Renato Andrés GarcíaUniversidad Nacional de Avellaneda | UNDAV · Ambiente y Turismo
Renato Andrés García
PhD
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Publications (43)
Resumen Los escasos estudios enzimáticos en líquenes muestran que la acción de las lacasas estaría asociada a una respuesta a condiciones de estrés, siendo este comportamiento similar al de especies de hongos saprofitos. En el presente estudio se analizó la actividad lacasa en la especie Ramalina Celastri (Spreng.) Krog & Swinscow con el fin de det...
Lichens are symbiotic organisms, usually composed of a fungal partner, the mycobiont, and one or more photosyn-thetic partners, the photobiont, which is most often either a green alga or a cyanobacterium, that harbor a diverse community of invertebrates such as rotifers, tardigrades, mites, springtails, crustaceans, and nematodes. In this work, we...
Lichens are a complex life form that is a symbiotic partnership of two separate organisms, a fungus and an alga, where the fungus provides a protective home for the alga and, in return, the alga produces food for the fungus from sunshine, water, and air. They fulfill ecological roles as a food source for many invertebrates and serve as the basal tr...
Mining activity affects the vegetation and soils of the ecosystems. However, the effects of mining activity on saxicolous lichen communities are less concerned. Thus, the aim of this study was to characterize saxicolous lichen communities in three basins (Vis-Vis River basin, Poteros River basin, and Capillitas River basin) surrounding metalliferou...
La colección de líquenes del Herbario Nacional de Plantas Celulares del Museo
Argentino de Ciencias Naturales “Bernardino Rivadavia” (BA-MACN) posee un
elevado valor histórico tanto por la antigüedad de muchos de sus ejemplares, que datan de fines del siglo XIX y principios del siglo XX, como por la relevancia de sus
colectores e identificadores. A...
On the southern bank of the Río de la Plata there is a forest ecosystem that has suffered
the ravages of urbanization, which is known as jungle or gallery forest. Within this ecosystem
there is a recently formed natural reserve: the Municipal Reserve “Eco Area of Avellaneda”, which
is surrounded by one of the most populated areas in the country. Ep...
Los hongos son un recurso natural que recibe creciente interés por parte de la sociedad en general. El uso de este recurso debe ser racional para asegurar su conservación para generaciones futuras. Luego del éxito de la Guía ilustrada de recolección de hongos, hemos generado esta guía que introduce en la identificación de los grandes grupos de hong...
The present contribution is motivated by the frequent occurrence of traces generated by lichens on the fossil record, the usual and erroneous attribution of them to plant roots, and the scarce information published about bioerosive damage caused by lichens. As a result, two different patterns were identified on the surface and inside the fossil bon...
A large part of the Antarctic surface is covered by lichens since they can withstand extreme environmental conditions. Lichens are primary colonizers and contribute to soil formation by deteriorating rocks through a combination of chemical and physical mechanisms. Therefore, fossil remains found exposed on the surface are usually colonized by epili...
The Peripampasic Arc is a set of low mountains / hills that connects the Andes, as it scatters to the East forming mountainous areas of lower heights in north-eastern Argentina, with the Atlantic coastal range of the Serra do Mar in Brazil. Numerous studies proved its important biogeographic connection for plant and animal phylogenies, but no infor...
The riparian forest is one of the most diverse environments of the La Plata River plains. It is represented by patches of humid forests, which are a valuable source of ecosystem services and have recreational and educational potential. However, the riparian forest has undergone constant modification, worsened by private real-estate developments and...
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Los hongos son un recurso natural que recibe creciente interés por parte de la sociedad en general. El uso de este recurso debe ser racional para asegurar su conservación para generaciones futuras. En esta guía compartimos algunos conceptos básicos sobre la biología y ecología de hongos, como también recomendamos métodos para su uso sustentable y c...
Lichens are organisms capable of colonizing almost every type of materials, provided they are stable and have sufficient exposure to light. The growing of lichens on bone surface is rare, due to the speed to which this substrate is weathered and destroyed. For the most part, documented cases occur in extreme environments, such as the Arctic and Ant...
Resumen — Verrucaria aethiobola es un liquen cosmopolita de agua dulce que previamente fue citado en Argentina para la provincia de Neuquén. En este trabajo se cita por primera vez para la provincia de Buenos Aires, aumentando su distribución conocida. Se presenta una descripción de la especie, imagen del espécimen y comentarios sobre su ecología y...
The European starling Sturnus vulgaris is a hole-nesting bird in which the male builds a voluminous nest using a wide variety of materials such as twigs, grass, leaves, feathers, and lichens. The function of lichens in starling nests has not been assessed until now and we hypothesize that this material is related to a mate attraction function or is...
Lichens constitute a mutualistic symbiotic association between a fungus or mycobiont and an algae or photobiont and from whose interaction a stable thallus it is develops, with specific structure and physiology. They are able to colonize a wide range of substrates: in addition to the natural surfaces provided by the rocks, the soil, bark, wood, lea...
Advances in the study of biodeterioration associated to the presence of lichens on archaeological lithic materials. La Primavera (Santa Cruz, Argentina). In this work, the biodeterioration caused by lichens growing on lithic archaeological artifacts from La Primavera was analyzed. The
methodology includes observation techniques of low and high magn...
Xanthoparmelia farinosa is a foliose lichen widely distributed in South America, growing not only on rocks but also on man-made structures. This species has abundant soralia, but it is unknown how development occurs from the soredium to the formation of a complete thallus. The soredia were extracted from the thallus with forceps, planted on glass p...
Contributions to the collection of liquenized fungi from the herbarium of the Institute of Botany Carlos Spegazzini (LPS). The Institute of Botany Carlos Spegazzini (IBCS) (UNLP, La Plata) hosts an herbarium of fungi (LPS) of approximately 40,000 specimens, with 4200 type specimens. The aim of this study was to examine the specimens of lichenized f...
Interspecific competition determines the distribution of species and the structure of communities. Crustose lichens are the first colonizers on rocky substrates and they compete among themselves for space and light. Previous studies have mentioned three possible situations resulting from the interaction that occur by contact between thalli of diffe...
Wood from heritage is usually attacked by wood-decay fungi generating mainly loss of dimensional and structural stability. The study of wood biodegradation process and its mechanism allow the obtaining of tools for wood conservation. In this paper, wood biodegradation and biodeterioration processes were studied in order to acquire a direct and visu...
Resumen Desde inicios del siglo pasado, las construcciones de hormigón modificaron el perfil y fisonomía de las ciudades. En el caso de la región pampeana bonaerense es muy llamativo observar cómo las construcciones elevadas ubicadas en diferentes ciudades se destacan contra la llanura. Estas construcciones, además del impacto visual que generan, i...
As part of an anthropological study, the lichenized fungi on the surface of archaeological remains from La Primavera locality in Santa Cruz province, Argentina, were identified. To achieve this, external morphological characters were observed and handmade cuts of apothecia were observed under light microscope; also the spot tests with K (potassium...
Como parte de un estudio de carácter antropológico se identificaron los hongos liquenizados sobre restos arqueológicos de superficie provenientes de la localidad La Primavera de la provincia de Santa Cruz, Argentina. Para esto se observaron caracteres morfológicos externos y cortes a mano alzada de apotecios que fueron observados bajo microscopio ó...
This study was based on the description of different species of lichens which were growing on metal plates exposed to the weather conditions in La Plata, Buenos Aires Province, Argentina. Among the six species observed, Caloplaca cinnabarina was the most common. Lichen species were identified by observation under optical microscope and chemical rea...
Los líquenes crecen sobre una gran variedad de sustratos, entre estos los materiales fabricados por el hombre. Este trabajo se centra en los líquenes que son capaces de crecer sobre cemento. Se colectaron los líquenes hallados sobre hormigón, morteros de cemento y revoques de estructuras en áreas urbanas y rurales de varias localidades de la provin...
Los líquenes son organismos capaces de crecer sobre una amplia variedad de superficies tanto naturales como artificiales, es el caso de los edificios y monumentos en las ciudades. En la provincia de Buenos Aires a pesar de ser una de las provincias con mayor desarrollo urbano del país, el conocimiento de su liquenobiota es aún es escaso. La mayoría...
Entre los monumentos pertenecientes al patrimonio se incluye al patrimonio funerario, íntimamente relacionado con la historia de la ciudad, en este caso, La Plata. En el cementerio local existen aproximadamente dos mil quinientas bóvedas de diferentes períodos y estilos, construidas básicamente con mampostería de ladrillos y revestimientos de morte...
A list was made including morphological characteristics of the new records of lichens foundamong the samples obtained by the authors in the forests that border rivers of the Natural Reserve of Punta Lara. Morphological characters as well as histological and spot test were used together with specific keys for identification. A total of 13 species we...
During the beginning of the 20 th century, marble was used as a luxury decorative element or to create sculptures and monuments, including funerary ones, but other calcareous stones of lesser quality were used too. In this case, studies were performed on stone pieces discarded from a 1900 tombstone at La Plata Cemetery (Buenos Aires Province, Argen...
El índice de peligrosidad (IP) de las plantas fue desarrollado en Italia por Signorini y es un número que va de 1 a 10 obtenido de una tabla preestablecida sumando valores dados por distintas características de la planta: si es anual, bianual o perenne; herbácea, arbustiva o arbórea; si tiene crecimiento lento, moderado o es invasora; si tiene raíc...
Al ser un material altamente poroso, los ladrillos cerámicos comunes absorben humedad del ambiente, lo que favorece el crecimiento de los microorganismos que encuentran más agua disponible, aunque también la pierden con gran rapidez en un ambiente seco. En este caso, se realizó el estudio de un monumento religioso construido con mampostería de ladr...
La Catedral de La Plata, diseñada por P. Benoit, se comenzó a construir en 1905 utilizando mampostería de ladrillos asentados sobre morteros, aunque fue concluida en 1999, año en que se realizaron tareas de hidrolavado y aplicación de hidrofugantes. Desde entonces, no ha sido objeto de tareas de limpieza, notándose en la actualidad la presencia de...
