Description: Das Projekt "Abundance, activity and interreation of phototrophic and chemotrophic microbial iron oxidation in freshwater sediments" wird vom Umweltbundesamt gefördert und von Universität Tübingen, Zentrum für Angewandte Geowissenschaften (ZAG), Arbeitsgruppe Geomikrobiologie durchgeführt. In freshwater sediments, iron oxidation is dominated by phototrophic and chemotrophic (aerobic and nitrate-reducing) Fe(ll)-oxidizing microorganisms. Although these biogeochemical processes have been investigated in detail in laboratory studies, not much is known about their spatial distribution, interactions (e.g. competition) amongst each other, as well as their response towards environmental perturbations (i.e. temperature, geochemical variations (nutrient, organic matter input)). This research proposal aims to investigate the activity, abundance and resource competition between different chemotrophic (aerobic and (autotrophic/mixotrophic) anaerobic nitrate-reducing) and phototrophic ironoxidizing microorganisms. In order to better understand the spatial distribution of nitrate-reducing iron oxidizing bacteria, microbial nitrate-producing and competing, nitrate-depletion processes will also be studied throughout the sedimentary redox gradient. In addition, the activity and abundance of the ironoxidizing processes will be quantified with (geo)microbiological, molecular and novel spectral imaging techniques. Using high resolution geochemical measurements (microsensors) we will characterize the environmental conditions these bacteria experience in order to determine the role of spatial and functional niche competition in microbial iron oxidation and the interconnection to the N-cycle. Iron mineral formation will be investigated as a function of the microbial spatial and temporal activity, depending on environmental perturbations. The proposed research study will strongly improve the understanding of iron cycling, the interconnection to the N-cycle, as well as interactions and competition between phototrophic and chemotrophic metabolisms in aquatic environments.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Tübingen ? Eisen ? Aerobe Bedingungen ? Anaerobe Bedingungen ? Eisenbakterien ? Geochemie ? Nährstoff ? Temperaturverteilung ? Brunnen ? Hydrogeologie ? Organisches Material ? Süßwasser ? Temperatur ? Bakterien ? Limnologie ? Bildung ? Hydrochemie ? Nährstoffeintrag ? Aquatisches Ökosystem ? Oxidation ? Siedlungswasserwirtschaft ? Studie ? Technik ? Mikroorganismen ? Sediment ? Messung ? Ressource ? Forschungseinrichtung ? Fahrradfahren ? Standortbedingung ? Stoffwechsel ? Hydrologie ? Umwelt ? Mineral ? Änderung ? Forschung ? Integrierte Wasser-Ressourcen Bewirtschaftung ? NEU ? Erlass [Recht] ? MICROBIOLOGISCH ? RAEUMLICHE VERTEILUNG ? SONSTIG ? STARK ? VERANTWORTUNG ? VERTEILUNG ? VORSCHLAEGE ? BIOGEOCHEMISCH ? VORSCHLAG ? Wechselwirkung ? FUNKTION ? SEDIMENTAER ?
Region: Baden-Württemberg
Bounding box: 9° .. 9° x 48.5° .. 48.5°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2012-01-01 - 2024-11-29
Webseite zum Förderprojekt
https://gepris.dfg.de/gepris/projekt/214256163 (Webseite)Accessed 1 times.