Repositorio Institucional de INECOL (Instituto de Ecología)
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Anfibios, reptiles y mamíferos del cerro Buenavista y la cantera Cuautlapan: inventario y monitoreo
No full textConservación de germoplasma in vitro de "Lirio de todos Santos" Laelia anceps Lindl. subsp. anceps Lindl. f. semialba (Orchidaceae)
No full textSe estableció un protocolo para retardar el crecimiento de plántulas de Laelia anceps Lindl., subsp. anceps Lindl., f. semialba, comúnmente llamado lirio de Todos Santos (color blanco), con el fin de poder establecer las bases para su conservación in vitro a corto-mediano plazo. Se adicionaron al medio de cultivo MS inductores de estrés osmótico (sacarosa, manitol y sorbitol), además se evaluó el efecto del ácido abscísico (ABA), así como la incubación a bajas temperaturas (5 grados C). En todos los casos, a excepción de las bajas temperaturas donde las plántulas no sobrevivieron, se logró disminuir su crecimiento. De los diferentes compuestos empleados, el ABA (5 y 10 mg/l) y el manitol (60 g/l) fueron los que indujeron el menor crecimiento sin afectar la viabilidad de las plántulas e indujeron una formación de brotes por explante baja. Estos resultados permiten conservar un gran número de plantas de L. Anceps subsp. anceps f. semialba, en espacios relativamente pequeños, además puede servir como base para la conservación de otras especies de orquídeas
New taxonomical and ethnomycological observations on Psilocybe s.s. (Fungi, Basidiomycota, Agaricomycetidae, Agaricales, Strophariaceae) from Mexico, Africa and Spain
Get PDFA new emendation of Psilocybe zapotecorum is presented, based on a new study on the holotype and on the description of pseudocystidia, pleurocystidia and cheilocystidia, confusingly described previously. An extensive and careful review of all holotypes of synonyms, and the wide neotropical distribution is also presented. The traditions as sacred mushroom are analyzed based on a study of codices and anthropological pieces, where P. zapotecorum and related species as P. muliercula and P. moseri are identi ed. Some of the codices and anthropological pieces showed that the cult of Quetzalcóatl was related to the use of these mushrooms. The application and meaning of the words ?teonanácatl? from Sahagún and ?teotlaquilnanácatl? by Guzmán are reviewed. Moreover, the relationship of P. mairei to the prehistoric mushroom depictions at Tassili in the Sahara Desert is discussed, and the rst study of authentic material of this species from Algeria is presented, from where a neotype is selected. Finally, the relationship between a prehistoric mural in Spain and P. hispanica is also discussed
Relaciones filogenéticas del género Diplotaxis Kirby (Insecta: Coleoptera: Scarabaeidae) basadas en caracteres morfológicos del adulto
No full textDistribución potencial y estratificación de los Triamonios (Hemiptera: Reduviiade: Triatominae), vectores de la enfermedad de Chagas en el estado de Veracruz
No full textDual purpose microalgae-bacteria-based systems that treat wastewater and produce biodiesel and chemical products within a biorefinery
Get PDFExcess greenhouse gas emissions and the concomitant effect on global warming have become significant en- vironmental, social and economic threats. In this context, the development of renewable, carbon-neutral and economically feasible biofuels is a driving force for innovation worldwide. A lot of effort has been put into de- veloping biodiesel from microalgae. However, there are still a number of technological, market and policy barriers that are serious obstacles to the economic feasibility and competitiveness of such biofuels. Converse- ly, there are also a number of business opportunities if the production of such alternative biofuel becomes part of a larger integrated system following the Biorefinery strategy. In this case, other biofuels and chemical products of high added value are produced, contributing to an overall enhancement of the economic viability of the whole integrated system. Additionally, dual purpose microalgae?bacteria-based systems for treating wastewater and production of biofuels and chemical products significantly contribute to a substantial saving in the overall cost of microalgae biomass production. These types of systems could help to improve the com- petitiveness of biodiesel production from microalgae, according to some recent Life Cycle Analysis studies. Furthermore, they do not compete for fresh water resources for agricultural purposes and add value to treating the wastewater itself. This work reviews the most recent and relevant information about these types of dual purpose systems. Several aspects related to the treatment of municipal and animal wastewater with simultaneous recovery of microalgae with potential for biodiesel production are discussed. The use of pre-treated waste or anaerobic effluents from digested waste as nutrient additives for weak wastewater is reviewed. Isolation and screening of microalgae/cyanobacteria or their consortia from various wastewater streams, and studies related to population dynamics in mixed cultures, are highlighted as very relevant fields of research. The species selection may depend on various factors, such as the biomass and lipid productivity of each strain, the characteristics of the wastewater, the original habitat of the strain and the climatic condi- tions in the treatment plant, among others. Some alternative technologies aimed at harvesting biomass at a low cost, such as cell immobilization, biofilm formation, flocculation and bio-flocculation, are also reviewed. Finally, a Biorefinery design is presented that integrates the treatment of municipal wastewater with the re- covery of oleaginous microalgae, together with the use of seawater supplemented with anaerobically digested piggery waste for cultivating Arthrospira (Spirulina) and producing biogas, biodiesel, hydrogen and other high added value products. Such strategies offer new opportunities for the cost-effective and com- petitive production of biofuels along with valuable non-fuel products
VEGETACIÓN DE LA SIERRA MADRE OCCIDENTAL, MÉXICO: UNA SÍNTESIS
Get PDFLa Sierra Madre Occidental (SMO) es el complejo montañoso más grande de México, extendiéndose por casi 1200 km desde el noreste de Sonora (30°35' N) hasta el norte de Jalisco (21°00' N). A pesar de su gran importancia ambiental y económica, es todavía deficientemente conocida. Se presenta una sinopsis de los tipos de vegetación, con datos sobre la superficie que ocupan las comunidades reconocidas, intervalos de elevación y climas donde se localizan, así como un mapa. En la zona confluyen tres regiones, albergando ecosistemas templados y semifríos (región Madrense), semiáridos (Madrense-Xerófila) y cálido-secos (Tropical), respectivamente. La región Madrense, en el macizo de la sierra, incluye bosque de pino, bosque mixto de coníferas, bosque de pino-encino, bosque de encino y manchones de bosque mesófilo de montaña, además de comunidades como chaparral (primario y secundario) y vegetación de claros de bosque. La región Madrense-Xerófila, en el piedemonte norte y oriental y estribaciones al oriente de la sierra, presenta bosque bajo abierto (de encino o de pino-encino), matorral perennifolio y zonas de ecotonía hacia pastizal y matorral xerófilo, además de ecotonías con matorral subtropical hacia el sur del Archipiélago Madrense. En la región Tropical, a lo largo de la base occidental de la sierra e ingresando a esta a través de las barrancas y quebradas, predomina bosque tropical caducifolio y matorral subtropical, con pequeñas áreas de bosque tropical subcaducifolio. La alta diversidad de la SMO se ejemplifica con los tres géneros dominantes fisonómicamente en la vegetación: 24 especies de Pinus (46% del total nacional), 54 de Quercus (34%) y 7 de Arbutus (100%)
