Talaga S. auteur aut IRD Dezerald O. auteur aut IRD Carteron A. auteur aut IRD Petitclerc F. auteur aut IRD Leroy Céline auteur aut IRD Cereghino R. auteur aut IRD Dejean A. auteur aut IRD text journalArticle eng text/pdf born digital access Many tank bromeliads have facultative relationships with ants as is the case in French Guiana between Aechmea aquilega (Salib.) Griseb. and the trap-jaw ant, Odontomachus haematodus Linnaeus. Using a redundancy analysis, we determined that the presence of O. haematodus colonies is accompanied by a greater quantity of fine particulate organic matter in the water likely due to their wastes. This increase in nutrient availability is significantly correlated with an increase in the abundance of some detritivorous taxa, suggesting a positive bottom-up influence on the aquatic macroinvertebrate communities living in the A. aquilega wells. On the other hand, the abundance of top predators is negatively affected by a lower number of available wells due to ant constructions for nesting, releasing a top-down pressure that could also favor lower trophic levels. specialized Aechmea Ant-bromeliad associations Odontomachus Phytotelm Aquatic communities GUYANE FRANCAISE 076 082 036 338 10 696-700 2015 1631-0691 https://www.documentation.ird.fr/hor/fdi:010065391 10.1016/j.crvi.2015.05.006 1631-0691 [F B010065391] https://www.documentation.ird.fr/hor/fdi:010065391 https://www.documentation.ird.fr/intranet/publi/2015/11/010065391.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2015-12-04 2019-07-16 fdi:010065391 fre