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Introduction
Research interest on continental algae.
Executive Editor of Cymbella.
Revista de investigación y difusión sobre algas. Sociedad Mexicana de Ficología.
New issue! 8(1).
Journal of Research and Communication on Algae of the Mexican Society of Phycology.
https://cymbella.fciencias.unam.mx/
Additional affiliations
January 2007 - present
January 1974 - present
Education
August 1985 - November 1998
Publications
Publications (84)
Ficoflorística de aguas continentales, ¿aquí y ahora? Dualidades que confrontan nuestro quehacer cotidiano. Publicado en línea noviembre 2024. Sociedad Mexicana de Ficología. www.somfico.org. Cymbella Revista de investigación y difusión sobre algas. La florística de aguas continentales parece ser una disciplina en vías de extinción. Aunque su impor...
Many readers have asked us for a glossary of the
main terms used in algal nomenclature.
Three primary sources have been consulted: the
first, and consistent with our contributions,
is the glossary of the Code (CIN) (Turland
et al. 2018), the second is the work of Hawksworth
(2010), which contains more than 2000 terms, the third
is Jeffrey (1973). A...
La florística de aguas continentales parece ser una disciplina en vías de extinción. Aunque su importancia y pertinencia es reconocida en el ambiente académico especializado las posiblidades de desarrollo son cada vez más difíciles. La necesidad de su mantenimiento como actividad científica no es reconocida por las instancias universitarias, académ...
Mentioning the authorities and years of publica-tion as part of the taxa mentioned in a publication seems to be a norm that the authors follow out of habit or due to the imposition of the editorial standards of publications. What is the meaning and importance of these, and the correct way to quote them? In this contribution and as a good practice,...
Background: The evolutionary pattern of dinophytes is complex and requires comprehensive taxonomic studies addressing the species' development and morphology, ecology, evolution, and genetics.
Questions: How recent was the transition of D. baltica from Mexico to freshwater based on a calibrated phylogeny tree of the Kryptoperidiniaceae?
Studied s...
La flora de algas en los lagos y arroyos de la Cantera Oriente de la Reserva Ecológica del Pedregal de San Ángel de la UNAM ha sido monitoreada durante 14 años. Se reunieron los registros semestrales de ese periodo contabilizando 270 taxones de 8 divisiones. El 87% de esa flora se ha presentado de 1 a 7 ocasiones y solo 15 especies se presentaron d...
Antecedentes.
Los Dinoflagelados (Dinoflagellata) se reconocen por los caracteres morfológicos de la cubierta celular específica llamada amphiesma. Este complejo ha presentado ventajas para la descripción de muchas especies; sin embargo, hay otras tantas cuya información morfológica básica es escasa o para la cual no se ha llegado a un consenso res...
RESUMEN Antecedentes. En 2011 publicamos un panorama de las algas dulceacuícolas mexicanas en esta revista. Objetivos. Once años después, hacemos una evaluación de los avances en cada uno de los temas relacio-nados con el conocimiento de los grupos algales continentales: número de especies registradas en el país y en cada estado de la república, ti...
RESUMEN
Los rangos taxonómicos, por debajo del nivel de especie, han sido utilizados desde el principio de la ficología para diferenciar discontinuidades o variaciones morfológicas, geográficas o ecológicas en las algas, con sus consecuencias en la taxonomía y la nomenclatura. En términos globales, el 30% de la diversidad algal mundial está compue...
En Tabasco se han reconocido 699 taxones algales dulceacuícolas, cifra que consideramos baja, dado que resguarda el mayor número de cuerpos de agua dulce del país y alberga la Reserva de la Biosfera Pantanos de Centla (RBPC), el humedal tropical más extenso, que por su compleja hidrología y biodiversidad es uno de los sitios más importantes de su t...
The knowledge, and proper and correct mention of the names assigned to taxa in a floristic study is perhaps the most important task at the beginning of any taxonomic work or in the analysis of a specific group. First, because it makes clear to readers, specialized or not, which circumscriptions they are using and the identities of their work units;...
This contribution is part of a series that aims to
disseminate good taxonomic practices among phycologists.
In this paper, we address the use of the
correct name, instead of the widespread practice of
using a valid name to cite taxonomically accepted
names. Some related concepts, present in the Code,
are mentioned, such as: the legitimate name, val...
The estimation of biodiversity has become, in these times, a pressing and fundamental task for the knowledge and conservation of the species that are in a given geographical space. This, based mainly on the very high rate of extinction of diverse organisms and the accelerated modification of different natural scenarios by humans. Even this task has...
In this work five biorefinery scenarios are proposed for the production of five different target products. Two of these scenarios included biodiesel production from Scenedesmus dimorphus microalgae biomass and glycerol valorization through bioconversion into dihydroxyacetone (DHA) with the bacteria Gluconobacter oxydans. Experimental data of microa...
In the last 20 years, the use of two abbreviations that were not common in the phycological literature has increased: aff. and cf. or cfr. These are as an alternative to the identification given the impossibility of assigning a specific or generic epithet to some individuals or representatives of a specific floristic study. The use of these abbrevi...
The rules for quoting the author of a scientific name are covered by the Code of Nomenclature of Algae, Mushrooms and Plants, in chapter VI, section 1, of Articles 46 to 50. However, one of the problematic cases, at least in the biological nomenclature is the use of the authors' initials in scientific names. C. Agardh, J. Agardh, W. West, G. S. Wes...
En el presente libro, se describe en detalle el axalapazco Alchichica, un cráter volcánico de casi dos kilómetros de diámetro que alberga un Iago de hasta sesenta metros de profundidad con aguas de color azul turquesa. En esta isla acuática se ha desarrollado una comunidad de organismos únicos en el mundo (microendémicos), protagonistas de la ecolo...
In the benthic diatoms of Lake Chalco species that respond to changes in nutrients, temperature and light predominate, and show significant ecological features to assess the disturbance caused by urban pressure, agricultural influence and overexploitation of the aquifer. In order to analyze the possible functionality of the aquatic environment, the...
It was possible to isolate and morphologically identify two microorganisms from the Bosque Azul lake, belonging to the Lagunas de Montebello National Park, a Pectinodesmus pectinatus microalgae and a cyanobacterium Limnothrix planctonica. There are reports of lipid accumulation in Pectinodesmus pectinatus that could be used for the production of bi...
Los cuerpos de agua del Parque Ecológico de Xochimilco (PEX) han venido cambiado notablemente, mostrando una marcada tendencia anual a la disminución del espejo de agua. Esta situación enfatiza la importancia de las diatomeas del Parque, principalmente los registros únicos y señala al área lacustre como una de las zonas que podrían estar severament...
The epilithic algae and cyanoprokaryotes that inhabit the Archaeological Zone of Yaxchilán, Chiapas, cover most of the walls of buildings; it is a site located in the Lacandon Jungle, next to the Usumacinta river with a very high relative humidity. The aim of this work was to document the species of algae and cyanoprokaryotes that grow on the archa...
The taxonomy of four isolated strains of Anabaenopis elenkinii and A. arnoldii from North and South America were investigated using a polyphasic approach. The studied populations were collected from seven alkaline lakes of the Brazilian Pantanal and Nabor Carrillo Lake, Texcoco region (Mexico), between 2004 and 2012, where they frequently formed bl...
La reserva de la Biósfera Pantanos de Centla se encuentra en el estado de Tabasco, entidad que cuenta con 53% del agua continental de México, ubicada en una zona tropical. Sin embargo, esta entidad posee un registro incipiente de especies algales (300). El objetivo de este trabajo fue describir la composición de las microalgas planctónicas de las l...
Background. Cantera Oriente houses a diverse microalgal component. The lentic ecosystems have received much greater attention than the lotic systems, which makes their study important. Goals. Compare cyanoprokaryotic communities found in a natural and an artificial lotic environment. To measure the relative density and frequency of species and to m...
A unicellular cyanobacterium, strain Alchichica-D10, was isolated from microbialites of the alkaline Lake Alchichica, Mexico. The cells were short rods (3.9 ± 0.6 μm in length and 1.1 ± 0.1 μm in width) forming biofilms of intense emerald green color. They exhibited red autofluorescence under UV light excitation. UV-visible absorption spectra revea...
91 taxa of benthic diatoms were recorded at several sites in the lake district Xochimilco-Tláhuac representing an increase of over 50 % in the floristic inventory of diatoms in this area. The study was based on analysis of 13 collections with fortnightly and monthly sampling during the dry and rainy seasons, simultaneously recording several environ...
Phytoplankton Channel El Bordo in Xochimilco was studied during the 2008 rainy season and the dry season of 2009. The objective was to determine the stability of the flora of an area requiring remediation. The results of this study showed a diverse composition of phytoplankton, which highlighted the registration of several species not previously ob...
Bromeliads have the ability to retain water in the leaf axils that are known as tanks or phytotelmata; they support complex food webs with all types of organisms from bacteria to small vertebrates. In this paper, we present the first approach to the microalgae living in the tanks of a species of bromeliad at “La Martinica” Ecological Reserve, in Ba...
Some water bodies in karst environments of the Yucatán peninsula are rich in tropical species of cyanoprokaryote metaphyton. We present species of Chroococcales and Oscillatoriales from seven different families and identify 14 new records for Mexico where four are described as new species (Asterocapsa xcaamalensis, Chlorogloea halkab, Cyanosarcina...
Novelo, E. y Tavera, R. 2013. Sobare los primeros registros de algas continentales en México. Boletín de la Sociedad Mexicana de Ficología 2: 14-15.
En los últimos años ha aumentado el interés por el conocimiento de las algas mexicanas, no sólo por los ficólogos nacionales, sino por los de otros países; esto se relaciona directamente seguramente co...
The Valley of Tehuacán-Cuicatlán is a semi-arid area that has a rich flora of algae in temporary and permanent water bodies, consisting of 357 species, many of them not previously registered in Mexico. The richness of this flora is distributed as follows: 183 species of Bacillariophyta (nearly 50%), 81 species of Cyanoprokaryota (22%), 77 species o...
We provide the first record of Anorthoneis dulcis Hein in México in two Oases of the southern Baja California Peninsula, thus extending the geographic distribution of this species in North America from East (Florida) to West (Baja California Sur). The pH values observed at one of the Oases (7.1-8.9) show that A. dulcis may thrive in a wider range o...
El conocimiento actual sobre las algas dulceacuícolas de México es muy desigual desde varios puntos de vista, a pesar de su reconocido potencial como indicadores de condiciones ambientales y de constituir la parte basal de las cadenas tróficas en los ambientes acuáticos. La mayor cantidad de registros de algas procede de la zona central del país, c...
Tavera, R. y E. Novelo. 2011. El perifiton de los humedales de Yucatán y la agricultura maya. Ciencias 102:40-45.
Resumen: El cieno o lama, como suele llamarse al perifiton es un importante indicador biológico de la calidad del agua y tiene importantes usos agrícolas que fueron aprovechados por los mayas.
Abstract: Sludge or slime, as the periphyto...
Novelo, E., Tavera, R. y Vidal, G. 2011. Las algas en los sitios arqueológicos mayas. Ciencias 104: 26-35. Algae on Mayan monuments are part of the biodiversity of the tropical zone and are not responsible for their deterioration, and can even help preserve them by reducing the impact of weathering. It is necessary to maintain them, and in some cas...
El proceso de evolución de agua de manantial a agua lacustre en el lago de Pátzcuaro involucra la precipitación de carbonatos de calcio, estimada en 18.7 mg CaCO 3 /L de agua de manantial y un total promedio de 1.27 g/cm 2 cada mil años.! Difractometría de rayos X! Presencia de microbialitas en la costa norte del lago de Pátzcuaro! Microscopía ópti...
Arthrospira comprises multicellular, cylindrical, usually screwlike coiled trichomes and is cultivated commercially. In this study, 33 new strains of Arthrospira isolated from plankton samples collected in Mexico, East Africa and India were investigated and compared with 53 strains or samples of earlier considerations. The study included observatio...
Surfaces of buildings at the archaeological site of Palenque, Mexico, are colonized by cyanobacteria that form biofilms, which in turn cause aesthetic and structural damage. The structural characterization and species composition of biofilms from the walls of one of these buildings, El Palacio, are reported. The distribution of photosynthetic micro...
We investigated the structure and diversity of diatoms in communities of metaphyton and periphyton from the wetland of El Edén Ecological Reserve, Quintana Roo, Mexico. In spite of the close association and communication between these communities, our comparisons reveal that the 2 communities have distinct species assemblages, with the periphyton b...
La ficología nacional requiere de la acción concertada de los profesionales que se dedican al estudio de las algas, en acciones que cubran la investigación, la formación de recursos, la difusión de la importancia del estudio de estos organismos y la vinculación de instituciones hacia soluciones conjuntas.
La investigación en ficología debe ser orie...
We investigated the structure and diversity of diatoms in communities of metaphyton and periphyton from the wetland of El Edén Ecological Reserve, Quintana Roo, Mexico. In spite of the close association and communication between these communities, our comparisons reveal that the 2 communities have distinct species assemblages, with the periphyton b...
Increasing degradation of the water quality, caused by overuse and salinization, leads to considerable changes of the phytoplankton
composition in Kenyan Rift Valley lakes. Exemplarily, the phytoplankton communities and biomasses of deteriorating freshwater
Lake Naivasha and salinizing Lake Oloidien were studied between 2001 and 2005, accompanied b...
Introducción La Cantera Oriente es parte de la zona de amortigua-miento de la Reserva Ecológica del Pedregal de San Ángel. La influencia que recibe de las zonas aledañas tiene componentes variados y difíciles de evaluar por la diversidad de microambientes presentes en ella. En particular , los cuerpos de agua de la Cantera Oriente tienen influencia...
A taxonomical and ecological characterization of some unicellular and coenobial species of green algae from few shallow water bodies of the Mexican Gulf coastal plateau is presented. Sixty-nine taxa were registered including a new form: Coelastrum pulchrum f. taverae nov. forma. The majority of species in the studied environments have a wide geogra...
Las algas epilíticas de las zonas tropicales en los monumentos mayas. *Eberto Novelo, Mónica Ramírez y Alejandro Villalobos
Lakamha' Boletín informativo del Museo y Zona Arqeuológica de Palenque Año 6 / Segunda época / No. 22. Enero marzo 2007: 3-7
Cyanobacteria are important for global nitrogen cycle and often form complex associations referred to as cyanobacterial mats or periphyton that are common in tropical, limestone-based wetlands. The objective of this study was to monitor the nitrogen fixation rate using the acetylene reduction assay of these cyanobacterial mats in a tropical, unfert...
151 samples from freshwater environments in karstic wetlands (cenotes, ponds
and inundated savannah) in El Edén Ecological Reserve were analyzed to describe
the diatom flora present. Latitudinal situation and environmental features of the
Reserve influence significantly the floristic diatom component. Of the 156 taxa
identified, 29 species have a t...
Report of the Launching Workshop UNESCO Project: IBSP 1-DE-09
The species belonging to genus Ophiocytium Nägeli (Mischococcales, Xanthophyceae) have a world distribution in acidic to neutral environments; these species are little common in floristic records in our country. The suitable conditions observed in Santa Ana, in México State, for development of Ophiocytiumspecies made possible their study for severa...
Acetylene reduction assay (ARA) was applied to determine the rate of nitrogen fixation by cyanoprokaryotes in a wetland in El Eden Ecological Reserve. The data obtained throughout a hydrological cycle showed both an increase of fixed nitrogen during wet periods and an important amount of nitrogen rate produced by non-heterocytic filamentous and col...
The chlorococcalean algae from the Ecological Park of Xochimilco were studied in some different water bodies filled with second level treated water. They are eutrophic and some of their physical and chemical water properties (temperature, pH) are similar. In contrary, the distribution of species is very heterogeneous. Fifty per cent of species were...
A new species of Cladophorella, C. netzahualpillii Galicia and Novelo, is described from the walls of some tanks of brackish water near Texcoco Lake, Mexico. The characteristic features of this cladophoroid filamentous alga are its reproduction by spores, the absence of a system of prostrate filaments with only a few rhizoids and the simultaneous g...
57 species a n d infraspecific taxa belong to 17 genus of diatoms from a creek in Texcala, near Tehuacan City, Puebla, Mexico are registered. Six taxa not reported before from Mexico are illustrated and escribed with notes of some eco logical characteristics and their geographical distribution. The new records are: Cocconeis scutellum var. parva (G...
Nine little known or ncw species of ihecyanoprokaryoüc genus CAroococcicv from tropical regions are prescntcd.Twoof them. Oí. /Jíj/vfdn/owiis Schmidle 1902 and Oí. ífií/Ji/íifiensis(Woloszyñska 1912) Gcíller 1925, were described as carly as in the first decades of this ceniury, but ignored by latcr authors, probabiy owing lo Ibc auiborliy of Geitle...
Ciencias 31: 59-61 (1993)
Comentarios sobre la intención de esta lista de descriptores El fin principal es presentar a los lectores una lista de descriptores que consideramos son de uso común para los ficólogos. Estos descriptores (caracteres en el sentido de una descripción taxonómica) han sido reunidos para proponerlos como un punto de partida ante la posibilidad de inter...
