General Hydrography of the Beagle Channel, a Subantarctic Interoceanic Passage at the Southern Tip of South America

The Beagle Channel (BC) is a long and narrow interoceanic passage (∼270 km long and 1–12 km wide) with west-east orientation and complex bathymetry connecting the Pacific and Atlantic oceans at latitude 55°S. This study is the first integrated assessment of the main oceanographic features of the BC, using recent oceanographic observations from cruises, moored instruments and historical observations. The waters transported into the BC are supplied mainly by the Cape Horn Current, which carries Subantarctic Water (SAAW) at depth (100 m below surface) along the Pacific Patagonian continental shelf break. SAAW enters the continental shelf via a submarine canyon at the western entrance of the BC. The SAAW is diluted by fresh, nutrient depleted (nitrate, phosphate and silicic acid) Estuarine Water (EW) from Cordillera Darwin Ice Field (CDIF) forming modified SAAW (mSAAW). Freshwater inputs from the CDIF generate a two-layer system with a sharp pycnocline which delimits the vertical distribution of phytoplankton fluorescence (PF). Two shallow sills (<70 m) along the BC contribute to EW and mSAAW mixing and the homogenization of the entire water column east of the sills, coherent with Bernoulli aspiration. The central section of the BC, extending ∼100 km toward the east, is filled by a salty (31–32) variety of EW. In winter, this central section is nearly vertically homogeneous with low nutrient concentrations (0.9–1.1 μM PO4 and 7.5–10 μM NO3) and PF. The temporal variability of seawater temperature from 50 to 195 m in the central section of the BC was found to be mostly dominated by the annual and semiannual cycles and influenced by tidal forcing. The middle section of the BC was less influenced by oceanic inputs and its basin-like structure most likely favors retention, which was observed from the weakly stratified water column at the mooring site. Toward the east, the central section bathymetry is disrupted at Mackinlay Strait where another shallow sill separates the middle channel from the shallow eastern entrance that connects to the Atlantic Ocean. In this section, a weakly stratified two-layer system is formed when the eastward surface outflow (salty-EW) flows over a deeper, denser tongue of oceanic mSAAW.Fil: Giesecke Astorga, Claudio Ricardo. Universidad Austral de Chile; ChileFil: Martín de Nascimento, Jacobo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; ArgentinaFil: Piñones, Andrea. Universidad Austral de Chile; ChileFil: Höfer, Juan. Pontificia Universidad Católica de Valparaíso; ChileFil: Garcés Vargas, Jose. Universidad Austral de Chile; ChileFil: Flores Melo, Elizabeth Ximena. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Alarcón, Emilio. Universidad Austral de Chile; ChileFil: Durrieu de Madron, Xavier. Centre National de la Recherche Scientifique; FranciaFil: Bourrin, François. Centre National de la Recherche Scientifique; FranciaFil: González, Humberto E.. Universidad Austral de Chile; Chil

Protecting stable biological nomenclatural systems enables universal communication: A collective international appeal.

peer reviewedThe fundamental value of universal nomenclatural systems in biology is that they enable unambiguous scientific communication. However, the stability of these systems is threatened by recent discussions asking for a fairer nomenclature, raising the possibility of bulk revision processes for "inappropriate" names. It is evident that such proposals come from very deep feelings, but we show how they can irreparably damage the foundation of biological communication and, in turn, the sciences that depend on it. There are four essential consequences of objective codes of nomenclature: universality, stability, neutrality, and transculturality. These codes provide fair and impartial guides to the principles governing biological nomenclature and allow unambiguous universal communication in biology. Accordingly, no subjective proposals should be allowed to undermine them

Análisis medidas de adaptación al cambio climático Ciudad de Málaga: área de trabajo: Arroyo Jaboneros

Máster en planificación urbana y sostenibilidad. Taller Final de Máster: Expo Málaga, una oportunidad para conseguir una ciudad más sostenible y resilient

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"Institut pour la ville en mouvement. 2019-2020" -- CobertaTextos en castellà i francèsDescripció del recurs: 4 maig 202

Hydrography of the Beagle Channel (CTD data)

This study is the first integrated assessment of the main oceanographic features of the Beagle Channel, using data from several oceanographic cruises conducted between 19-25 October 2016, 19-26 July 2017 and 18-23 July 2018 by the IDEAL center (Research Center: Dynamics of High Latitude Marine Ecosystems). During 2016 transects were done between the NW entrance of the Beagle Channel up to Yendegaia bay (mid of the channel). In winter 2017, simultaneous to the IDEAL transect, a full oceanographic survey onboard M/O Bernardo Houssay (PNA, Argentina) by researchers of CADIC (Austral Center for Scientific Research in Ushuaia) was conducted from nearby Yendegaia bay to the eastern limit of the Beagle Channel (27-30 August 2017), thus closing for the first time a full, high resolution, hydrographic section along the entire Channel. During 18-23 July 2018 the NW branch and the SW branch of the Beagle Channel was surveyed. The study was funded by the IDEAL center (https://www.centroideal.cl/, award: FONDAP 15150003)

Hydrography of the Beagle Channel (mooring data)

This study is the first integrated assessment of the main oceanographic features of the Beagle Channel, using data from several oceanographic cruises and a mooring. This dataset derives from an oceanographic mooring installed in the center of the Beagle Channel close to Yendegaia bay. This mooring included hourly temperature measurements at 50 m and 195 m between 21 July 2017 and 28 September 2019, while temperature at 100 m was recorded from 21 July 2017 to 19 July 2018 only. The study was funded by the IDEAL center (Research Center: Dynamics of High Latitude Marine Ecosystems, https://www.centroideal.cl/, award: FONDAP 15150003)

Protecting stable biological nomenclatural systems enables universal communication: A collective international appeal.

The fundamental value of universal nomenclatural systems in biology is that they enable unambiguous scientific communication. However, the stability of these systems is threatened by recent discussions asking for a fairer nomenclature, raising the possibility of bulk revision processes for "inappropriate" names. It is evident that such proposals come from very deep feelings, but we show how they can irreparably damage the foundation of biological communication and, in turn, the sciences that depend on it. There are four essential consequences of objective codes of nomenclature: universality, stability, neutrality, and transculturality. These codes provide fair and impartial guides to the principles governing biological nomenclature and allow unambiguous universal communication in biology. Accordingly, no subjective proposals should be allowed to undermine them

Els Casots (Subirats, Catalonia), a key site for the Miocene vertebrate record of Southwestern Europe

Altres ajuts: CERCA Programme/Generalitat de CatalunyaEls Casots is one of the richest fossil vertebrate sites of the Vallès-Penedès Basin (Catalonia, Spain). It was discovered in 1989 and excavated briefly during the 1990s, resulting in the recovery of thousands of remains and the erection of several new mammal species. Excavations were resumed in 2018 and continue to date. Here we provide updated results regarding the age, stratigraphy, biota and palaeoenvironment of the site. The age of the site is well constrained to ~15.9 Ma thanks to recent bio- and magnetostratigraphic data, thus coinciding with the Miocene Climatic Optimum (MCO). The stratigraphic succession at the site area indicates lacustrine to palustrine environments with cyclically oscillating water level. There are several fossiliferous layers that have yielded a vertebrate fauna comprising up to 75 different vertebrate species including amphibians, reptiles, birds and mostly mammals. The finding of several articulated partial skeletons indicate that the site records an autochthonous to parautochthonous assemblage. The abundance and completeness of the vertebrate remains together with a well-constrained age and detailed stratigraphic and palaeoenvironmental data, make els Casots a key site for understanding wetland ecosystems in southern Europe during the MCO

Antropologías hechas en Ecuador. El quehacer antropológico (Volumen IV)

Al igual que en otros países, en Ecuador la antropología no es solo una disciplina, son varias genealogías que obedecen a temas diversos con enfoques interdisciplinarios y que cambian de acuerdo al contexto social, económico y político; pero a diferencia de la región, registra pocas escuelas de antropología y centros de formación de profesionales en el área. Esta recopilación de textos muestra la diversidad y las múltiples facetas de las antropologías ecuatorianas. La antropología ecuatoriana no se agota en estas historiografías y resalta aquellas genealogías del pensamiento ecuatoriano, nutrido por reflexiones desde las escuelas clásicas de la antropología, que dialogan fuertemente con el contexto nacional y que, particularmente, tienen la capacidad de recrearse a la luz de las necesidades reales de la gente con quienes se co-construye el conocimiento

Els Casots (Subirats, Catalonia), a key site for the Miocene vertebrate record of Southwestern Europe

discovered in 1989 and excavated briefly during the 1990s, resulting in the recovery of thousands of remains and the erection of several new mammal species. Excavations resumed in 2018 and continue to date. Here we provide updated results regarding the age, stratigraphy, biota and palaeoenvironment of the site. The age of the site is well constrained to ~15.9 Ma thanks to recent bio- and magnetostratigraphic data, thus coinciding with the onset of the Miocene Climatic Optimum (MCO). The stratigraphic succession at the site area indicates lacustrine to palustrine environments with cyclically oscillating water level. There are several fossiliferous layers that have yielded a vertebrate fauna comprising up to 74 different vertebrate species including amphibians, reptiles, birds and mostly mammals. The finding of several articulated partial skeletons indicate that the site records an autochthonous to parautochthonous assemblage. The abundance and completeness of the vertebrate remains together with a well-constrained age and detailed stratigraphic and palaeoenvironmental data, make els Casots a key site for understanding wetland ecosystems in southern Europe during the MCO