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Laberinto
(Universidad de La Serena. Vinculación con el Medio, 2024) Torres, Vicente Editor y Representante; Sanhueza, Rafaela Colectivo Laberinto; Areválo Diego Colectivo Laberinto; Contreras, Héctor Colectivo Laberinto; Rojas, Anto Colectivo Laberinto; Caloguerea, Tokyo Colectivo Laberinto
La Revista Laberinto es una publicación literaria estudiantil que busca promover y difundir la creatividad y el talento artístico de jóvenes escritores y poetas. Con una estructura que incluye poesía, narrativa y apartados lúdicos, la revista combina estilos contemporáneos con un enfoque experimental. Creada por el Colectivo Laberinto, destaca por su espíritu colaborativo e inclusivo, reflejando una amplia diversidad de voces y perspectivas. Cada ejemplar se presenta como un espacio para la exploración de emociones, ideas y relatos, ofreciendo una plataforma única para el desarrollo cultural y literario estudiantil.
El Saber Campesino: El conocimiento de la experiencia en la construcción de los territorios
(Universidad de La Serena. Vinculación con el Medio, 2024-07-10)
El Seminario “El Saber Campesino: El conocimiento de la experiencia en la construcción de los territorios” se llevó a cabo en el marco de la primera actividad de la Cátedra Raúl Bitrán Nachary de la Universidad de La Serena. Este encuentro tuvo como objetivo principal promover la discusión y reflexión en torno a la relación entre la experiencia y la ciencia, destacando la temática central: “La Experiencia y la Ciencia: ¿Conocimientos confrontados o complementados en la comprensión de los territorios rurales?”.
Con el apoyo de la Universidad de La Serena, la Universidad Metropolitana de Ciencias de la Educación (UMCE) y la Asociación de Municipalidades Rurales del Norte Chico, este evento congregó a dirigentes de diversas comunas de la Región de Coquimbo, incluyendo Combarbalá, Illapel, Canela, Los Vilos, Río Hurtado, Paihuano, Andacollo, Salamanca, Vicuña, La Higuera, La Serena, Coquimbo, Ovalle y Monte Patria.
Participantes y Temáticas
La actividad contó con la participación de destacados académicos y autoridades, entre ellos:
Diego Pinto, geógrafo y Magíster en Educación de la Universidad de Chile, académico de la UMCE.
Héctor Reyes Serrano, ingeniero agrónomo y Doctor en Gestión, Desarrollo y Medio Ambiente, académico del Departamento de Agronomía de la Universidad de La Serena y director alterno del laboratorio PROMMRA.
Asimismo, dirigentes campesinos y autoridades locales valoraron este espacio como una oportunidad única para integrar el saber campesino en la construcción de políticas públicas y en la promoción de la investigación participativa.
Proyecto Territorio ULS
Esta iniciativa se enmarca dentro del Proyecto Territorio ULS, el cual busca fomentar la vinculación entre la academia y las comunidades rurales mediante la colaboración con cooperativas y organizaciones productivas, artísticas y culturales, consolidando un modelo de investigación participativa en la región.
A melting-pot for Pterodroma petrels on Rapa Nui: ecological divergence and reproductive isolation in a contact zone
(FRONTIERS MEDIA SA, 2023/07/27) Plaza Paula, Cristofari Robin, Gouin Nicolas, Soto-Gamboa Mauricio, Luna-Jorquera Guillermo
Speciation is thought to depend on general ecological segregation rather than on strict allopatry in species with planetary-scale foraging ranges, such as Pterodroma petrels. Separation in both breeding islands and foraging grounds are generally considered to be the conditions for prezygotic isolation. However, it is unclear how both can be maintained in a context of ongoing distributional range shifts due to global change, with range contractions and expansions caused by changing land use in breeding territories and oceanographic conditions impacting productivity areas. In this context, we expect that wherever the fragile balance of allopatric segregation breaks down, gene flow may be re-established across the borders of what is currently considered separated species. In these melting pot areas, fine-scale ecological differentiation is likely the only force opposing panmixia in otherwise highly similar organisms. In this study, we focus on six Polynesian Pterodroma species currently found on Motu Nui, a protected islet offshore of Rapa Nui (Easter Island), four of which have likely extended their breeding range to that island recently. To understand the fine-scale interaction between these closely-related species in their new contact zone, we used an integrative approach combining ecological and genetic methods, including morphometric, bioacoustics, stable isotope niche reconstruction, breeding site characterisation, phenology traits, and both nuclear and mitochondrial DNA markers. We found that significant amounts of gene flow occur across what is currently considered species boundaries, sometimes questioning the relevance of the accepted species classification. Interestingly, our results indicate that multivariate ecological distance between individuals in a group of closely related species (P. alba, P. atrata, P. heraldica, and P. neglecta) is a relevant predictor of gene flow intensity, while more distant species such as P. ultima and P. nigripennis seem to maintain reproductive isolation. Thus, the case of Pterodroma petrels supports the idea that incomplete allopatric speciation processes may be halted or even reversed on a secondary contact zone. Beyond their direct taxonomical relevance, our results underline the importance of considering fine ecological structures for biodiversity mapping and conservation policies.
Diversification trajectories and paleobiogeography of Neogene chondrichthyans from Europe
(CAMBRIDGE UNIV PRESS, 2023/05/01) Villafana Jaime A. A., Rivadeneira Marcelo M. M., Pimiento Catalina, Kriwet Juergen
Despite the rich fossil record of Neogene chondrichthyans (chimaeras, sharks, rays, and skates) from Europe, little is known about the macroevolutionary processes that generated their current diversity and geographical distribution. We compiled 4368 Neogene occurrences comprising 102 genera, 41 families, and 12 orders from four European regions (Atlantic, Mediterranean, North Sea, and Paratethys) and evaluated their diversification trajectories and paleobiogeographic patterns. In all regions analyzed, we found that generic richness increased during the early Miocene, then decreased sharply during the middle Miocene in the Paratethys, and moderately during the late Miocene and Pliocene in the Mediterranean and North Seas. Origination rates display the most significant pulses in the early Miocene in all regions. Extinction rate pulses varied across regions, with the Paratethys displaying the most significant pulses during the late Miocene and the Mediterranean and North Seas during the late Miocene and early Pliocene. Overall, up to 27% and 56% of the European Neogene genera are now globally and regionally extinct, respectively. The observed pulses of origination and extinction in the different regions coincide with warming and cooling events that occurred during the Neogene globally and regionally. Our study reveals complex diversity dynamics of Neogene chondrichthyans from Europe and their distinct biogeographic composition despite the multiple marine passages that connected the different marine regions during this time.
Conservation efforts in need of survey improvement in epigean beetles from the Atacama coast, Chile
(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD, 2023/07/01) Pizarro-Araya Jaime, Villalobos Elizabeth V., Alfaro Fermin M., Moreira-Munoz Andres
The Atacama desert's southern margin includes a poorly explored area of high biotic value with natural areas that are crucial for diversity and conservation. We used pitfall traps to study epigean beetles across 17 sites located along the coast between the Paposo Norte Natural Monument and the Paposo Priority Site. We recorded a total of 3,237 epigean beetles specimens, belonging to 26 families and 97 species. The most well represented families in terms of richness were Curculionidae and Tenebrionidae, and most of the remaining families were represented by fewer than five species. The rarefaction analysis showed that the sampling effort was low, sug-gesting the presence of a hidden and underestimated diversity in the area under study. The ordination analysis showed a clear correlation between elevation and the epigean beetles assemblage, but richness was concentrated in shrubland environments within the Paposo Priority Site and consisted of a large number of rare species (singletons) and species restricted to a few sites of this coastal strip. The high richness estimated for the study area, stress an urgent need to include these units under governmental conservation programs aimed at tackling the multiple threats identified in these fragile arid coastal ecosystems.