312 research outputs found
The value of transhumance for biodiversity conservation: Vulture foraging in relation to livestock movements
Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature.In recent decades, intensive techniques of
livestock raising have flourished, which has largely
replaced traditional farming practices such as
transhumance. These changes may have affected
scavengers’ behaviour and ecology, as extensive
livestock is a key source of carrion. This study evaluates
the spatial responses of avian scavengers to the seasonal
movements of transhumant herds in south-eastern Spain.
We surveyed the abundance of avian scavengers and
ungulates, and analysed the factors affecting the space use
by 30 GPS-tracked griffon vultures (Gyps fulvus). Griffons’
foraging activity increased in the pasturelands occupied by
transhumant herds, which implied greater vulture
abundance at the landscape level during the livestock
season. In contrast, facultative scavengers were more
abundant without transhumant livestock herds, and the
abundance of wild ungulates did not change in relation to
livestock presence. We conclude that fostering
transhumance and other traditional farming systems, to
the detriment of farming intensification, could favour
vulture conservation.CRUE-CSICSpringer Natur
18 años de gobiernos panistas en Jalisco: siete ensayos académicos
Tras seis décadas de que el Partido Revolucionario Institucional (PRI) gobernó a México como partido hegemónico, la democratización en el país ha sido objeto de estudio en distintos niveles. Este proceso comenzó en los gobiernos locales, pero aún es reducido el número de investigaciones que documentan la evolución en este plano.
Esta obra aborda el caso de Jalisco, uno de los primeros estados en donde el PRI cedió el poder. Aconteció en 1995, cuando perdió la gubernatura frente al Partido Acción Nacional (PAN), que la retuvo por 18 años, para luego cederla de nuevo al partido tricolor. Lo acontecido en estos tres sexenios se reconstruye a través de siete ensayos, en los que se presentan las características de los gobiernos panistas y los avances y retrocesos en la entidad durante las administraciones blanquiazules en el ámbito económico y social, en materia de control y trasparencia de la información, así como de su relación con la prensa y con la sociedad civil.
La transición política en Jalisco se repitió a escala federal, por lo que la lectura de los textos que conforman esta obra contribuye a entender mejor el complejo fenómeno de la democratización en México.ITESO, A.C
El Mirador cave (Sierra de Atapuerca, Burgos, Spain): a whole perspective
The archaeological site of El Mirador is located in the southern slope of the Sierra de Atapuerca. The work developed at the site is providing a substantial set of data from the Upper Palaeolithic and Early Neolithic to the Middle Bronze Age. Throughout at least about 4000 years of occupation, the cave was used for various activities, among which, burial, habitation and animal stalling. The practices related with this last use is, at the moment, the main origin of the archaeological deposits, which are mainly composed by burnt animal dung with vegetal residues, potsherds, lithics and faunal remains. In addition, it is characterized by high sedimentation rates that have enabled an individual and clear record of different episodes, providing high resolution chronological data. Due to these particularities, specific excavation methodology and interdisciplinary studies of the archaeological data have been developed in order to understand the genesis of this archaeological sequence and, at the same time, to provide information about the introduction and development of the production economy in the Submeseta Norte region.The Ministerio de Ciencia e Innovación (N_CGL2009-12703-C03-02/BTE; HAR200801984/HIST) and the Ministerio de Economía y Competitividad (CGL2012-38434-C0303; HAR2013-41197-P) and the Generalitat de Catalunya (2014SGR900; 2014SGR899) supported this research. Funding for the fieldwork came from the Consejería de Cultura y Turismo of the Junta de Castilla y León and the Atapuerca Foundation. Á. Carrancho research was funded by the Spanish Ministry of Economy and Competitiveness (MINECO) and European Regional Development Fund (FEDER) with projects CGL2012-32149 and CGL2012-3848
Beta decay of the Tz=-2 nucleus 64Se and its descendants
International audience; The beta decay of the Tz=-2 nucleus 64Se has been studied in a fragmentation reaction at RIKEN-Nishina Center. 64Se is the heavies Tz=-2 nucleus that decays to bound states in the daughter nucleus and the heaviest case where the mirror reaction 64Zn(3He,t)64Ga on the Tz=+2 64Zn stable target exists and can be compared. Beta-delayed gamma and proton radiation is reported for the 64Se and 64As cases. New levels have been observed in 64As, 64Ge (N=Z), 63Ge and 63Ga. The associated T1/2 values have been obtained
Enhanced nuclear protein export in premature aging and rescue of the progeria phenotype by modulation of CRM1 activity
The study of Hutchinson–Gilford progeria syndrome (HGPS) has provided important clues to decipher mechanisms underlying aging. Progerin, a mutant lamin A, disrupts nuclear envelope structure/function, with further impairment of multiple processes that culminate in senescence. Here, we demonstrate that the nuclear protein export pathway is exacerbated in HGPS, due to progerin‐driven overexpression of CRM1, thereby disturbing nucleocytoplasmic partitioning of CRM1‐target proteins. Enhanced nuclear export is central in HGPS, since pharmacological inhibition of CRM1 alleviates all aging hallmarks analyzed, including senescent cellular morphology, lamin B1 downregulation, loss of heterochromatin, nuclear morphology defects, and expanded nucleoli. Exogenous overexpression of CRM1 on the other hand recapitulates the HGPS cellular phenotype in normal fibroblasts. CRM1 levels/activity increases with age in fibroblasts from healthy donors, indicating that altered nuclear export is a common hallmark of pathological and physiological aging. Collectively, our findings provide novel insights into HGPS pathophysiology, identifying CRM1 as potential therapeutic target in HGPS
Six hundred years of South American tree rings reveal an increase in severe hydroclimatic events since mid-20th century
South American (SA) societies are highly vulnerable to droughts and pluvials, but lack of long-term climate observations severely limits our understanding of the global processes driving climatic variability in the region. The number and quality of SA climate-sensitive tree ring chronologies have significantly increased in recent decades, now providing a robust network of 286 records for characterizing hydroclimate variability since 1400 CE. We combine this network with a self-calibrated Palmer Drought Severity Index (scPDSI) dataset to derive the South American Drought Atlas (SADA) over the continent south of 12°S. The gridded annual reconstruction of austral summer scPDSI is the most spatially complete estimate of SA hydroclimate to date, and well matches past historical dry/wet events. Relating the SADA to the Australia–New Zealand Drought Atlas, sea surface temperatures and atmospheric pressure fields, we determine that the El Niño–Southern Oscillation (ENSO) and the Southern Annular Mode (SAM) are strongly associated with spatially extended droughts and pluvials over the SADA domain during the past several centuries. SADA also exhibits more extended severe droughts and extreme pluvials since the mid-20th century. Extensive droughts are consistent with the observed 20th-century trend toward positive SAM anomalies concomitant with the weakening of midlatitude Westerlies, while low-level moisture transport intensified by global warming has favored extreme rainfall across the subtropics. The SADA thus provides a long-term context for observed hydroclimatic changes and for 21st-century Intergovernmental Panel on Climate Change (IPCC) projections that suggest SA will experience more frequent/severe droughts and rainfall events as a consequence of increasing greenhouse gas emissions
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Adaptación cultural al español del instrumento de evaluación de funcionalidad física en Unidad de Paciente Crítico: “The Chelsea Critical Care Physical Assessment Tool (CPAx)”
Las Unidades de Cuidados Intensivos (UCI), presentan una
sobrevida cada vez mayor de los pacientes que ingresan a ellas,
donde se ven enfrentados a una nueva entidad fisiopatológica
llamada Debilidad Muscular Adquirida en UCI (DAUCI).
Algunos test desarrollados para la evaluación de función motriz,
que permiten objetivar la progresión del paciente, son la escala
de fuerza muscular del Medical Research Council (MRC), el
Functional status score for the intensive care unit (FSS-ICU) y
el “Chelsea Critical Care Physical Assessment Tool (CPAx). La ventaja del CPAx radica en que este test incluye mayor información
asociada al funcionamiento humano como recomienda la OMS,
incorporando tanto el componente ventilatorio (que también se ve
deteriorado por DAUCI) como neuromuscular lo que permite
al profesional kinesiólogo tener una herramienta objetiva más
completa del nivel funcional del paciente.
Para que sea confiable, todo test debe ser validado en el país donde
quiere aplicarse, pero antes de esto debe ser adaptado culturalmente.
El objetivo de este trabajo fue efectuar la adaptación transcultural
(AT) al español del test de funcionalidad física de aplicación
kinésica CPAx. Se utilizó el proceso establecido por Beaton y cols
que incluye la formación de un comité de expertos multidisciplinario
que da una visión integral a la adaptación y una prueba piloto en
que kinesiólogos de UCI sin capacitación previa del test lo lean,
posteriormente lo apliquen y entreguen sus observaciones.
Conclusiones: Realizar la AT permite dimensionar la importancia
que tiene cada una de las etapas de este proceso. El test es el mismo,
equivalente al original, pero contiene nuestras características
culturales y condiciones técnicas, que lo hace ser comprensible y
aplicable en nuestro país. Esta adaptación transcultural también
es útil a nivel latinoamericano; para los países de habla hispana
que quieran validarlo tenerlo adaptado al español, hace el proceso
menos complejo.
Palabras clave: Evaluación funcional, Unidad de cuidados
intensivos, CPAx, adaptación transcultural
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