring programmes for the Baltic Sea and other geographic regions with salinity variances of the studied range.
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 603.6 kBytes
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    DATA PANGAEA
  • 4
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    Immunomodulating effects of environmentally realistic copper concentrations in Mytilus edulis adapted to naturally low salinities, link to supplementary material (2014)
    PANGAEA
    In:  Supplement to: Höher, Nicole; Regoli, Francesco; Dissanayake, Awantha; Nagel, Matthias; Kriews, Michael; Köhler, Angela; Broeg, Katja (2013): Immunomodulating effects of environmentally realistic copper concentrations in Mytilus edulis adapted to naturally low salinities. Aquatic Toxicology, 140-141, 185-195, https://doi.org/10.1016/j.aquatox.2013.06.001
    Details
    Publication Date: 2023-01-13
    Description: The monitoring of organisms' health conditions by the assessment of their immunocompetence may serve as an important criterion for the achievement of the Good Environmental Status (GES) as defined in the Marine Strategy Framework Directive (EU). In this context, the complex role of natural environmental stressors, e.g. salinity, and interfering or superimposing effects of anthropogenic chemicals, should be carefully considered, especially in scenarios of low to moderate contamination. Organisms from the Baltic Sea have adapted to the ambient salinity regime, however energetically costly osmoregulating processes may have an impact on the capability to respond to additional stress such as contamination. The assessment of multiple stressors, encompassing natural and anthropogenic factors, influencing an organisms' health was the main aim of the present study. Immune responses of Mytilus edulis, collected and kept at natural salinities of 12 per mil (LS) and 20 per mil (MS), respectively, were compared after short-term exposure (1, 7 and 13 days) to low copper concentrations (5, 9 and 16 µg/L Cu). A significant interaction of salinity and copper exposure was observed in copper accumulation. LS mussels accumulated markedly more copper than MS mussels. No combined effects were detected in cellular responses. Bacterial clearance was mostly achieved by phagocytosis, as revealed by a strong positive correlation between bacterial counts and phagocytic activity, which was particularly pronounced in LS mussels. MS mussels, on the other hand, seemingly accomplished bacterial clearance by employing additional humoral factors (16 µg/L Cu). The greatest separating factor in the PCA biplot between LS and MS mussels was the proportion of granulocytes and hyalinocytes while functional parameters (phagocytic activity and bacterial clearance) were hardly affected by salinity, but rather by copper exposure. In conclusion, immune responses of the blue mussel may be suitable and sensitive biomarkers for the assessment of ecosystem health in brackish waters (10-20 per mil S).
    Type: Dataset
    Format: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 23 kBytes
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  • 5
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    CO2-induced fertilization impairment in Strongylocentrotus droebachiensis collected in the Arctic (2014)
    PANGAEA
    In:  Supplement to: Bögner, Desislava; Bickmeyer, Ulf; Köhler, Angela (2014): CO2-induced fertilization impairment in Strongylocentrotus droebachiensis collected in the Arctic. Helgoland Marine Research, 68(2), 341-356, https://doi.org/10.1007/s10152-014-0394-3
    Details
    Publication Date: 2024-03-15
    Description: Fertilization depends on distribution and aggregation patterns of sea urchins which influence gamete contact time and may potentially enhance their vulnerability to ocean acidification. In this study, we conducted fertilization experiments to assess the effects of selected pH scenarios on fertilization success of Strongylocentrotus droebachiensis, from Spitsbergen, Arctic. Acidification was achieved by aerating seawater with different CO2 partial pressures to represent pre-industrial and present conditions (measured ~180-425 µatm) and future acidification scenarios (~550-800, ~1,300, ~2,000 µatm). Fertilization success was defined as the proportion of successful/unsuccessful fertilizations per treatment; eggs were classified according to features of their fertilization envelope (FE), hyaline layer (HL) and achievement of cellular division. The diagnostic findings of specific pathological aberrations were described in detail. We additionally measured intracellular pH changes in unfertilized eggs exposed for 1 h to selected acidification treatments using BCECF/AM. We conclude that (a) acidified conditions increase the proportion of eggs that failed fertilization, (b) acidification may increase the risk of polyspermy due to failures in the FE formation supported by the occasional observation of multiple sperms in the perivitelline space and (c) irregular formation of the embryo may arise due to impaired formation of the HL. The decrease in fertilization success could be also related to the observed changes in intracellular pH at pCO2 ~ 1,000 µatm or higher.
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Aragonite saturation state; Arctic; Benthic animals; Benthos; Bicarbonate ion; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Coast and continental shelf; Comment; Containers and aquaria (20-1000 L or 〈 1 m**2); Coulometric titration; Echinodermata; Eggs; Egg stages; Experiment; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Laboratory experiment; Mediterranean stages; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Polar; Potentiometric; Potentiometric titration; Relative fluorescence intensity, ratio; Replicate; Reproduction; Salinity; Salinity, standard deviation; Single species; Species; Stage; Strongylocentrotus droebachiensis; Temperature, water; Temperature, water, standard deviation; Time in hours; Treatment
    Type: Dataset
    Format: text/tab-separated-values, 68836 data points
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  • 6
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    The fate of microplastics in the marine isopod Idotea emarginata (2014)
    American Chemical Society
    In:  EPIC3Environmental Science and Technology, American Chemical Society, 48, pp. 13451-13458, ISSN: 0013-936X
    Details
    Publication Date: 2014-11-21
    Description: Plastic pollution is an emerging global threat for marine wildlife. Many species of birds, reptiles and fishes are directly impaired by plastics as they can get entangled in ropes and drown or they can ingest plastic fragments which, in turn, may clog their stomachs and guts. Microplastics of less than 1 mm can be ingested by small invertebrates but their fate in the digestive organs and their effects on the animals are yet not well understood. We embedded fluorescent microplastics in artificial agarose-based food and offered the food to marine isopods, Idotea emarginata. The isopods did not distinguish between food with and food without microplastics. Upon ingestion, the microplastics were present in the stomach and in the gut but not in the tubules of the midgut gland which is the principal organ of enzyme-secretion and nutrient resorption. The feces contained the same concentration of micro-plastics as the food which indicates that no accumulation of microplastics happens during the gut passage. Long-term bioassays of six weeks showed no distinct effects of continu¬ous micro-plastic consumption on mortality, growth, and intermolt duration. I. emarginata are able to prevent intrusion of particles even smaller than 1 µm into the midgut gland which is facilitated by the complex structure of the stomach including a fine filter system. It separates the midgut gland tubules from the stomach and allows only the passage of fluids and chyme. Our results indicate that micro¬plastics, as administered in the experi¬ments, do not clog the digestive organs of isopods and do not have adverse effects on their life history parameters.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 7
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    From mid to high latitudes: marine litter research at the Alfred Wegener Institute (AWI) (2013)
    In:  EPIC3International Conference on Prevention and Management of marine Litter in European Seas, Berlin, 2013-04-10-2013-04-12
    Details
    Publication Date: 2014-10-07
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 8
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    Bis in die abgelegensten Winkel der Erde - Forschung des AWI zu Plastik in den Meeren (2017)
    In:  EPIC3"Alles Plastik, oder was? Mülltonne Meer" Veranstaltung der Niedersächsischen Staatskanzlei, Europäischen Informations-Zentrums Niedersachsen
    Details
    Publication Date: 2017-02-10
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 9
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    Determination of kinetic properties of G6PDH and PGDH and the expression of PCNA during liver carcinogenesis in coastal flounder (1998)
    In:  EPIC3Marine environmental research, 46(1), pp. 179-183
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 10
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    Identification of six mRNA sequences of genes related to multi xenobiotic resistance (MXR) and biotransformation in Mytilus edulis (2002)
    In:  EPIC3Marine ecology-progress series, 238, pp. 115-124
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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