Microalgae associated with deteriorated stonework of the fountain of Bibatauin in Granada, Spain

The fountain of Bibatauin, in Granada (Spain), is in a poor state of conservation, and biodeterioration is occurring. Colonization by microalgae and its effects on the fountain were investigated. The microorganisms from representative sampling areas were identified by optical microscopy, and the biogenic carbonate crusts they formed analysed by X-ray diffraction and field emission scanning electronic microscopy. The most representative genera found were Cosmarium, Phormidium and Symploca, and the main mineral was calcite. (C) 2004 Elsevier Ltd. All rights reserved.