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Author Dejean, A.; Corbara, B.; Céréghino, R.; Leponce, M.; Roux, O.; Rossi, V.; Delabie, J.H.C.; Compin, A. doi  openurl
  Title Traits allowing some ant species to nest syntopically with the fire ant Solenopsis saevissima in its native range Type Journal Article
  Year 2015 Publication Insect Science Abbreviated Journal (up) Insect Science  
  Volume 22 Issue 2 Pages 289-294  
  Keywords Ant community; Fire ants; Invasive species; Solenopsis saevissima; Species coexistence; Supercoloniality  
  Abstract Supercolonies of the red fire ant Solenopsis saevissima (Smith) develop in disturbed environments and likely alter the ant community in the native range of the species. For example, in French Guiana only 8 ant species were repeatedly noted as nesting in close vicinity to its mounds. Here, we verified if a shared set of biological, ecological, and behavioral traits might explain how these 8 species are able to nest in the presence of S. saevissima. We did not find this to be the case. We did find, however, that all of them are able to live in disturbed habitats. It is likely that over the course of evolution each of these species acquired the capacity to live syntopically with S. saevissima through its own set of traits, where colony size (4 species develop large colonies), cuticular compounds which do not trigger aggressiveness (6 species) and submissive behaviors (4 species) complement each other. © 2013 Institute of Zoology, Chinese Academy of Sciences.  
  Address U.P.A. Laboratório de Mirmecologia, Convênio UESC/CEPLAC, C.P. 7Itabuna, Bahia, Brazil  
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  Notes Export Date: 9 April 2015 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 594  
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Author Lenoir, A.; Devers, S.; Touchard, A.; Dejean, A. url  doi
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  Title The Guianese population of the fire ant Solenopsis saevissima is unicolonial Type Journal Article
  Year 2016 Publication Insect Science Abbreviated Journal (up) Insect Science  
  Volume 23 Issue 5 Pages 739-745  
  Keywords biological invasions; cuticular hydrocarbons; fire ants; unicoloniality  
  Abstract In this study, conducted in French Guiana, a part of the native range of the fire ant Solenopsis saevissima, we compared the cuticular hydrocarbon profiles of media workers with previous results based on intraspecific aggressiveness tests. We noted a strong congruence between the two studies permitting us to delimit 2 supercolonies extending over large distances (up to 54 km), a phenomenon known as unicoloniality. Solenopsis geminata workers, taken as an out-group for cluster analyses, have a very different cuticular hydrocarbon profile. Because S. saevissima has been reported outside its native range, our conclusion is that this species has the potential to become invasive because unicoloniality (i.e., the main attribute for ants to become invasive) was shown at least for the Guianese population. © 2015 Institute of Zoology, Chinese Academy of Sciences  
  Address CNRS, Ecolab (UMR-CNRS 5245), Toulouse, France  
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  Notes Export Date: 3 October 2016 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 696  
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Author Dejean, A.; Azémar, F.; Céréghino, R.; Leponce, M.; Corbara, B.; Orivel, J.; Compin, A. url  doi
openurl 
  Title The dynamics of ant mosaics in tropical rainforests characterized using the Self-Organizing Map algorithm Type Journal Article
  Year 2016 Publication Insect Science Abbreviated Journal (up) Insect Science  
  Volume 23 Issue 4 Pages 630-637  
  Keywords ant plant relationships; dynamics of associations; myrmecophytes; tropical rainforests  
  Abstract Ants, the most abundant taxa among canopy-dwelling animals in tropical rainforests, are mostly represented by territorially dominant arboreal ants (TDAs) whose territories are distributed in a mosaic pattern (arboreal ant mosaics). Large TDA colonies regulate insect herbivores, with implications for forestry and agronomy. What generates these mosaics in vegetal formations, which are dynamic, still needs to be better understood. So, from empirical research based on 3 Cameroonian tree species (Lophira alata, Ochnaceae; Anthocleista vogelii, Gentianaceae; and Barteria fistulosa, Passifloraceae), we used the Self-Organizing Map (SOM, neural network) to illustrate the succession of TDAs as their host trees grow and age. The SOM separated the trees by species and by size for L. alata, which can reach 60 m in height and live several centuries. An ontogenic succession of TDAs from sapling to mature trees is shown, and some ecological traits are highlighted for certain TDAs. Also, because the SOM permits the analysis of data with many zeroes with no effect of outliers on the overall scatterplot distributions, we obtained ecological information on rare species. Finally, the SOM permitted us to show that functional groups cannot be selected at the genus level as congeneric species can have very different ecological niches, something particularly true for Crematogaster spp., which include a species specifically associated with B. fistulosa, nondominant species and TDAs. Therefore, the SOM permitted the complex relationships between TDAs and their growing host trees to be analyzed, while also providing new information on the ecological traits of the ant species involved. © 2015 Institute of Zoology, Chinese Academy of Sciences  
  Address Clermont Université, Université Blaise Pascal, LMGE, BP 10448, Clermont-Ferrand, France  
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  Notes Export Date: 1 September 2016 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 689  
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Author Talaga, S.; Dejean, A.; Mouza, C.; Dumont, Y.; Leroy, C. doi  openurl
  Title Larval interference competition between the native Neotropical mosquito Limatus durhamii and the invasive Aedes aegypti improves the fitness of both species Type Journal Article
  Year 2018 Publication Insect Science Abbreviated Journal (up) Insect Science  
  Volume 25 Issue Pages 1102-1107  
  Keywords Aedes aegypti; increased fitness; interference competition; Limatus durhamii; phenotypic plasticity; resistance to invasion  
  Abstract Abstract Interspecific competition with native species during biological invasions can sometimes limit alien expansion. We aimed to determine the potential ecological effects of Limatus durhamii Theobald 1901, a native Neotropical mosquito (Diptera: Culicidae) species, on the invasive species Aedes (Stegomyia) aegypti (Linnaeus 1762) that breeds in the same artificial water containers. Development time and adult dry mass were measured in 3 rearing conditions: control (a single larva), intraspecific competition (2 conspecific larvae), and interspecific competition (2 heterospecific larvae). Food was provided ad libitum to eliminate exploitative competition. For Ae. aegypti, development time was not affected by interspecific interference competition (nonsignificant differences with the control) and the adult dry mass was significantly higher, meaning that individual fitness likely increased. Yet, because previous studies showed longer development time and lighter adults during competition with other invasive mosquitoes, it is likely that Ae. aegypti can express a different phenotype depending on the competing species. The similar pattern found for Li. durhamii females and the nonsignificant difference with the control for males explain in part why this species can compete with Ae. aegypti.  
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  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
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  ISSN 1672-9609 ISBN Medium  
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  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 836  
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Author Servigne, P.; Orivel, J.; Azémar, F.; Carpenter, J.; Dejean, A.; Corbara, B. doi  openurl
  Title An uneasy alliance: a nesting association between aggressive ants and equally fierce social wasps Type Journal Article
  Year 2020 Publication Insect Science Abbreviated Journal (up) Insect Science  
  Volume 27 Issue 1 Pages 122-132  
  Keywords Azteca chartifex ants; interspecific association; mutualism; Polybia rejecta wasps; scent trail erasure  
  Abstract Although the Neotropical territorially dominant arboreal ant Azteca chartifex Forel is very aggressive towards any intruder, its populous colonies tolerate the close presence of the fierce polistine wasp Polybia rejecta (F.).
In French Guiana, 83.33% of the 48 P. rejecta nests recorded were found side by side with those of A. chartifex. This nesting association results in mutual protection from predators (i.e., the wasps protected from army ants; the ants protected from birds).
We conducted field studies, laboratory-based behavioral experiments and chemical analyses to elucidate the mechanisms allowing the persistence of this association. Due to differences in the cuticular profiles of the two species, we eliminated the possibility of chemical mimicry.
Also, analyses of the carton nests did not reveal traces of marking on the envelopes. Because ant forager flows were not perturbed by extracts from the wasps' Dufour's and venom glands, we rejected any hypothetical action of repulsive chemicals. Nevertheless, we noted that the wasps 'scraped' the surface of the upper part of their nest envelope using their mandibles, likely removing the ants' scent trails, and an experiment showed that ant foragers were perturbed by the removal of their scent trails. This leads us to use the term 'erasure hypothesis'. Thus, this nesting association persists thanks to a relative tolerance by the ants towards wasp presence and the behavior of the wasps that allows them to 'contain' their associated ants through the elimination of their scent trails, direct attacks, 'wing-buzzing' behavior and ejecting the ants.
 
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  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
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  ISSN 1672-9609 ISBN Medium  
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  Notes doi: 10.1111/1744-7917.12597 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 885  
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Author Groc, S.; Orivel, J.; Dejean, A.; Martin, J.M.; Etienne, M.P.; Corbara, B.; Delabie, J.H.C. openurl 
  Title Baseline study of the leaf-litter ant fauna in a French Guianese forest Type Journal Article
  Year 2009 Publication Insect Conservation and Diversity Abbreviated Journal (up) Insect. Conserv. Divers.  
  Volume 2 Issue 3 Pages 183-193  
  Keywords Ants of the Leaf Litter Protocol; baseline study; leaf-litter ants; Nouragues; Winkler method  
  Abstract 1. Leaf-litter ants represent a major component of biodiversity and are excellent bioindicators reflecting the health of terrestrial ecosystems. This study, conducted in an unspoiled forest near the Nouragues Research Station, represents the first inventory of leaf-litter ant diversity conducted in French Guiana, and so can be considered as the baseline dataset for ants in this country. 2. Ants were extracted from the leaf-litter using the Ants of the Leaf Litter Protocol, along an altitudinal gradient at four forest sites, including an inselberg. 3. A total of 196 ant species representing 46 genera distributed over eight subfamilies were collected. Four distinct communities spread over a gradient of diversity were thus identified: the liana forest was the most species-rich (140 species) followed by the forested plateau (102 species), the transition forest (87 species) and the forest at the top of the inselberg (71 species). 4. The discovery of species new to science plus several species recorded for the first time in French Guiana, coupled with the particular context of this area, suggests that the Nouragues Research Station might represent a centre of endemism. Once completed, this leaf-litter ant dataset will contribute greatly to the knowledge of ant biodiversity in French Guiana, and has the potential to progressively become an indispensable tool for country-wide conservation planning programmes.  
  Address [Groc, Sarah; Dejean, Alain; Martin, Jean-Michel] CNRS, Ecol Forets Guyane UMR 8172, Kourou, France, Email: sarah.groc@ecofog.gf  
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  Publisher WILEY-LISS Place of Publication Editor  
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  ISSN 1752-458X ISBN Medium  
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  Notes ISI:000268269400004 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 108  
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Author Grangier, J.; Orivel, J.; Negrini, M.; Dejean, A. openurl 
  Title Low intraspecific aggressiveness in two obligate plant-ant species Type Journal Article
  Year 2008 Publication Insectes Sociaux Abbreviated Journal (up) Insect. Soc.  
  Volume 55 Issue 3 Pages 238-240  
  Keywords aggressiveness; Allomerus; myrmecophytes; plant-ants; recognition ability  
  Abstract Little is known about the aggressiveness of plant-ants typically living in isolated trees nor about how that aggressiveness varies based on this isolation. Here, we examine intra- and interspecific aggressiveness between workers of two Allomerus species associated with two different myrmecophytes. In both cases, the level of intraspecific aggressiveness is very low whatever the distance separating the tested nests, while interspecific conflicts are always violent. Similar patterns of aggressiveness have been reported in various ant species, but the strictly arboreal life of Allomerus ants associated with the isolation of their adult colonies highlight different ecological conditions that might explain the lack of aggressiveness between conspecifics.  
  Address [Grangier, J.; Orivel, J.; Negrini, M.; Dejean, A.] Univ Toulouse 3, CNRS, UMR 5174, Lab Evolut & Diversite Biol, F-31062 Toulouse 9, France, Email: grangier@cict.fr  
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  Publisher BIRKHAUSER VERLAG AG Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0020-1812 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000258959300004 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 208  
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Author Tindo, M.; Mbenoun Masse, P.S.; Kenne, M.; Mony, R.; Orivel, J.; Doumtsop Fotio, A.; Fotso Kuaté, A.; Djiéto-Lordon, C.; Fomena, A.; Estoup, A.; Dejean, A.; Foucaud, J. url  openurl
  Title Current distribution and population dynamics of the little fire ant supercolony in cameroon Type Journal Article
  Year 2012 Publication Insectes Sociaux Abbreviated Journal (up) Insectes Sociaux  
  Volume 59 Issue 2 Pages 175-182  
  Keywords Auropunctata; Dispersion; Invasive ants; Reproduction strategy; Unicoloniality; Wasmannia  
  Abstract The little fire ant, Wasmannia auropunctata, is native to Central America, but has been introduced into many parts of the world. We examined the current distribution of W. auropunctata in Cameroon, tested for aggression between workers from different parts of the country, and examined the genotypes of workers, queens, and males to evaluate the mating system. We found W. auropunctata at 36 sites in three provinces (Centre, East, and South). We found W. auropunctata only in human-disturbed habitats. Its spread appears to be primarily human mediated. Aggressive behaviour was almost non-existent between workers from different sites, indicating that there is only one supercolony in Cameroon. Our genetic analysis found that only one male/female pair of clones was introduced into Cameroon, probably from Gabon. No new male clonal lineage was identified, whereas new sexually derived female clonal lineages were noted. Apart from the genotype of the founding queen, which was well distributed but generally not dominant, a new clonal queen genotype emerged and was both omnipresent and dominant at most sites. These results may be useful in the development of management strategies. © International Union for the Study of Social Insects (IUSSI) 2011.  
  Address Laboratoire Evolution Genome Speciation, Centre National de la Recherche Scientifique, Avenue de la Terrasse, F 91198 Gif sur Yvette, France  
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  ISSN 00201812 (Issn) ISBN Medium  
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  Notes Export Date: 24 April 2012; Source: Scopus; Coden: Insoa; doi: 10.1007/s00040-011-0202-x; Language of Original Document: English; Correspondence Address: Tindo, M.; Département de Biologie des Organismes Animaux, Faculté des Sciences, Université de Douala, BP 24157 Douala, Cameroon; email: tindodouala@yahoo.com Approved no  
  Call Number EcoFoG @ webmaster @ Serial 392  
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Author Ruiz-González, M.X.; Leroy, C.; Dejean, A.; Gryta, H.; Jargeat, P.; Carrión, A.D.A.; Orivel, J. pdf  url
doi  openurl
  Title Do host plant and associated ant species affect microbial communities in myrmecophytes? Type Journal Article
  Year 2019 Publication Insects Abbreviated Journal (up) Insects  
  Volume 10 Issue 11 Pages 391  
  Keywords Allomerus decemarticulatus; Allomerus octoarticulatus; Azteca sp; Cf; Cordia nodosa; Depilis; Domatia; Hirtella physophora; Microbial diversity  
  Abstract Ant-associated microorganisms can play crucial and often overlooked roles, and given the diversity of interactions that ants have developed, the study of the associated microbiomes is of interest. We focused here on specialist plant-ant species of the genus Allomerus that grow a fungus to build galleries on their host-plant stems. Allomerus-inhabited domatia, thus, might be a rich arena for microbes associated with the ants, the plant, and the fungus. We investigated the microbial communities present in domatia colonised by four arboreal ants: Allomerus decemarticulatus, A. octoarticulatus, A. octoarticulatus var. demerarae, and the non-fungus growing plant-ant Azteca sp. cf. depilis, inhabiting Hirtella physophora or Cordia nodosa in French Guiana. We hypothesized that the microbial community will differ among these species. We isolated microorganisms from five colonies of each species, sequenced the 16S rRNA or Internal TranscribedSpacer (ITS) regions, and described both the alpha and beta diversities. We identified 69 microbial taxa, which belong to five bacterial and two fungal phyla. The most diverse phyla were Proteobacteria and Actinobacteria. The microbial community of Azteca cf. depilis and Allomerus spp. differed in composition and richness. Geographical distance affected microbial communities and richness but plant species did not. Actinobacteria were only associated with Allomerus spp.  
  Address Biodiversity Genomics Team, Plant Ecophysiology & Evolution Group, Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Daxuedonglu 100, Nanning, Guangxi 530005, China  
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  Publisher Mdpi Ag Place of Publication Editor  
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  ISSN 20754450 (Issn) ISBN Medium  
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  Notes Export Date: 18 November 2019; Correspondence Address: Ruiz-González, M.X.; Departamento de Ciencias Biológicas, Universidad Técnica Particular de Loja, San Cayetano Alto s/n, Ecuador; email: marioxruizgonzalez@gmail.com Approved no  
  Call Number EcoFoG @ webmaster @ Serial 896  
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Author Salvin, P.; Ondel, O.; Roos, C.; Robert, F. doi  openurl
  Title Energy harvest with mangrove benthic microbial fuel cells Type Journal Article
  Year 2015 Publication International Journal of Energy Research Abbreviated Journal (up) Int J Energy Res  
  Volume 39 Issue 4 Pages 543-556  
  Keywords Balancing circuit; Benthic microbial fuel cell; Efficiency; Energy harvesting  
  Abstract Benthic microbial fuel cells (BMFCs) are continuous electricity generators using electroactive microorganisms and organic matter from aquatic environment, respectively, as catalysts and substrate. In this paper, first a low-cost PVC-made structure is constructed to harvest electricity from mangrove environment located in French Guiana. An in situ BMFC has given power density of 30mW/m2 of the anodic surface area. This performance has been confirmed by experience in laboratory where inter-electrode distance and electrode surface area appeared to be power increasing factors. However, the output power of one BMFC is not used to supply real devices such as autonomous sensors. Second, to meet this expectation, in parallel and in series associations were considered. These associations were made in order to increase the output voltage and consequently the power, to reach levels that can supply small sensors (about 3V). Finally, to improve the performance of the series association and to avoid the voltage reversal phenomenon, a voltage balancing circuit was simulated and added to the series connections. With balancing method, the cell voltage of BMFCs can be equalized, and the performances can be improved. This allows an optimal energy harvesting and a better global efficiency of the set.  
  Address Université de Lyon, F-69622, Lyon, France, Université Lyon 1, Villeurbanne; CNRS, UMR 5005, Laboratoire Ampère, 43, Boulevard du 11 Novembre 1918Villeurbanne, France  
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  Notes Export Date: 17 March 2015 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 586  
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