Biogeochemical Cycling of Nutrients and Thermodynamic Aspects

Marine biogeochemical cycling of mercury.

Biogeochemical Cycling of Micronutrients and Other Elements

Biogeochemical Processes and Implications for Nutrient Cycling

The availability and cycling of nutrients is determined by an interaction of physical, chemical, and biological processes in an ecosystem. This interaction of processes, collectively known as biogeochemistry, is important as it determines the forms, transformations, and ultimate fate of nutrients in a given system. This chapter focuses on biogeochemical processes in springs and spring runs with...

Isotopic Constraints on Biogeochemical Cycling of Fe

INTRODUCTION Cycling of redox-sensitive elements such as Fe is affected by not only ambient Eh-pH conditions, but also by a signifi cant biomass that may derive energy through changes in redox state (e. The evidence now seems overwhelming that biological processing of redox-sensitive metals is likely to be the rule in surface-and near-surface environments, rather than the exception. The Fe redo...

Introduction to the Biogeochemical Cycling of Arsenic

Although arsenic is highly toxic to humans, and indeed most other forms of life, some microorganisms have evolved to tolerate relatively high concentrations of the metalloid, while specialist examples even thrive on the element, using it as a source of energy for growth. This surprising array of microbial processes, together with inorganic and physical processes, constitutes the global arsenic ...