Luis EA Letelier-GálvezUniversity of Talca · Instituto de Ciencias Biológicas
Luis EA Letelier-Gálvez
Doctor en Ciencias Biológicas
About
51
Publications
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Introduction
Mis intereses Académicos son aquellos relacionados con la biología de la conservación, tanto en las zonas áridas y templadas de Chile como de América Latina; en este sentido, abordar la conservación desde la componente de diversidad genética, planificación eco-territorial y modelamiento de nicho ecológico, este ultimo no solo para ver las condiciones climáticas actuales que permiten el desarrollo de las especies, sino también en escenarios de cambio climático pasado y futuro.
Additional affiliations
February 2011 - present
March 2006 - August 2008
March 2006 - December 2010
Education
March 2006 - August 2008
March 1998 - August 2005
Publications
Publications (51)
• Premise of the study: Microsatellite primers were developed for the endemic Chilean tree Quillaja saponaria (Quillajaceae), a common member of the sclerophyllous Mediterranean forest, to investigate intraspecific patterns of genetic diversity and
structure.
• Methods and Results: Using an enriched library, 12 polymorphic microsatellite loci were...
This study analyses and compares the genetic signatures of anagenetic and cladogenetic speciation in six species of the genus Robinsonia (Asteraceae, Senecioneae), endemic to the Juan Fernández Islands, Chile.
Population genetic structure was analyzed by amplified fragment length polymorphism ( AFLP ) and microsatellite (simple sequence repeat, SSR...
Premise of the study:
Anagenesis (or phyletic evolution) is one mode of speciation that occurs in the evolution of plants on oceanic islands. Of two endemic species on the Juan Fernández Islands (Chile), Myrceugenia fernandeziana and M. schulzei (Myrtaceae), believed to have originated anagenetically from different continental progenitors, the fir...
Background: Chile is committed to extending its National System of Protected Areas (NSPA), focusing on eco-regions whose ecosystems are currently under-represented in the NSPA. A newly proposed law aims to create a Service of Biodiversity and Protected Areas that would unify the terrestrial and marine systems. The proposed law would allow the inclu...
Background: Myrcianthes coquimbensis is an endangered shrub endemic to Chile. No published account is known about its biology, ecology or threats to its continued existence. Aims: To document the current state of knowledge of M. coquimbensis regarding its geographic distribution, and population and reproductive parameters, and to evaluate threats i...
The Limarí valley, located in the Coquimbo Region of Chile, is an important agricultural area that is immersed in the transverse valleys of the Norte Chico. In recent decades, the continuous expansion of agriculture towards dry land zones has favored the migration and establishment of potential pests, such as arthropods, that may affect crops or be...
Patterns of genetic and phylogeographic structure and recent population history of plant species in the Mexican arid zones have been scarcely investigated. Prosopis laevigata is the most widely spread species of mesquite in Mexico, with extensive populations in the arid and semiarid zones of the central and northern plateaus and scattered presence...
Balsamocarpon brevifolium Clos (Fabaceae), an endangered endemic shrub of the Chilean Atacama Desert, nowadays occurs in fragmented populations, which are exploit since at least 200 years. Understanding its genetic diversity, population structure and distribution patterns are essential for conservation planning and sustainable management. Based on...
The Limarí River valley has considerable value in terms of agricultural production within the Norte Chico. The expansion of crop monocultures in recents years has increased biological vulnerabilities, such as the number of economically important arthropods that are considered pests and zoonotic agents. Based on the review of historical data, collec...
The Limarí River valley, located in the Coquimbo Region of Chile, is an important area for agricultural production that pertains to the transverse valleys ecoregion, known as Norte Chico. In recent decades, the continuous expansion of agriculture towards the dryland areas has favored the introduction and establishment of potential pests, such as ar...
Se evalúa la perdida de hábitat para diferentes especies del género Quercus en el estado de Michoacán de Ocampo, en diferentes escenarios de cambio climático.
Sclerophyllous forest is among the most representative types of woody plant communities in central Chile where Quillaja saponaria is considered to be one of the most important species. In this study, we analysed the main factors that explain the geographical patterns of variation in composition, richness and phylogenetic diversity of woody plant co...
The genus Rhaphithamnus (Verbenaceae) consists of two species, one in South America and another endemic to the Juan Fernández archipelago, Chile. The genus represents an example of anagenetic speciation in which the island populations have diverged from their colonizing ancestors to the point where they are recognized as a distinct species. The isl...
Oceanic islands provide many opportunities for examining modes of speciation in endemic plants, especially using modern molecular methods. Most speciation has been by either cladogenesis, usually resulting in radiated complexes, or anagenesis, yielding single transformed species. Previous genetic studies with available molecular markers, representi...
Adaptive radiation is a common mode of speciation among plants endemic to oceanic islands. This pattern is one of cladogenesis, or splitting of the founder population, into diverse lineages in divergent habitats. In contrast, endemic species have also evolved primarily by simple transformations from progenitors in source regions. This is anagenesis...
A common mode of speciation in oceanic islands is by anagenesis, wherein an immigrant arrives and through time transforms by mutation, recombination, and drift into a morphologically and genetically distinct species, with the new species accumulating a high level of genetic diversity. We investigate speciation in Drimys confertifolia, endemic to th...
Mediante la revisión de material de referencia, literatura y prospecciones entomológicas se documentó la composición taxonómica del orden Orthoptera para las provincias biogeográficas de Atacama y Coquimbo y se estableció la distribución espacial de sus especies en relación a las formaciones vegetales descritas para dichas provincias. Se registró l...
By means of reference material and literature reviews, as well as entomological surveys, we documented the taxonomic composition of the order Orthoptera within the biogeographic provinces of Atacama and Coquimbo, and identified the relationships between the spatial distribution of species and the plant formations described from these provinces. We...
Heterozygote deficiencies in natural populations of outbreeding tree species are common and thought to be due mainly to biparental inbreeding. Inbreeding is believed to be caused by family structure within populations, a product of limited seed dispersal and probably limited pollen dispersal. Although both theory and simulation studies predict that...
Se evaluó el nicho climático de 8 especies arbóreas endémicas de Chile (i.e., Beilschmiedia berteroana, B. miersii, Crinodendron patagua, Cryptocarya alba, Kageneckia oblonga, Lithraea caustica, Peumus boldus y Quillaja saponaria) formadoras del Bosque Esclerófilo Mediterráneo. Se utilizó el algoritmo de Máxima Entropía (MAXENT), con los datos de p...
Heterozygote deficiencies in natural populations of outbreeding tree species are common and thought to be due mainly to biparental inbreeding. Inbreeding is believed to be caused by family structure within populations, a product of limited seed dispersal and probably limited pollen dispersal. Although both theory and simulation studies predict that...
Se evaluó el nicho climático de 8 especies arbóreas endémicas de Chile (i.e., Beilschmiedia berteroana, B. miersii, Crinodendron patagua, Cryptocarya alba, Kageneckia oblonga, Lithraea caustica, Peumus boldus y Quillaja saponaria) formadoras del Bosque Esclerófilo Mediterráneo. Se utilizó el algoritmo de Máxima Entropía (MAXENT), con los datos de p...
The concentration of Cd, Cr and Pb in the following species Ameghinomya antiqua, Aulacomya atra and Mytilus chilensis, bivalves from Iloca, Constitución and Pelluhue, coastal towns located in the Maule Region, Chile was determined. Representative tissue samples of each species were analysed by using atomic absorption spectroscopy with flame. Valida...
The Cu, Cr and Pb concentrations were determined in Mugil cephalus and Eleginops maclovinus, fish species inhabiting the mouths of the Maule and Mataquito Rivers (Maule Region, Chile) which are consumed by the coastal population in large quantities. Measurements were taken by flame atomic absorption spectroscopy to analyse representative muscle tis...
The Cu, Cr and Pb concentrations were determined in Mugil cephalus and Eleginops maclovinus, fish species inhabiting the mouths of the Maule and Mataquito Rivers (Maule Region, Chile) which are consumed by the coastal population in large quantities. Measurements were taken by flame atomic absorption spectroscopy to analyse representative muscle tis...
Gomortega keule (Molina) Baillon is a rare Chilean species classified as endangered and currently under conservation. Currently, conservation of this species is carried out by private companies and government agencies, but is done so based more on pragmatic criteria than scientifically based strategies. In this context, information concerning the g...
La Región de Atacama está en el límite norte de uno de los 34 “Hotspots” de biodiversidad a nivel mundial. La flora total nativa (980 especies) e introducida naturalizada (119 especies) de esta región, comprende poco más del 19% de las especies presentes en la flora de Chile Continental. El 54,3% de las especies nativas son endémicas de Chile. Las...
La Región de Atacama tiene 980 especies de plantas vasculares nativas, de las cuales el 9,6% se encuentra en las categorías En Peligro (EP) o Vulnerable (VU). Este porcentaje de especies con problemas de conservación aumenta a cerca del 27% si se incluye a las especies Insuficientemente Conocidas de las subcategoría potencialmente Extintas (IC(EX?)...
La planificación de conservación de la biodiversidad requiere integrar variables socioeconómicas a los procesos de selección de sitios prioritarios. Las soluciones óptimas para la Región de Atacama fueron calculadas incluyendo un costo de conservación para cada unidad de planificación. Este costo base se compone de 4 variables: densidad de caminos,...
La Región de Atacama posee actualmente una superficie protegida dentro del Sistema Nacional de Áreas Silvestres Protegidas del Estado (SNASPE) cercana al 1,7% de la superficie regional (1,8% al incluir el Área Marina y Costera Protegida (AMCP) Isla Grande de Atacama). Considerando todos los sitios de protección de la biodiversidad que han sido prop...
Se describen las principales características de los 28 sitios prioritarios para la conservación de la flora amenazada de la Región de Atacama, los que complementan las actuales áreas protegidas de Atacama. Se entregan antecedentes de ubicación, superficie, propiedad de la tierra, número de especies con problemas de conservación y número total de es...
Se entregan las definiciones conceptuales y una descripción general de la metodología utilizada para establecer los estados de conservación a nivel regional de la flora nativa de Atacama. Además se listan los valores por especies que tomó cada índice.
El cultivo ex situ de Pteris chilensis Desv. a partir de esporas es presentado. La germinación de las esporas ocurre a los 10-12 días y el patrón de germinación es del tipo Vittaria. Un gametófito filamentoso de 3-4 células es obtenido a los 23-24 días, logrando su desarrollo adulto entre los 60 a 95 días. Este se caracteriza por ser cordiforme y c...
The ex situ culture by spores of Pteris chilensis Desv. is presented. The germination of spores occurred after 10-12 days, having the pattern of germination as Vittaria type. A filamentous gametophyte of 3-4 cells is formed after 23-24 days; reaching the mature developing between 60-95 days. The cordiform gametophyte shows two symmetrical wings. Th...
Entre el 16 y 19 de enero de 2006, en el Campus Lircay de la Universidad de Talca, se llevará a cabo la XVII Reunión Anual de la Sociedad de Botánica de Chile, ocasión en que se inaugurará la primera etapa del Jardín Botánico de la Universidad.
