Valdivia, Chile
Valdivia, Chile

Austral University of Chile is a research university in Chile based in Valdivia although it has some institutions and careers in Puerto Montt. Founded by decree on 7 September 1954 it is one of the eight original Chilean Traditional Universities. Juridically it is a nonprofit self-owned corporation under private law and is significantly state-financed. Wikipedia.

Time filter

Source Type

Bravo S.,Austral University of Chile
Experimental Parasitology | Year: 2010

Gravid females of Caligus rogercresseyi were collected from Atlantic salmon (Salmo salar) from a farm located at Chiloe Island (42°40′S73°15′W), Chile, to obtain information about the reproductive output of this parasite in vitro. The egg strings removed from the females were incubated under controlled conditions to obtain virgin adult females. One female which had mated only once produced eleven generations of eggs strings in a period of 74. days. The first egg strings of the females obtained in vitro were produced at 389 degree days (°D) after egg incubation, while the next generations of eggs strings were produced with a periodicity between 4 and 6. days dependent on the water temperature. The average length of the egg string was 3.1. mm and the mean number of eggs per string was 31. The values recorded in captivity for the egg string length and the number of eggs per string, were lower than the values recorded in gravid females from the field. One female survived for 79. days and males, maintained separately from the females, survived for 60. days. © 2009 Elsevier Inc.

Paula S.,Instituto Universitario | Paula S.,Austral University of Chile
Global Ecology and Biogeography | Year: 2012

Aim To understand how vegetation mediates the interplay between fire and climate. Specifically, we predict that neither the switching of climatic conditions to high flammability nor the sensitivity of fire to such conditions are universal, but rather depend on fuel (vegetation) structure, which in turn changes with productivity. Location An aridity/productivity gradient on the Iberian Peninsula (Mediterranean Basin). Methods We defined 13 regions distributed along an aridity gradient, which thus differ in productivity and fuel structure. We then assessed the changes in the temporal fire-climate relationship across regions. Specifically, for each region we estimated three variables: the aridity level for switching to flammable conditions (i.e. climatic conditions conducive to fire), the frequency of these flammable conditions and the area burnt under such conditions. These variables were then related to regional aridity and fuel structure indicators. Results In mediterranean ecosystems, the aridity level for switching to flammable conditions increased along the aridity gradient. Differences in fire activity between regions were not explained by the frequency of flammable conditions but by the sensitivity of fire to such conditions, which was higher in wetter and more productive regions. Main conclusions Under mediterranean climatic conditions, fuel structure is more relevant in driving fire activity than the frequency of climatic conditions conducive to fire. At a global scale, fuel also drives the fire-climate relationship because it determines the climatic (aridity) threshold for switching to flammable conditions. Our results emphasize the role of landscape structure in shaping current and future fire-climate relationships at a regional scale, and suggest that future changes in the fire regime (i.e. under global warming) might be different from what it is predicted by climate alone. © 2012 Blackwell Publishing Ltd.

Adler P.B.,Utah State University | Fajardo A.,Austral University of Chile | Kleinhesselink A.R.,Utah State University | Kraft N.J.B.,University of Maryland University College
Ecology Letters | Year: 2013

Recent functional trait studies have shown that trait differences may favour certain species (environmental filtering) while simultaneously preventing competitive exclusion (niche partitioning). However, phenomenological trait-dispersion analyses do not identify the mechanisms that generate niche partitioning, preventing trait-based prediction of future changes in biodiversity. We argue that such predictions require linking functional traits with recognised coexistence mechanisms involving spatial or temporal environmental heterogeneity, resource partitioning and natural enemies. We first demonstrate the limitations of phenomenological approaches using simulations, and then (1) propose trait-based tests of coexistence, (2) generate hypotheses about which plant functional traits are likely to interact with particular mechanisms and (3) review the literature for evidence for these hypotheses. Theory and data suggest that all four classes of coexistence mechanisms could act on functional trait variation, but some mechanisms will be stronger and more widespread than others. The highest priority for future research is studies of interactions between environmental heterogeneity and trait variation that measure environmental variables at within-community scales and quantify species' responses to the environment in the absence of competition. Evidence that similar trait-based coexistence mechanisms operate in many ecosystems would simplify biodiversity forecasting and represent a rare victory for generality over contingency in community ecology. © 2013 John Wiley & Sons Ltd/CNRS.

Astorga M.P.,Austral University of Chile
Frontiers in Genetics | Year: 2014

In 2012, world mollusk production in aquaculture reached a volume of 15,171,000 tons, representing 23% of total aquaculture production and positioning mollusks as the second most important category of aquaculture products (fishes are the first). Clams and oysters are the mollusk species with the highest production levels, followed in descending order by mussels, scallops, and abalones. In view of the increasing importance attached to genetic information on aquaculture, which can help with good maintenance and thus the sustainability of production, the present work offers a review of the state of knowledge on genetic and genomic information about mollusks produced in aquaculture. The analysis was applied to mollusks which are of importance for aquaculture, with emphasis on the 5 species with the highest production levels. According to FAO, these are: Japanese clam Ruditapes philippinarum; Pacific oyster Crassostrea gigas; Chilean mussel Mytilus chilensis; Blood clam Anadara granosa and Chinese clam Sinonovacula constricta. To date, the genomes of 5 species of mollusks have been sequenced, only one of which, Crassostrea gigas, coincides with the species with the greatest production in aquaculture. Another important species whose genome has been sequenced is Mytilus galloprovincialis, which is the second most important mussel in aquaculture production, after M. chilensis. Few genetic improvement programs have been reported in comparison with the number reported in fish species. The most commonly investigated species are oysters, with at least 5 genetic improvement programs reported, followed by abalones with 2 programs and mussels with one. The results of this work will establish the current situation with respect to the genetics of mollusks which are of importance for aquaculture production, in order to assist future decisions to ensure the sustainability of these resources. © 2014 Astorga.

Paliathanasis A.,Austral University of Chile
Classical and Quantum Gravity | Year: 2016

We consider f(R)-gravity in a Friedmann-Lemaître-Robertson-Walker spacetime with zero spatial curvature. We apply the Killing tensors of the minisuperspace in order to specify the functional form of f(R) and for the field equations to be invariant under Lie-Bäcklund transformations, which are linear in momentum (contact symmetries). Consequently, the field equations to admit quadratic conservation laws given by Noether's theorem. We find three new integrable f(R)-models, for which, with the application of the conservation laws, we reduce the field equations to a system of two first-order ordinary differential equations. For each model we study the evolution of the cosmological fluid. We find that for each integrable model the cosmological fluid has an equation of state parameter, in which there is linear behavior in terms of the scale factor which describes the Chevallier, Polarski and Linder parametric dark energy model. © 2016 IOP Publishing Ltd.

Mcintire E.J.B.,Natural Resources Canada | Mcintire E.J.B.,Laval University | Fajardo A.,Austral University of Chile
New Phytologist | Year: 2014

Models describing the biotic drivers that create and maintain biological diversity within trophic levels have focused primarily on negative interactions (i.e. competition), leaving marginal room for positive interactions (i.e. facilitation). We show facilitation to be a ubiquitous driver of biodiversity by first noting that all species use resources and thus change the local biotic or abiotic conditions, altering the available multidimensional niches. This can cause a shift in local species composition, which can cause an increase in beta, and sometimes alpha, diversity. We show that these increases are ubiquitous across ecosystems. These positive effects on diversity occur via a broad host of disparate direct and indirect mechanisms. We identify and unify several of these facilitative mechanisms and discuss why it has been easy to underappreciate the importance of facilitation. We show that net positive effects have a long history of being considered ecologically or evolutionarily unstable, and we present recent evidence of its potential stability. Facilitation goes well beyond the common case of stress amelioration and it probably gains importance as community complexity increases. While biodiversity is, in part, created by species exploiting many niches, many niches are available to exploit only because species create them. New Phytologist © 2013 New Phytologist Trust.

Agency: European Commission | Branch: FP7 | Program: CP-IP | Phase: ENV.2009. | Award Amount: 8.23M | Year: 2010

Fire regimes result from interactions between climate, land-use and land-cover (LULC), and socioeconomic factors, among other. These changed during the last decades, particularly around the Mediterranean. Our understanding of how they affected fire regime in the past is limited. During this century temperatures, drought and heat waves will very likely increase, and rainfall decrease. These and further socioeconomic change will affect LULC. Additional areas will be abandoned due to being unsuitable for agriculture or other uses. Fire danger and fire hazard are very likely to increase, affecting fire regimes. FUME will learn from the past to understand future impacts. Mod. 1 we will study how LULC and socioeconomics changed and how climate and weather affected fire in dynamically changing landscapes. Fires will be mapped throughout Europe to determine hazard burning functions for LULC types. Since climate has changed, an attempt to attribute (sensu IPCC) fire regime change to climate, differentiating it from socioeconomic change, will be made. Mod. 2 will produce scenarios of change (climate, including extremes, land-use land-cover, socioeconomics, vegetation) for various emissions pathways and three time-slices during this century. With these and results from Mod.1, models and field experiments projected impacts on fire-regime and vegetation vulnerabilities will be calculated, including climate extremes (drought, heat-waves). Mod. 3 will investigate adaptation options in fire- and land-management, including restoration. Fire prevention and fire fighting protocols will be tested/developed under the new conditions to mitigating fire risks. A company managing fire will be a key player. Costs and policy impacts of changes in fire will be studied. Research will focus on old and new fire areas, the rural interface, whole Europe and the Mediterranean, including all Mediterranean countries of the world. Users will be involved in training and other activities.

Agency: European Commission | Branch: H2020 | Program: MSCA-ITN-ETN | Phase: MSCA-ITN-2016 | Award Amount: 3.97M | Year: 2017

PROTECTED aims to develop expertise and protective capabilities against Endocrine Disruptors (EDs). EDs and their mixtures are a modern day health concern leading to failing ecological systems, poor agricultural production and health effects such as obesity, cancer and infertility. While analytical methods have advanced enormously, focus has been mainly on synthetic chemicals, overlooking emerging EDs and real-life multiple substance exposure. A new generation of creative, entrepreneurial and innovative early-stage researchers equipped with skills to assess and understand the real-life risk of complex mixtures of EDs and trained to convert resulting knowledge and ideas into accessible tools and services for the long-term control of potential ED risk is urgently needed. The PROTECTED Innovative Training Network [ITN] proposes a holistic approach by providing 15 individual, personalised research projects with exposure to scientific, innovative and entrepreneurial training mobility across the ITN. The intersectorial network is comprised of 12 training sites at academia, research centres, a bioassay technology SME, a QSAR technology SME, water provider, and animal feed supplier. Together they cover multiple disciplines including analytical science of food, feed, and environment, epidemiology, risk assessment, social science and toxicology. This combined expertise enables a highly focused program for developing novel tools and concepts and training for the detection, analysis and improved risk assessment of EDs, especially mixture effects. Methodology will include emerging technologies; multiplexed analysis, mixture modelling, mechanistic and exposure studies, explants and cell or whole organism bioassays. The project will provide a unique and high level of training for a new generation of specialists with transferable skills and enhanced career perspectives. These specialists will ultimately aid the efficient development of future control strategies for improved health.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: INT-12-2015 | Award Amount: 2.42M | Year: 2016

The EU-LAC-MUSEUMS project directly meets the challenge of fostering EU-CELAC relations by studying the close connections between Europe and Latin America and the Caribbean (LAC) in the field of community museology. To address this challenge, EU-LAC-MUSEUMS assembles a team of leading academics, museum professionals and policy makers elected by the European and LAC Regional Alliances of the International Council of Museums (ICOM) ( Together, we are committed to exploring the cultural, scientific and social dimensions of EU-LAC relations with a view to supporting the process of EU-CELAC cooperation outlined by the EU-CELAC Action Plan 2013-2015 in defining a common vision for the years to come. Through a series of thematic work packages we will pursue the theme of Museums and Community: Concepts, Experiences, and Sustainability in Europe, Latin America and the Caribbean. A good deal of research has been carried out into this subject at local, national, and regional levels in both EU and LAC, but a concerted bi-regional investigation is yet to appear. EU-LAC-MUSEUMS will overcome this gap in knowledge by creating parity of esteem and sustainable dialogue and co-operation between academia, museums and communities in each region. It will achieve this goal by pursuing work packages dealing with the cross cutting societal challenges of: a) Technology and Innovation for Bi-Regional Integration; b) Museum Education for Social Inclusion and Cohesion; c) Investment and Entrepreneurship for Sustainable Museums, and d) Exhibiting Migration and Gender. In so doing, we will push forward the agenda of the EU-CELAC Action Plan in museum practice and theory.

Agency: European Commission | Branch: FP7 | Program: CP | Phase: ENV.2013.6.1-1 | Award Amount: 9.35M | Year: 2013

The marine food web is at the centre of both the climate-related CO2 cycle and food production in the marine environment. It plays a key role in regulating the climate system and is highly sensitive to climate change and other stressors. OCEAN-CERTAIN will investigate the impact of climatic and non climatic stressors on the food web and the connected biological pump , and the important feedback mechanisms. OCEAN-CERTAIN will identify and quantify multi-stressor impacts and feedbacks and how these alter the functionality and structure of the food web and efficiency of the biological pump in different bio-geographical regions. This will be done by utilizing existing ecosystem models employing existing data, in addition to mesocosm, lab-scale experiments and field study. . The resulting knowledge will then be used to assess socio-economic vulnerabilities and adaptive capacity by using indicators of food-web functions as responses to particular changes by way of stressor combinations. OCEAN-CERTAIN will then address socio-economic policy and management issues by using highly interactive participatory stakeholder workshops to create models of user group resilience and adaptability. These will show how potential climate-driven physical, chemical and biological changes may affect relevant economic activities and human welfare and help to identify adaptation pathways. This information and knowledge will reduce of epistemic uncertainty and help policy makers chose among management options, which in turn will be treated as additional feedbacks to the food web. The stressors, key feedback mechanisms and indicators, form the basis for the design of an integrated Decision Support System (DSS).

Loading Austral University of Chile collaborators
Loading Austral University of Chile collaborators