Browsing by Title Facultad de Ciencias
Now showing items 5287-5306 of 8192
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(Elsevier, 2021)The sustainable provision of pollination services in large regions of the Nearctic and Neotropics usually involves the coexistence of a rich assemblage of native bees and introduced bees in the same agroecosystem. This ...
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(Springer Verlag, 2017)© 2016, Springer-Verlag Berlin Heidelberg. The understanding of the spatial and temporal patterns in land use and land cover (LULC) change is a key issue for conservation efforts. In the Chilean hotspot, different studies ...
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Native forest replacement by exotic plantations triggers changes in prey selection of mesocarnivores (Elsevier, 2015)Replacement of native forests by forest plantations may change the composition and abundance of small mammals, thus influencing the foraging behavior of mesocarnivores in these human-created habitats. We assessed how ...
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(2002)The temperate forest of southern South America (TFSSA) has a highly endemic biota with a flora that exhibits one of the highest incidences of biotic pollination (particularly ornithophily) and animal dispersal (particularly ...
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(Springer, 2016)The pronotum is the most distinctive and representative structure in treehoppers. Although several functions have been proposed for this structure, its involvement in fitness has not been formally evaluated. Given the high ...
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(2001)We report on direct current measurements on a nearshore location, Peninsula Mejillones, within the Humboldt current system (HCS) in the Eastern South Pacific. Currents and hydrography were measured in a 23-station grid on ...
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(2004)Most studies assessing the importance of developmental instability of floral characters for pollinator visits and plant fitness have focused on the fluctuating asymmetry (FA) of the corolla phenotype. The importance of ...
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(2011)Background - Habitat fragmentation may have detrimental effects on both plant-mutualistic (i.e. pollination) and plant-antagonistic interactions (i.e. foliar herbivory). Such double negative effects may lead to a change ...
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(Springer, 2004)Studies on plant-pollinator interactions have largely neglected the potential negative effects of the predators of pollinators on seed output, even though anti-predatory behaviour of pollinators may affect visitation ...
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(2012)The outcome of the dispersal process in zoochorous plants is largely determined by the behavior of frugivorous animals. Recent simulation studies have found that fruit removal rates and mean dispersal distances are strongly ...
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(1987)A new neo-clerodane dilactone, desoxyarticulin, and dihydrotucumanoic acid, together with other known compounds, were isolated from Baccharis pedicellata and Baccharis marginalis. The structures of the new compounds were ...
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Neogenin1 is a Sonic Hedgehog target in medulloblastoma and is necessary for cell cycle progression (UICC, 2014)The canonical Sonic Hedgehog (Shh)/Gli pathway plays multiples roles during central nervous system (CNS) development. To elucidate the molecular repertoire of Shh mediators, we have recently described novel transcriptional ...
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(Elsevier, 2013)Nicotine is an agonist of nicotinic acetylcholine receptors (nAChRs)that has been extensively used as a template for the synthesis of a4b2-prefer ring nAChRs.Here,we used the N-methyl-pyrrolidine moiety of nicotine to ...
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(2013)Nicotine is an agonist of nicotinic acetylcholine receptors (nAChRs) that has been extensively used as a template for the synthesis of α4β2-preferring nAChRs. Here, we used the N-methyl-pyrrolidine moiety of nicotine to ...
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(Elsevier, 2013)This paper discusses a well-represented fossil record of cartilaginous fishes (Chondrichthyes) from southern South America. The recovered samples allow the recognition of three assemblages with chronostratigraphic and ...
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(Wilson Ornithological Soc, 2016)We present descriptions of nest architecture, clutch size, nestling growth and nestling attendance for the Fire-eyed Diucon (Xolmis pyrope), based on nests found at the Fray Jorge National Park, Chile, at the northernmost ...
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(BRILL ACADEMIC PUBLISHERS, 2006-07)Nest-mate recognition and territorial behaviour in ants are widely studied phenomena. However, few studies have analysed, under field conditions, how nest-mate recognition varies with distance from the resident's colony. ...
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(ROYAL SOC, 2007-11-01)In eusocial Hymenoptera, females are more tolerant towards nest-mate than towards non-nest-mate females. In solitary Hymenoptera, females are generally aggressive towards any conspecific female. Field observations of the ...
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(Royal Society, 2008)In eusocial Hymenoptera, females are more tolerant towards nest-mate than towards non-nest-mate females. In solitary Hymenoptera, females are generally aggressive towards any conspecific female. Field observations of the ...
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(American Ornithologist Society, 2002)We studied the effect of forest fragmentation on the nesting biology and reproductive success of three species of tapaculos (Rhinocryptidae) in relation to forest size, edge effects, and disturbance from livestock or logging ...