A variety of environmental processes, including topography, edaphic and disturbance factors can influence vegetation composition. The relative influence of these patterns has been known to vary with scale, however, few studies have focused on environmental drivers of composition at the mesoscale. This study examined the relative importance of topography, catchment flow and soil in influencing t...

Nitrogen oxide biogenic emissions from soils are driven by soil and environmental parameters. The relationship between these parameters and NO fluxes is highly non linear. A new algorithm, based on a neural network calculation, is used to reproduce the NO biogenic emissions linked to precipitations in the Sahel on the 6 August 2006 during the AMMA campaign. This algorithm has been coupled in th...

Article history: Soil organic matter dynami Received 6 May 2008 Received in revised form 19 November 2008 Accepted 3 February 2009 Available online 18 March 2009

Inorganic Chemistry of As and Se in Soil Solution .......................................... 66 Methylation and Volatilization Reactions ......................................................... 66 Precipitation-Dissolution Reactions .................................................................. 68 Oxidation-Reduction Reactions ..................................................................

1 Institute for Environmental Analytical Chemistry, University of Duisburg-Essen, Germany * now at: Soil Geography/Pedology, Department of Geography, University of Cologne, Germany Received: 26 February 2008 – Accepted: 26 February 2008 – Published: 4 April 2008 Correspondence to: L. Duester ([email protected]) Published by Copernicus Publications on behalf of the European Geosciences U...

The newest results in the use of various extraction techniques and chromatographic methods such as gas-liquid and high-performance liquid chromatography used for the assessment of herbicide residues in various matrices have been compiled and critically evaluated. Practical employments in water and soil research, environmental protection, clinical and food chemistry are presented.

The laboratory component of a first-semester general chemistry course for science majors is described. The laboratory involves a semester-long project undertaken in a small-group format. Students are asked to examine whether plants grown in soil contaminated with lead take up more lead than those grown in uncontaminated soil. They are also asked to examine whether the acidity of the rainwater a...

Although understanding of nitrogen cycling and nitrification in forest ecosystems has improved greatly over the past several decades, our ability to characterize spatial patterns is still quite limited. A number of studies have shown linkages between canopy chemistry and N cycling, but few have considered the degree to which these trends can provide an indicator of forest N status across large,...

1Institute of Ecological Chemistry 2Institute of Soil Ecology, Rhizosphere Biology Group, GSF – National Research Center for Environment and Health, Neuherberg, Germany 3Lehrstuhl für Mikrobiologie 4Lehrstuhl für Ökologische Chemie und Umweltanalytik, Technische Universität München, Freising/Weihenstephan, Germany Analysis ofN-acyl-L-homoserine lactones produced by Burkholderia cepaciawith part...