A5078175749- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Heavy metals in environment
- Soil and Unsaturated Flow
- Lichen and fungal ecology
- Botany and Plant Ecology Studies
- Hydrology and Watershed Management Studies
- Forest Ecology and Biodiversity Studies
- Forest ecology and management
- Plant Water Relations and Carbon Dynamics
- Clay minerals and soil interactions
- Mycorrhizal Fungi and Plant Interactions
- Groundwater and Isotope Geochemistry
- Mine drainage and remediation techniques
- Aluminum toxicity and tolerance in plants and animals
- Seedling growth and survival studies
- Soil erosion and sediment transport
- Fire effects on ecosystems
- Climate change and permafrost
- Mercury impact and mitigation studies
- Marine and coastal ecosystems
- Ecology, Conservation, and Geographical Studies
- Environmental Toxicology and Ecotoxicology
- Forest Management and Policy
University of Minnesota
2024
University of Bayreuth
2009-2018
University of Nevada, Reno
2013
Villanova University
2013
Technical University of Munich
2006
Kiel University
2004
Forest Research Institute
1996
University of Göttingen
1983-1993
Sands
1992
Norddeutsche Pflanzenzucht Hans-Georg Lembke (Germany)
1986
Abstract In the next decades, many soils will be subjected to increased drying/wetting cycles or modified water availability considering predicted global changes in precipitation and evapotranspiration. These may affect turnover of C N soils, but direction is still unclear. The aim review evaluation involved mechanisms, intensity, duration frequency drying wetting for mineralization fluxes terrestrial soils. Controversial study results require a reappraisal present understanding that dry...
The effects of nitrogen (N) deposition on plant litter and soil organic matter decomposition differ depending the stage (early, late, final stages). can be divided further into direct indirect ones. Direct effects: additions ammonium nitrate to fresh, newly shed stimulate initial celluloses solubles. By contrast, addition same compounds humus (final stages) clearly suppresses activity. This was seen in all studies reviewed for several types humus. Indirect long-term leads increases...
Abstract Based on recent findings in the literature, we developed a process‐oriented conceptual model that integrates all three process groups of organic matter (OM) stabilization soils namely (1) selective preservation recalcitrant compounds, (2) spatial inaccessibility to decomposer organisms, and (3) interactions OM with minerals metal ions. The concept relates diverse mechanisms active, intermediate, passive pools. formation pool is regarded as hierarchical structured co‐action various...
There is growing evidence of the importance extramatrical mycelium (EMM) mycorrhizal fungi in carbon (C) cycling ecosystems. However, our understanding has until recently been mainly based on laboratory experiments, and knowledge such basic parameters as variations mycelial production, standing biomass turnover well regulatory mechanisms behind forest soils limited. Presently, production EMM by ectomycorrhizal (EM) estimated at ~140 different sites to be up several hundreds kg per ha year,...
Abstract Phosphorus is one of the major limiting factors primary productivity in terrestrial ecosystems and, thus, P demand plants might be among most important drivers soil and ecosystem development. The cycling forest seems an ideal example to illustrate concept nutrition. Ecosystem nutrition combines extents traditional concepts nutrient ecology. extension consider also loading unloading cycles impact acquiring recycling processes on overall properties. aims integrate related aspects at...
Summary Dissolved organic nitrogen and carbon (DOC) are significant in the C N cycle terrestrial ecosystems. Little is known about their dynamics field factors regulating concentrations fluxes. We followed fluxes of two a Norway spruce ( Picea abies (L.) Karst.) forest ecosystem Germany from 1995 to 1997 by sampling at fortnightly intervals. Bulk precipitation, throughfall, floor percolates different horizons soil solutions depths were analysed for major ions, dissolved DOC. The largest...
Abstract With this topical issue, we present the work of Priority Program 1090 German Research Foundation (“Deutsche Forschungsgemeinschaft DFG”): “Soils as a source and sink for CO 2 – mechanisms regulation organic matter stabilisation in soils”. This introduction gives an overview on sites investigated major research approaches, including glossary terms used field soil research. We point out advantages integration data from broad different soil‐science disciplines progress achieved by...
Abstract. Concentrations of dissolved organic carbon (DOC) in runoff from catchments are often subject to substantial short-term variations. The aim this study was identify the compartmental sources DOC a forested catchment and causes for variations runoff. Furthermore, we investigated implication calculation annual fluxes. High frequency measurements (30 min intervals) runoff, discharge groundwater table were conducted one year 4.2 km2 Lehstenbach catchment, Germany. Riparian wetland soils...
The desiccation of upper soil horizons is a common phenomenon, leading to decrease in microbial activity and mineralization. Recent studies have shown that fungal communities fungal-based food webs are less sensitive better adapted than bacterial-based webs. One reason for adaptation may be hydraulic redistribution water by mycelia networks. Here we show saprotrophic fungus (Agaricus bisporus) redistributes from moist (-0.03 MPa) into dry (-9.5 at about 0.3 cm ⋅ min(-1) single hyphae,...
Although land‐water carbon (C) transport represents a critical link in the global C cycle, rare attempts have been made to compare hydrologic controls over storm pulses of dissolved organic (DOC) and particulate (POC) mountainous watersheds. An immersible UV/Vis spectrophotometer was used comparatively investigate rapid responses stream water DOC POC small forested watershed South Korea. High‐frequency measurements at 5‐min intervals during 42 events, including monsoon storms winter...
Abstract. Following the decline in sulphur deposition Europe, sulphate dynamics of catchments and reversibility anthropogenic acidification soils freshwaters became major interest. Long-term trends concentrations fluxes precipitation/throughfall 20 European were analysed to evaluate catchment response decreasing deposition. Sulphate studied declined by 38-82% during last decade. all decreased significantly, but reversal was clearly delayed German streams. In Scandinavian streams...