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Author Zinger, L.; Taberlet, P.; Schimann, H.; Bonin, A.; Boyer, F.; De Barba, M.; Gaucher, P.; Gielly, L.; Giguet-Covex, C.; Iribar, A.; Réjou-Méchain, M.; Rayé, G.; Rioux, D.; Schilling, V.; Tymen, B.; Viers, J.; Zouiten, C.; Thuiller, W.; Coissac, E.; Chave, J. url  doi
openurl 
  Title Body size determines soil community assembly in a tropical forest Type Journal Article
  Year 2019 Publication Molecular Ecology Abbreviated Journal Mol Ecol  
  Volume (down) 28 Issue 3 Pages 528-543  
  Keywords DNA metabarcoding; eDNA; French Guiana; multitaxa; neutral assembly; niche determinism; propagule size; soil diversity  
  Abstract Tropical forests shelter an unparalleled biological diversity. The relative influence of environmental selection (i.e., abiotic conditions, biotic interactions) and stochastic?distance-dependent neutral processes (i.e., demography, dispersal) in shaping communities has been extensively studied for various organisms, but has rarely been explored across a large range of body sizes, in particular in soil environments. We built a detailed census of the whole soil biota in a 12-ha tropical forest plot using soil DNA metabarcoding. We show that the distribution of 19 taxonomic groups (ranging from microbes to mesofauna) is primarily stochastic, suggesting that neutral processes are prominent drivers of the assembly of these communities at this scale. We also identify aluminium, topography and plant species identity as weak, yet significant drivers of soil richness and community composition of bacteria, protists and to a lesser extent fungi. Finally, we show that body size, which determines the scale at which an organism perceives its environment, predicted the community assembly across taxonomic groups, with soil mesofauna assemblages being more stochastic than microbial ones. These results suggest that the relative contribution of neutral processes and environmental selection to community assembly directly depends on body size. Body size is hence an important determinant of community assembly rules at the scale of the ecological community in tropical soils and should be accounted for in spatial models of tropical soil food webs.  
  Address  
  Corporate Author Thesis  
  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0962-1083 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 873  
Permanent link to this record
 

 
Author Almeras, T.; Gril, J. openurl 
  Title Mechanical analysis of the strains generated by water tension in plant stems. Part 1: stress transmission from the water to the cell walls Type Journal Article
  Year 2007 Publication Tree Physiology Abbreviated Journal Tree Physiol.  
  Volume (down) 27 Issue 11 Pages 1505-1516  
  Keywords biomechanics; cell mechanics; diurnal strains; mechanical model; multilayer cylinder; stress transtnissionjactor  
  Abstract Plant tissues shrink and swell in response to changes in water pressure. These strains can be easily measured, e.g., at the surface of tree stems, to obtain indirect information about plant water status and other physiological parameters. We developed a mechanical model to clarify how water pressure is transmitted to cell walls and causes shrinkage of plant tissues, particularly in the case of thick-walled cells such as wood fibers. Our analysis shows that the stress inside the fiber cell walls is lower than the water tension. The difference is accounted for by a stress transmission factor that depends on two main effects. The first effect is the dilution of the stress through the cell wall, because water acts at the lumen border and is transmitted to the cuter border of the cell, which has a larger circumference. The second effect is the partial conversion of radial stress into tangential stress. Both effects are quantified as functions of parameters of the cell wall structure and its mechanical properties.  
  Address INRA, UMR Ecofog, F-97379 Kourou, French Guiana, France, Email: t_almeras@hotmail.com  
  Corporate Author Thesis  
  Publisher HERON PUBLISHING Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0829-318X ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000250847000001 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 152  
Permanent link to this record
 

 
Author Sierra, J.; Daudin, D.; Domenach, A.M.; Nygren, P.; Desfontaines, L. openurl 
  Title Nitrogen transfer from a legume tree to the associated grass estimated by the isotopic signature of tree root exudates: A comparison of the N-15 leaf feeding and natural N-15 abundance methods Type Journal Article
  Year 2007 Publication European Journal of Agronomy Abbreviated Journal Eur. J. Agron.  
  Volume (down) 27 Issue 2-4 Pages 178-186  
  Keywords agroforestry; box model; gliricidia sepium; N-15 fractionation; root turnover; tree pruning  
  Abstract Nitrogen (N) transfer from legume trees to associated crops is a key factor for the N economy of low-input agroforestry systems. In this work, we presented a new approach to estimate N transfer based on the N-15 content of root exudates and N released by root turnover of the donor plant (Gliricidia sepium) and the temporal change of the N-15 content of the receiver plant (Dichanthium aristatum). The study was carried out in greenhouse using two isotopic methods: N-15 leaf feeding (LF) and the natural N-15 abundance (NA). Measurements of exudate N-15 were made at several dates before and after tree pruning. A time-dependent box model was devised to quantify N transfer in time and to make comparisons between the isotopic methods. In NA, although tree roots and exudates presented a similar N-15 signature before tree pruning, exudates were strongly depleted in N-15 after pruning. In LF, exudates were always depleted in N-15 in relation to tree roots. Hence, the current assumption used in N transfer studies concerning the equal N-15/N-14 distribution in tissues of the donor plant and in its excreted N was not confirmed in our study. Before pruning, N transfer functioned as a two-N-source system (soil N and exudates N) and both isotopic methods provided similar estimates: 11-12% for LF and 10-15% for NA. Calculations per-formed with the model indicated that N transfer occurred with small or nil fractionation of N-15 in exudates. After pruning, there was a third N source associated with N released from tree root turnover. During this period, the isotopic signature of the receiver plant showed a transient state due to the progressive decrease of N-15 content of that N source. The amount of N derived from the tree represented 65% of the total N content of the. grass at the end of the experiments. (c) 2007 Elsevier B.V. All rights reserved.  
  Address INRA, Unite Agropedioclimat, UR135, Petit Bourg 97170, Guadeloupe, Email: jorge.sierra@antilles.inra.fr  
  Corporate Author Thesis  
  Publisher ELSEVIER SCIENCE BV Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1161-0301 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000249798900003 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 157  
Permanent link to this record
 

 
Author Ruelle, J.; Clair, B.; Beauchene, J.; Prevost, M.F.; Fournier, M. openurl 
  Title Tension wood and opposite wood in 21 tropical rain forest species 2. Comparison of some anatomical and ultrastructural criteria Type Journal Article
  Year 2006 Publication IAWA Journal Abbreviated Journal IAWA J.  
  Volume (down) 27 Issue 4 Pages 341-376  
  Keywords tension wood; opposite wood; tropical rain forest; vessels; wood anatomy; wood fibre  
  Abstract The anatomy of tension wood and opposite wood was compared in 21 tropical rain forest trees from 21 species belonging to 18 families from French Guyana. Wood specimens were taken from the upper and lower sides of naturally tilted trees. Measurement of the growth stress level ensured that the two samples were taken from wood tissues in a different mechanical state: highly tensile-stressed wood on the upper side, called tension wood and normally tensile-stressed wood on the lower side, called opposite wood. Quantitative parameters relating to fibres and vessels were measured on transverse sections of both tension and opposite wood to check if certain criteria can easily discriminate the two kinds of wood. We observed a decrease in the frequency of vessels in the tension wood in all the trees studied. Other criteria concerning shape and surface area of the vessels, fibre diameter or cell wall thickness did not reveal any general trend. At the ultrastructural level, we observed that the microfibril angle in the tension wood sample was lower than in opposite wood in all the trees except one (Licania membranacea).  
  Address UAG, ENGREF,UMR Ecol Forets Guyane, INRA,ECOFOG, CIRAD,CNRS, F-97379 Kourou, Guyana, Email: ruelle_j@kourou.cirad.fr  
  Corporate Author Thesis  
  Publisher INT ASSOC WOOD ANATOMISTS Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0928-1541 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000242437400001 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 171  
Permanent link to this record
 

 
Author Clair, B.; Ruelle, J.; Beauchene, J.; Prevost, M.F.; Fournier, M. openurl 
  Title Tension wood and opposite wood in 21 tropical rain forest species 1. Occurrence and efficiency of the G-layer Type Journal Article
  Year 2006 Publication IAWA Journal Abbreviated Journal IAWA J.  
  Volume (down) 27 Issue 3 Pages 329-338  
  Keywords gelatinous layer; G-layer; French Guyana; tropical rain forest; tension wood; wood anatomy  
  Abstract Wood samples were taken from the upper and lower sides of 21 naturally tilted trees from 18 families of angiosperms in the tropical rain forest in French Guyana. The measurement of growth stresses ensured that the two samples were taken from wood tissues in a different mechanical state: highly tensile stressed wood on the upper side, called tension wood, and lower tensile stressed wood on the lower side, called opposite wood. Eight species had tension wood fibres with a distinct gelatinous layer (G-layer). The distribution of gelatinous fibres varied from species to species. One of the species, Casearia javitensis (Flacourtiaceae), showed a peculiar multilayered secondary wall in its reaction wood. Comparison between the stress level and the occurrence of the G-layer indicates that the G-layer is not a key factor in the production of high tensile stressed wood.  
  Address UAG, INRA, ENGREF, CIRAD CNRS,ECOFOG,UMR Ecol Forets Guyane, F-97379 Kourou, Guyana, Email: clair@lmgc.univ-montp2.fr  
  Corporate Author Thesis  
  Publisher INT ASSOC WOOD ANATOMISTS Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0928-1541 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000240542400008 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 176  
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Author Fonty, E.; Molino, J.F.; Prevost, M.F.; Sabatier, D. openurl 
  Title A new case of neotropical monodominant forest: Spirotropis longifolia (Leguminosae-Papilionoideae) in French Guiana Type Journal Article
  Year 2011 Publication Journal of Tropical Ecology Abbreviated Journal J. Trop. Ecol.  
  Volume (down) 27 Issue 6 Pages 641-644  
  Keywords French Guiana; layering; monodominance; sprouting; supporting strategy; suppressive strategy; tropical rain forests  
  Abstract  
  Address [Fonty, E] ONF, Direct Reg Guyane, F-97300 Cayenne, France, Email: emile.fonty@free.fr  
  Corporate Author Thesis  
  Publisher Cambridge Univ Press Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0266-4674 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000296208500009 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 371  
Permanent link to this record
 

 
Author Chartier, M.; Pélozuelo, L.; Buatois, B.; Bessière, J.-M.; Gibernau, M. url  openurl
  Title Geographical variations of odour and pollinators, and test for local adaptation by reciprocal transplant of two European Arum species Type Journal Article
  Year 2013 Publication Functional Ecology Abbreviated Journal Funct. Ecol.  
  Volume (down) 27 Issue 6 Pages 1367-1381  
  Keywords Deception; Diptera; Floral scent; Geographical mosaic; Psychodidae; Sapromyophily; Transplant experiment  
  Abstract Interactions between entomophilous plants and their pollinators are one of the major factors shaping the evolution of floral features. As species are distributed in more or less connected populations, they have evolved in a geographical mosaic of co-evolution were the outcome of the plant-pollinator interaction is likely to vary as a result of local adaptations. Arum italicum and Arum maculatum are two species of Araceae which deceive their fly pollinators by mimicking the odour of their oviposition sites. Whereas A. italicum is known to be pollinated by flies belonging to different families (i.e. opportunist), A. maculatum relies on only two pollinating species of the family Psychodidae throughout its European repartition area (i.e. specialist). The interannual and geographical variations of pollinators and pollinator-attractive odours were described in several populations of the two species over two consecutive years. Furthermore, local adaptation to pollinators was tested by transplanting inflorescence-bearing plants between two different sites and by recording the number and composition of the insect fauna trapped inside the inflorescences during anthesis as a measure of a fitness component. Pollinators and pollinator-attractive odours of the two Arum species varied in time and space, but there was no clear odour structure between populations. When transplanted, inflorescences of both species trapped the same composition and number of insects as native inflorescences at a given site; this indicates that pollinator composition is highly dependent on the local availability of insects. No pattern of local adaptation was found for these two species, but local pollination conditions were shown to strongly affect the degree of geographical variations of these interactions. The lack of a clear odour geographical structure might be due to high gene flow or to similar selective pressures exerted by pollinators, and the high interindividual odour variation may be linked to the deceptive strategy adopted by the two plant species. © 2013 British Ecological Society.  
  Address Center for Functional and Evolutive Ecology, Université Montpellier 2, 1919 route de Mende, 34293 Montpellier, France  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 02698463 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 29 November 2013; Source: Scopus; Coden: Fecoe; doi: 10.1111/1365-2435.12122; Language of Original Document: English; Correspondence Address: Gibernau, M.; Joint Research Unit Ecology of Guiana Forests, CNRS-UMR 8172, Campus agronomique, BP 316, Kourou cedex, 97379, France; email: marc.gibernau@ecofog.gf; References: Ackerman, J.D., Cuevas, A.A., Hof, D., Are deception-pollinated species more variable than those offering a reward? (2011) Plant Systematics and Evolution, 293, pp. 91-99; Ackerman, J.D., Meléndez-Ackerman, E.J., Salguero-Faria, J., Variation in pollinator abundance and selection on fragrance phenotypes in an epiphytic orchid (1997) American Journal of Botany, 84, pp. 1383-1390; Adams, R.P., (2007) Identification of Essential Oil Components by Gas Chromatography/Mass Spectroscopy, , 4th edn. 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Rudall) Royal Botanical Gardens, Kew; Knudsen, J.T., Variation in floral scent composition within and between populations of Geonoma macrostachys (Arecaceae) in the western Amazon (2002) American Journal of Botany, 89, pp. 1772-1778; Knudsen, J.T., Eriksson, R., Gershenzon, J., Ståhl, B., Diversity and distribution of floral scent (2006) The Botanical Review, 72, pp. 1-120; Lack, A.J., Diaz, A., The pollination of Arum maculatum L. – a historical review and new observations (1991) Watsonia, 18, pp. 333-342; Levin, D.A., (2000) The Origin, Expansion and Demise of Plant Species, , Oxford University Press, Oxford; Levin, D.A., Anderson, W.W., Competition for pollinators between simultaneously flowering species (1970) The American Naturalist, 104, pp. 455-467; Linz, J., Stökl, J., Urru, I., Krügel, T., Stensmyr, M.C., Hansson, B.S., Molecular phylogeny of the genus Arum (Araceae) inferred from multi-locus sequence data and AFLPs (2010) Taxon, 59, pp. 405-415; Maia, A.C.D., Dötterl, S., Kaiser, R., Silberbauer-Gottsberger, I., Teichert, H., Gibernau, M., Navarro, D.M.D.F., Gottsberger, G., The key role of 4-methyl-5-vinylthiazole in the attraction of scarab beetle pollinators: a unique olfactory floral signal shared by Annonaceae and Araceae (2012) Journal of Chemical Ecology, 38, pp. 1072-1080; Maia, A.C.D., Gibernau, M., Dötterl, S., Navarro, DM., Seifert, K., Müller, T., Schlindwein, C., The floral scent of Taccarum ulei (araceae): attraction of scarab beetle pollinators to an unusual aliphatic acyloin (2013) Phytochemistry, , http://dx.doi.org/10.1016/j.phytochem.2013.03.005, (in press); Mant, J., Peakall, R., Schiestl, F.P., Does selection on floral odor promote differentiation among populations and species of the sexually deceptive orchid genus Ophrys? 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Author Denis, T.; Richard-Hansen, C.; Brunaux, O.; Etienne, M.-P.; Guitet, S.; Herault, B. doi  openurl
  Title Biological traits, rather than environment, shape detection curves of large vertebrates in neotropical rainforests Type Journal Article
  Year 2017 Publication Ecological Applications Abbreviated Journal Ecol Appl  
  Volume (down) 27 Issue 5 Pages 1564-1577  
  Keywords abundance; camouflage; distance sampling; encounter rate; French Guiana; hunting vulnerability; line transect; Neotropical terra firme rainforests; relative abundance  
  Abstract Line transect surveys are widely used in Neotropical rainforests to estimate the population abundance of medium- and large-sized vertebrates. The use of indices such as encounter rate has been criticized because the probability of animal detection may fluctuate due to the heterogeneity of environmental conditions among sites. In addition, the morphological and behavioral characteristics (biological traits) of species affect their detectability. In this study, we compared the extent to which environmental conditions and species’ biological traits bias abundance estimates in terra firme rainforests in French Guiana. The selected environmental conditions included both physical conditions and forest structure covariates, while the selected biological traits included the morphological and behavioral characteristics of species. We used the distance sampling method to model the detection probability as an explicit function of environmental conditions and biological traits and implemented a model selection process to determine the relative importance of each group of covariates. Biological traits contributed to the variability of animal detectability more than environmental conditions, which had only a marginal effect. Detectability was best for large animals with uniform or disruptive markings that live in groups in the canopy top. Detectability was worst for small, solitary, terrestrial animals with mottled markings. In the terra firme rainforests that represent ~80% of the Amazonia and Guianas regions, our findings support the use of relative indices such as the encounter rate to compare population abundance between sites in species-specific studies. Even though terra firme rainforests may appear similar between regions of Amazonia and the Guianas, comparability must be ensured, especially in forests disturbed by human activity. The detection probability can be used as an indicator of species’ vulnerability to hunting and, thus, to the risk of local extinction. Only a few biological trait covariates are required to correctly estimate the detectability of the majority of medium- and large-sized vertebrates. Thus, a biological trait model could be useful in predicting the detection probabilities of rare, uncommon, or localized species for which few data are available to fit the detection function.  
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  ISSN 1939-5582 ISBN Medium  
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  Call Number EcoFoG @ webmaster @ Serial 764  
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Author Bastin, J.-F.; Rutishauser, E.; Kellner, J.R.; Saatchi, S.; Pélissier, R.; Hérault, B.; Slik, F.; Bogaert, J.; De Cannière, C.; Marshall, A.R.; Poulsen, J.; Alvarez-Loyayza, P.; Andrade, A.; Angbonga-Basia, A.; Araujo-Murakami, A.; Arroyo, L.; Ayyappan, N.; de Azevedo, C.P.; Banki, O.; Barbier, N.; Barroso, J.G.; Beeckman, H.; Bitariho, R.; Boeckx, P.; Boehning-Gaese, K.; Brandão, H.; Brearley, F.Q.; Breuer Ndoundou Hockemba, M.; Brienen, R.; Camargo, J.L.C.; Campos-Arceiz, A.; Cassart, B.; Chave, J.; Chazdon, R.; Chuyong, G.; Clark, D.B.; Clark, C.J.; Condit, R.; Honorio Coronado, E.N.; Davidar, P.; de Haulleville, T.; Descroix, L.; Doucet, J.-L.; Dourdain, A.; Droissart, V.; Duncan, T.; Silva Espejo, J.; Espinosa, S.; Farwig, N.; Fayolle, A.; Feldpausch, T.R.; Ferraz, A.; Fletcher, C.; Gajapersad, K.; Gillet, J.-F.; Amaral, I.L. do; Gonmadje, C.; Grogan, J.; Harris, D.; Herzog, S.K.; Homeier, J.; Hubau, W.; Hubbell, S.P.; Hufkens, K.; Hurtado, J.; Kamdem, N.G.; Kearsley, E.; Kenfack, D.; Kessler, M.; Labrière, N.; Laumonier, Y.; Laurance, S.; Laurance, W.F.; Lewis, S.L.; Libalah, M.B.; Ligot, G.; Lloyd, J.; Lovejoy, T.E.; Malhi, Y.; Marimon, B.S.; Marimon Junior, B.H.; Martin, E.H.; Matius, P.; Meyer, V.; Mendoza Bautista, C.; Monteagudo-Mendoza, A.; Mtui, A.; Neill, D.; Parada Gutierrez, G.A.; Pardo, G.; Parren, M.; Parthasarathy, N.; Phillips, O.L.; Pitman, N.C.A.; Ploton, P.; Ponette, Q.; Ramesh, B.R.; Razafimahaimodison, J.-C.; Réjou-Méchain, M.; Rolim, S.G.; Saltos, H.R.; Rossi, L.M.B.; Spironello, W.R.; Rovero, F.; Saner, P.; Sasaki, D.; Schulze, M.; Silveira, M.; Singh, J.; Sist, P.; Sonke, B.; Soto, J.D.; de Souza, C.R.; Stropp, J.; Sullivan, M.J.P.; Swanepoel, B.; Steege, H. ter; Terborgh, J.; Texier, N.; Toma, T.; Valencia, R.; Valenzuela, L.; Ferreira, L.V.; Valverde, F.C.; Van Andel, T.R.; Vasque, R.; Verbeeck, H.; Vivek, P.; Vleminckx, J.; Vos, V.A.; Wagner, F.H.; Warsudi, P.P.; Wortel, V.; Zagt, R.J.; Zebaze, D. doi  openurl
  Title Pan-tropical prediction of forest structure from the largest trees Type Journal Article
  Year 2018 Publication Global Ecology and Biogeography Abbreviated Journal Global Ecol Biogeogr  
  Volume (down) 27 Issue 11 Pages 1366-1383  
  Keywords carbon; climate change; forest structure; large trees; pan-tropical; Redd+; tropical forest ecology  
  Abstract Abstract Aim Large tropical trees form the interface between ground and airborne observations, offering a unique opportunity to capture forest properties remotely and to investigate their variations on broad scales. However, despite rapid development of metrics to characterize the forest canopy from remotely sensed data, a gap remains between aerial and field inventories. To close this gap, we propose a new pan-tropical model to predict plot-level forest structure properties and biomass from only the largest trees. Location Pan-tropical. Time period Early 21st century. Major taxa studied Woody plants. Methods Using a dataset of 867 plots distributed among 118 sites across the tropics, we tested the prediction of the quadratic mean diameter, basal area, Lorey's height, community wood density and aboveground biomass (AGB) from the ith largest trees. Results Measuring the largest trees in tropical forests enables unbiased predictions of plot- and site-level forest structure. The 20 largest trees per hectare predicted quadratic mean diameter, basal area, Lorey's height, community wood density and AGB with 12, 16, 4, 4 and 17.7% of relative error, respectively. Most of the remaining error in biomass prediction is driven by differences in the proportion of total biomass held in medium-sized trees (50?70 cm diameter at breast height), which shows some continental dependency, with American tropical forests presenting the highest proportion of total biomass in these intermediate-diameter classes relative to other continents. Main conclusions Our approach provides new information on tropical forest structure and can be used to generate accurate field estimates of tropical forest carbon stocks to support the calibration and validation of current and forthcoming space missions. It will reduce the cost of field inventories and contribute to scientific understanding of tropical forest ecosystems and response to climate change.  
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  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1466-822x ISBN Medium  
  Area Expedition Conference  
  Notes doi: 10.1111/geb.12803 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 845  
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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 Insect Science  
  Volume (down) 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.
 
  Address  
  Corporate Author Thesis  
  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1672-9609 ISBN Medium  
  Area Expedition Conference  
  Notes doi: 10.1111/1744-7917.12597 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 885  
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