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17. Coupled phosphorus and iron cycling
17.1 The P- and Fe-cycles in sedimentary microbial ecosystems
- Concepts of microbial involvement in the iron and manganese redox cycles.
- Physiological consequences which follow from iron chemistry.
- Forms of sedimentary phosphorus.
- How anaerobic fermentation mediates the formation and dissolution of Fe/P-minerals.
17.2 Lake sediments: case studies
- Dynamics of microbial processes affecting P and Fe in sediments of a eutrophic lake:
seasonally fluctuating environmental conditions at sediment-water interfaces.
- How to derive information about fluxes and rates from measurements of states at
sediment-water interfaces.
- Ferric iron bound phosphorus: scanning EDX microscopy and chemical models for phosphorus
integration into ferric iron(oxy)hydroxides.
17.3 Constitutive activities and adaptation of ecosystems
- Transition shift experiments in laboratory microcosms.
- Microbiologically mediated electron flow in anoxic sediments: a model on microbially
mediated regulation of phosphorus release and retention.
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