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Assessment of the Argentine ant invasion management by means of manual removal of winter nests in mixed cork oak and pine forests

The dynamic in Argentine ant colonies varies seasonally, influenced by biotic and abiotic factors. In winter the spatial range of the colony is contracted in large formations (winter nests) containing a large number of queens and workers. Winter nests are the clue to the species’ dispersion power and the invasion of new habitats. For this reason a yearly elimination of queens and workers in winter at the edge (front) of the invasion could be a useful tool for weakening the species’ dispersion and therefore limiting its establishment in new areas. Here, we determined the spatial dynamics of the Argentine ant nests during 1 year, and we assessed the invasion management by means of manual removal of winter nests for two consecutive winters, determining its effects during the following 3 years. We mapped nests found in 18 plots divided into two groups: extirpated (with removal of nests) and non-extirpated (control), along the fronts of three locations. Seasonal variation in the abundance of nests and workers, together with the two-year extirpation effects were evaluated. We found that colonies tended to follow an annual cycle of contraction and dispersion, with a decrease in the number of nests as we approached the invasion front. The extirpation was effective only in the front area, where it promoted smaller, less lasting and aggregated nests, as well as a decrease in the abundance of queens and workers. Nests also experienced a decrease during the two first winters but a recovery in the third, when no extirpation was done. Thus, a yearly perturbation should be performed to keep the expansion of the Argentine ant at a low rate, and to limit its establishment in new areas

This work was financed by the Spanish Ministry of Science and Innovation with the support of a predoctoral grant (BES-2008-005102) associated with research projects MEC/FEDER2007-64080-C02-02/BOS and CGL2010-16451, and a FI grant from the European Social Fund and the DIUE of the Autonomous Government of Catalonia in support of MLE

info:eu-repo/grantAgreement/MICINN//CGL2010-16451/ES/LOS FORMICIDOS COMO INDICADORES DEL IMPACTO DE LA FRAGMENTACION, EXPLOTACION E INVASION DE LA HORMIGA ARGENTINA EN BOSQUES DE PINUS PINEA PINUS PINASTER./

Springer Verlag

Manager: Ministerio de Educación y Ciencia (Espanya)
Author: Diaz Buitrago, Mireia
Abril, Sílvia
Enríquez Lenis, Martha Lucía
Gómez López, Crisanto
Date: 2014
Abstract: The dynamic in Argentine ant colonies varies seasonally, influenced by biotic and abiotic factors. In winter the spatial range of the colony is contracted in large formations (winter nests) containing a large number of queens and workers. Winter nests are the clue to the species’ dispersion power and the invasion of new habitats. For this reason a yearly elimination of queens and workers in winter at the edge (front) of the invasion could be a useful tool for weakening the species’ dispersion and therefore limiting its establishment in new areas. Here, we determined the spatial dynamics of the Argentine ant nests during 1 year, and we assessed the invasion management by means of manual removal of winter nests for two consecutive winters, determining its effects during the following 3 years. We mapped nests found in 18 plots divided into two groups: extirpated (with removal of nests) and non-extirpated (control), along the fronts of three locations. Seasonal variation in the abundance of nests and workers, together with the two-year extirpation effects were evaluated. We found that colonies tended to follow an annual cycle of contraction and dispersion, with a decrease in the number of nests as we approached the invasion front. The extirpation was effective only in the front area, where it promoted smaller, less lasting and aggregated nests, as well as a decrease in the abundance of queens and workers. Nests also experienced a decrease during the two first winters but a recovery in the third, when no extirpation was done. Thus, a yearly perturbation should be performed to keep the expansion of the Argentine ant at a low rate, and to limit its establishment in new areas
This work was financed by the Spanish Ministry of Science and Innovation with the support of a predoctoral grant (BES-2008-005102) associated with research projects MEC/FEDER2007-64080-C02-02/BOS and CGL2010-16451, and a FI grant from the European Social Fund and the DIUE of the Autonomous Government of Catalonia in support of MLE
Format: application/pdf
Document access: http://hdl.handle.net/10256/11935
Language: eng
Publisher: Springer Verlag
Collection: info:eu-repo/semantics/altIdentifier/doi/10.1007/s10530-013-0520-1
info:eu-repo/semantics/altIdentifier/issn/1387-3547
info:eu-repo/semantics/altIdentifier/eissn/1573-1464
Is part of: info:eu-repo/grantAgreement/MICINN//CGL2010-16451/ES/LOS FORMICIDOS COMO INDICADORES DEL IMPACTO DE LA FRAGMENTACION, EXPLOTACION E INVASION DE LA HORMIGA ARGENTINA EN BOSQUES DE PINUS PINEA PINUS PINASTER./
Rights: Tots els drets reservats
Subject: Invasions biològiques
Biological invasions
Animals invasors
Introduced organisms
Espècies introduïdes
Introduced organisms
Formiga argentina
Argentine ant
Title: Assessment of the Argentine ant invasion management by means of manual removal of winter nests in mixed cork oak and pine forests
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

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