A5059614261- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Plant responses to elevated CO2
- Microbial Community Ecology and Physiology
- Plant nutrient uptake and metabolism
- Soil and Water Nutrient Dynamics
- Geology and Paleoclimatology Research
- Coastal wetland ecosystem dynamics
- Plant Micronutrient Interactions and Effects
- Climate change and permafrost
- Plant responses to water stress
- CO2 Sequestration and Geologic Interactions
- Legume Nitrogen Fixing Symbiosis
- Plant Water Relations and Carbon Dynamics
- Phosphorus and nutrient management
- Rice Cultivation and Yield Improvement
- Phytase and its Applications
- Gut microbiota and health
- Atmospheric chemistry and aerosols
- Isotope Analysis in Ecology
- Iron oxide chemistry and applications
- Groundwater flow and contamination studies
- Cryospheric studies and observations
University of Göttingen
2014-2024
University of Münster
2023-2024
Institute of Groundwater Ecology
2024
Peoples' Friendship University of Russia
2023
University of Tyumen
2021-2022
Universität Greifswald
2010-2011
University of Bayreuth
2008-2010
Institute of Physical-Chemical and Biological Problems in Soil Science
2006-2009
University of Hohenheim
2007-2009
Abstract Increased belowground carbon (C) transfer by plant roots at elevated CO 2 may change properties of the microbial community in rhizosphere. Previous investigations that focused on total soil organic C or showed contrasting results: small increase, decrease no changes. We evaluated effect 5 years (550 ppm) four extracellular enzymes: β ‐glucosidase, chitinase, phosphatase, and sulfatase. expected microorganisms to be differently localized aggregates various sizes and, therefore...
Abstract Increasing the belowground translocation of assimilated carbon by plants grown under elevated CO 2 can cause a shift in structure and activity microbial community responsible for turnover organic matter soil. We investigated long‐term effect atmosphere on biomass specific growth rates root‐free rhizosphere The experiments were conducted two free air dioxide enrichment (FACE) systems: Hohenheim Braunschweig, as well intensively managed forest mesocosm Biosphere Laboratory (B2L)...
Abstract Permafrost peatlands are biogeochemical hot spots in the Arctic as they store vast amounts of carbon. thaw could release part these long‐term immobile carbon stocks greenhouse gases (GHGs) dioxide (CO 2 ) and methane (CH 4 to atmosphere, but how much, at which time‐span gaseous species is still highly uncertain. Here we assess effect permafrost on GHG dynamics under different moisture vegetation scenarios a peatland. A novel experimental approach using intact plant–soil systems...
Paddies contain 78% higher organic carbon (C) stocks than adjacent upland soils, and iron (Fe) plaque formation on rice roots is one of the mechanisms that traps C. The process sequence, extent global relevance this C stabilization mechanism under oxic/anoxic conditions remains unclear. We quantified localized contribution Fe to matter in a microoxic area (rice rhizosphere) evaluated roles trap for sequestration paddy soils. Visualization localization pH by imaging with planar optodes,...
Abstract. Plant-mediated methane (CH4) transport and the contribution of recent photosynthates to methanogenesis were studied on two dominating vascular plant species – Eriophorum vaginatum Scheuchzeria palustris at three types microrelief forms (hummocks E. hummocks, lawns hollows S. hollows) a boreal natural minerogenic, oligotrophic fen in Eastern Finland. 14C-pulse labeling mesocosms with shoots isolated from entire belowground peat under controlled conditions allowed estimation...
Increased root exudation under elevated atmospheric CO 2 and the contrasting environments in soil macro- microaggregates could affect microbial growth strategies. We investigated effect of on contribution fast- ( r -strategists) slow-growing K microorganisms microaggregates. fractionated bulk from ambient (for 5 years) treatments FACE-Hohenheim (Stuttgart) into large (>2 mm), small (0.25–2.00 (<0.25 mm) using ‘optimal moist’ sieving. Microbial biomass (C mic ), maximum specific rate (μ),...
The global methane (CH4 ) budget is based on a sensitive balance between methanogenesis and CH4 oxidation (aerobic anaerobic). response of these processes to climate warming, however, not quantified. This largely reflects our lack knowledge about the temperature sensitivity (Q10 anaerobic (AOM)-a ubiquitous process in soils. Based 13 labeling experiment, we determined rate, Q10 activation energy AOM paddy soil at three temperatures (5, 20, 35°C). rates increased exponentially with...