Lixiviació de nutrients i producció de maduixot. Efectes del maneig de la fertirrigació

L'estudi desenvolupa a escala d'explotació agrícola un model de gestió de l'aigua i dels fertilitzants per al cultiu del maduixot en sòls sorrencs d'elevada permeabilitat, amb l'objectiu de reduir l'efecte contaminant derivat de l'ús intensiu de fertilitzants en aquest conreu, sense renunciar a la productivitat. Els resultats obtinguts mostren que la utilització conjunta de solucions nutritives de concentració reduïda i el criteri de reg, a partir de mesures de tanc d'evaporació, permeten un ús més eficient de l'aigua i els fertilitzants i que es mantenen els nivells productius i la qualitat.A water and fertilisers management model is being developed at farm level that allows the control of strawberry production in permeable sandy soils. The main objective is to reduce the potential chemical degradation of the soil due to the general intensive use of fertilisers without decreasing productivity. The results show that the coupled use of nutritive solutions at low concentrations and an irrigation criteria based on evaporation tank measurements allow a more efficient water and fertiliser use while production levels and quality.El estudio desarrolla a escala de explotación agrícola un modelo de gestión del agua y de los fertilizantes, para el cultivo del fresón en suelos arenosos de elevada permeabilidad, con el objetivo de reducir el efecto contaminante derivado del uso intensivo de fertilizantes en este cultivo sin renunciar a la productividad. Los resultados obtenidos muestran que la utilización conjunta de soluciones nutritivas de concentración reducida y el criterio de riego a partir de medidas de tanque de evaporación permiten un uso más eficiente del agua y los fertilizantes y que se mantienen los niveles productivos y la calidad

Diversity and function of prevalent symbiotic marine bacteria in the genus Endozoicomonas

© The Author(s), 2016. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Applied Microbiology and Biotechnology 100 (2016): 8315–8324, doi:10.1007/s00253-016-7777-0.Endozoicomonas bacteria are emerging as extremely diverse and flexible symbionts of numerous marine hosts inhabiting oceans worldwide. Their hosts range from simple invertebrate species, such as sponges and corals, to complex vertebrates, such as fish. Although widely distributed, the functional role of Endozoicomonas within their host microenvironment is not well understood. In this review, we provide a summary of the currently recognized hosts of Endozoicomonas and their global distribution. Next, the potential functional roles of Endozoicomonas, particularly in light of recent microscopic, genomic, and genetic analyses, are discussed. These analyses suggest that Endozoicomonas typically reside in aggregates within host tissues, have a free-living stage due to their large genome sizes, show signs of host and local adaptation, participate in host-associated protein and carbohydrate transport and cycling, and harbour a high degree of genomic plasticity due to the large proportion of transposable elements residing in their genomes. This review will finish with a discussion on the methodological tools currently employed to study Endozoicomonas and host interactions and review future avenues for studying complex host-microbial symbioses.This work was supported by a KAUST-WHOI Post-doctoral Partnership Award to MJN and a KAUST-WHOI Special Academic Partnership Funding Reserve Award to CRV and AA. Research in this study was further supported by baseline research funds to CRV by KAUST and NSF award OCE-1233612 to AA

Colémbolos (Hexapoda, Collembola) asociados con carpóforos de basidiomicetes recolectados en el SW de Cataluña

Collembola (Hexapoda, Collembola) associated with Basidiomycetes sporocarps in SW Catalonia. We have studied the collembola species found in basidiomata of 41 different species of fungi belonging to the Class Basidiomycetes, collected in several districts of the mediterranean SW Catalonia. We have found 5575 individuals of collembola of nine different species. Ceratophysella tergilobata represents the 99,8% of the total individuals and is present in the 94,8% of analysed basidiomata. In consequence this species must be considered an habitual inhabitant of the basidiomata of the mediterranean districts of Catalonia. The examination of the gut content of the studied col1embola reveals that their relationship with the basidiomata is of nutritional type.Se han estudiado las especies de colémbolos presentes en basidiomas de 41 especies distintes de hongos de la Clase Basidiomicetes, recolectadas en diferentes comarcas de la Cataluña mediterrànea. Se han encontrado 5.575 ejemplares de colémbolos, pertenecientes a nueve especies. Ceratophysella tergilobata representa el 99,8% del total de ejemplares y esta presente en el 94,8% de los basidiomes examinados, por lo que se considera un habitante habitual de las setas de las comarcas de la Cataluña mediterránea. El examen del contenido intestinal de los colémbolos estudiados revela que su relación con los cuerpos fruetíferos de los hongos es de tipo nutricional

Some recent developments in quantization of fractal measures

We give an overview on the quantization problem for fractal measures, including some related results and methods which have been developed in the last decades. Based on the work of Graf and Luschgy, we propose a three-step procedure to estimate the quantization errors. We survey some recent progress, which makes use of this procedure, including the quantization for self-affine measures, Markov-type measures on graph-directed fractals, and product measures on multiscale Moran sets. Several open problems are mentioned.Comment: 13 page

Colémbolos (Hexapoda, Collembola) asociados con carpóforos de basidiomicetes recolectados en el SW de Cataluña

Collembola (Hexapoda, Collembola) associated with Basidiomycetes sporocarps in SW Catalonia. We have studied the collembola species found in basidiomata of 41 different species of fungi belonging to the Class Basidiomycetes, collected in several districts of the mediterranean SW Catalonia. We have found 5575 individuals of collembola of nine different species. Ceratophysella tergilobata represents the 99,8% of the total individuals and is present in the 94,8% of analysed basidiomata. In consequence this species must be considered an habitual inhabitant of the basidiomata of the mediterranean districts of Catalonia. The examination of the gut content of the studied col1embola reveals that their relationship with the basidiomata is of nutritional type.Se han estudiado las especies de colémbolos presentes en basidiomas de 41 especies distintes de hongos de la Clase Basidiomicetes, recolectadas en diferentes comarcas de la Cataluña mediterrànea. Se han encontrado 5.575 ejemplares de colémbolos, pertenecientes a nueve especies. Ceratophysella tergilobata representa el 99,8% del total de ejemplares y esta presente en el 94,8% de los basidiomes examinados, por lo que se considera un habitante habitual de las setas de las comarcas de la Cataluña mediterránea. El examen del contenido intestinal de los colémbolos estudiados revela que su relación con los cuerpos fruetíferos de los hongos es de tipo nutricional

Lixiviació de nutrients i producció de maduixot. Efectes del maneig de la fertirrigació

L'estudi desenvolupa a escala d'explotació agrícola un model de gestió de l'aigua i dels fertilitzants per al cultiu del maduixot en sòls sorrencs d'elevada permeabilitat, amb l'objectiu de reduir l'efecte contaminant derivat de l'ús intensiu de fertilitzants en aquest conreu, sense renunciar a la productivitat. Els resultats obtinguts mostren que la utilització conjunta de solucions nutritives de concentració reduïda i el criteri de reg, a partir de mesures de tanc d'evaporació, permeten un ús més eficient de l'aigua i els fertilitzants i que es mantenen els nivells productius i la qualitat.El estudio desarrolla a escala de explotación agrícola un modelo de gestión del agua y de los fertilizantes, para el cultivo del fresón en suelos arenosos de elevada permeabilidad, con el objetivo de reducir el efecto contaminante derivado del uso intensivo de fertilizantes en este cultivo sin renunciar a la productividad. Los resultados obtenidos muestran que la utilización conjunta de soluciones nutritivas de concentración reducida y el criterio de riego a partir de medidas de tanque de evaporación permiten un uso más eficiente del agua y los fertilizantes y que se mantienen los niveles productivos y la calidad.A water and fertilisers management model is being developed at farm level that allows the control of strawberry production in permeable sandy soils. The main objective is to reduce the potential chemical degradation of the soil due to the general intensive use of fertilisers without decreasing productivity. The results show that the coupled use of nutritive solutions at low concentrations and an irrigation criteria based on evaporation tank measurements allow a more efficient water and fertiliser use while production levels and quality

Dispersion and collapse in stochastic velocity fields on a cylinder

The dynamics of fluid particles on cylindrical manifolds is investigated. The velocity field is obtained by generalizing the isotropic Kraichnan ensemble, and is therefore Gaussian and decorrelated in time. The degree of compressibility is such that when the radius of the cylinder tends to infinity the fluid particles separate in an explosive way. Nevertheless, when the radius is finite the transition probability of the two-particle separation converges to an invariant measure. This behavior is due to the large-scale compressibility generated by the compactification of one dimension of the space

Visions of the World by Pepper and its application to Health Education

INTRODUCCIÓN: Las metáforas impregnan nuestra vida cotidiana y no sólo el lenguaje también el pensamiento y la acción. La enfermera usa las metáforas como recurso didáctico para facilitar la comunicación y la comprensión de conceptos abstractos. Los usuarios expresan sus vivencias de salud o enfermedad a través de metáforas de su ámbito personal y cotidiano. La comprensión del uso de las metáforas en Educación para la Salud (EpS) requiere examinar también los paradigmas dentro de los cuales las metáforas son construidas. Este estudio pretende conocer las metáforas básicas o “visones del mundo” que utilizan la enfermera en la consulta de atención primaria en sus intervenciones educativas-asistenciales con usuarios afectados enfermedades crónicas

The porin and the permeating antibiotic: A selective diffusion barrier in gram-negative bacteria

Gram-negative bacteria are responsible for a large proportion of antibiotic resistant bacterial diseases. These bacteria have a complex cell envelope that comprises an outer membrane and an inner membrane that delimit the periplasm. The outer membrane contains various protein channels, called porins, which are involved in the influx of various compounds, including several classes of antibiotics. Bacterial adaptation to reduce influx through porins is an increasing problem worldwide that contributes, together with efflux systems, to the emergence and dissemination of antibiotic resistance. An exciting challenge is to decipher the genetic and molecular basis of membrane impermeability as a bacterial resistance mechanism. This Review outlines the bacterial response towards antibiotic stress on altered membrane permeability and discusses recent advances in molecular approaches that are improving our knowledge of the physico-chemical parameters that govern the translocation of antibiotics through porin channel

Environmental drivers of distribution and reef development of the Mediterranean coral Cladocora caespitosa

Cladocora caespitosa is the only Mediterranean scleractinian similar to tropical reef-building corals. While this species is part of the recent fossil history of the Mediterranean Sea, it is currently considered endangered due to its decline during the last decades. Environmental factors affecting the distribution and persistence of extensive bank reefs of this endemic species across its whole geographic range are poorly understood. In this study, we examined the environmental response of C. caespitosa and its main types of assemblages using ecological niche modeling and ordination analysis. We also predicted other suitable areas for the occurrence of the species and assessed the conservation effectiveness of Mediterranean marine protected areas (MPAs) for this coral. We found that phosphate concentration and wave height were factors affecting both the occurrence of this versatile species and the distribution of its extensive bioconstructions in the Mediterranean Sea. A set of factors (diffuse attenuation coefficient, calcite and nitrate concentrations, mean wave height, sea surface temperature, and shape of the coast) likely act as environmental barriers preventing the species from expansion to the Atlantic Ocean and the Black Sea. Uncertainties in our large-scale statistical results and departures from previous physiological and ecological studies are also discussed under an integrative perspective. This study reveals that Mediterranean MPAs encompass eight of the ten banks and 16 of the 21 beds of C. caespitosa. Preservation of water clarity by avoiding phosphate discharges may improve the protection of this emblematic species.Spanish Ministry of Economy and Competitiveness [CTM2014-57949-R]info:eu-repo/semantics/publishedVersio