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9 results on '"LESCANO, MARÍA N."'

6. Firewood as a pathway for insect introductions. What are the risks of ant invasions in Patagonia?

Author

Werenkraut, Victoria, Pirk, Gabriela I., Lescano, María N., Benclowicz, José Daniel, and Elizalde, Luciana

Subjects
Dispersión a Larga Distancia, Otras Ciencias Biológicas, Especies Exóticas, ALIEN SPECIES, SOCIAL INSECTS, purl.org/becyt/ford/1 [https], Ciencias Biológicas, NON-NATIVE SPECIES, CAMPONOTUS MUS, LONG-DISTANCE DISPERSAL, Especies no Nativas, purl.org/becyt/ford/1.6 [https], Ciencias Exactas y Naturales, Insectos Sociales, CIENCIAS NATURALES Y EXACTAS
Abstract

Fil: Werenkraut, Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Werenkraut, Victoria. Centro Científico Tecnológico CONICET - Patagonia Norte; Argentina Fil: Werenkraut, Victoria. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Werenkraut, Victoria. Universidad Nacional del Comahue; Argentina Fil: Werenkraut, Victoria. Universidad Bariloche; Argentina Fil: Pirk, Gabriela I. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Pirk, Gabriela I. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Pirk, Gabriela I. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Pirk, Gabriela I. Universidad Nacional del Comahue; Argentina Fil: Pirk, Gabriela I. Universidad de Bariloche; Argentina Fil: Lescano, María N. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Lescano, María N. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Lescano, María N. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Lescano, María N. Universidad Nacional del Comahue; Argentina Fil: Lescano, María N. Universidad de Bariloche; Argentina Fil: Benclowicz, José D. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Benclowicz, José D. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Benclowicz, José D. Instituto de Investigaciones en Diversidad Cultural y Procesos de Cambio; Argentina Fil: Benclowicz, José D. Universidad Nacional de Río Negro; Argentina Fil: Elizalde, Luciana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Elizalde, Luciana. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina Fil: Elizalde, Luciana. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina Fil: Elizalde, Luciana. Universidad Nacional del Comahue; Argentina Fil: Elizalde, Luciana. Universidad de Bariloche; Argentina Firewood can act as a long-distance dispersal vector for wood-infesting insects both within and among countries. Recently, we have detected the alien carpenter ant Camponotus mus in firewood transported from central Argentina to Patagonia. This species generates significant economic losses in its native range and has invader potential. Moreover, global warming and the increasing anthropogenic disturbance in Patagonia make this region highly susceptible to insect invasions. This is especially alarming considering the current lack of sanitary controls of incoming goods. To prevent insect introductions via firewood it is crucial to implement a joint effort among the scientific community, control organisms, government, and end user. La leña puede actuar como vector de dispersión de insectos a larga distancia, tanto dentro como entre países. Recientemente encontramos en Patagonia a la hormiga carpintera exótica Camponotus mus en leña transportada desde el centro de la Argentina. Esta especie tiene potencial invasor, y en su rango nativo genera pérdidas económicas signifcativas. Además, el calentamiento global y el incremento de los disturbios antrópicos en los ecosistemas Patagónicos los vuelven muy susceptible a las invasiones de insectos. Esto es especialmente alarmante dada la falta de controles sanitarios en el transporte de bienes hacia la región. Para prevenir introducciones de insectos a través de la leña es necesario un esfuerzo conjunto de la comunidad científica, los organismos de control, el gobierno y los usuarios finales.

Published
2017

9. Nocturnal resource defence in aphid-tending ants of northern Patagonia.

Author

LESCANO, MARÍA N., FARJI‐BRENER, ALEJANDRO G., and GIANOLI, ERNESTO

Subjects
*NOCTURNAL animal activity, *PATAGONIA (Insects), *ANT colonies, *COMPETITION (Biology), *THISTLE control, APHID host plants
Abstract

Interspecific competition plays a key role in the organisation of ant communities. In ant-plant interactions, individual host plants are usually occupied by a single ant colony, and co-occurring ant species compete for hosts. Here indirect evidence of competition between three dominant ant species that tend aphids on two biennial thistles in northern Patagonia is described, and a novel defensive behaviour in temperate ant assemblages is reported., This study has found that: (i) dominant ant species were not spatially segregated, thus enhancing the probability of fights and invasions of host plants; (ii) ant species did not show preferences for a thistle species or for any plant characteristic, and thus all plants have similar chances of being colonised by all dominant ant species; (iii) the resident ant species remained on the same plant during the whole plant life cycle, monopolising plant resources (aphids); and (iv) all dominant species, whose nests are on the ground, assigned some ants to stay on the host plant during the night, when the low temperatures typical of this temperate environment greatly reduce foraging activities. When these 'nocturnal guards' were experimentally removed from the host plant, other ants from the same colony rapidly appeared showing aggressive behaviours., Taking all these findings together, it is suggested that interspecific competition influences the distribution of ants on their host plants and involves nocturnal defensive behaviours despite unfavourable thermal conditions. This illustrates how habitat features, such as the short life cycle of thistles and the low night-time temperatures that reduce ant foraging and thus make plants more vulnerable to invasion, might affect the distribution and behaviour of ants. [ABSTRACT FROM AUTHOR]

Published
2014
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