SciELO - Scientific Electronic Library Online

vol.32 issue1Caloric content of the sand fly Lutzomyia ovallesi (Diptera: Psychodidae) vector of LeishmaniaComparative anatomy of the digestive tract in imagos of the weevil complex (Coleoptera: Curculionidae) associated with plantain plantations. author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google


Revista Colombiana de Entomología

Print version ISSN 0120-0488
On-line version ISSN 2665-4385


VARGAS O, GERMÁN A.; RIVERA, LEONARDO F  and  ARMBRECHT, INGE. Effect of the physiological stress in two species of ants (Formicidae) that inhabit coffee plantations with and without shade . Rev. Colomb. Entomol. [online]. 2006, vol.32, n.1, pp.61-66. ISSN 0120-0488.

It has been found that ant biodiversity is reduced with the transition from traditional coffee plantations (shade) to intensified (sun) systems and also that the composition of ant species changes in coffee plantations according to management. It has been hypothesized that ants from sun coffee plantations have physiological adaptations that permits them to colonize these habitats in comparison with ants from shade plantations. Using temperature as an indicator of microclimatic fluctuation, the behavior of Tetramorium simillimum , exclusive to sun plantations, and of Paratrechina steinheili , abundant but not exclusive to shade plantations (in Apía, Risaralda, Colombia), were analyzed in two thermal fluctuation tests between 17ºC and 32ºC, and one thermal shock test (12ºC and 35ºC) in an environmental chamber. Control colonies were maintained at constant temperature (24 +/- 1ºC). Ant activity outside the nest, foraging and mortality were evaluated. In the first two tests P. steinheili exhibited a relatively lower mortality than T. simillimum . In both cases the colonies submitted to stress in the environmental chamber lost more workers than controls. In the thermal shock test an increase in P. steinheili mortality was found, but it did not exceed that of T. simillimum . It is concluded that there is no evidence for physiological adaptation, at least detectable, of T. simillimum to thermal stress in comparison to P. steinheili and that perhaps other ecological factors, such as limitation of nesting resources, may restrict the presence of the latter to sun coffee plantations.

Keywords : Tetramorium simillimum ; Paratrechina steinheili ; Agriculture intensification; Coffee crops; Thermal fluctuations.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License