Browsing by Author "Grez Villarroel, Audrey"
Now showing items 21-29 of 29
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Rodríguez San Pedro, Annia; Carrasco Allendes, Juan Luis; Beltrán, Clemente A.; Chaperón Gamboa, Pascal; Saldarriaga-Córdoba, Mónica María; Silva, Andrea X.; Grez Villarroel, Audrey (Elsevier, 2020)The top-down suppression of pest insects by their natural enemies, such as insectivorous bats, represents an important ecosystem service in agricultural systems. Recognizing the importance of bats to suppress pest populations ...
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Resource concentration hypothesis: effect of host plant patch size on density of herbivorous insects Grez Villarroel, Audrey; González, R. H. (Springer-Verlag, 1995)The resource concentration hypothesis (Root 1973) predicts that specialist herbivorous insects should be more abundant in large patches of host plants, because the insects are more likely to find and stay longer in those ...
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Rodríguez San Pedro, Annia; Rodríguez-Herbach, Constanza; Allendes, Juan Luis; Chaperon, Pascal N.; Beltrán, Clemente A.; Grez Villarroel, Audrey (Elsevier B.V., 2019)Landscape composition and heterogeneity are considered important factors for enhancing biodiversity and their associated ecosystem services in human-modified landscapes. Despite their roles in pest suppression in agricultural ...
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Cerda, Yendery; Grez Villarroel, Audrey; Simonetti Zambelli, Javier Andrés (Springer, 2015)Tree plantations may play a role in the conservation of global forest biodiversity. At the landscape scale, plantations with a complex understory may provide surrogate habitats for forest-dwelling organisms. This was tested ...
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Grez Villarroel, Audrey; Zaviezo, Tania; Reyes, Susana (SOCIEDAD BIOLOGIA CHILE, 2004-09)Habitat loss and fragmentation are considered as the main causes of biodiversity depression. Habitat loss implies a reduction of suitable habitat for organisms, and habitat fragmentation is a change in the spatial configuration ...
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Romero, Violeta; Zaviezo, Tania; Grez Villarroel, Audrey (Pontifica Univ. Católica de Chile, 2020)Harmonia axyridis (Pallas) has invaded most continents in the world, including South America. In Chile, it became invasive after 2010, turning into a dominant species in coccinellid guilds in alfalfa crops, where it coexists ...
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González, G.; Bustamante, A.; Grez Villarroel, Audrey (Springer, 2019)Records of extreme altitudes where several coccinellid species from South America inhabit the Andes of Argentina, Bolivia, Chile, Colombia, Ecuador, and Peru are provided. After an intensive review of several entomological ...
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De la Vega Pallamar, Ximena Paz (Universidad de Chile, 2009)The effects of forest fragmentation on ecologioal interaotions and partioularly on foodwebs have scarcely treen analyzed. Herbivory is usually lower in forest fragments than in continuous forest. Here we hypothesize that ...
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Grez Villarroel, Audrey; Zaviezo, Tania; Gardiner, Mary M.; Alaniz, Alberto J. (Elsevier GmbH, 2019)Urbanization alters community composition, frequently leading to decline in native species abundance and richness. Nevertheless, responses might also depend on trait-based local habitat and landscape-scale filters. In this ...