Browsing by Author "Medel Contreras, Rodrigo"
Now showing items 1-20 of 39
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(BOTANICAL SOC AMER INC, 2006-07)Concerted changes in flower morphology and pollinators provide strong evidence on adaptive evolution. Schizanthus (Solanaccae) has zygomorphic flowers and consists of 12 species of annual or biennial herbs that are distributed ...
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(ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD., 2016)The avifauna of Chile is relatively depauperate, comprising 469 extant species, of which 213 are terrestrial. However, the Coquimbo Region presents a broad ecological transition from the hyperarid Atacama Desert to the ...
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(John Wiley, 2015)1. The effects of the present biodiversity crisis have been largely focused on the loss of species. However, a missed component of biodiversity loss that often accompanies or even precedes species disappearance is the ...
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(Springer-Verlag, 1988)An inferential analysis of the foraging mode (opportunist or mediate by prey selection) of a taxonomic assemblage of raptors in central Chile was conducted. The analysis of energetic aspects such as daily requirements of ...
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(ELSEVIER, 2006-07)Parasites have been shown to manipulate the feeding behaviour of their invertebrate vectors, which results in an increased probability of transmission to definitive hosts. Most evidence for this hypothesis comes from ...
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(1995)In this paper I examine the extent to which contemporary ecological patterns in 42 harvester ant assemblages of three continents can be explained as a result of present-day environments or from differences in the history ...
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(Universidad de Chile, 2021)Este trabajo se enmarca en la idea de abducción como esquema de razonamiento que facilita la creación de hipótesis y descubrimiento científico. El primer capítulo es una introducción general, que mediante la revisión de ...
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(BLACKWELL PUBLISHING, 2008-03)Parasites can reduce host fitness through short-term mortality, complete or partial castration, or slight reductions in host fecundity. Hosts may reduce reproductive effort as an adaptive strategy to tolerate parasitism. ...
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(1990)The rare Darwin's fox Dusicyon fulvipes (Martin, 1837) was thought to be restricted to Chiloé Island in southern Chile, and to be a subspecies of Dusicyon griseus. We report the finding of a continental population of D. ...
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(Springer, 2010)Pollinator-mediated selection is one of the most important factors driving adaptation in flowering plants. However, as ecological conditions change through habitat loss and fragmentation, the interactions among species ...
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(2018-11)La estructura espacial es una variable que influye en una amplia variedad de fenómenos en ecología y evolución. En ecología evolutiva, se ha señalado que la covarianza fenotipo-fitness puede ser sobrestimada si no se ...
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(Universidad de Chile, 2018-10)La medida en que los caracteres florales evolucionan bajo selección mediada por polinizadores ha sido ampliamente estudiada en la literatura. Sin embargo, la relación entre selección y efectividad de los polinizadores ...
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(SPRINGER, 2009-08-23)Self-pollination mechanisms are often invoked to explain plant reproduction in environments devoid of pollinators. However, populations may evolve a diverse variety of strategies depending on the ecological context of ...
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(Universidad de Chile, 2014)El objetivo de este trabajo es caracterizar la eficiencia y efectividad de los polinizadores nativos sobre la especie herbácea Mimulus luteus y examinar el impacto potencial del abejorro exótico Bombus terrestris en el ...
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(Universidad de Chile, 2005)
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(Universidad de Chile, 2013)
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(Elsevier GmbH., 2013)The nurse-protégé hypothesis states that adult plants of one species provide micro-environmental conditions that favor the establishment of seedlings of a second species with no effect for the first species. Several studies ...
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(2005)We evaluated experimentally the effect of a gall-maker insect on vegetative and reproductive traits of the shrub Colliguaja integerrima (Euphorbiaceae). We performed two experiments: (1) a chemical (insecticide) exclusion ...
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(Universidad de Chile, 2014)
