264 research outputs found

    Revisiting the determinacy on New Keynesian Models

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    The goal of this paper is to shed light on the determinacy question that arises in New Keynesian models as result of a combination of several monetary policy rules; in these models, we provide conditions to guarantee existence and uniqueness of equilibrium by means of results that are obtained from theoretical analysis. In particular, we show that Taylor--like rules in interest rate setting are not the only way to reach determinacy of the rational expectations equilibrium in the New Keynesian setting. The key technical tool that we use for that purposes is the so--called Budan--Fourier Theorem, that we review along the paper.Comment: 16 pages, comments are welcom

    Mainstreaming remotely sensed ecosystem functioning in ecological niche models

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    Part of this work was funded by the EU H2020 Project 641762 ‘ECOPOTENTIAL: Improving Future Ecosystem Benefits through Earth Observations’, from which many valuable thoughts originated. A.R. was funded by the Xunta de Galicia (post‐doctoral fellowship ED481B2016/084‐0) and currently by ‘Juan de la Cierva’ fellowship program funded by the Spanish Ministry of Science and Innovation (IJC2019‐041033‐I). J.G. was funded by the Individual Scientific Employment Stimulus Program (2017) by the Portuguese Foundation for Science and Technology (FCT CEECIND/02331/2017/CP1423/CT0012). S.A‐C was funded by the PORBIOTA ‐ Portuguese e‐Infrastructure for Information and Research on Biodiversity (POCI‐01‐0145‐FEDER‐022127) project grant and is currently supported by the 'María Zambrano' program funded by the Spanish Ministry of Universities and the EU‐NextGenerationEU fund.Biodiversity is declining globally at unprecedented rates. Ecological niche models (ENMs) are one of the most widely used toolsets to appraise global change impacts on biodiversity. Here, we identify a variety of advantages of incorporating remotely sensed ecosystem functioning attributes (EFAs) into ENMs. The development of ENMs that explicitly incorporate ecosystem functioning will allow a more holistic and integrative perspective of the habitat dynamics. The synergies between the increasingly available open-access satellite images and cloud-based platforms for planetary-scale geospatial analysis offer an unprecedented opportunity to incorporate ecosystem processes and disturbances (such as fires, insect outbreaks or droughts) that have been so far largely neglected in ecological niche characterization and modelling. The most paradigmatic example of EFAs is the application of time series of spectral vegetation indices related to primary productivity and carbon cycle. EFAs related to surface energy balance and water cycles derived from remote sensing products such as land surface temperature or soil moisture enable a fine-scale characterization of the species' niche—eventually improving the predictive performance of ENMs. All these advantages confirm that a new generation of ENMs based on such EFAs would offer great perspectives to increase our ability to monitor habitat suitability trends and population dynamics. However, despite the technical advances and increasing effort of remote sensing community to develop integrative EFAs, ENMs have yet to make full profit of the most recent developments by integrating them in ENMs. A coordinated agenda for remote sensing experts and ecological modellers will be essential over the coming years to bridge the gap between remote sensing and ecology disciplines and to take full (and timely) advantage of the fast-growing body of Earth observation data and remote sensing technologies—with special emphasis on the development and testing of new variables related to key processes driving ecosystem functioning.EU H2020 641762Individual Scientific Employment Stimulus ProgramSpanish Ministry of Universitiese‐Infrastructure for Information and Research on BiodiversityFundação para a Ciência e a TecnologiaMinisterio de Ciencia e InnovaciónFundació Catalana de Trasplantament CEECIND/02331/2017/CP1423/CT0012, POCI‐01‐0145‐FEDER‐022127Xunta de Galicia ED481B2016/084‐

    Inusual apropiación de nido y pichones por parte de la Paloma Torcaza (<i>Zenaida auriculata</i>)

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    Reportamos un caso de apropiación interespecífica de nido en donde una Torcaza (Zenaida auriculata) usurpa el nido de un Zorzal Chalchalero (Turdus amaurochalinus). Ambos pichones, incluido un pichón parásito de cría, resultaron muertos tras la usurpación, a pesar de los enérgicos esfuerzos de los zorzales por recuperar el nido y de los repetidos intentos de la paloma para alimentar los pichones. Creemos que la Torcaza perdió sus propios pichones cerca del nido de zorzal y esto motivó la usurpación. Atribuimos el falso reconocimiento de los pichones a un subproducto hormonal causado por la pérdida de sus propios pichones, similar a lo observado en el Pingüino Emperador (Aptenodytes fosteri).We report a case of interspecific nest appropriation by the Eared Dove (Zenaida auriculata) on a nest of the Creamy‐bellied Thrush (Turdus amaurochalinus). The usurpation attempt resulted in the death of both nestlings, including a parasitic cowbird, despite forceful attempts by the thrushes to retake their nest and repeated attempts by the dove to feed the nestlings. We believe that the loss of the dove offspring from a nest in a neighboring tree could have triggered this behavior, which may be a hormonal byproduct caused by the recent loss of their own offspring, similar to what has been observed in Emperor Penguins (Aptenodytes fosteri).Facultad de Ciencias Naturales y Muse

    First record of Crataegus monogyna Jacq. (Rosales: Rosaceae) in Buenos Aires province, Argentina

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    Crataegus monogyna Jacq. (Rosales: Rosaceae) is cited and collected for the first time for Buenos Aires province, Argentina. Its distribution is extended within Argentina and southern South America, since it was only known from Río Negro and Neuquén provinces in southern Argentina until nowFacultad de Ciencias Naturales y Muse

    Nesting biology of the Narrow-billed Woodcreeper (<i>Lepidocolaptes angustirostris</i>) in a southern temperate forest of central-east Argentina

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    We present data on the nesting biology of the Narrow-billed Woodcreeper (Lepidocolaptes angustirostris) in a natural forest in central-east Argentina. A total of 18 nests were found during four breeding seasons (2015–2019; from September to January), located in cavities (natural, artificial and woodpecker cavities). The incubation period lasted 16 days and eggs were larger than those from northern populations. Nestlings stayed in the nest for 17 days and we could measure nestlings at two nests. Within the forest, nests were built in large native trees. Seven nests were successful, nine were depredated and two were abandoned. The average nest daily survival rate (DSR) was estimated as 0.96, giving a cumulative chance of nest survival in a nesting cycle of 24%. Our study provides the first estimate of the nest DSR for the species and new records on the nesting biology of a poorly known Neotropical bird.Facultad de Ciencias Naturales y Muse

    Analysis of Teachers’ Intercultural Sensitivity Levels in Multicultural Contexts

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    Societies comprise multiple cultures, meaning that di erent cultural perceptions exist and that intercultural sensitivity is seen as an indicator of successful intercultural relations. The aim of this research is to establish the intercultural sensitivity levels of teachers in two multicultural cities. The sample consists of 190 teachers in primary education in the autonomous cities of Ceuta and Melilla and 174 primary teachers of Malaga and Granada, which makes a total sample of 364 teachers. The scale used in this research is an abridged version of the Intercultural Sensitivity Scale: relational engagement, regard for cultural diversity, relational certainty, relational satisfaction, and relational carefulness. The scale has been validated on many occasions in the abridged and unabridged versions. The results show that teachers in Melilla and Ceuta show high levels of cultural sensitivity. There are significant di erences depending on the variables analysed and depending on the context. Interaction enjoyment and interaction attentiveness have the highest levels for teachers in this research

    Inusual apropiación de nido y pichones por parte de la Paloma Torcaza (<i>Zenaida auriculata</i>)

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    Reportamos un caso de apropiación interespecífica de nido en donde una Torcaza (Zenaida auriculata) usurpa el nido de un Zorzal Chalchalero (Turdus amaurochalinus). Ambos pichones, incluido un pichón parásito de cría, resultaron muertos tras la usurpación, a pesar de los enérgicos esfuerzos de los zorzales por recuperar el nido y de los repetidos intentos de la paloma para alimentar los pichones. Creemos que la Torcaza perdió sus propios pichones cerca del nido de zorzal y esto motivó la usurpación. Atribuimos el falso reconocimiento de los pichones a un subproducto hormonal causado por la pérdida de sus propios pichones, similar a lo observado en el Pingüino Emperador (Aptenodytes fosteri).We report a case of interspecific nest appropriation by the Eared Dove (Zenaida auriculata) on a nest of the Creamy‐bellied Thrush (Turdus amaurochalinus). The usurpation attempt resulted in the death of both nestlings, including a parasitic cowbird, despite forceful attempts by the thrushes to retake their nest and repeated attempts by the dove to feed the nestlings. We believe that the loss of the dove offspring from a nest in a neighboring tree could have triggered this behavior, which may be a hormonal byproduct caused by the recent loss of their own offspring, similar to what has been observed in Emperor Penguins (Aptenodytes fosteri).Facultad de Ciencias Naturales y Muse

    UNUSUAL NEST AND NESTLING APPROPRIATION BY THE EARED DOVE (ZENAIDA AURICULATA)

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    Abstract ∙ We report a case of interspecific nest appropriation by the Eared Dove (Zenaida auriculata) on a nest of the Creamy‐bellied Thrush (Turdus amaurochalinus). The usurpation attempt resulted in the death of both nestlings, including a parasitic cowbird, despite forceful attempts by the thrushes to retake their nest and repeated attempts by the dove to feed the nestlings. We believe that the loss of the dove offspring from a nest in a neighboring tree could have triggered this behavior, which may be a hormonal byproduct caused by the recent loss of their own offspring, similar to what has been observed in Emperor Penguins (Aptenodytes fosteri).Resumen ∙ Inusual apropiación de nido y pichones por parte de la Paloma Torcaza (Zenaida auriculata) Reportamos un caso de apropiación interespecífica de nido en donde una Torcaza (Zenaida auriculata) usurpa el nido de un Zorzal Chalchalero (Turdus amaurochalinus). Ambos pichones, incluido un pichón parásito de cría, resultaron muertos tras la usurpación, a pesar de los enérgicos esfuerzos de los zorzales por recuperar el nido y de los repetidos intentos de la paloma para alimentar los pichones. Creemos que la Torcaza perdió sus propios pichones cerca del nido de zorzal y esto motivó la usurpación. Atribuimos el falso reconocimiento de los pichones a un subproducto hormonal causado por la pérdida de sus propios pichones, similar a lo observado en el Pingüino Emperador (Aptenodytes fosteri)

    Inusual apropiación de nido y pichones por parte de la Paloma Torcaza (<i>Zenaida auriculata</i>)

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    Reportamos un caso de apropiación interespecífica de nido en donde una Torcaza (Zenaida auriculata) usurpa el nido de un Zorzal Chalchalero (Turdus amaurochalinus). Ambos pichones, incluido un pichón parásito de cría, resultaron muertos tras la usurpación, a pesar de los enérgicos esfuerzos de los zorzales por recuperar el nido y de los repetidos intentos de la paloma para alimentar los pichones. Creemos que la Torcaza perdió sus propios pichones cerca del nido de zorzal y esto motivó la usurpación. Atribuimos el falso reconocimiento de los pichones a un subproducto hormonal causado por la pérdida de sus propios pichones, similar a lo observado en el Pingüino Emperador (Aptenodytes fosteri).We report a case of interspecific nest appropriation by the Eared Dove (Zenaida auriculata) on a nest of the Creamy‐bellied Thrush (Turdus amaurochalinus). The usurpation attempt resulted in the death of both nestlings, including a parasitic cowbird, despite forceful attempts by the thrushes to retake their nest and repeated attempts by the dove to feed the nestlings. We believe that the loss of the dove offspring from a nest in a neighboring tree could have triggered this behavior, which may be a hormonal byproduct caused by the recent loss of their own offspring, similar to what has been observed in Emperor Penguins (Aptenodytes fosteri).Facultad de Ciencias Naturales y Muse

    The effect of age on brain insulin signalling

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    Tesis Doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Biología Molecular. Fecha de lectura: 14-07-2017Esta tesis tiene embargado el acceso al texto completo hasta el 14-07-201
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