In diesem Vorhaben wird die Wechselwirkung von Photosynthesepigmenten und Proteinen auf molekularer Ebene untersucht, um besser zu verstehen, unter welchen Bedingungen absorbiertes Licht für die Photosynthese genutzt wird und unter welchen Bedingungen die Energie als Wärmeabstrahlung verloren geht. Ein genaueres Verständnis der zugrunde liegenden Funktionsmechanismen ist z.B. notwendig, um in Zukunft pflanzliche Carotinoide verstärkt in der Biotechnologie einsetzen zu können. In dem Vorhaben wird die molekulare Pigmentorganisation und ihre lichtabhängige Dynamik in einer einzelligen Alge untersucht, die sich durch eine besonders reichhaltige Pigmentierung auszeichnet. Es konnte gezeigt werden, dass der dem Lichtschutz dienende Xanthophyllzyklus bei Diatomeen zusätzlich eine zentrale Rolle in der Regulation der Pigmentbiosynthese spielt. In Mantoniella konnte ein unvollständiger Xanthopyllzyklus nachgewiesen werden. Damit eröffnet sich die Möglichkeit, die Evolution des Lichtschutzes in der Photosynthese experimentell zu untersuchen.
Die Publikation enthält die Ergebnisse einer EU-weiten Recherche zu den statistischen Methoden, die zur Erfüllung der Berichtspflichten gegenüber der EU genutzt werden. Recherchiert wurden die Methoden, die für die Erhebung der erneuerbaren Strom- und Wärmemengen, die nicht in zentrale Netze eingespeist werden, genutzt werden. In 27 EU-Mitgliedstaaten sowie der Schweiz und Großbritannien wurden durch muttersprachliche Rechercheure*Rechercheurinnen in Interviews mit Experten*Expertinnen des jeweiligen Landes Informationen zu den eingesetzten Methoden erhoben. Den Interviews wurden Literatur- und Internetrecherchen vorangestellt. Die statistischen Methoden sind in der Publikation transparent beschrieben und vergleichend dargestellt. Es sind Informationen zu den folgenden Energieträgern enthalten: zur Stromerzeugung aus Windkraft, Photovoltaik, Wasserkraft, Geothermie, fester und flüssiger Biomasse und Biogasen sowie zur Wärme- und Kälteerzeugung aus fester und flüssiger Biomasse, aus Biogasen, Biokraftstoffen jenseits des Verkehrssektors, Solarthermie, Umweltwärme und Geothermie. Für die Wärmenutzung wurde außerdem nach den Sektoren Private Haushalte, Industrie, Dienstleistungen und Landwirtschaft unterschieden. Vier der recherchierten Methoden wurden nach festgelegten Kriterien ausgewählt und näher analysiert; eine Übertragbarkeit auf Deutschland wurde geprüft. Abschließend wurden Empfehlungen für nächste Schritte abgeleitet. Quelle: Forschungsbericht
Vergleich der Befliegung Sommer 2017 und Mai 2002
Das Ziel des Forschungsvorhabens besteht darin, die unterschiedlichen Demokratiemuster (patterns of democracy) sowie die Leistungsbilanzen von politischen Systemen (policy performance) in 10 mittel- und osteuropäischen Ländern im Zeitraum von 1995 bis 2005 empirisch zu identifizieren und analytisch zu verbinden. Theoretisch gehen wir dabei von der 'institutions do matter'-Annahme aus. In Weiterentwicklung des Ansatzes von Arend Lijphart (1999) schlagen wir ein dreidimensionales Demokratiemodel vor, das institutionelle wie akteursbezogene Strukturmerkmale verbindet. Demokratische Systeme sind institutionell durch zwei Dimensionen definiert: das Wahlsystem (elektorale Entscheidungsregel) und das Regierungssystem, hier definiert als die Vetomacht außerparlamentarischer Institutionen gegenüber Regierung und Parlament (legislative Entscheidungsregel). Da Politiken nicht allein in institutionellen Rahmenbedingungen entstehen, sondern in diesen von Akteuren beschlossen und umgesetzt werden, untersucht die dritte Dimension die Akteurskonstellation in Regierung und Parlament. Die durch diese drei Dimensionen definierten Demokratiemuster werden mit policy-Mustern in den Politikfeldern Wirtschaft, Soziales und Umwelt in Beziehung gesetzt. Empirisch soll der Einfluss der Demokratiemuster auf die Leistungsbilanz von politischen Systemen vor dem Hintergrund der historischen Entwicklungen (legacies) und der internationalen Einbindung der einzelnen mittel- und osteuropäischen Länder erklärt werden. Insofern werden die traditionellen Analysen über Politikperformanz in westlichen Ländern um die für Mittel- und Osteuropa bedeutenden Fragen 'does history matter' bzw. 'does globalization matter' ergänzt. Methodisch basiert das Forschungsvorhaben auf der Anwendung der makro-quantitativen Vielländeranalyse (Aggregatdatenanalyse). Eingang in die Analyse finden jene Länder der Mittel- und Osteuropa, die empirisch vergleichbar sind (most similar systems design).
The sites that were to become experimental areas were selected by coworkers of the Special Research Project Forest Ecosystem Restoration (SRP), as they allowed for a comparison of pairs of pure spruce stands and natural mixed stands. The selection of such sites was limited to the northern Alpine piedmont at the altidude between 400 and 800 metres above sea level. The experimental site Kreisbach in Lower Austria (municipality of Wilhelmsburg, district Lilienfeld) as well as the experimental site Schwemmbach in Upper Austria (municiplaity of St. Johann am Walde, district Braunau am Inn) were selected to become the areas of investigation. It is the aim of this study to evaluate the effects of forest ecosystem restoration on the discharge of floods. It could be stated that ideal discharge conditions prevail on all forest stands examined. There could not be found any significant difference between the different stand types. In part, this may be well explained by the high site quality classes on the examined grounds. The pure spruce stands lacked high raw humus horizons, which are responsible for the hydrophobe behavior. Despite contrary notes in the literature (AULITZKY 1989) on the flysch sites extremely low surface runoff coiffizients were determined. This may be due to the fact that the damming layers lie too deep to cause the emergence of strong surface discharge in the forests.
Sea ice is a major source of atmospheric sea salt in Antarctica. This recent finding triggered a change in paradigm for the paleoclimatic interpretation of polar ice core records. Moreover, the release of reactive gas-phase halogens from the salty ice surface and of salt aerosol is of major importance for the tropospheric chemistry. The presence of reactive bromine in the polar troposphere causes the often complete depletion of ozone in the boundary layer, and a fast oxidation of other trace species such as mercury and the biologically produced dimethyl sulfide (DMS). An oxidation product of the latter, methanesulfonic acid (MSA), and sea salt concentration from ice core records have been used as proxies to infer information about the past sea ice extent. We propose to investigate the processes related to the salt aerosol generation on the sea ice surface, the atmospheric salt transport, the halogen release, and the impact on the tropospheric composition in a joint project. Here we describe one part of this project: the remote sensing of tropospheric BrO and the analysis of source regions and transport patterns. The analysis of the sea ice parameters from remote sensing data, the development of a sea ice aerosol model and the investigation of the major ions from Neumayer station aerosol filter measurements as well as from existing ice core and snow pit records is part of a joint proposal by the University of Hamburg. The lagrangian modeling of aerosol transport and halogen chemistry is part of a parallel proposal from the MPI Mainz. The proposed joint project is embedded in the International Polar Year IPY core project 'Air Ice Chemical Interactions (AICI-IPY)'.
In the scope of the planned project the diversity and ecology of microbial communities and their functions in nutrient turnover under the extreme conditions in Arctic and Antarctic periglacial environments will be studied. Polar regions are vast and unique natural laboratories, both because of their geographical isolation and the minor anthropogenic influences active there, for studying microbial life under extreme environmental conditions. For this purpose the diversity and abundance of the microflora in dependence of important site characteristics such as hydrological, thermal and weathering processes will be investigated in different habitats on Store Koldewey (East Greenland) and Livingstone Island (Antarctic). The main objectives are the genotypic and phenotypic characterization of the microbial community by cultivation-independent methods such as lipid profiling and rRNA-based analyses. Stable isotope probing will be used to identify the main microbial players in nutrient turnover in the different environments. The acquired data will give insights into the early stage of life on Earth, the development of extreme habitats and the functioning of microbes within the ecosystem. The planed study contributes to the research topics of the International Polar Year proposal entitled Antarctic and sub-Antarctic Permafrost, Periglacial and Soil Environments (ANPAS, No. 627) leaded by Dr. Jan Boelhouwers.
The aim of 2-FUN is to provide decision-makers with a Decision Support System (DSS) that supports the analysis of current and future trends in environmental conditions and pressures causing health problems, and to evaluate and rank the management options of the composing risk factors using a cost-benefit evaluation. The DSS and its associated Geographical Information System (GIS) will offer a wide range of functionalities allowing the generation of results of high concern for health risk assessment: building of long-term environmental and socio-economic scenarios, exposure and effects mapping, provision of uncertainty margins, identification of sensitive pathways and risks, integrated risk indices and monetary values mapping, ranking of risk factors. Specific scientific actions will be set up to feed the DSS with methodologies/databases/models/ software on the following topics: Building future realistic socio-economic, environmental and health scenarios; Integrated exposure, effect and monetary assessment of multi-stressors and multi-routes; Integration of childrens issues in health risk assessments; Environment-related health indicators for relevant ranking and comparison of risk factors and monetary valuation of health effects; Development of uncertainty models for further health management; Implementation of a full-chain approach for health risk assessment and cost-benefit analysis. 2-FUN also proposes to engage in a structural dialogue with all interested parties (stakeholders, policy-makers and researchers) to monitor large environment- and health-focused scientific initiatives and to incorporate stakeholders vision and needs regarding the development of tools for health risk assessment. The DSS will be tested on contrasted case studies covering a wide range of temporal, spatial, sectorial, environmental, societal contexts requiring comprehensive costbenefit analysis and able to provide policy-makers with relevant and easy-to-use information. Prime Contractor: Institut National de l'Environnement Industriel et des Risques; Paris; France.
This project is part of the large multidisciplinary CCES project RECORD (Assessment and Modeling of Coupled Ecological and Hydrological Dynamics in the Restored Corridor of the River Thur). It deals with the role of microbial transformations and plant uptake in the cycling of nitrogen in different functional processing zones of a restored section of river Thur. The results will help to gain a better understanding of the filter function of restored river corridors and of their potential to emit greenhouse gases. Main hypothesis: Nitrogen fluxes and transformations in floodplains strongly depend on the specific response of microorganisms and dominant plants in different functional processing zones to the hydrologic conditions that vary with season and flooding events. Objectives: At the example of a restored section of river Thur, we want to gain a better insight into the role of riparian systems as sink or source of nitrogen species and the potential risks for drinking water sources and atmosphere. Specific objectives: - quantify the rates of microbial nitrogen transformations within the model floodplain: comparison between different functional processing zones, temporal variations due to seasonal climatic and biological effects and flooding events, dependence on governing soil parameters (temperature, moisture, redox potential). - quantify the rates of nitrogen species uptake by model plants (Phalaris arundinacea, Salix alba): potential uptake depending on nutrient availability and nutrient balance; effects of plant age and and temporary flooding. - measure and model nitrogen species concentrations in the soil solution and nitrous oxide emissions: comparison between different functional processing zones, temporal variations due to seasonal climatic and biological effects and flooding events. Methods: - Sampling and monitoring plots with a diameter of 8m have been set-up in different functional processing zones: (i) pasture in a neighboring non-restored section, (ii) river-forest transect including weakly colonized gravel, gravel covered by fine over-bank material densely overgrown with reed grass (Phalaris arundinacea) and other herbaceous species, zone planted with willow (Salix alba) during the restoration, mixed deciduous forest dominated by ash, (iii) old riparian willow forest. - Microbial nitrogen transformation rates are determined from soil samples taken from within the plots at specific times. Mineralisation immobilisation turnover (MIT) is determined by isotopic dilution, potential denitrification by acetylen-inhibition incubation. - Specific nitrate and ammonium uptake rates by model plants are determined in hydroponic treatments in the climate chamber. - Soil respiration and trace gas efflux/influx is measured by in-situ gas sampling from within large rings permanently installed on the plots followed by GC analysis. Etc.
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