A5043387697- Building materials and conservation
- Biocrusts and Microbial Ecology
- Diatoms and Algae Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Algal biology and biofuel production
- Microbial Community Ecology and Physiology
- Lichen and fungal ecology
- Conservation Techniques and Studies
- Protist diversity and phylogeny
- Constructed Wetlands for Wastewater Treatment
- Maritime and Coastal Archaeology
- Mediterranean and Iberian flora and fauna
- Subterranean biodiversity and taxonomy
- 3D Surveying and Cultural Heritage
- Slime Mold and Myxomycetes Research
- Marine Biology and Ecology Research
- Paleontology and Stratigraphy of Fossils
- Marine and coastal ecosystems
- Cultural Heritage Materials Analysis
- Geochemistry and Elemental Analysis
- Wastewater Treatment and Reuse
- Methane Hydrates and Related Phenomena
- Karst Systems and Hydrogeology
- Hydrocarbon exploration and reservoir analysis
- Water Quality and Pollution Assessment
Universitat de Barcelona
2007-2022
Institut Botànic de Barcelona
1991-1999
Instituto de Recursos Naturales y Agrobiología de Sevilla
1997
Observatoire Océanologique de Banyuls-sur-Mer
1995
Centre d’Investigació i Desenvolupament
1994
Centro de Investigación y Desarrollo
1994
The walls and ceiling of Altamira Cave, northern Spain, are coated with different coloured spots (yellow, white grey). Electron microscopy revealed that the grey composed bacteria bioinduced CaCO(3) crystals. morphology a dense network microorganisms organized in well-defined radial dendritic divergent branches from central area towards exterior spot, which is overlying spheroidal elements nest-like aggregates. Molecular analysis indicated were mainly formed by an unrecognized species genus...
Thirty‐four benthic diatom strains were isolated from thalassic hypersaline marine environments and their salinity tolerance characterized in growth experiments conducted at salinities ranging 0.5% to 17.5% (weight of total salts per volume, g·100 mL − 1 ). The results compared with the patterns species distribution abundance evaporation ponds tidal channels Guerrero Negro, Baja California Sur, Mexico. representative assemblages present saltern but less so natural channels. In general, we...
Caves with dim natural light, and lighted hypogean environments, have been found to host phototrophic microorganisms from various taxonomic groups. These group themselves into assemblies known as communities or biofilms, which are associated rock surfaces. In this work, the biofilms that colonise speleothems, walls floors in three tourist caves (Spain) were studied. Confocal laser scanning microscopy (CLSM) electron (SEM) used study these organisms acquire three-dimensional data on their...
Summary L ascaux C ave in F rance was discovered 1940. Since being opened to visitors the cave has suffered three major microbial outbreaks. The current problem is fast dissemination of black stains which are threatening P alaeolithic paintings. Previous data pointed involvement new fungal species formation on rock walls and ceiling. However, it appears that there could be other reasons for different extensive coating surface clayey sediments. Our analyses reveal sediments mainly produced by...
Surfaces of buildings at the archaeological site Palenque, Mexico, are colonized by cyanobacteria that form biofilms, which in turn cause aesthetic and structural damage. The characterization species composition biofilms from walls one these buildings, El Palacio, reported. distribution photosynthetic microorganisms their relationship with substratum, three-dimensional structure were studied image analysis. differences between local seasonal microenvironments Palenque site, bioreceptivity...
Caves have generally been found to host phototrophic micro-organisms from various taxonomic groups, with cyanobacteria comprising an important group that adapted these stable and highly specific environments. A polyphasic study based on aspects of classical morphology molecular data revealed two new monospecific genera fresh material Greek Spanish caves. Both taxa are characterized by obligatory true branching (T-type, V-type false branching), the presence heterocysts, reproduction...
In the last few years, geomicrobiologists have focused their researches on nature and origin of enigmatic reticulated filaments reported in modern fossil samples from limestone caves basalt lava tubes. Researchers posed questions these concerning nature, origin, chemistry, morphology, mode formation growth. A tentative microbial has been elusive since are found as hollow tubular sheaths could not be affiliated to any known microorganism. We describe presence similar structures a 16th century...
AbstractCalcifying cyanobacteria have colonized the tombs of Necropolis Carmona (Seville, SW Spain). Scytonema julianum (Frank) Richter was main colonizer cavities and able to thrive in most tombs, though differed considerably architecture exposure. grew on all surfaces not directly exposed air currents or long periods sunlight. The distribution Geitleria calcarea Friedmann more restricted; it found only one tomb, where coated nearly wall at dim end lighted zone. Calcification sheaths these...
Two strains were isolated from tuff, a volcanic rock that forms the walls of Roman Catacombs Saint Callixtus in Rome, Italy. A polyphasic approach using nutritional and physiological tests, reactions to antibiotics, fatty acid profiles, DNA base ratios, DNA-DNA reassociation 16S rRNA gene sequence comparisons showed two isolates belong novel species within genus Phyllobacterium. The Phyllobacterium catacumbae sp. nov. is proposed. type strain CSC19(T) (=CECT 5680(T)=LMG 22520(T)).
ABSTRACT A new imaging technique for the analysis of fluorescent pigments from a single cell is reported. It based on confocal scanning laser microscopy coupled with spectrofluorometric methods. The setup allows simultaneous establishment relationships among pigment in vivo, morphology, and three-dimensional localization inside thick intact microbial assemblages.
ABSTRACT Artificial illumination can harm works of art by inducing the development photosynthetic biofilms. With aim preventing biodeterioration or esthetic damage to such surfaces, we evaluated and compared effects illuminating biofilms formed Gloeothece membranacea (cyanobacteria) Chlorella sorokiniana (Chlorophyta) using exclusively white green light.
This work characterizes a unicellular cyanobacterium with nearly spherical cells and thin-outlined sheaths that divide irregularly, forming small packets immersed in diffluent mucilaginous layer. It was isolated growing on calcite speleothems walls show cave Collbató (Barcelona, Spain). Spectral confocal laser transmission electron microscopy were used to describe the morphology, fine structure thylakoid arrangement. The pigments identified phycoerythrin, phycocyanin, allophycocyanin...
An aerophytic Nostoc, from a Mayan monument, has been characterized by phenotypic and molecular approaches, identified as morphospecies of Nostoc commune.Phylogenetic analysis indicates that it belongs to sensu stricto clade, which contains strains N. commune.Nostoc cf.commune is found in two close areas: Site I (protected direct sunlight wall), where forms biofilms on mortar with Trentepohlia aurea; II, grows exposed stucco the accompanying organism Scytonema guyanense.Over year, habitat...
Electrical lighting favours the development of photosynthetic biofilms in caves which can induce biodeterioration colonized substrates. The use specific lights as a limiting factor for biofilm growth could be effective their control and represents an alternative to chemical methods since they damage substrate. However, studies about activity organisms are scarce. In order select most LED light source reducing photosynthesis therefore, rates microalgae cyanobacteria, four Nerja Cave were...