Mechanical deterioration of building stones by cyanobacteria and algae

The weathering of building stone is a natural process in which physical, chemical and biological agents are involved, similar to soil formation. Among the biological agents the atmophytic cyanobacleria and algae are primary colonizers due to their phototrophism and low nutrient requirements. Their presence on and in the stone may represent a contribution to its microbial deterioration.

3 pages, 1 figure, 1 reference.-- La monografía citada se publica con motivo del Symposium celebrado del 26-31, agosto, 1990, en Ontario, Canadá.

This research has been supported by the CEC through contract EV4E 0061 E and CICYT, Spain.

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