A5043396232- Soil Carbon and Nitrogen Dynamics
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Isotope Analysis in Ecology
- Plant Water Relations and Carbon Dynamics
- Microbial Community Ecology and Physiology
- Plant responses to elevated CO2
- Fire effects on ecosystems
- Soil and Water Nutrient Dynamics
- Hydrocarbon exploration and reservoir analysis
- Coastal wetland ecosystem dynamics
- Metabolomics and Mass Spectrometry Studies
- Botany and Plant Ecology Studies
- Tree Root and Stability Studies
- Soil erosion and sediment transport
- Archaeology and ancient environmental studies
- Plant nutrient uptake and metabolism
- Plant Ecology and Soil Science
- Toxic Organic Pollutants Impact
- Forest Ecology and Biodiversity Studies
- Tree-ring climate responses
- Methane Hydrates and Related Phenomena
- Bioenergy crop production and management
- Ecology and Vegetation Dynamics Studies
- Soil and Unsaturated Flow
University of Zurich
2016-2025
University of Bayreuth
2007-2017
University of Cologne
2004-2009
Leibniz University Hannover
2004
Abstract Traditionally, the selective preservation of certain recalcitrant organic compounds and formation humic substances have been regarded as an important mechanism for soil matter (SOM) stabilization. Based on a critical overview available methods results from cooperative research program, this paper evaluates how relevant recalcitrance is long‐term stabilization SOM or its fractions. Methodologically, difficult to assess, since persistence fractions specific may also be caused by other...
Abstract. Seit einigen Jahren gibt es zunehmend Studien, die, basierend auf der Untersuchung von fossilen Holzkohlen und Schneckenschalen aus Löss-Paläoboden Sequenzen, die traditionelle Vorstellung weitestgehend baumlosen Steppen im Karpaten-Becken während letzten Kaltzeit in Frage stellen. Mit unseren Arbeiten versuchen wir anhand Biomarkern einen Beitrag zu dieser Diskussion leisten herauszufinden, welches Potenzial Alkan für Rekonstruktion Vegetationsgeschichte glazialen Zyklen steckt....
Abstract. Branched Glycerol Dialkyl Tetraethers (GDGTs) are membrane spanning lipids synthesised by as yet unknown bacteria that thrive in soils and peat. In order to obtain more information on their ecological niche, the stable carbon isotopic composition of branched GDGT-derived alkanes, obtained upon ether bond cleavage, has been determined a peat various soils, i.e. forest, grassland cropland, covered vegetation types, i.e., C3- vs. C4-plant type. These δ13C values compared with those...
Abstract. The application of lipids in soils as molecular proxies, also often referred to biomarkers, has dramatically increased the last decades. Applications range from inferring changes past vegetation composition, climate, and/or human presence unraveling input and turnover soil organic matter (SOM). molecules used are extractable non-extractable lipids, including ester-bound lipids. In addition, carbon or hydrogen isotopic composition such is used. While holding great promise, proxies...
Increasing global temperatures have the potential to stimulate decomposition and alter composition of soil organic matter (SOM). However, questions remain about extent which SOM quality quantity along profile may change under future warming. In this study we assessed how +4 °C whole-soil warming affected down 90 cm depth in a mixed-coniferous temperate forest using biomarker analyses. Our findings indicate that 4.5 years led divergent responses subsoils (>20 cm) as compared surface soils....
Subsoils contain more than half of soil organic carbon (SOC) and are expected to experience rapid warming in the coming decades. Yet our understanding stability this vast pool under global is uncertain. In particular, fate complex molecular structures (polymers) remains debated. Here we show that 4.5 years whole-soil (+4 °C) resulted less polymeric SOC (sum specific polymers contributing SOC) warmed subsoil (20-90 cm) relative control, with no detectable change topsoil. Warming stimulated...
Abstract Peatlands are an important carbon (C) reservoir storing one-third of global soil organic (SOC), but little is known about the fate these C stocks under climate change. Here, we examine impact warming and elevated atmospheric CO 2 concentration (eCO ) on molecular composition SOC to infer sources (microbe-, plant- fire-derived) stability in a boreal peatland. We show that while alone decreased microbe-derived due enhanced decomposition, combined with eCO increased plant-derived...
Abstract Quantitative information about the amount and stability of organic carbon (OC) in different soil organic‐matter (OM) fractions specific compounds compound‐classes is needed to improve our understanding sequestration soils. In present paper, we summarize integrate results performed on two arable soils with continuous maize cropping (a) Stagnic Luvisol for 24 y, b) Luvic Phaeozem 39 y) identify (1) storage OC fractions, (2) function these respect soil‐OC stabilization, (3) importance...
The hydrogen isotopic composition (δ