Browsing by Author "Grez Villarroel, Audrey"
Now showing items 1-7 of 7
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Bustamante,; Grez Villarroel, Audrey; Simonetti Zambelli, Javier Andrés; Vasquez,; Walkowiak, (1993)Frugivores affect Cryptocarya alba seeds both positively and negatively by the simple act of removing the pericarp of the fruits. Germination is both increased and advanced but simultaneously seed mortality by rodent ...
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Murúa, Maureen M.; Grez Villarroel, Audrey; Simonetti Zambelli, Javier Andrés (Pontificia Universidad Catolica de Chile, Facultad de Agronomia e Ingenieria Forestal, 2011)Habitat fragmentation can affect the morphological design of flying insects in different ways through changes in the costs and benefits of dispersal patterns. Larger wings should be favored if necessary resources are ...
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Grez Villarroel, Audrey; Zaviezo, Tania; Díaz, Sandra; Camousseigt, Bernardino; Cortés, Galaxia (Czech Academy of Sciences, 2008)In agro-ecosystems, habitat loss and fragmentation may alter the assemblage of aphidophagous insects, such as foliarforaging (coccinellids) and ground-foraging predators (carabids), potentially affecting intraguild ...
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Simonetti Zambelli, Javier Andrés; Grez Villarroel, Audrey; Celis Diez, Juan L.; Bustamante Araya, Ramiro (2007)Forest fragmentation alters plant-animal interactions, including herbivory. Relying manipulative experiments, we test if the reduction in insect herbivory associated with forest fragmentation translates into increased ...
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Is top-down control by predators driving insect abundance and herbivory rates in fragmented forests? De La Vega, Xaviera; Grez Villarroel, Audrey; Simonetti Zambelli, Javier Andrés (2012)The effects of forest fragmentation on ecological interactions and particularly on food webs have scarcely been analysed. There is usually less herbivory in forest fragments than in continuous forests. Here we hypothesize ...
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Vergara, Pablo M.; Meneses, Luis O.; Grez Villarroel, Audrey; Quiroz, Madelaine S.; Soto, Gerardo E.; Pérez-Hernández, Christian G.; Diaz, Paola A.; Hahn, Ingo J.; Fierro, Andrés (Springer Netherlands, 2017)© 2016, Springer Science+Business Media Dordrecht. Context: Interactions between landscape-scale processes and fine-grained habitat heterogeneity are usually invoked to explain species occupancy in fragmented landscapes. ...
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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 ...