Techno-Typological Analysis of Lithic Tools from Ipilla 2 an Early Archaic Site in the Andes of Arica, Chile

El estudio de la tecnología lítica en los Andes se inició con la identificación tipológica de puntas de proyectil para definir secuencias cronológico-culturales de sociedades de cazadores recolectores. Análisis tecno-tipológicos como el que se presenta en este trabajo, tratan de mostrar que las morfologías de instrumentos líticos no son estáticas pues varían de acuerdo a su uso, mantenimiento y reciclaje. En este estudio, exploramos y caracterizamos la variabilidad morfológica del instrumental lítico del sitio Ipilla 2, un campamento abierto del Arcaico Temprano (9.670-9.541 cal. a.p.), ubicado en los Andes de Arica (3.400 msm), norte de Chile. Los resultados sugieren que los instrumentos fueron intensamente mantenidos para extender su vida útil, lo que alteró los diseños originales. Otro proceso tecnológico incluyó la manufactura secuencial de distintos filos en un mismo instrumento. Estos resultados aportan a la comprensión de los modos de vida de las sociedades de cazadores recolectores andinos y muestran que, metodológicamente, las formas tipológicas deben considerarse desde una perspectiva dinámica para convertirse en una herramienta analítica más eficaz.The study of lithic technology in the Andes began with the classification of projectile point typologies to define chronological and cultural sequences of hunter-gatherer societies. Techno-typological analysis such as the onepresented here, try to show that lithic morphologies are not static as they vary in relation to their use, maintenance and recycling. In this study we explore and characterize the technological and typological variability of stone tools from Ipilla 2, an Early Archaic open-air camp (9,670-9,541 cal. BP) located in the Andes of Arica (3,400 m asl), northern Chile. The results show that tools were intensely maintained to extend their use-life, which transformed their original designs. Another technological process included the sequential manufacture of different edges in the same instrument. These results contribute to understanding the lifestyles of Andean hunter-gatherer societies and show that methodologically, lithic typologies must be considered from a dynamic perspective to become a more effective analytic tool.Fil: Herrera, Katherine A.. Universidad de Tarapacá; ChileFil: Ugalde, Paula C.. Centro de Investigaciones del Hombre en el Desierto; ChileFil: Osorio, Daniela. Centro de Investigaciones del Hombre en el Desierto; ChileFil: Capriles Flores, Jose Mariano. Universidad de Tarapacá; ChileFil: Hocsman, Salomón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto Superior de Estudios Sociales. Universidad Nacional de Tucumán. Instituto Superior de Estudios Sociales; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto de Arqueología y Museo; ArgentinaFil: Santoro Vargas, Calogero Mauricio. Centro de Investigaciones del Hombre en el Desierto; Chile. Universidad de Tarapacá; Chil

Desde el pacífico a la foresta tropical: redes de interacción social en el desierto de atacama durante el pleistoceno final

The social groups that initially inhabited the hyper arid core of the Atacama Desert of northern Chile during the late Pleistocene integrated a wide range of local, regional and supra regional goods and ideas for their social reproduction as suggested by the archaeological evidence contained in several open camps in Pampa del Tamarugal (PdT). Local resources for maintaining their every-day life, included stone raw material, wood, plant and animal fibers, game, and fresh water acquired within a radius of ∼30 km (ca. 1-2 days journey). At a regional scale, some goods were introduced from the Pacific coast (60-80 km to the west, ca. 3-4 days journey), including elongated rounded cobbles used as hammer stones in lithic production, and shells, especially from non-edible species of mollusks. From the Andes (ranging 80-150 km to the east, ca. 5-8 days of journey), they obtained camelid fiber, obsidian and a high-quality chalcedony, in addition to sharing knowledge on projectile point designs (Patapatane and Tuina type forms). Pieces of wood of a tropical forest tree species (Ceiba spp.) from the east Andean lowlands (600 km away, ca. 30 days of journey) were also brought to the PdT. While local goods were procured by the circulation of people within the PdT, the small number of foreign items would have been acquired through some sort of exchange networks that integrated dispersed local communities throughout several ecosystems. These networks may have been a key factor behind the success exhibited by these early huntergatherers in the hyper arid ecosystems of the Atacama Desert at the end of the Pleistocene. Different lines of archaeological evidence including open camps, workshop-quarries, lithic artifacts, archaeofaunal remains, plant and animal fibers and textiles, archaeobotanical remains, and paleoecological data show that people of the PdT managed a wide range of cultural items from the Pacific coast, the Andean highland and the tropical forest, that were integrated with resources gathered locally within the socio-cultural systems established by the end of the Pleistocene. These results are interpreted as material expressions of multi-scalar networking for resource management and other social material and immaterial requirements, which in other words, means that these people were actively connected to regional (coastal and highland), and supra-regional (trans-Andean) exchange networks from and out of the PdT.Los grupos sociales que inicialmente habitaban el núcleo hiperárido del Desierto de Atacama en el norte de Chile durante el Pleistoceno tardío integraron una amplia gama de bienes e ideas, locales, regionales y supra regionales, para su reproducción social, como lo sugieren las evidencias arqueológicas materiales recuperadas en varios campamentos al aire libre en Pampa del Tamarugal (PdT). Los recursos locales para mantener su vida diaria, incluían materias primas líticas, fibras de plantas y animales, presas de caza y agua dulce adquiridos en un radio de ̴30 km (ca. 1-2 días de viaje). A escala regional, se introdujeron algunos elementos desde la costa del Pacífico (60-80 km hacia el oeste, ca. 3 a 4 días de viaje), incluidos rodados redondeados alargados, utilizados como percutores en la producción lítica y conchas, especialmente de especies no comestibles de moluscos. Desde los Andes (80-150 km al este, ca. 5-8 días de viaje), obtuvieron fibra de camélido, obsidiana y una calcedonia de alta calidad, además de compartir conocimientos sobre diseños de puntas de proyectil (tipo Patapatane y Tuina). También se llevaron a la PdT trozos de madera de una especie de árbol de los bosques tropicales (Ceiba spp.) de las tierras bajas al este de los Andes (600 km de distancia, ca. 30 días de viaje). Mientras que los bienes locales fueron adquiridos por la circulación de personas dentro de la PdT, el pequeño número de artículos foráneos se adquirieron a través de redes de intercambio que integraron comunidades locales dispersas en varios ecosistemas; lo que debió ser un factor clave detrás del éxito demostrado por estos primeros cazadores-recolectores en los ecosistemas hiperáridos del Desierto de Atacama hacia el final del Pleistoceno. Diferentes líneas de evidencia arqueológica que incluyen campamentos al aire libre, talleres, canteras, artefactos líticos, restos arqueofaunales, fibras y textiles de plantas y animales, restos arqueobotánicos y datos paleoecológicos, muestran que la gente de la PdT manejaron una amplia gama de elementos culturales desde la costa del Pacífico, el altiplano andino y el bosque tropical, que se integraron a los recursos recolectados localmente dentro de los sistemas socioculturales establecidos al final del Pleistoceno. Estos resultados se interpretan como una expresión material de una red de múltiples escalas para la gestión de recursos y otros requisitos sociales e inmateriales, lo que en otras palabras, significaría que estos grupos sociales estaban conectados activamente con redes de interacción regionales (costa y tierras altas) y supra-regionales (transandinas) desde y hacia la PdT.Fil: Santoro, Calógero M.. Universidad de Tarapaca.; ChileFil: Gayo, Eugenia M.. Centro de Ciencia del Clima y la Resiliencia; Chile. Universidad de Concepción; ChileFil: Capriles Flores, Jose Mariano. State University of Pennsylvania; Estados UnidosFil: Rivadeneira Valenzuela, Marcelo Michel. Comisión Nacional de Investigación Científica y Tecnológica. Centro de Investigación Regional. Centro de Estudios en Zonas Áridas; Chile. Universidad Católica del Norte; Chile. Universidad de La Serena; ChileFil: Herrera, Katherine A.. Universite Paris Ouest Nanterre la Defense; Francia. Universidad de Tarapaca.; ChileFil: Mandakovic, Valentina. No especifíca;Fil: Rallo, Mónica. No especifíca;Fil: Rech, Jason A.. University of Miami; Estados UnidosFil: Cases, Bárbara. Universidad de Tarapaca.; ChileFil: Briones, Luis. Museo Municipalidad de Pica; ChileFil: Olguín, Laura. Universidad Católica del Norte, San Pedro de Atacama; ChileFil: Valenzuela, Daniela. Universidad de Tarapaca.; ChileFil: Borrero, Luis Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Saavedra 15. Instituto Multidisciplinario de Historia y Ciencias Humanas; ArgentinaFil: Ugalde, Paula C.. University of Arizona; Estados Unidos. Universidad de Tarapaca.; ChileFil: Rothhammer, Francisco. Universidad de Tarapaca.; ChileFil: Latorre, Claudio. Pontificia Universidad Católica de Chile; Chile. Instituto de Ecología y Biodiversidad; ChileFil: Szpak, Paul. Trent University; Canad

Incidence of Type 2 Diabetes in Children With Nonalcoholic Fatty Liver Disease

Background & aimsType 2 diabetes (T2D) is a growing problem in children. Children with NAFLD are at potentially high risk for developing T2D; however, the incidence of T2D in this population is unknown. This study aimed to determine the incidence of T2D in children with NAFLD and identify associated risk factors.MethodsChildren with NAFLD enrolled in the Nonalcoholic Steatohepatitis Clinical Research Network were followed longitudinally. Incidence of T2D was determined by using clinical history and fasting laboratory values. Cumulative incidence curves were developed for time to T2D. A Cox regression multivariable model was constructed using best subsets Akaike's Information Criteria selection.ResultsThis study included 892 children with NAFLD and with a mean age of 12.8 years (2.7) followed for 3.8 years (2.3) with a total 3234 person-years at risk. The incidence rate of T2D was 3000 new cases per 100,000 person-years at risk. At baseline, 63 children had T2D, and during follow-up, an additional 97 children developed incident T2D, resulting in a period prevalence of 16.8%. Incident T2D was significantly higher in females versus males (hazard ratio [HR], 1.8 [1.0-2.8]), associated with BMI z-score (HR, 1.8 [1.0-3.0]), and more severe liver histology including steatosis grade (HR, 1.3 [1.0-1.7]), and fibrosis stage (HR, 1.3 [1.0-1.5]).ConclusionsChildren with NAFLD are at high risk for existing and incident T2D. In addition to known risk factors for T2D (female and BMI z-score), severity of liver histology at the time of NAFLD diagnosis was independently associated with T2D development. Targeted strategies to prevent T2D in children with NAFLD are needed

CIBERER : Spanish national network for research on rare diseases: A highly productive collaborative initiative

Altres ajuts: Instituto de Salud Carlos III (ISCIII); Ministerio de Ciencia e Innovación.CIBER (Center for Biomedical Network Research; Centro de Investigación Biomédica En Red) is a public national consortium created in 2006 under the umbrella of the Spanish National Institute of Health Carlos III (ISCIII). This innovative research structure comprises 11 different specific areas dedicated to the main public health priorities in the National Health System. CIBERER, the thematic area of CIBER focused on rare diseases (RDs) currently consists of 75 research groups belonging to universities, research centers, and hospitals of the entire country. CIBERER's mission is to be a center prioritizing and favoring collaboration and cooperation between biomedical and clinical research groups, with special emphasis on the aspects of genetic, molecular, biochemical, and cellular research of RDs. This research is the basis for providing new tools for the diagnosis and therapy of low-prevalence diseases, in line with the International Rare Diseases Research Consortium (IRDiRC) objectives, thus favoring translational research between the scientific environment of the laboratory and the clinical setting of health centers. In this article, we intend to review CIBERER's 15-year journey and summarize the main results obtained in terms of internationalization, scientific production, contributions toward the discovery of new therapies and novel genes associated to diseases, cooperation with patients' associations and many other topics related to RD research

Reconstructing a Paleoindigenous Communal Space: Living Under the Trees in the Atacama Desert, 12,800-11,200 Cal Yrs BP

For centuries the Atacama Desert in northern Chile, and particularly its hyperarid core (<2,300 masl), has been considered a marginal, uninhabitable place. In the general historic and Chilean imagination, the Atacama is a passage-way between the Andes and the Pacific coast, and a place for the extraction of minerals and salts that provide with c. 12.5% of the country’s GDP (Sernageomin, 2021). However, the Atacama is still inhabited by traditional indigenous communities that strive to continue herding and cultivating in the steep western slope of the Andes, despite the contamination and excessive consumption of water by large mining companies and cities along the coast (Santoro et al., 2018). Not only today, but also in the distant past, the Atacama reveals the presence of life. Due to improved environmental conditions and increased rainfall in the Andes, communities of people managed to make this desert their home between 12,800 and 11,200 years ago. This dissertation is devoted to understanding how these small groups of hunter-gatherers, who were part of the some of the earliest groups to populate South America, were able to access, map, understand and navigate through the core of the desert for over 1,000 years. Specifically, we focus on the relationship established between these groups of people and the trees that were highly adapted to the harsh conditions of the desert. This dissertation uses information from a wide range of sources, including ethnographic records, radiocarbon dating of old trees and archaeological material, soil and sediment analyses and stable isotope analyses of bones, hair, and soils in order to reconstruct and understand the local environments in which these early hunter-gatherers of the Atacama lived. A survey of ethnographic literature indicates that, recent hunter-gatherers in every kind of environment have established profound relationships with the nature around them, treating trees as social beings. Trees are not only important for their economic profitability but also for their shade and temperature regulation capacity, as a source of protection from wind, predators, enemies and spirits, as places for recreation, and because they provide a natural framework upon which several kinds of residences, ephemeral camps, and storage structures are created even without modifying the trees. The results of our surveys, excavations and radiocarbon dating of PaleoIndigenous sites in the Atacama indicate that, in an environment where groves were scarce, circumscribed and vital, hunter-gatherers took care of their trees. Our spatial and chronological record indicates that in at least two residential sites people preferred to live close to tamarugo trees (Strombocarpa tamarugo), which provided shade and shelter. The presence of ancient groves coincided with the placement of hearths. Our data also suggests that in one site, a grove of trees was contemporaneous and spatially coincident with human activities. Diagnostic artifact assemblages suggest the possibly two different human groups (perhaps bands) could have co-existed, congregating around the rich micro-environment provided by this grove for c. 400 years, between 11,600 and 11,200 cal yrs BP. The taxonomic identification of these tree stumps, together with the identification of wood represented as charcoal and tools, indicates that people preferred to use the second most common species (Schinus molle) or sub-fossil wood, and thus to preserve the most common tree species (S. tamarugo) as structural protection for their residential sites. A stable isotope analysis strengthens the hypothesis that at least two different groups of people were co-existing in the area and using a tree grove. The first one, that camped on site QM32, either came from the Puna (3,000 – 3,400 masl) or traveled to this ecological area, bringing with them Vicugna vicugna fiber. These animal remains display a more pronounced C4 plant consumption and higher d15N values. The second group was likely local and inhabited site QM35. These people did not use vicuña hair or any kind of fiber for cordage. In addition, bones and hair coming from QM35 and other sites, such as PR7, contain the remains of probable guanacos (Lama guanicoe) and Caviomorpha rodents, which had a more C3 rich diet and surprisingly, a lower d15N signal. Overall, this dissertation shows us how some hunter-gatherer groups became highly adapted to the hyperarid environment of the Atacama’s core, making this part of the world their permanent home. Some of the scarce biotic resources, specifically S. tamarugo trees, were tended as part of maintaining the value of residential locations. These places may even have become nuclei for the occasional convergence of different groups. Our research also suggests that more than one group of people were using the ecosystem seasonally, and in so doing perhaps establishing social networks linking the coast and highlands, to complement the patchy resources of the western Andean slope.Release after 07/05/202

Processes of Paleoindian site and desert pavement formation in the Atacama Desert, Chile

A distinct feature of many of the earliest archaeological sites (13,000-11,200 cal yr BP) at the core of the Atacama Desert is that they lie at or just below the surface, often encased in desert pavements. In this study, we compare these sites and undisturbed desert pavements to understand archaeological site formation and pavement development and recovery. Our results indicate these pavements and their soils are poorly developed regardless of their age. We propose that this is because of sustained lack of rain and extreme physical breakdown of clasts by salt expansion. Thus, the core of the Atacama provides an example of the lower limits of rainfall (<50 mm/yr) needed to form desert pavements. At site Quebrada Mani 12 (QM12), humans destroyed the pavement. After abandonment, human-made depressions were filled with eolian sands, incorporating artifacts in shallow deposits. Small and medium-sized artifacts preferentially migrated upwards, perhaps due to earthquakes and the action of salts. These artifacts, which now form palimpsests at the surface, helped - along with older clasts - to restore surface clast cover. Larger archaeological features remained undisturbed on top of a deeper Byzm horizon. The vesicular A horizons (Av horizons) have not regenerated on the archaeological sites due to extreme scarcity of rainfall during the Holocene.24 month embargo; published online by Cambridge University Press: 19 June 2020This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

13,000 years of sociocultural plant use in the Atacama Desert of northern Chile

Throughout Earth's most extreme environments, such as the Kalahari Desert or the Arctic, hunter-gatherers found ingenious ways to obtain proteins and sugars provided by plants for dietary requirements. In the hyperarid Atacama Desert, wild plant resources are scarce and unevenly distributed due to limited water availability. This study brings together all available archaeobotanical evidence gathered in the Atacama Desert from the Late Pleistocene (ca. 13,000 cal bp) until the Inka epoch (ca. 450 cal bp) to help us comprehend when these populations acquired and managed useful plants from the coastal zone, Intermediate Depression, High Andes, as well as tropical and subtropical ecosystems. Widespread introduction of farming crops, water control techniques and cultivation of diverse plants by 3,000 cal bp ended not only a chronic food shortage, but also led to the establishment of a set of staple foods for the Atacama Desert dwellers, a legacy that remains visible today. By contrasting these trends with major sociocultural changes, together with palaeodemographic and climatic fluctuations, we note that humans adapted to, and transformed this hyperarid landscape and oscillating climate, with plants being a key factor in their success. This long-term process, which we term the "Green Revolution", coincided with an exponential increase in the number of social groups inhabiting the Atacama Desert during the Late Holocene.12 month embargo; published online: 6 May 2020This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

PLEISTOCENE HUMAN OCCUPATION IN THE ATACAMA DESERT: FIRST RESULTS FROM THE APPLICATION OF AN INTERDISCIPLINARY PREDICTIVE RESEARCH MODEL

International audienceIn South America. evidence of human occupation dates back to 14,600 calibrated years BP (14.6 ka). Yet, important areas such as the Atacama Desert, between latitude 17 degrees to 21 degrees S (northern Atacama), lack occupations older than 11.5 ka. Current hyperarid conditions in the Atacama have dissuaded many researchers from considering this region as a possible territory for Pleistocene-Holocene peoples. Paleoecological data, however, have suggested increased availability of water along the western slope of the Andes from 17.5-9.5 ka. Thus, we systematically searched for rodent middens and paleowetlands in the large canyons of the Andean Precordillera as well as the interfluves (1,000-3,000 masl). As a result, we identified specific habitats favorable for early human settling. This interdisciplinary and predictive methodological model, summarized in this pope!; allowed us to identify several sites. Among these, Quebrada Mani 12 is the first Pleistocene-Holocene human occupation (similar to 11.9 a 12.7 ka) known from the northern Atacama

Late pleistocene fuel management and human colonization of the atacama desert, northern Chile

International audienceHunter-gatherers collected and used various woody species depending on the landscape, availability of plant communities, and sociocultural considerations. With extensive paleo-wetlands and groundwater-fed oases, the Atacama Desert was interspersed with riparian woodlands that provided vital resources (fuel, water, and game) at the end of the Pleistocene in areas such as the Pampa del Tamarugal (PdT) basin. We use anthracological analyses to determine the fuel management strategies of hunter-gatherer societies in this hyperarid environment and explore whether the “Principle of Least Effort” applies. First, we present the combustion qualities and characteristics of woody taxa from the Atacama and analyze possible exploitation strategies. Second, we use anthracological analyses from Quebrada Maní 12 (QM12), a late Pleistocene archaeological site (dated from 12,750 to 11,530 cal B.P.) located in the PdT basin, to show the prevalence of two woody species that were either freshly collected or gathered (very likely on purpose) from subfossil wood. Our results suggest that fuel selection strategies were based on prior knowledge of the qualities of these woody taxa and how they burned. Thus we conclude that fuel management was part of a number of social and economic decisions that allowed for effective colonization of this region. Furthermore, we stress the need for caution when using charcoal to exclusively date archaeological sites located in desert environments

Pre-hispanic consumption of psychoactive substances in northern Chile suggests early exchange networks with the central Altiplano and the Amazon region

Con el fin de contrastar la hipótesis de la existencia de una vasta red de intercambio cultural prehispánico entre la región amazónica, el altiplano central y la costa del Pacífico, se analiza la evidencia arqueológica relacionada con el consumo y uso de sustancias psicoactivas en el Norte de Chile. Se interpreta luego la evidencia registrada configurando algunas propuestas en torno a las formas de manejo y la posible farmacoterapia vinculada a su consumo, para finalmente situar esta praxis en un contexto cultural, geográfico y cronológico más específico.In order to contrast the hypothesis of the existence of a vast cultural exchange network between the Amazon Region, the Central Altiplano and the Pacific coast, the archeological evidence related to the consumption of psycho-active substances in Northern Chile is examined. The available evidence is interpreted configuring some propositions concerning the manners of handling and the possible pharmacotherapy associated to the consumption, to place this praxis in a more specific cultural geographical and chronological context