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Search Results: 1 - 10 of 3421 matches for " Federico Luebert "
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Hacia una fitogeografía histórica del Desierto de Atacama
Federico Luebert
Revista de Geografía, Norte Grande , 2011,
Abstract: El concepto de elemento florístico es fundamental en biogeografía histórica. En este trabajo se revisan los límites que han sido planteados para el Desierto de Atacama en términos florísticos, así como las relaciones fitogeográficas que diferentes autores han propuesto para el área. En un intento por identificar elementos florís-ticos en el Desierto de Atacama, Ia literatura filogenética es revisada e integrada con el conocimiento sobre la distribución de linajes presentes en el Desierto de Atacama. Cuatro elementos florísticos fueron identificados: (i) neotropical, (ii) chileno central, (iii) transandino y (iv) antitropical. Estos elementos son discutidos en el contexto de los posibles orígenes geográficos de Ia flora del Desierto de Atacama.
DATOS SOBRE LA FLORA VASCULAR DEL DESIERTO COSTERO DE ARICA Y TARAPACA, CHILE, Y SUS RELACIONES FITOGEOGRAFICAS CON EL SUR DE PERU
Pinto,Raquel; Luebert,Federico;
Gayana. Botánica , 2009, DOI: 10.4067/S0717-66432009000100004
Abstract: 156 new records for the vascular flora of the coastal desert of northern chile (18°38'- 21°20's) are reported, one of which is new for chile (tetragonia crystallina) and 23 are new distribution limits. floristic checklists of three localities of northernmost chile (cerro camaraca, punta madrid, caleta junín) are informed first time. with these new records, the vascular flora of the coastal desert of the arica - parinacota and tarapaca regions is composed of 116 species, which means the addition of 33 species with respect to the previous reports. a similarity analysis among the floristic lists of the localities under study, plus floristic information from other sites of the coastal desert of northern chile and southern peru, suggests that the floristic similarity falls brusquely between the northernmost locality of chile (cerro camaraca) and the southernmost one of peru (tacna). this result is discussed in the context of the biogeography of the pacific desert of south-america.
NOTA SOBRE LA PRESENCIA DE HELIOTROPIUM KRAUSEANUM FEDDE (HELIOTROPIACEAE) EN CHILE
Luebert,Federico; Pinto,Raquel;
Gayana. Botánica , 2004, DOI: 10.4067/S0717-66432004000200003
Abstract: the presence of heliotropium krauseanum fedde is reported near iquique in northern chile (19°37's, 70°11'o). the species had been previously collected only in perú. this report represents an important southward geographic range extension for the species, and a northward extension of the range of the section cochranea of this genus in chile
DATOS SOBRE LA FLORA VASCULAR DEL DESIERTO COSTERO DE ARICA Y TARAPACA, CHILE, Y SUS RELACIONES FITOGEOGRAFICAS CON EL SUR DE PERU DATA ON THE VASCULAR FLORA OF THE COASTAL DESERT OF ARICA AND TARAPACA, CHILE, AND ITS PHYTOGEOGRAPHICAL RELATIONSHIPS WITH SOUTHERN PERU
Raquel Pinto,Federico Luebert
Gayana. Botanica , 2009,
Abstract: Se reportan 156 nuevos registros para la flora vascular del desierto costero del norte de Chile (18°38'- 21°20'S), de los que uno es nuevo para Chile (Tetragonia crystallina) y 23 son nuevos límites de distribución. Listados florísticos de tres localidades costeras del extremo norte de Chile (cerro Camaraca, Punta Madrid, caleta Junín) son informados por primera vez. Con estos nuevos registros, la flora vascular del desierto costero de las Regiones de Arica y Parinacota, y de Tarapacá queda formada por 116 especies, lo que supone la adición de 33 especies en relación con los estudios previos. Un análisis de similitud florística entre las localidades estudiadas, junto con información proveniente de la literatura para la flora de otras localidades en el desierto costero del norte de Chile y sur de Perú, indica que la similitud florística cae abruptamente entre la localidad más septentrional de Chile (cerro Camaraca) y la más austral de Perú (Tacna). Este resultado es discutido en el contexto de la biogeografía del desierto del Pacífico de Sudamérica. 156 new records for the vascular flora of the coastal Desert of northern Chile (18°38'- 21°20'S) are reported, one of which is new for Chile (Tetragonia crystallina) and 23 are new distribution limits. Floristic checklists of three localities of northernmost Chile (cerro Camaraca, Punta Madrid, caleta Junín) are informed first time. With these new records, the vascular flora of the coastal Desert of the Arica - Parinacota and Tarapaca Regions is composed of 116 species, which means the addition of 33 species with respect to the previous reports. A similarity analysis among the floristic lists of the localities under study, plus floristic information from other sites of the coastal desert of northern Chile and southern Peru, suggests that the floristic similarity falls brusquely between the northernmost locality of Chile (cerro Camaraca) and the southernmost one of Peru (Tacna). This result is discussed in the context of the biogeography of the Pacific Desert of South-America.
NOTA SOBRE LA PRESENCIA DE HELIOTROPIUM KRAUSEANUM FEDDE (HELIOTROPIACEAE) EN CHILE NOTE ON THE PRESENCE OF HELIOTROPIUM KRAUSEANUM FEDDE (HELIOTROPIACEAE) IN CHILE
Federico Luebert,Raquel Pinto
Gayana. Botanica , 2004,
Abstract: The presence of Heliotropium krauseanum Fedde is reported near Iquique in northern Chile (19°37'S, 70°11'O). The species had been previously collected only in Perú. This report represents an important southward geographic range extension for the species, and a northward extension of the range of the section Cochranea of this genus in Chile
Phylogenetic insights into Andean plant diversification
Federico Luebert,Maximilian Weigend
Frontiers in Ecology and Evolution , 2014, DOI: 10.3389/fevo.2014.00027
Abstract: Andean orogeny is considered as one of the most important events for the development of current plant diversity in South America. We compare available phylogenetic studies and divergence time estimates for plant lineages that may have diversified in response to Andean orogeny. The influence of the Andes on plant diversification is separated into four major groups: The Andes as source of new high-elevation habitats, as a vicariant barrier, as a North-South corridor, and as generator of new environmental conditions outside the Andes. Biogeographical relationships between the Andes and other regions are also considered. Divergence time estimates indicate that high-elevation lineages originated and diversified during or after the major phases of Andean uplift (Mid-Miocene to Pliocene), although there are some exceptions. As expected, Andean mid-elevation lineages tend to be older than high-elevation groups. Most clades with disjunct distribution on both sides of the Andes diverged during Andean uplift. Inner-Andean clades also tend to have divergence time during or after Andean uplift. This is interpreted as evidence of vicariance. Dispersal along the Andes has been shown to occur in either direction, mostly dated after the Andean uplift. Divergence time estimates of plant groups outside the Andes encompass a wider range of ages, indicating that the Andes may not be necessarily the cause of these diversifications. The Andes are biogeographically related to all neighboring areas, especially Central America, with floristic interchanges in both directions since Early Miocene times. Direct biogeographical relationships between the Andes and other disjunct regions have also been shown in phylogenetic studies, especially with the eastern Brazilian highlands and North America. The history of the Andean flora is complex and plant diversification has been driven by a variety of processes, including environmental change, adaptation, and biotic interactions.
Ensayo de una tipología de estaciones forestales en el Parque Nacional Tolhuaca, Chile
GAJARDO,RODOLFO; LUEBERT,FEDERICO; ESTAY,MARLIS;
Bosque (Valdivia) , 2005, DOI: 10.4067/S0717-92002005000200007
Abstract: a typology of forest stations is established for the tolhuaca national park, chile. a forest station is a homogenous environmental unit, defined through its physical and biotical characteristics. in order to establish the typology of stations, three methodological stages were achieved, which are the definition of phytosociological and phytoecological groups and types of physical environments or biotopes. the identified phytosociological associations are distributed in the classes wintero-nothofagetea, with three associations, and nothofagetea pumilionisantarcticae, also with three associations. the results obtained with the use of the factorial analysis of correspondences, allow establishing four phytoecological groups: mesophyllous deciduous forest, with broad-leaved evergreen species; microphyllous deciduous forest; microphyllous evergreen forest and mixed microphyllous deciduous scrub, with evergreen species. the best variables for the definition of the biotopes are altitude and relief, both factors with great influence on the local climate. the studied area is located within the temperate macroclimate and the following belts were defined: colinen, lower montane and upper montane. the proposed typology of forest stations consists of fourteen units.
Ensayo de una tipología de estaciones forestales en el Parque Nacional Tolhuaca, Chile An essay on a forest stations typology in the Tolhuaca National Park, Chile
RODOLFO GAJARDO,FEDERICO LUEBERT,MARLIS ESTAY
Bosque (Valdivia) , 2005,
Abstract: Se establece una tipología de estaciones forestales para el Parque Nacional Tolhuaca, Chile. El concepto de estación forestal se refiere a una unidad ambiental homogénea, definida a través del conjunto de sus caracteres físicos y bióticos. En orden a establecer la tipología de estaciones se cumplieron tres etapas metodológicas, las cuales son: la definición de grupos fitosociológicos, grupos fitoecológicos y tipos de ambiente físico o biótopos. Los grupos fitosociológicos determinados están distribuidos en la clase Wintero-Nothofagetea, con tres asociaciones, y en la clase Nothofagetea pumilionis-antarcticae, también con tres asociaciones. Los resultados obtenidos con el uso del análisis factorial de correspondencias permiten establecer cuatro grupos fitoecológicos, correspondientes a bosque caducifolio mesófilo, con especies: laurifolias, bosque caducifolio micrófilo, bosque siempreverde micrófilo y matorral caducifolio micrófilo, con especies siempreverdes. Las mejores variables determinadas para la definición de los biótopos son altitud y relieve, ambos factores con gran influencia en el clima local. El área estudiada se ubica dentro del macroclima templado y en ella fueron definidos los siguientes pisos: colino, montano inferior y montano superior. La tipología de estaciones forestales propuesta consiste en catorce unidades. A typology of forest stations is established for the Tolhuaca National Park, Chile. A forest station is a homogenous environmental unit, defined through its physical and biotical characteristics. In order to establish the typology of stations, three methodological stages were achieved, which are the definition of phytosociological and phytoecological groups and types of physical environments or biotopes. The identified phytosociological associations are distributed in the classes Wintero-Nothofagetea, with three associations, and Nothofagetea pumilionisantarcticae, also with three associations. The results obtained with the use of the factorial analysis of correspondences, allow establishing four phytoecological groups: mesophyllous deciduous forest, with broad-leaved evergreen species; microphyllous deciduous forest; microphyllous evergreen forest and mixed microphyllous deciduous scrub, with evergreen species. The best variables for the definition of the biotopes are altitude and relief, both factors with great influence on the local climate. The studied area is located within the temperate macroclimate and the following belts were defined: colinen, lower montane and upper montane. The proposed typology of forest stations cons
Primer registro de Heliotropium amplexicaule (Heliotropiaceae) en Chile
Ibá?ez,Sergio; Luebert,Federico; Gómez,Miguel;
Gayana. Botánica , 2011, DOI: 10.4067/S0717-66432011000100009
Abstract: the presence of the commonly known weed heliotropium amplexicaule (heliotropiaceae) is reported for chile first time, from a collection recently made in santiago. its potential as weed in chile is discussed in the context of the experience of other countries where the species has become naturalised.
Primer registro de Heliotropium amplexicaule (Heliotropiaceae) en Chile First record of Heliotropium amplexicaule (Heliotropiaceae) in Chile
Sergio Ibá?ez,Federico Luebert,Miguel Gómez
Gayana. Botanica , 2011,
Abstract: The presence of the commonly known weed Heliotropium amplexicaule (Heliotropiaceae) is reported for Chile first time, from a collection recently made in Santiago. Its potential as weed in Chile is discussed in the context of the experience of other countries where the species has become naturalised.
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