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| GUTIÉRREZ,JULIO R; MESERVE,PETER L; KELT,DOUGLAS A; ENGILIS JR,ANDREW; PREVITALI,M. ANDREA; MILSTEAD,W. BRYAN; JAKSIC,FABIAN M. |
| Since 1989, we have conducted a large-scale ecological experiment in semiarid thorn scrub of a national park in north-central Chile. Initially, we focused on the role of biotic interactions including predation, interspecific competition, and herbivory in small mammal and plant components of the community. We utilized a reductionist approach with replicated 0.56 ha fenced grids that selectively excluded vertebrate predators and/or larger small mammal herbivores such as the degu, Octodon degus. Although we detected small transitory effects of predator exclusions on degu survival and numbers, other species failed to show responses. Similarly, interspecific competition (i.e., degus with other small mammals) had no detectable numerical effects (although some... |
| Tipo: Journal article |
Palavras-chave: Birds; Chilean desert; Ephemeral plants; LTER; Small mammals. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000100005 |
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| JAKSIC,FABIAN M; IRIARTE,J. AGUSTÍN; JIMÉNEZ,JAIME E.. |
| Fifteen raptor species (Falconiformes and Strigiformes) breed and other two may breed in Torres del Paine National Park (Chilean Patagonia), the highest raptor species richness documented in Chile. Accounts for each raptor species in Torres del Paine are provided, including information on weight, habitat, diet, residence, conservation, and miscellaneous observations in the Park. We compare raptor species richness in Torres del Paine with well studied localities in central and northern Chile, and speculate on causes for the higher raptor diversity observed in the Park. Raptor macroniches in Torres del Paine are assessed, describing primarily their use of two major habitat types and nine food resources. We examine food-niche relationships for a subset of... |
| Tipo: Journal article |
Palavras-chave: Falconiformes; Strigiformes; Chile; Patagonia; Diet; Weight; Habitat use; Niche relationships. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200014 |
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| JAKSIC,FABIAN M; CASTRO,SERGIO A. |
| A partir de la revisión de la sección zoológica de la Historia Física y Política de Chile elaborada por Claude Gay, analizamos su contribución al conocimiento de los vertebrados chilenos. Esta sección incluyó la descripción de 483 especies distribuidas en 68 mamíferos, 259 aves, 31 reptiles, 16 anfibios y 109 peces; de ellas, 50 especies fueron descritas por primera vez para la ciencia, pero los análisis taxonómicos posteriores sinonimizaron cerca del 58 % de ellas, quedando como válidas solo 21 especies. Este valor implica que el 1.1 % de la fauna de vertebrados de Chile actualmente conocida (unas 1900 especies) fue descrita por primera vez en dicha obra monumental. |
| Tipo: Journal article |
Palavras-chave: Historia de la ciencia; Naturalista. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000300001 |
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