Table 3 - uploaded by Javier Carmona Jiménez
Content may be subject to copyright.
Minerals deposited on B. ganeshii sheaths from sites 1 through 4 of rivers of the central portion of Mexico. Values are expressed as percentage of total minerals present.

Minerals deposited on B. ganeshii sheaths from sites 1 through 4 of rivers of the central portion of Mexico. Values are expressed as percentage of total minerals present.

Source publication
Article
Full-text available
Geochemical, mineralogical and microbiological data from four freshwater streams in central region of Mexico indicate the importance of Blennothrix ganeshii mats (Cyanobacteria, Oscillatoriales) in promoting the formation of calcium carbonate crystals. The streams were characterized by alkaline waters and relative physicochemical stability during t...

Context in source publication

Context 1
... the sheaths, the calcite coating was enlarged (up to five times the di- ameter of the trichome) mainly by the addition of calcite crystals, which grouped themselves in cylindrical tubes (Fig. 4F). X-ray diffraction showed a high number of minerals (car- bonates, silicates and oxides) deposited on B. ganeshii sheaths (Table 3). XRD analyses indicated that calcite was the only phase of CaCO 3 present in readily detectable amounts at all sites. ...

Similar publications

Article
Full-text available
A comprehensive research of water and cyanobacterial mats in Mogoysky and Shurindinsky thermal springs (Baikal rift zone) was carried out by hydrochemical, chemical, microbiological, and mineralogical methods. Detailed descriptions of the springs location and their characteristics were given. According to their chemical composition, the springs wer...
Article
Full-text available
Siliceous, opal-A speleothems of the Chimalacatepec lava tube system in central Mexico are characterized here for the first time. Morphologically, they can be classified into cylindrical and planar, and display a wide array of shapes, inner textures, and locations within the lava tube. All speleothems analyzed here are composed of opal-A, and their...
Article
Full-text available
Geochemical, mineralogical and microbiological data from four freshwater streams in central region of Mexico indicate the importance of Blennothrix ganeshii mats (Cyanobacteria, Oscillatoriales) in promoting the formation of calcium carbonate crystals. The streams were characterized by alkaline waters and relative physicochemical stability during t...

Citations

... In fact, the C sequestration function of phytoplankton is also related to phytoplankton species, such as diatoms and cyanobacteria. Diatoms composed of silicon dioxide (SiO 2 ) rapidly sink to the water bed (Ardiles et al., 2012) while cyanobacteria form calcium carbonate (CaCO 3 ) sediment through biocalcification, which forms a C pool in freshwater sediment layers (Beltrán-Magos et al., 2013;Li et al., 2017b). ...
Article
Inland water carbon (C) sequestration rates play a potentially important role in the balance between C supplies from the atmosphere and associated watersheds and the net demand of primary producers. This study conducts a comprehensive analysis of influencing factors associated with inland water C cycling processes as well as their C sequestration potential and gross primary productivity (GPP). Additionally, we also analyze changes in the balance between C sequestration processes and GPP. Furthermore, this study describes applicable research methods used to quantify C cycling and GPP processes as well as providing corresponding estimates on regional and global scales. Finally, we offer a scientific basis to chronicle how inland water productivity controls exogenous C inputs as well as changes to biological, physical, and chemical factors. Investigations into inland water C sequestration processes under a background of climate warming will become more critical in the future, necessitating the inclusion of different aquatic system component classifications and plant species community types to determine the effects associated with GPP and C dynamic mechanisms within aquatic systems that constitute this diverse water system.
... La excepción a lo anterior ocurre con Homoeothrix juliana-Heteroleibleinia fontana, las cuales formaron costras en zonas abiertas con valores altos de PAR. Los iones presentes sobre las vainas de sus filamentos pueden ser un mecanismo de protección contra la luz ultravioleta (Beltrán-Magos et al., 2013). ...
Article
Full-text available
Antecedentes y Objetivos: Las cianobacterias son algas procariontes oxifotótrofas presentes en gran variedad de hábitats y son componentes importantes de las comunidades bentónicas en muchos ambientes continentales y marinos. En México su diversidad en ríos es poco conocida; por ello, este estudio contribuye al conocimiento ficoflorístico en cinco ríos de la región central de México. Se incluyen descripciones e ilustraciones, estimaciones de su diversidad, un análisis de las relaciones entre formas de crecimiento y factores microambientales, y se discute la validez de su caracterización morfológica y ecológica en la delimitación de las especies encontradas. Métodos: Se realizaron muestreos en secas y lluvias en dos ríos silíceos y tres ríos calcáreos del centro de México. Se registró la temperatura del agua, conductividad específica y pH, se analizaron iones mayores (Ca²⁺, Mg²⁺, K⁺, Na⁺, Si-SiO2, HCO3 ⁻, Cl⁻, SO4 ³⁻) y nutrientes (NH4 ⁺, NO2 ⁻, NO3 ²⁻, PO4 ³⁻), se estimó la diversidad de las cianobacterias registradas con el índice de Shannon-Weaver y se describieron sus hábitats y microhábitats. La identificación taxonómica se realizó utilizando literatura especializada. Resultados clave: Se identificaron cuatro asociaciones y nueve especies pertenecientes a tres órdenes, siete familias y siete géneros. Se distinguieron dos grupos: el formado por Nostoc parmelioides-Coleodesmium wrangelii y Phormidium lividum-Leptolyngbya truncata en ríos silíceos de montaña y el compuesto por Schizothrix mexicana-Phormidium subfuscum, Homoeothrix juliana-Heteroleibleinia fontana y Nostoc verrucosum en ríos calcáreos cálidos. Se reconocieron dos patrones de distribución ecológica: 1) las especies del orden Nostocales presentes en condiciones estresantes de luz y velocidad de corriente y 2) los taxa de los órdenes Oscillatoriales y Synechococcales registrados en sitios con valores promedio de luz y flujo de agua. Conclusiones: La caracterización morfológica y ecológica de especies de cianobacterias contribuye a su conocimiento ficoflorístico y es la base para futuras investigaciones sobre taxonomía, sistemática y uso sustentable de recursos algales.
... The biologically induced mineralization (BIM) occurs through various metabolic processes, such as photosynthetic uptake of CO 2 and/or HCO 3 by cyanobacteria, as well as ammonification, denitrification and sulfate reduction by other bacteria (Riding 2000;Beltrán-Magos et al. 2013). Especially for cyanobacteria, the following processes are known to contribute to the construction of carbonates: (a) increase of pH due to photosynthesis, (b) trap of CaCO 3 grains by entangled filaments, (c) biogenic activity of some cyanobacterial species (e.g., Rivularia haematites) to secrete carbonate structures and (d) binding of CaCO 3 grains in extracellular polymeric substances (EPS). ...
... EPS constitute a protective and adhesive material that anchors cells, colonies and filaments to the substrate, favoring sediment trapping. EPS possess the ability to concentrate Ca 2? cations favouring calcium carbonate encrustation by providing an ideal surface for adsorption of ions and mineral nucleation (Braissant et al. 2003;Beltrán-Magos et al. 2013). Furthermore, it is known that minerals originated through BIM nucleate and grow both extracellularly and also intracellularly. ...
... Over the rim and on the steep outside wall of the terrace (dam), water flows in a thin sheet resulting in the increase of the flow velocity. Morphological classification schemes for travertine terrace have been proposed by several authors (Bargar 1978;Bates and Jackson 1987;Pentecost and Viles 1994;Fouke et al. 2000). Using the classification suggested by Bargar (1978) and Fouke et al. (2000) in Thermopylae ''microterracettes'' of a few square centimeters or less, with maxima height of dams up to 10 mm, were identified (Fig. 2c, d). ...
Article
The present paper deals with the investigation of abiotic and biotic influence on thermogenic travertine formation in Thermopylae hot springs, one of the largest active thermogenic travertine systems in Greece. Geological, mineralogical and microbiological data from three different types of travertines (cascades, terraces and fluvial crusts) revealed different cyanobacterial communities. Microscopic analysis of fresh and cultured material has shown that epilithic and endolithic cyanobacteria are almost the exclusive components of travertines’ photosynthetic microflora. Thirty-one (31) taxa of cyanobacteria are presented here, among them the frequently found, in such environments, Phormidium incrustatum and Aphanocapsa thermalis, as well as the taxonomically interesting diazotrophic morphotype identified as Chlorogloeopsis sp. Sampling sites I and II have similar formation conditions characterized by laminated travertines with low porosity and shrub lithotypes, with the cyanobacterium Leptolyngbya ercegovicii occupying an endolithic zone, while the upper part is occupied by colonial chroococcalean species. On the contrary, sampling site III is characterized by laminated travertine with fenestrial type porosity and absence of shrub lithotypes resulting in a completely different community of cyanobacteria.
... The biologically induced mineralization (BIM) occurs through various metabolic processes, such as photosynthetic uptake of CO 2 and/or HCO 3 by cyanobacteria, as well as ammonification, denitrification and sulfate reduction by other bacteria (Riding 2000;Beltrán-Magos et al. 2013). Especially for cyanobacteria, the following processes are known to contribute to the construction of carbonates: (a) increase of pH due to photosynthesis, (b) trap of CaCO 3 grains by entangled filaments, (c) biogenic activity of some cyanobacterial species (e.g., Rivularia haematites) to secrete carbonate structures and (d) binding of CaCO 3 grains in extracellular polymeric substances (EPS). ...
... EPS constitute a protective and adhesive material that anchors cells, colonies and filaments to the substrate, favoring sediment trapping. EPS possess the ability to concentrate Ca 2? cations favouring calcium carbonate encrustation by providing an ideal surface for adsorption of ions and mineral nucleation (Braissant et al. 2003;Beltrán-Magos et al. 2013). Furthermore, it is known that minerals originated through BIM nucleate and grow both extracellularly and also intracellularly. ...
... Over the rim and on the steep outside wall of the terrace (dam), water flows in a thin sheet resulting in the increase of the flow velocity. Morphological classification schemes for travertine terrace have been proposed by several authors (Bargar 1978;Bates and Jackson 1987;Pentecost and Viles 1994;Fouke et al. 2000). Using the classification suggested by Bargar (1978) and Fouke et al. (2000) in Thermopylae ''microterracettes'' of a few square centimeters or less, with maxima height of dams up to 10 mm, were identified (Fig. 2c, d). ...
... Overall, our results imply that the metabolic influence of psychrophilic diatoms may be particularly important for promoting formation and dissolution of travertine in extremely cold environments of Huanglong. The EPS of psychrophilic diatoms will protect travertine from HCO 3 − etching and provide template for forming travertine when water re-flowing, in warm season. ...
... Travertine is a form of carbonate deposit in mineral springs [1,2]. Evidence obtained from previous laboratory and field-based experiments suggests that bacteria (particularly, cyanobacteria), algae, fungi, and bryophytes play significant roles in carbonate deposition and contribute to the formation of microbial biofilms and mats [3][4][5][6]. In the geological record, microbial carbonates are found most extensively in marine, lacustrine, spring, cave, and soil environments [3], where microbial cells may participate in the process of carbonate deposition via cell surface interactions. ...
... Evidence obtained from previous laboratory and field-based experiments suggests that bacteria (particularly, cyanobacteria), algae, fungi, and bryophytes play significant roles in carbonate deposition and contribute to the formation of microbial biofilms and mats [3][4][5][6]. In the geological record, microbial carbonates are found most extensively in marine, lacustrine, spring, cave, and soil environments [3], where microbial cells may participate in the process of carbonate deposition via cell surface interactions. Deposition can also be mediated metabolically by the secretion of extracellular polysaccharide substances, also known as EPS, which act as preferential sites for nucleation and localized templates that force mineralization on the surface of the EPS matrix or as inhibitors of carbonate formation depending on intrinsic conditions [4,[7][8][9]. ...
Article
Full-text available
Diatoms are a highly diversified group of algae that are widely distributed in aquatic ecosystems, and various species have different nutrient and temperature requirements for optimal growth. Here, we describe unusual psychrophilic diatoms of Cymbella in a travertine deposition environment in southwestern China in winter season. Travertine surfaces are colonized by these psychrophilic diatoms, which form biofilms of extracellular polysaccharide substances (EPS) with active metabolic activities in extremely cold conditions. The travertine in Huanglong, is a typical single crystalline calcite with anisotropic lattice distortions of unit cell parameters along axes of a and c, and this structure is suggestive of some level of metabolic mediation on mineralization. Near-edge X-ray absorption fine structure spectroscopy (NEXAFS) results further confirmed the occurrence of biogenic distortion of the crystal lattice of travertine calcite. Overall, our results imply that the metabolic influence of psychrophilic diatoms may be particularly important for promoting formation and dissolution of travertine in extremely cold environments of Huanglong. The EPS of psychrophilic diatoms will protect travertine from HCO3- etching and provide template for forming travertine when water re-flowing, in warm season.