David Rodríguez de la Cruz

University of Salamanca · Department of Botany, CIALE

The determination of pollen types and their proportions in the atmosphere of relevant urban areas have increasingly been evaluated in different regions. The final goal has been to elaborate a pollen calendar, providing data about the occurrence of pollen grains in the air, thus permitting medical treatment and prophylaxis. An aerobiological study w...

Patients with pollinosis show allergic symptoms related to airborne pollen levels, although this association is not always close. The use of new diagnostic techniques could improve our knowledge of this relationship. To evaluate the relationship between pollen counts and the results obtained using 2 diagnostic techniques: the skin prick test and al...

Temporal variation of airborne bracken (Pteridium aquilinum) spores concentration in Salamanca during 10 years from January 1998 to December 2007 were studied by using a Burkard spore trap, and correlations with some meteorological parameters were analyzed. The number of spores that were counted was very low, due probably to the distance between th...

The aim of this paper was to make a first approximation of the fungal spore airborne content in Valladolid along the year, constructing the first spore calendar for the middle-west of Spain. So that, we monitored the city during 2005 and 2006, being Cladosporium the most abundant type, present all over the year (together with Pleospora). The greate...

The fungal biodiversity associated with a stable plant community appears to vary from year to year. To analyse the annual behaviour in the formation of fruiting bodies, a statistical study of the data obtained for 4 years (2009–2012) in an apparently undisturbed Mediterranean ecosystem dominated by the holm oak (Quercus ilex L. subsp. ballota (Desf...

La fragmentación de hábitat, el efecto borde, el aislamiento geográfico y la presión agrícola y ganadera son algunas de las amenazas a las que se enfrentan numerosos ecosistemas mediterráneos, como El Monte de Villoria, donde se han estudiado tres parcelas con predominio de diferentes especies del género Quercus (encina, encina y roble melojo, y al...

The knowledge of the different plant species that make up the feeding diet of animals is highly important to develop more efficient strategies. This research aimed to characterize the food potential available for the Cuban stingless bee livestock of the Matanzas and Mayabeque provinces. Palynological analysis was done using 60 g of pollen from seal...

The methodology used for the determination of macrofungal diversity in Mediterranean areas differs in the time of sampling and the number of years displayed, making it difficult to compare results. Furthermore, the results could be refuted because the studies are being conducted over an insufficient number of years or without considering the variat...

The purpose of this study is to contribute to the knowledge about fungal spores in the atmosphere of the city of Salamanca (Middle West Spain), through the comparative study of Alternaria spore levels in two different sampling points within the same city. The study was done in terms of seasonal and hourly distribution and the possible influence of...

Las plantas vasculares que no forman semillas son conocidas con el nombre vulgar de helechos, presentando unas 120 especies en la península ibérica, más abundantes en ambientes forestales húmedos y saxícolas. En entornos urbanos y semiurbanos no suelen ser muy numerosos, un hecho que parece estar unido a la escasa presencia de sus esporas en la atm...

Biogeographical theory suggests that widespread retractions of species’ rear edges are expected due to anthropogenic climate change, affecting in a particularly intense way those linked to fragile habitats, such as species’ rear edges closely dependent on specific water conditions. In this way, this paper studies the potential effects of anthropoge...

The current situation of global environmental degradation as a result of anthropogenic activities makes it necessary to open new research lines focused on the causes and effects of the main alterations caused in the ecosystems. One of the most relevant is how the niche dynamics of invasive species change between different geographical areas, since...

The design of conservation plans for the improvement of habitats of threatened species constitutes one of the most plausible possibilities of intervention in the structure and composition of the landscape of a large territory. In this work we focus on the Iberian lynx in order to establish potential ecological corridors using ecoinformatic tools fr...

The use of bioindicators to assess the conservation status of various ecosystems is becoming increasingly common, although fungi have not been widely used for this purpose. The aim was to use the analysis of the macromycetes fruiting bodies in the area of a natural reserve and the degree of preservation of its different zones combined with the use...

BACKGROUND AND OBJECTIVES In the past years, was made a survey about the spores present in the atmosphere of Salamanca, resulting in the publication of the first spore calendar for the city in 2019. The aim of this work was to contribute to the knowledge about Alternaria concentration in Salamanca (MW Spain), comparing its airborne behaviour betwee...

In this paper, differences in the pollen levels detected in two parts of Salamanca (a city in central-western Spain) have been revealed using two volumetric samplers. One sampler was located in the city centre and the other in a semi-natural zone. The two sampling devices were separated by a distance of 1.4 km. During the two-year study period, the...

Aerobiological studies in urban areas are quite abundant in recent decades, but not in rural areas with a high environmental value. In this work, we analyze the airborne levels of pollen and fern spores in year 2012 collected by means of a volumetric sampler located in an ecological vineyard and in the Biosphere Reserve “Sierras de Béjar y Francia....

In this paper, we expose a preliminary study of the airborne fungal spore content in the atmosphere of Salamanca City including a fungal spore calendar. Sampling was carried out between February 2014 and February 2016, and along these 2 years of monitoring Cladosporium was the most abundant type followed by Aspergillus/Penicillium, both present fro...

An optimum nutrition through the consumption of a balanced amino acid-rich diet is essential for the good functioning of the immune system of animals. For such reason, the objective of this work was to determine the quantity of free proline, present in the consumed feedstuffs (pollen and honey) by the stingless bee livestock in the Matanzas and May...

Fungal spores suppose a high percentage of the total biologic content in the atmosphere, becoming an important agent from the clinic point of view, due to its allergenic potential. Along the last years, an increment has been noted in the sensibilization to Alternaria spores, especially in the Mediterranean zone. Its important investigate and unders...

Ampliación del conocimiento aerobiológico de la ciudad de Salamanca, aportando información preliminar del contenido atmosférico de esporas fúngicas de Alternaria, determinando su comportamiento estacional e intradiario, y estudiando la posible influencia de los principales parámetros meteorológicos sobre sus niveles atmosféricos.

Hasta 80 géneros de hongos se han relacionados con patología alérgica mediada por IgE. Las esporas de Alternaria alternata son un contaminante biológico bien conocido, considerándose una potente fuente de aeroalérgenos y su repercusión clínica está presumiblemente relacionada con los niveles de exposición. En nuestro medio, los hongos del género Al...

INTRODUCCIÓN Las esporas fúngicas suponen un porcentaje muy elevado del total del material biológico contenido en la atmósfera, siendo un importante agente ambiental desde una perspectiva clínica, a causa de su potencial alergénico. En los últimos años se ha observado además, un aumento en la sensibilización alérgica a este hongo ascomiceto, especi...

The effect of height on pollen concentration is not well documented and little is known about the near-ground vertical profile of airborne pollen. This is important as most measuring stations are on roofs, but patient exposure is at ground level. Our study used a big data approach to estimate the near-ground vertical profile of pollen concentration...

In the Iberian Peninsula, Oak Decline (hereafter, OD) is becoming a serious and frequently occurring disease in Mediterranean oaks. Decline processes seem to involve multiple biotic and abiotic factors, which combine to reduce the vigour of oak trees often causing death. However, the exact causes of its extension are still unknown and therefore, gi...

Pteridophyte airborne spores are scarcely represented worldwide compared to fungal spores or even to pollen grains. Through different studies, 81 taxa were identified in the atmosphere from different sampling points around the world with greater number of taxa in tropical and subtropical areas of Asia, America and Africa, the areas where pteridophy...

La familia de las cistáceas comprende 5 géneros y 63 especies sufruticosas, arbustivas o herbáceas en la península Ibérica, ocupando diversos tipos de emplazamientos, ya sea sobre sustratos ácidos o básicos, y formando parte de diferentes comunidades vegetales como matorrales o bosques aclarados de fagáceas, preferentemente en lugares fuertemente s...

Con el objetivo de catalogar botánicamente las mieles y determinar su origen geográfico, se realizan tanto análisis cuantitativos como cualitativos del sedimento botánico, de gran importancia en los procesos de control de calidad. A nivel cuantitativo, además de presentar el método que habitualmente empleamos en nuestro laboratorio [1], múltiples...

Background. Despite parks and gardens provide numerous benefits to population, the emission of pollen from ornamental flora has been identified as a major cause of pollen allergy in cities. In this sense, with the present work, we wanted to verify the evolution of the allergenic potential of one of the oldest parks in the city of Salamanca (San Fra...

Background.Omphalodes brassicifolia (Lag.) Sweet., belonging to the Boraginaceae family, is an endemic species of the Iberian Central System, which can be found in two Spanish regions: Castilla y Leónand Extremadura. The following work aims to provide information on the pollen grain morphology and the strategies of reproductive biology presented by...

Background. Due to its importance as an aeroallergen, the atmospheric content of Alternariasporeswas monitored in 2014 in the city of Salamancaand the results compared with those obtained more than 15 years before, in 1995 and 2000). Methods. The methods and materials used in this research are set out in the manual of the Spanish AerobiologyNetwork...

Desde el año 2014, gracias a la financiación de la Diputación de Salamanca/OAEDR y al apoyo de ASFOSA y COAG Salamanca, se ha puesto en marcha en el Departamento de Botánica y Fisiología Vegetal (USAL), un proyecto de investigación que tiene como objetivo evaluar el estado actual de la dehesa salmantina en relación a los procesos de decaimiento for...

Fifteen exotic aquatic and semi aquatic Non-native Invasive Species (NIS) plus another thirteen exotic species (herbs and trees) were detected in a meandering stretch of 8.5 km and in an agricultural waterway and pools complex in Castejón (Ebro River floodplain, Navarra, NE Spain). The zebra mussel was the most ubiquitous NIS in all types of aquati...

Urban parks play a key role in the provision of ecosystem services, actively participating in improving the quality of life and welfare of local residents. This paper reports on the application of an index designed to quantify the allergenicity of urban parks in a number of Spanish cities. The index, which records biological and biometric parameter...

Urban green spaces are areas of recreation of urban dwellers that must comply with the requirements of sustainability and health in the context of current city. However, the lack of planning in the design of these spaces, coupled with low biodiversity and massive use of a few species, lead to the implantation of trees involved in processes of adver...

Los parques urbanos son elementos de la infraestructura verde que deben contribuir a mejorar la calidad de vida y el bienestar ciudadano. En este trabajo se presentan los resultados de la aplicación de un novedoso índice que estima la alergenicidad potencial de las zonas verdes urbanas. Este índice, que contempla parámetros biológicos y biométricos...

Three main species of Popululs L. (Salicaceae) have been reported to occur in the Iberian Peninsula: Populus nigra L., Populus alba L. and Populus tremula L. The degree of pilosity of the bracts of the male catkins is a key character for their differentiation. The anthers of these poplar species possess anthocyanins that provide them a red colourat...

This study investigates the pollen of Cupressaceae in the atmosphere of Salamanca during the years 2000-2007. Annual variations in the concentration of pollen in the atmosphere were analysed by the volumetric method using Hirst spore trap. From a quantitative point of view, Cupressaceae is the third most abundant airborne taxa in the city of Salama...

This article is focused on the seasonal variation in the contents of 5-methoxycanthin-6-one from the leaves of Zanthoxylum chiloperone (Rutaceae). Based on the pharmacological interest presented by 5-methoxycanthin-6-one, its seasonal variation in Z. chiloperone leaves was analysed in order to determine the best time for harvesting, optimising the...

This communication shows the results of monitoring the pollen and pteridophyte spores in the atmosphere of the Biosphere Reserve UNESCO-MAB (2006) «Sierras de Francia y Béjar» (MW Spain) by means of Hirst Volumetric Spore Trap during years 2011-2012 located in a ecological vineyard (Viñas del Cámbrico, S. L.; Villanueva del Conde Municipal District...

Twenty eight honey samples labelled as monofloral and Spanish were studied by means of quantitative and qualitative methods: orange blossom (11), eucalyptus (10) and rosemary (7). Quantitative analysis displayed a higher number of botanical elements in eucalyptus honeys (354497/10 g of honey) than in orange blossom and rosemary honeys (100111 y 767...

Twenty eight honey samples labelled as monofloral and Spanish were studied by means of quantitative and qualitative methods: orange blossom (11), eucalyptus (10) and rosemary (7). Quantitative analysis displayed a higher number of botanical elements in eucalyptus honeys (354497/10 g of honey) than in orange blossom and rosemary honeys (100111 y 767...

We analysed the occurrence of the Echium pollen in the atmosphere of Salamanca, on the basis of 8-year observation (2000–2007) with the aim to evaluate its aerobiological behaviour. Aerobiological samples were collected by the Hirst volumetric method with a 7-day Burkard spore trap. The atmospheric pollen season of Echium was observed in late sprin...

En la Universidad de Salamanca llevamos realizando desde hace muchos años sesiones de análisis sensorial con paneles de catadores no expertos y se ha podido comprobar que existen algunos problemas a la hora del correcto entrenamiento de los catadores con las escalas, sobre todo con el color de las mieles cristalizadas. M. González y C. de Lorenzo (...

En este trabajo se presentan los datos extraídos de sendas catas de mieles realizadas en la ciudad de Salamanca durante el año 2009; en el mes de marzo en el Centro Hispano-Luso de Investigaciones Agrarias de la Universidad de Salamanca (CIALE), en la que participaron 24 personas y durante el mes de julio, como actividad incluida dentro de los curs...

Las sesiones de análisis sensorial organizadas por el Grupo de Palinología y Conservación Vegetal en la USAL a lo largo de los últimos años se han llevado a cabo con catadores muy diversos que son entrenados para poder analizar de mieles diferentes. En este trabajo se comparan dos de esas jornadas en las que el panel de cata estaba configurado por...

Los controles de calidad de productos de origen natural requieren de diversos análisis, entre los que se encuentran los análisis polínicos para determinar su origen floral y geográfico, evitando así posibles fraudes. Con este trabajo se pretende contribuir a un mayor conocimiento del espectro polínico de mieles monoflorales y, a su vez, estimar si...

Chenopodiaceae-Amaranthaceae pollen represents an allergenic risk for pollen-sensitive people. Th e aim of this study was to describe the Chenopodiaceae-Amaranthaceae pollen dynamics in the atmosphere of Salamanca (mid-west Spain) during the years 2000-2007. Measurements were performed by the volumetric method using a Burkard spore trap located in...

Seasonal and intra-daily patterns of Periconia s.l. spores in the atmosphere of Valladolid have been analyzed during 2005-2007 period. Thus, the influence of the main meteorological parameters on airborne concentrations has been studied, determining a clear affinity of this genus of fungi for low temperatures. Se ha analizado el comportamiento est...

The present abstract provides information referred to a fungal spore type (Periconia s.l.), as a part of the first aeropalynological study carried out in Valladolid (Spain). The monitored period comprised since February 2005 to January 2007 and the methodology used was the one proposed by the Spanish Aerobiology Network (Galán et al., 2007). Seas...

Data obtained with a volumetric pollen sampler in one site are usually extrapolated to cover larger areas, about some tens of kilometres. The objective of the present study was to evaluate differences in airborne pollen content between two aerobiological stations located 2 km apart at similar heights (20 and 25 m over ground level, respectively) du...

Pteridophyte airborne spores are scarcely represented worldwide compared to fungal spores or even to pollen grains. However, the levels of fern spores in the atmosphere are connected to the distribution and abundance of different Pteridophyta species, being tropical and subtropical zones of Asia, America and Africa, the areas where fern spores are...

Background: Patients with pollinosis show allergic symptoms related to airborne pollen levels, although this association is not always close. The use of new diagnostic techniques could improve our knowledge of this relationship. Objective: To evaluate the relationship between pollen counts and the results obtained using 2 diagnostic techniques: the...

A través del análisis sensorial se pueden diferenciar tipos de mieles y podemos intentar correlacionar estos análisis con los resultados palinológicos de las mismas mieles. En nuestro estudio, han sido analizadas 11 mieles etiquetadas comercialmente como: azahar, acacia, encina, eucalipto, romero, castaño, almendro, aguacate, brezo, tomillo y romer...

La presencia de esporas fúngicas en la atmósfera, está condicionada por las variaciones en los parámetros meteorológicos, que influyen además, en su comportamiento aerobiológico. Dentro del primer muestreo aeropalinológico realizado en Valladolid (periodo 2005-2006), se presentan en este trabajo los datos preliminares del comportamiento estacional...

Una buena parte de los estudios aerobiológicos que se están llevando a cabo en la actualidad hacen referencia a diferentes aspectos fenológicos de muchas especies, especialmente anemófilas, gracias a los datos aportados a través de la lectura de las muestras obtenidas con captadores volumétricos. Así pues, mediante una serie de datos de mediana amp...