A5007474995- Soil Carbon and Nitrogen Dynamics
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Soil and Unsaturated Flow
- Microbial Community Ecology and Physiology
- Polar Research and Ecology
- Methane Hydrates and Related Phenomena
- Mycorrhizal Fungi and Plant Interactions
- Clay minerals and soil interactions
- Soil Geostatistics and Mapping
- Biocrusts and Microbial Ecology
- Iron oxide chemistry and applications
- Plant nutrient uptake and metabolism
- Radioactive element chemistry and processing
- Cryospheric studies and observations
- Indigenous Studies and Ecology
- Geochemistry and Elemental Analysis
- Forest Ecology and Biodiversity Studies
- Ecology and Vegetation Dynamics Studies
- Heavy metals in environment
- Legume Nitrogen Fixing Symbiosis
- Lichen and fungal ecology
- Geological Studies and Exploration
University of Copenhagen
2020-2025
Technische Universität Berlin
2023-2025
Technical University of Munich
2015-2024
Geocenter Denmark
2020-2024
IT University of Copenhagen
2021
University of Tübingen
2021
Weihenstephan-Triesdorf University of Applied Sciences
2017-2021
ORCID
2021
Leibniz-Institute for Food Systems Biology at the Technical University of Munich
2020
The University of Queensland
2019
Abstract The largest terrestrial organic carbon pool, in soils, is regulated by an intricate connection between plant inputs, microbial activity, and the soil matrix. This manifested how microorganisms, key players transforming plant-derived into carbon, are controlled physical arrangement of inorganic particles. Here we conduct incubation isotopically labelled litter to study effects structure on fate litter-derived matter. While activity fungal growth enhanced coarser-textured soil, show...
The sequestration of carbon and nitrogen by clay-sized particles in soils is well established, clay content or mineral surface area has been used to estimate the potential soils. Here, via incubation a sieved (<2 mm) topsoil with labelled litter, we find that only some surfaces bind organic matter (OM). Surprisingly, <19% visible areas show an OM attachment. preferentially associated organo-mineral clusters rough surfaces. By combining nano-scale secondary ion mass spectrometry isotopic...
Subsoils are known to harbor large amounts of soil organic carbon (SOC) and may represent key global (C) sinks given appropriate management. Although rhizodeposition is a major input pathway matter subsoils, little knowledge exists on C dynamics, particularly stabilization mechanisms, such as aggregation, in the rhizosphere different depths. The aim this study was investigate influence natural elevated root exudation allocation aggregation topsoil subsoil mature European beech (Fagus...
Abstract It has been shown that reactive soil minerals, specifically iron(III) (oxyhydr)oxides, can trap organic carbon in soils overlying intact permafrost, and may limit mobilization degradation as it is observed other environments. However, the use of iron(III)-bearing minerals terminal electron acceptors permafrost environments, thus their stability capacity to prevent during thaw, poorly understood. We have followed dynamic interactions between iron using a space-for-time approach...
Abstract Understanding the cycling of C and N in soils is important for maintaining soil fertility while also decreasing greenhouse gas emissions, but much remains unknown about how organic matter ( OM ) stabilized soils. We used nano‐scale secondary ion mass spectrometry (Nano SIMS to investigate changes a Vertisol an Alfisol incubated 365 days with 13 15 pulse labeled lucerne Medicago sativa L.) discriminate new inputs from existing . found that almost all within free stable...
Abstract Nitrogen availability often restricts primary productivity in terrestrial ecosystems. Arbuscular mycorrhizal fungi are ubiquitous symbionts of plants and can improve plant nitrogen acquisition, but have a limited ability to access organic nitrogen. Although other soil biota mineralize into bioavailable forms, they may simultaneously compete for nitrogen, with unknown consequences nutrition. Here, we show that synergies between the fungus Rhizophagus irregularis microbial communities...
Not only do soils provide 98.7% of the calories consumed by humans, they also numerous other functions upon which planetary survivability closely depends. However, our continuously increasing focus on for biomass provision (food, fiber, and energy) through intensive agriculture is rapidly degrading diminishing their capacity to deliver vital functions. These tradeoffs in soil functionality – increased one function at expense critical are this review. We examine how land-use change has...
Abstract Increased human‐derived nitrogen (N) loading in terrestrial ecosystems has caused widespread ecosystem‐level phosphorus (P) limitation. In response, plants and soil micro‐organisms adopt a series of P‐acquisition strategies to offset N loading‐induced P Many these impose costs on carbon (C) allocation by micro‐organisms; however, it remains unclear how affect C cycling. Herein, we review the literature effects limitation outline conceptual overview plant microbial may organic (SOC)...
Abstract Soil carbon sequestration arises from the interplay of input and stabilization, which vary in space time. Assessing resulting microscale distribution an intact pore space, however, has so far eluded methodological accessibility. Here, we explore role soil moisture regimes shaping gradients by a novel mapping protocol for particulate organic matter matrix based on combination Osmium staining, X-ray computed tomography, machine learning. With three different types show that regime...
Abstract Correlations between organic carbon (OC) and fine mineral particles corroborate the important role of abundance soil minerals with reactive surfaces to bind increase persistence matter (OM). The storage OM broadly consists particulate mineral-associated forms. Correlative studies on impact mostly combined data from differing sites potentially confounded by other environmental factors. Here, we analyzed in a clay content gradient 5–37% similar farm management composition. Throughout...
Roots and the associated soil directly affected by root activity, termed rhizosphere, have both been extensively studied recognized for their crucial role in functioning. The formation of rhizosphere is primarily driven effect roots on shaping physical structure soil, which turn has direct feedbacks interactions between physical, biological chemical processes. As a result, hot spot microbial cycling nutrients turnover organic matter. Despite pivotal controlling processes, we still lack...
Abstract Emerging evidence points out that the responses of soil organic carbon (SOC) to nitrogen (N) addition differ along profile, highlighting importance synthesizing results from different layers. Here, using a global meta‐analysis, we found N significantly enhanced topsoil (0–30 cm) SOC by 3.7% (±1.4%) in forests and grasslands. In contrast, subsoil (30–100 initially increased with but decreased over time. The model selection analysis revealed experimental duration vegetation type are...
Rising atmospheric CO2 concentrations have increased interest in the potential for forest ecosystems and soils to act as carbon (C) sinks. While soil organic C contents often vary with tree species identity, little is known about if, how, influence stability of soil. Using a 40 year old common garden experiment replicated plots eleven temperate species, we investigated relationships between matter (SOM) mineral 17 ecological factors (including tissue chemistry, magnitude inputs their...
Spatial inaccessibility of soil organic carbon (SOC) for microbial decay within aggregates is an important stabilization mechanism. However, little known about the stability in semiarid grasslands and their sensitivity to intensive grazing. In this study, a combined approach using chemical physical analytical methods was applied investigate effect grazing exclusion on amount associated protection SOC. Topsoils from continuously grazed (CG) ungrazed sites where excluded 1979 onwards (UG79)...
Abstract Permafrost‐affected soils of the northern circumpolar region represent 50% terrestrial soil organic carbon ( SOC ) reservoir and are most strongly affected by climatic change. There is growing concern that this vast pool could transition from a net C sink to source. But so far little known on how matter OM in permafrost will respond warming future, which governed composition possible stabilization mechanisms. To investigate if active layer adjacent protected against degradation, we...