Carlos Valdivia

Carlos Valdivia
Universidad de Los Lagos · Departamento de Ciencias Biológicas y Biodiversidad

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22
Publications
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57
Citations

Publications

Publications (22)
Article
Livestock impact is one of the main causes of habitat loss globally. However, the effects of livestock on flora and fauna diversity have been contradictory, observing cases with positive, neutral, and negative effects. We performed a meta-analysis of the scientific information published in the last 15 years, using Google Scholar and WoS for the sea...
Article
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The syrphid genus Meromacrus is widespread in the Neotropics, but its presence in Chile has been confirmed just recently. Adults pollinate, and larvae are saprophagous of vegetal materials. In this note, we report Meromacrus cactorum Ricarte et al. for the first time from Chile. New data on adult habitats and flower visitation are also provided for...
Article
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Agricultural ecosystems host a large variety of organisms that can contribute to weed control through seed consumption. However, seed consumption rates in the agroecosystems of southern Chile are virtually unknown. We experimentally evaluate oat seed consumption by birds, rodents and invertebrates, in hedgerows dominated by trees, shrubs and grasse...
Article
Pollinator-dependency for reproduction is of great importance for plants. We evaluated the breeding system of Nolana balsamiflua, a threatened endemic shrub of the Atacama Desert, performing four pollination trials. No flower produced seeds by agamospermy, autogamy and geitonogamy. However, xenogamy accounted for 51.4% of fruiting, indicating its f...
Article
en Cushion and shrub plants are typical high mountain nurse plants. In Magellanic tundras of the Cordillera del Sarao on the coast of Chile, the carnivorous plant Drosera uniflora grows in association with cushions of Donatia fascicularis and the shrubs Chusquea montana var. nigricans and Lepidothamnus fonkii. The different microhabitats for recrui...
Article
Modifications in plant-mutualistic and plant-antagonistic interactions driven by habitat fragmentation may have far reaching consequences by affecting plant reproductive success and their microevolutionary dynamics. Mutualists (e.g., pollinators) and antagonists (e.g., herbivores) can exert non-additive effects on plant fitness, which is interprete...
Article
Nectar robbing by the ant Camponotus distinguendus was observed in flowers of Embothrium coccineum (Proteaceae), a tree mainly pollinated by hummingbirds. We hypothesized that robbing would reduce the amount of nectar, affecting the foraging behaviour of floral visitors and reducing seed production. Nectar robbing affected one-third of mature tree...
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Fruits of Gevuina avellana (Proteaceae) seem to mimic wasp-induced galls of Nothofagus dombeyi (Nothofagaceae) to escape predation by rodents, which may change both spatially and temporarily. The objective of this study was to evaluate the similarity between the fruits of G. avellana and the galls of N. dombeyi and to determine if this similarity p...
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Key message This work contributes to clarify the effects of small-scaled deforestation and key traits of plants and animals on frugivory, seed dispersal and seedling recruitment of a shade-intolerant plant. Abstract Habitat destruction usually reduces the frugivory and seed dispersal by animals. This negative effect could be counterbalanced by see...
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En los bosques templados australes la endozoocoría es determinante para muchas plantas con frutos carnosos, siendo las aves los mayores consumidores de frutos y dispersores de semillas. El zorzal austral Turdus falcklandii, es un ave residente que consume frutos de la pitra Myrceugenia planipes, incrementando la germinación de las semillas y reduci...
Article
Invasive floral visitors may obtain nectar rewards from native plants exerting nectar robbing. Nevertheless, the probability of a plant to be robbed will ultimately depend upon the accessibility constraints imposed by the phenotypes of flowers and animals, and putatively upon the abundance of animals. The alien bumblebee B. terrestris is widely dis...
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En ecosistemas boscosos, numerosas especies de aves insectívoras usan ciertas especies de árboles como sustrato de alimentación y de nidificación. Evaluamos el uso de Pygarrhichas albogularis King, 1831 por componentes florísticos utilizados como sustrato de alimentación en un bosque nativo en el sur de Chile entre el 2009 y 2010. De 13 especies de...
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The consumption of seeds by animals can increase the germination probability because of seeds passage through animal guts. The loss of a native disperser by anthropogenic threats might be compensated by generalist alien seed dispersers. The aim of this work was evaluating the role of dogs (Canis lupus familiaris) and foxes (Pseudalopex spp.) for se...
Article
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Frugivorous birds are phenologically linked to the fruits that they eat. When there is less fruit in seasonal environments, frugivorous birds complement their diet by eating invertebrates. The depth of the phenological link between frugivorous birds and their dietary resources has not been studied until now. The objective was to determine the possi...
Article
Numerous vertebrates, and in particular birds, ingest stones (geo-gastrolites) to favour the breakdown and digestion of food in the muscular stomachs. Between 1993 and 1994 we evaluated the quantity, relative abundance and quality of autochthonous (geo-gastrolites) and allochthonous (pieces of glass) components of the grit in gizzards of black-face...
Article
At central Chile grows the spiny forest of Acacia caven and Prosopis chilensis of which less than 40% of its original surface currently persists, but with no representation into the wilderness protected areas. Owing to the action of cattle, has it been previously suggested a population reduction of P chilensis coupled to a population increase of A....
Article
Full-text available
Numerous vertebrates, and in particular birds, ingest stones (geo-gastrolites) to favour the breakdown and digestion of food in the muscular stomachs. Between 1993 and 1994 we evaluated the quantity, relative abundance and quality of autochthonous (geo-gastrolites) and allochthonous (pieces of glass) components of the grit in gizzards of black-face...
Article
Full-text available
At central Chile grows the spiny forest of Acacia caven and Prosopis chilensis of which less than 40% of its original surface currently persists, but with no representation into the wilderness protected areas. Owing to the action of cattle, has it been previously suggested a population reduction of P. chilensis coupled to a population increase of A...
Article
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 in fitness, because the negative effects of a loss of a mutualism may be counterbalanced by the positive effects of a loss of an ant...
Article
Full-text available
Negative density-dependent relationships in plant communities are currently claimed as an important mechanism for the maintenance of plant diversity. However, anthropogenic perturbations such as forest fragmentation might modify such relationships. We evaluated density-dependent relationships between seed and seedling abundance of a tree assemblage...

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