thirteen environmental elements were distinguished in the livers of various species of fish thathave been sampled from 15 sites in a restricted area of the khorramabad river basin in lorestan province(west of iran). sites sampled represented agricultural, mining, mixed, and urban/recreation land uses andbackground conditions. lithium and silver were not detected at any of the sites. the minimum...

The article considers a non-stationary three-dimensional spatial mathematical model of biological kinetics and geochemical processes with nonlinear coefficients source functions. Often, the step analytical study in models this kind is skipped. purpose work to fill gap, which will allow for application numerical modeling methods biogeochemical cycles computational experiment that adequately refl...

This paper by Lawson and coworkers reports very interesting results with regard to low molecular weight DOC (LMW-DOC) speciation and abundance in basal ice from glaciers that have different organic and lithological substrates and thermal regimes. The case is made that these LMW-DOC compounds may support and/or be a product of biogeochemical activity beneath glaciers with consequence to regional...

Contributions in biogeochemical research have immensely benefited humankind, including enhanced food production and the quality of our environment. This overview paper focuses on recent breakthroughs in elucidating biogeochemical processes in soils and other natural materials and delineates frontiers for the present decade and beyond. Frontiers will undoubtedly involve multiple spatial and temp...

Deltas – landforms created where sediment is deposited at the mouth of a river – bury vast amounts of organic carbon, thereby playing a central role in the biogeochemical carbon and sulphur cycles (Fig. 1). Delta sediments are highly heterogeneous, varying over space and time, with important consequences for the interaction of sediments with biogeochemical processes. Understanding this complexi...