1,068 research outputs found

    Evaluación de la transformación del matorral del Parque Nacional de Doñana como medida de gestión y su impacto sobre la comunidad de micromamíferos.

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    Una de las principales medidas de gestión que se realizan en el Parque Nacional de Doñana dentro del Plan de manejo del lince (Lynx pardina) y del águila imperial (Aquila adalberti) es el desbroce de matorral, con ob- jeto de crear zonas abiertas de alimentación para el conejo (Oryctolagus cuniculus). Esta medida de gestión está produciendo una profunda modificación en la estructura de la vegetación, y aunque afecta positiva- mente a los conejos, se desconoce su efecto sobre otras especies características de este hábitat como son los micromamíferos, cuya comunidad podría estar sufriendo importantes procesos de cambio. En concreto una de las especies más características de esta comunidad, el lirón careto atlántico, Eliomys quercinus lusitanicus, abundante en el pasado es ahora extremadamente rara, e incluso podría haber desparecido del área. Este estudio tiene como objetivo evaluar el efecto de la eliminación del matorral, mediante quema con- trolada, sobre la comunidad de micromamíferos. Para ello hemos analizado la riqueza y abundancia es- pecíficas y la evolución temporal de estos parámetros en parcelas quemadas de diferente antigüedad y en zonas no sometidas a tratamiento. La toma de datos se realizó mediante captura-recaptura en pe- riodos estacionales, desde el verano de 2005 a la primavera de 2007. Los resultados mostraron que la riqueza específica fue muy baja, con tan solo 4 especies capturadas (Mus spretus, Apodemus sylvaticus, Crocidura russula y Eliomys quercinus). La abundancia presentó valo- res muy variables dependiendo de la especie, la época del año y el tipo de parcela; aunque se observa que la especie más abundante es Mus spretus con mucha diferencia sobre las demás. En general, el otoño y el invierno fueron las estaciones con mayor abundancia, y ésta se hace muy escasa durante el verano. La quema controlada del matorral mediterráneo senescente en el Parque Nacional de Doñana favorece la presencia de especies y su abundancia, no tanto en la propia parcela sometida a tratamiento, como en el matorral que la bordea. Mus es la especie dominante en todos los ambientes. Apodemus muestra mecanis- mos de evitación espacial y temporal con Mus. Eliomys quercinus no ha desaparecido de Doñana, aunque su abundancia es escasísima y aparece asociada al borde de parcelas quemadas de cuatro años de antigüedad. El proceso de colonización de las parcelas quemadas parece alcanzar la abundancia más alta y la mayor riqueza específica a los tres-cuatro años tras la quema. Esta colonización no sigue una pauta regular en el tiempo, sino que se encuentra condicionada por otros factores, entre los que parece encontrarse la pre- cipitación anual.Peer Reviewe

    Mineralogical and textural characterization of Tartessian ceramics from Ategua (Córdoba, Spain)

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    El cerro de Teba situado en la Depresión del Guadalquivir, provincia de Córdoba (España), constituye uno de los yacimientos arqueológicos más interesantes de la época tartésica. En la falda de la colina de Ategua, se han encontrado restos prerromanos (precoloniales, tartesicos e ibéricos) con algunas estructuras de enterramiento y una gran riqueza de piezas cerámicas. Cerámicas de época tartésica hechas a torno (fases II y III “orientalizantes”) son las que se estudian en este trabajo. Se ha estudiado la mineralogía, composición química y la textura de estas piezas para obtener información sobre el posible origen de las materias primas utilizadas en la fabricación de las cerámicas. Algunos minerales así como los restos de fósiles son propios de ciertos ambientes, y su detección en las cerámicas permite abordar el origen de las materias primas con que se elaboraron las piezas. Determinar el origen es siempre uno de los objetivos que se plantea en este tipo de estudios, ya que los datos sobre las piezas y el entorno ayudan a abordar el problema de la autóctonía o aloctonía de las cerámicasTeba hill, located in the Guadalquivir depression (Córdoba, Spain), is one of the most interesting archaeological deposits from the Tartessian period. A number of pre-Roman (pre-colonial, Tartessian and Iberian) remains including some burial structures and a wealth of ceramic pieces have been found on the skirt of the Ategua hill. In this work, have been studied wheel-thrown ceramic pieces from Phases II and III (orientalizing). The mineralogical characteristics, chemical composition and texture of the pieces were used to identify the potential origin of the raw materials used in their production. Some minerals are as well as fossil remains in fact typical of specific environments, so their presence in a ceramic piece can help trace the origin of its components. Elucidating the origin of such materials is a common objective in these studies since accurate information obtained from ceramic pieces and their environment can help one determine whether they are autochthonous or allochthonous

    II Jornadas de la Sociedad Española para la Conservación y Estudio de Los Mamíferos (SECEM) Soria 7-9 diciembre 1995

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    Seguimiento de una reintroducción de corzo (Capreolus capreolus) en ambiente mediterráneo. Dispersión y área de campeoModelos de distribución de los insectívoros ern la Península IbéricaDieta anual del zorro, Vulpes vulpes, en dos hábitats del Parque Nacional de DoñanaDesarrollo juvenil del cráneo en las poblaciones ibéricas de gato montés, Felis silvestris Schreber, 1777Presencia y expansión del visón americano (Mustela vison) en las provincias de Teruel y Castellón (Este de España).Preferencias de hábitat invernal de la musaraña común (Crocidura russula) en un encinar fragmentado de la submeseta norteUso de cámaras automáticas para la recogida de información faunística.Dieta del lobo en dos zonas de Asturias (España) que difieren en carga ganadera.Consumo de frutos y dispersión de semillas de serbal (Sorbus aucuparia L.) por zorros y martas en la cordillera Cantábrica occidentalEvaluación de espermatozoides obtenidos postmorten en el ciervo.Frecuencia de aparición de diferentes restos de conejo en excrementos de lince y zorroAtlas preliminar de los mamíferos de Soria (España)Censo y distribución de la marmota alpina (Marmota marmota) en Navarra.Trampeo fotográfico del género Martes en el Parque Nacional de Aigüestortes i Estany de Sant Maurici (Lleida)Peer reviewe

    Revista de Vertebrados de la Estación Biológica de Doñana

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    Clave preliminar de las escamas de los peces de agua dulce de España, a nivel de familiaExito reproductor del Buitre leonado (Gyps fulvus) en NavarraAlimentación del Gavilán (Accipiter nisus) en la Isla de TenerifeEl Verdecillo (Serinus serinus): Tendencias en la estación de nidificación, en el tamaño del huevo y en la supervivencia.las batidas como método de censo en especiesde caza mayor: aplicación al caso del Jabalí (Sus scrofa L.) en la provincia de Burgos (Norte de España)La adquisición de madurez sexual en el camaleón común (Chamaeleo chamaeleon)Nuevas citas de Hemidactylus turcicus en la provincia de CáceresLa focha común (Fulica atra) en la isla de Gran Canaria: nueva especie nidificante en el archipiélago CanarioTraslado de huevos en incubación por la urraca (Pica pica)Predación de Falco peregrinus sobre Oryctolagus cuniculusCuatro nuevas especies de aves para Bolivia.Sobre la utilización de nidos de golondrina común abandonados.Parasitismo múltiple del críalo (Clamator glandarius)Predación del topo de rio (Galemys pyrenaicus, Geoffroy 1811) por parte de la lechuza común (Tyto alba, Scopoli 1769)Predación del zorro (Vulpes vulpes) sobre un pollo de buitre leonado (Gyps fulvus).Vulpes vulpes L. criando en una colonia de marmota (Marmota marmota L.) en el pirineo de LéridaObservaciones sobre la incidencia de Rattus (Fischer, 1803) en los cultivos ibéricos de caña de azúcaSituación actual de la jutiita de la tierra Capromys sanfelipensis (Rodentia, Mammalia)Notas sobre la intraducción y expansión de la ardilla común en Sierra Nevada, sureste de EspañaPeer reviewe

    The avoidance of G-CSF and the addition of prophylactic corticosteroids after autologous stem cell transplantation for multiple myeloma patients appeal for the at-home setting to reduce readmission for neutropenic fever

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    Autologous stem cell transplantation (ASCT) remains the standard of care for young multiple myeloma (MM) patients; indeed, at-home ASCT has been positioned as an appropriate therapeutic strategy. However, despite the use of prophylactic antibiotics, neutropenic fever (NF) and hospital readmissions continue to pose as the most important limitations in the outpatient setting. It is possible that the febrile episodes may have a non-infectious etiology, and engraftment syndrome could play a more significant role. The aim of this study was to analyze the impact of both G-CSF withdrawal and the addition of primary prophylaxis with corticosteroids after ASCT. Between January 2002 and August 2018, 111 MM patients conditioned with melphalan were managed at-home beginning +1 day after ASCT. Three groups were established: Group A (n = 33) received standard G-CSF post-ASCT; group B (n = 32) avoided G-CSF post-ASCT; group C (n = 46) avoided G-CSF yet added corticosteroid prophylaxis post-ASCT. The incidence of NF among the groups was reduced (64%, 44%, and 24%; P2 (OR 6.1; P = 0.002) and G-CSF avoidance plus corticosteroids (OR 0.1; P<0.001); and for hospital readmission: age �60 years (OR 14.6; P = 0.04) and G-CSF avoidance plus corticosteroids (OR 0.07; P = 0.05. G-CSF avoidance and corticosteroid prophylaxis post ASCT minimize the incidence of NF in MM patients undergoing at-home ASCT. This approach should be explored in a prospective randomized clinical trial

    A deletion and a duplication in distal 22q11.2 deletion syndrome region. Clinical implications and review

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    <p>Abstract</p> <p>Background</p> <p>Individuals affected with DiGeorge and Velocardiofacial syndromes present with both phenotypic diversity and variable expressivity. The most frequent clinical features include conotruncal congenital heart defects, velopharyngeal insufficiency, hypocalcemia and a characteristic craniofacial dysmorphism. The etiology in most patients is a 3 Mb recurrent deletion in region 22q11.2. However, cases of infrequent deletions and duplications with different sizes and locations have also been reported, generally with a milder, slightly different phenotype for duplications but with no clear genotype-phenotype correlation to date.</p> <p>Methods</p> <p>We present a 7 month-old male patient with surgically corrected ASD and multiple VSDs, and dysmorphic facial features not clearly suggestive of 22q11.2 deletion syndrome, and a newborn male infant with cleft lip and palate and upslanting palpebral fissures. Karyotype, FISH, MLPA, microsatellite markers segregation studies and SNP genotyping by array-CGH were performed in both patients and parents.</p> <p>Results</p> <p>Karyotype and FISH with probe N25 were normal for both patients. MLPA analysis detected a partial <it>de novo </it>1.1 Mb deletion in one patient and a novel partial familial 0.4 Mb duplication in the other. Both of these alterations were located at a distal position within the commonly deleted region in 22q11.2. These rearrangements were confirmed and accurately characterized by microsatellite marker segregation studies and SNP array genotyping.</p> <p>Conclusion</p> <p>The phenotypic diversity found for deletions and duplications supports a lack of genotype-phenotype correlation in the vicinity of the LCRC-LCRD interval of the 22q11.2 chromosomal region, whereas the high presence of duplications in normal individuals supports their role as polymorphisms. We suggest that any hypothetical correlation between the clinical phenotype and the size and location of these alterations may be masked by other genetic and/or epigenetic modifying factors.</p

    Dendritic cell deficiencies persist seven months after SARS-CoV-2 infection

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    Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV)-2 infection induces an exacerbated inflammation driven by innate immunity components. Dendritic cells (DCs) play a key role in the defense against viral infections, for instance plasmacytoid DCs (pDCs), have the capacity to produce vast amounts of interferon-alpha (IFN-α). In COVID-19 there is a deficit in DC numbers and IFN-α production, which has been associated with disease severity. In this work, we described that in addition to the DC deficiency, several DC activation and homing markers were altered in acute COVID-19 patients, which were associated with multiple inflammatory markers. Remarkably, previously hospitalized and nonhospitalized patients remained with decreased numbers of CD1c+ myeloid DCs and pDCs seven months after SARS-CoV-2 infection. Moreover, the expression of DC markers such as CD86 and CD4 were only restored in previously nonhospitalized patients, while no restoration of integrin β7 and indoleamine 2,3-dyoxigenase (IDO) levels were observed. These findings contribute to a better understanding of the immunological sequelae of COVID-19

    Four Dimensions of Journalistic Convergence: A preliminary approach to current media trends at Spain

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    Convergence is a very polysemous concept that has been used to describe various trends in journalism that have something in common: the blurring of the limits between different media, professional skills and roles. This paper proposes to analytically structure convergence into four dimensions: integrated production, multiskilled professionals, multiplatform delivery and active audience. This analytical grid can help in exploring convergence avoiding deterministic assumptions and allowing to map its development in different media companies as an open process with diverse outcomes. A sample of 58 Spanish cases is studied using the conceptual framework. Multiplatform delivery is the most popular convergence strategy, and in any given dimension developments tend not to radically change established professional routines and values. Integration and multiskilling dimensions seem to be closely related and mainly developed in local and regional media with small staffs. Delivery and audience strategies are more complex in national media

    Role of age and comorbidities in mortality of patients with infective endocarditis

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    [Purpose]: The aim of this study was to analyse the characteristics of patients with IE in three groups of age and to assess the ability of age and the Charlson Comorbidity Index (CCI) to predict mortality. [Methods]: Prospective cohort study of all patients with IE included in the GAMES Spanish database between 2008 and 2015.Patients were stratified into three age groups:<65 years,65 to 80 years,and ≥ 80 years.The area under the receiver-operating characteristic (AUROC) curve was calculated to quantify the diagnostic accuracy of the CCI to predict mortality risk. [Results]: A total of 3120 patients with IE (1327 < 65 years;1291 65-80 years;502 ≥ 80 years) were enrolled.Fever and heart failure were the most common presentations of IE, with no differences among age groups.Patients ≥80 years who underwent surgery were significantly lower compared with other age groups (14.3%,65 years; 20.5%,65-79 years; 31.3%,≥80 years). In-hospital mortality was lower in the <65-year group (20.3%,<65 years;30.1%,65-79 years;34.7%,≥80 years;p < 0.001) as well as 1-year mortality (3.2%, <65 years; 5.5%, 65-80 years;7.6%,≥80 years; p = 0.003).Independent predictors of mortality were age ≥ 80 years (hazard ratio [HR]:2.78;95% confidence interval [CI]:2.32–3.34), CCI ≥ 3 (HR:1.62; 95% CI:1.39–1.88),and non-performed surgery (HR:1.64;95% CI:11.16–1.58).When the three age groups were compared,the AUROC curve for CCI was significantly larger for patients aged <65 years(p < 0.001) for both in-hospital and 1-year mortality. [Conclusion]: There were no differences in the clinical presentation of IE between the groups. Age ≥ 80 years, high comorbidity (measured by CCI),and non-performance of surgery were independent predictors of mortality in patients with IE.CCI could help to identify those patients with IE and surgical indication who present a lower risk of in-hospital and 1-year mortality after surgery, especially in the <65-year group
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