Browsing by Author "Fuentes, Rodrigo"

Now showing 1 - 8 of 8
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    A systemic approach to money demand modeling
    (2008) Calani, Mauricio; Fuentes, Rodrigo; Schmidt-Hebbel, Klaus
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    Case-Control Study of Risk Factors for Meningococcal Disease in Chile
    (2017) Olea, Andrea; Matute, Isabel; González, Claudia; Delgado, Iris; Poffald, Lucy; Pedroni, Elena; Alfaro, Tania; Hirmas, Macarena; Nájera, Manuel; Ferreccio Readi, Catterina; Gormaz, Ana; López, Darío; Loayza, Sergio; Gallegos, Doris; Fuentes, Rodrigo; Vial, Pablo; Aguilera, Ximena
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    Combining remote sensing and field data to assess recovery of the Chilean Mediterranean vegetation after fire: Effect of time elapsed and burn severity
    (2022) Smith-Ramirez, Cecilia; Castillo-Mandujano, Jessica; Becerra, Pablo; Sandoval, Nicole; Fuentes, Rodrigo; Allende, Rosario; Acuna, Maria Paz
    It has been debated if Chilean sclerophyllous vegetation can recover after fire of different severity and short and long term. We evaluated the resiliency of this vegetation type after single-occurrence fires of different severities that occurred 30, 20 and 10 years in Central Chile before the study. Two approaches were followed: satellite image analysis and vegetation sampling. Wildfires that occurred between 1985 and 2015 were identified based on Landsat images. We selected 30 sites burned by a single fire in either 1985, 1995 or 2005, and that was not converted to another land use by 2015, then determined the percentage cover by vegetation type. We recorded or estimated the independent variables of burn severity, slope, altitude, pre-fire vegetation type and latitude of the sites. Composition, richness, and abundance of adult and regeneration of woody vegetation and herbaceous cover were sampled. Generalized linear models were used to evaluate the effect of the independent variables and the time elapsed since the fire on vegetation recovery. The proportion of dense vegetation forest cover was significantly higher with more time elapsed since the fire, while semi-dense forest/shrubland and open shrubland vegetation cover returned to pre-fire levels more quickly. The richness and abundance of regenerated woody species was significantly greater with more time elapsed since the fire. However, no relationship was found between species richness and abundance of adult woody species and time elapsed post-fire. We found that vegetative recovery over time was not related to burn severity. Forested and mixed forest/shrubland cover is reached 10-20 years after the fire, if no further intervention occurs. Richness and species abundance was similar to that of unburned sites after 20 or more years post-fire. This study provided evidence that forest vegetation in the Chilean Mediterranean ecosystem is resilient to fires of at least low and medium intensities.
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    Development paths and dynamic comparative advantages: when leamer met solow
    (2007) Fuentes, Rodrigo; Mies, Verónica
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    Recovery of Chilean Mediterranean vegetation after different frequencies of fires
    (2021) Smith-Ramirez, Cecilia; Castillo-Mandujano, Jessica; Becerra, Pablo; Sandoval, Nicole; Allende, Rosario; Fuentes, Rodrigo
    Post-fire recovery of sites in the Chilean Mediterranean vegetation were evaluated 20-30 years after the last fire. We mapped all fires that occurred between 1985 and 2015 in Central Chile using Landsat images. In order to conduct a spatial analysis of vegetation recovery and field sample, we chose sites burned between 1985 and 1995 that retained native vegetation and cover until 2015. In a sampled of these sites, richness and abundance of woody vegetation, and herbaceous richness were recorded. We contrasted our results from field sampling with control (unburned) sites at the species level. Generalized linear models (GLM) were used to evaluate the relationship between the percentage of vegetation recovered with fire frequency, pre-fire cover, topographic and geographic factors. In addition, GLM were used to evaluate the effects of fire frequency on species richness, abundance, and cover. We found that the proportion of dense and semi-dense vegetation cover were similar in sites burned once and twice, and higher than sites burned three times. Besides, the proportion of dense and semidense vegetation cover were higher in lower elevation sites, in those with higher slopes, and far from population centers. The richness and abundance of adult woody species, richness of regeneration and richness of native herbs, were greater in sites that had lesser fire frequency. Mean species richness of native herbaceous species decreased as fire frequency increased, exotic herbaceous cover had no relation with fire frequency, and both native and exotic herbaceous cover were greater at driest latitudes but were not related to fire frequency. Mean species richness after one fire was higher than in unburned sites, but some plant species were found only at unburned sites. We conclude that the Mediterranean vegetation of Chile is able to regenerate to pre-fire conditions after one and two fires, but three consecutive fires reduced its cover, richness and abundance, even 20 years after the fire.
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    Trade Reforms and Manufacturing Industry in Chile
    (2003) Álvarez, Roberto; Fuentes, Rodrigo
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    Whooping cough dynamics in Chile (1932–2010) : disease temporal fluctuations across a north-south gradient
    (2015) Lima Arce, Mauricio; Estay, Sergio A.; Fuentes, Rodrigo; Rubilar, Paola; Broutin, Hélène; Chowell Puente, Gerardo; Lima Arce, Mauricio; Estay, Sergio A.; Fuentes, Rodrigo; Rubilar, Paola; Broutin, Hélène; Chowell Puente, Gerardo