Evidence for a Warm Last Glacial Maximum in the Nordic Seas or an example of shortcomings in UK37' and UK37 to estimate low sea surface temperature?

The occurrence of ice-free conditions in the Nordic seas during the Last Glacial Maximum has been demonstrated using microfossil and biomarker approaches. An accurate picture of the prevailing oceanographic conditions may be more difficult to ascertain. Thus, uncertainties for most proxies increase at the cold extreme of temperature calibrations and glacial sediments contain small amounts of microfossils and biomarkers. Here we discuss sea surface temperature estimates derived from alkenone indices for the Last Glacial Maximum in the Nordic seas that provide a surprising scenario, where surface temperatures were warmer than at present. We conclude that the UK37' and UK37 estimates may not be interpreted in terms of sea surface temperature as several factors may have conspired to bias the molecular signal. However, using an alternative index based on the abundance of the C37∶4 alkenone, we estimate a maximum temperature of 6°C

The historical ecology of subsistence and early commercial fisheries in mangrove systems in Brazil

Human population growth and the technological advancements of the 20th and 21st centuries have significantly altered human-environment interactions and led to unprecedented anthropogenic footprints on coastal and ocean systems. Despite thousands of years of exploitation for subsistence and, later, commercial purposes, the ecology of mangrove fisheries along the Brazilian coast and the consequences of these activities remain poorly understood. This is largely due to a pervasive lack of historical baselines, and highlights the conservation crises affecting some of the world's biodiversity hotspots. In this study, we used otolith metrics and stable isotope analysis to investigate changes in the body length and trophic ecology of several demersal species recovered from pre-colonial (4500 cal BP to 1500 AD) and historical (late 19th and early 20th centuries AD) archaeological sites in Babitonga Bay, the largest mangrove system in southern Brazil. Our results revealed that pre-colonial and historical fisheries exploited a wide range of mangrove habitats, encompassing brackish to marine systems. Pre-colonial subsistence fisheries, however, targeted predominantly small and juvenile individuals in nursery areas, while early commercial fisheries targeted larger adult specimens, likely due to their higher commercial value. Our study shows that some drivers of stock overexploitation, such as the preferential capture of large and adult individuals, were found to be occurring more than 150 years ago along the southern Brazilian coast. Given the deep roots of human footprints in Brazil, our findings underscore the significance of incorporating historical data into the formulation of fisheries management strategies in subtropical and tropical regions

Documentary film in S3D: "Alburquerque Crossroads"

Stereo 3D in the opinion of many specialists is the next big step in the audiovisual media. Like the change from the silent films to sound, or from Black and white to color it is the natural evolution. This transformation lead the industry to adapt their technologies and processes to work with each new format as it emerged. Following the artists of past I have created a documentary film about the history of the city of Albuquerque to study the process of working with stereo 3D.Comes Del Mazo, P. (2011). Documentary film in S3D: "Alburquerque Crossroads". Universitat Politècnica de València. http://hdl.handle.net/10251/14643Archivo delegad

Evidence for a Warm Last Glacial Maximum in the Nordic Seas or an example of shortcomings in UK37' and UK37 to estimate low sea surface temperature?

The occurrence of ice-free conditions in the Nordic seas during the Last Glacial Maximum has been demonstrated using microfossil and biomarker approaches. An accurate picture of the prevailing oceanographic conditions may be more difficult to ascertain. Thus, uncertainties for most proxies increase at the cold extreme of temperature calibrations and glacial sediments contain small amounts of microfossils and biomarkers. Here we discuss sea surface temperature estimates derived from alkenone indices for the Last Glacial Maximum in the Nordic seas that provide a surprising scenario, where surface temperatures were warmer than at present. We conclude that the UK37' and UK37 estimates may not be interpreted in terms of sea surface temperature as several factors may have conspired to bias the molecular signal. However, using an alternative index based on the abundance of the C37∶4 alkenone, we estimate a maximum temperature of 6°C

Eufonía : didáctica de la música

Resumen basado en el de la publicaciónSe presenta una experiencia didáctica que toma el canon como eje conductor para la elaboración de un programa de radio. Se proponen una serie de actividades alrededor de los diferentes bloques de contenidos de currículo (Decreto 122/2007) para la materia de música de 4.º ESO. Se ha elegido la metodología de trabajo por grupos con el objetivo de fomentar habilidades sociales y de respeto a la diversidad.Biblioteca de Educación del Ministerio de Educación y Formación Profesional; Calle San Agustín, 5 - 3 Planta; 28014 Madrid; Tel. +34917748000; [email protected]

The historical ecology of subsistence and early commercial fisheries in mangrove systems in Brazil

Altres ajuts: acords transformatius de la UABUnidad de excelencia María de Maeztu CEX2019-000940-MHuman population growth and the technological advancements of the 20th and 21st centuries have significantly altered human-environment interactions and led to unprecedented anthropogenic footprints on coastal and ocean systems. Despite thousands of years of exploitation for subsistence and, later, commercial purposes, the ecology of mangrove fisheries along the Brazilian coast and the consequences of these activities remain poorly understood. This is largely due to a pervasive lack of historical baselines, and highlights the conservation crises affecting some of the world's biodiversity hotspots. In this study, we used otolith metrics and stable isotope analysis to investigate changes in the body length and trophic ecology of several demersal species recovered from pre-colonial (4500 cal BP to 1500 AD) and historical (late 19th and early 20th centuries AD) archaeological sites in Babitonga Bay, the largest mangrove system in southern Brazil. Our results revealed that pre-colonial and historical fisheries exploited a wide range of mangrove habitats, encompassing brackish to marine systems. Pre-colonial subsistence fisheries, however, targeted predominantly small and juvenile individuals in nursery areas, while early commercial fisheries targeted larger adult specimens, likely due to their higher commercial value. Our study shows that some drivers of stock overexploitation, such as the preferential capture of large and adult individuals, were found to be occurring more than 150 years ago along the southern Brazilian coast. Given the deep roots of human footprints in Brazil, our findings underscore the significance of incorporating historical data into the formulation of fisheries management strategies in subtropical and tropical regions