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Título

Interaction between Calcite and Phosphorus in Biomineralization Processes in Tufa Carbonates

AutorSouza-Egipsy, Virginia ; García del Cura, M. Ángeles ; Ascaso, Carmen ; Ríos, Asunción de los ; Wierzchos, Jacek ; González-Martín, J. A.
Palabras clavePhosphorus,
Cyanobacteria
Moss
Algae
Fecha de publicaciónmar-2006
EditorWiley-VCH
CitaciónInternational Review of Hydrobiolog 91(3): 222–241 (2006)
ResumenUsing electron microscopy techniques (SEM, LTSEM) coupled with analytical methods (XRD and EDS) the role of phosphorus has been assessed in the formation of freshwater calcite deposits (tufa) in a small pond of the Ruidera Lakes (Spain). Differences between the cell walls and sheaths of bacteria and eukaryotic algae as well as the existence of additional layers of extracellular polymeric substances (EPS) were features that lead to differences in the process of induced calcite biomineralization. Phosphorus has influence in the biomineralization of the EPS, sheaths and cell walls of cyanobacteria allowing for fossil preservation whereas does not participate in the calcite precipitation around algae and mosses. This variability may explain the different positive or negative roles played by natural or artificial inputs of phosphorus in hard water lakes and the different morphological features of calcite precipitates associated with eukaryotic and cyanobacteria picoplankton found in natural environments. The biomineralization observed is in agreement with the isotopic composition of the tufa layers that reflect the variations in environmental conditions around biological communities.
Descripción20 pages,7 figures, 6 tables
Versión del editorhttp://dx.doi.org/10.1002/iroh.200510845
URIhttp://hdl.handle.net/10261/18957
DOI10.1002/iroh.200510845
ISSN1434-2944
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