Facing Phototrophic Microorganisms That Colonize Artistic Fountains and Other Wet Stone Surfaces: Identification Keys Bolívar Galiano, Fernando Carlos Abad Ruiz, Clara Sánchez Castillo, Pedro Miguel Green algae Diatoms Cyanobacteria Microalgae Stone conservation Diagnosis tool Preservation strategies Biodeterioration This research was funded by the GOVERNMENT OF ANDALUSIA AND EUROPEAN REGIONAL DEVELOPMENT FUND, grant number A-HUM-279-UGR18 and P18-FR-4477 (FICOARTE regional project), and by the SPANISH MINISTRY OF ECONOMY AND COMPETITIVENESS, grant number PID2019.109713RB.100 (VIRARTE national project). All fountains are inhabited by phototrophic microorganisms, especially if they are functional and located outdoors. This fact, along with the regular presence of water and the intrinsic bioreceptivity of stone material, easily favors the biological development. Many of these organisms are responsible for the biodeterioration phenomena and recognizing them could help to define the best strategies for the conservation and maintenance of monumental fountains. The presence of biological growth involves different activities for the conservation of artistic fountains. This paper is a review of the phototrophic biodiversity reported in 46 fountains and gives a whole vision on coping with biodeteriogens of fountains, being an elementary guide for professionals in the field of stone conservation. It is focused on recognizing the main phototrophs by using simplified dichotomous keys for cyanobacteria, green algae and diatoms. Some basic issues related to the handling of the samples and with the control of these types of microalgae are also briefly described, in order to assist interested professionals when dealing with the biodiversity of monumental fountains. 2021-10-25T06:35:36Z 2021-10-25T06:35:36Z 2021-09-21 info:eu-repo/semantics/article Bolivar-Galiano, F... [et al.]. Facing Phototrophic Microorganisms That Colonize Artistic Fountains and Other Wet Stone Surfaces: Identification Keys. Appl. Sci. 2021, 11, 8787. [https://doi.org/10.3390/app11188787] http://hdl.handle.net/10481/71059 10.3390/app11188787 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI