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| Author | Maréchaux, I.; Bartlett, M.K.; Sack, L.; Baraloto, C.; Engel, J.; Joetzjer, E.; Chave, J. | ||||
| Title | Drought tolerance as predicted by leaf water potential at turgor loss point varies strongly across species within an Amazonian forest | Type | Journal Article | ||
| Year | 2015 | Publication | Functional Ecology | Abbreviated Journal | Functional Ecology |
| Volume | 29 | Issue | 10 | Pages | 1268-1277 |
| Keywords | Climate change; French Guiana; Functional traits; Plant-water relations; Tropical trees; Wilting | ||||
| Abstract | Amazonian droughts are predicted to become increasingly frequent and intense, and the vulnerability of Amazonian trees has become increasingly documented. However, little is known about the physiological mechanisms and the diversity of drought tolerance of tropical trees due to the lack of quantitative measurements. Leaf water potential at wilting or turgor loss point (π<inf>tlp</inf>) is a determinant of the tolerance of leaves to drought stress and contributes to plant-level physiological drought tolerance. Recently, it has been demonstrated that leaf osmotic water potential at full hydration (π<inf>o</inf>) is tightly correlated with π<inf>tlp</inf>. Estimating π<inf>tlp</inf> from osmometer measurements of π<inf>o</inf> is much faster than the standard pressure-volume curve approach of π<inf>tlp</inf> determination. We used this technique to estimate π<inf>tlp</inf> for 165 trees of 71 species, at three sites within forests in French Guiana. Our data set represents a significant increase in available data for this trait for tropical tree species. Tropical trees showed a wider range of drought tolerance than previously found in the literature, π<inf>tlp</inf> ranging from -1·4 to -3·2 MPa. This range likely corresponds in part to adaptation and acclimation to occasionally extreme droughts during the dry season. Leaf-level drought tolerance varied across species, in agreement with the available published observations of species variation in drought-induced mortality. On average, species with a more negative π<inf>tlp</inf> (i.e. with greater leaf-level drought tolerance) occurred less frequently across the region than drought-sensitive species. Across individuals, π<inf>tlp</inf> correlated positively but weakly with leaf toughness (R2 = 0·22, P = 0·04) and leaf thickness (R2 = 0·03, P = 0·03). No correlation was detected with other functional traits (leaf mass per area, leaf area, nitrogen or carbon concentrations, carbon isotope ratio, sapwood density or bark thickness). The variability in π<inf>tlp</inf> among species indicates a potential for highly diverse species responses to drought within given forest communities. Given the weak correlations between π<inf>tlp</inf> and traditionally measured plant functional traits, vegetation models seeking to predict forest response to drought should integrate improved quantification of comparative drought tolerance among tree species. © 2015 British Ecological Society. | ||||
| Address | CNRM-GAME – URA1357, 42 avenue G. Coriolis, Toulouse, France | ||||
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Cited By :1; Export Date: 12 October 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 629 | ||
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| Author | Lamarre, G.P.A.; Amoretti, D.S.; Baraloto, C.; Bénéluz, F.; Mesones, I.; Fine, P.V.A. | ||||
| Title | Phylogenetic Overdispersion in Lepidoptera Communities of Amazonian White-sand Forests | Type | Journal Article | ||
| Year | 2016 | Publication | Biotropica | Abbreviated Journal | Biotropica |
| Volume | 48 | Issue | 1 | Pages | 101-109 |
| Keywords | varillales; Amazon basin; Bottom-up; Lepidoptera composition; Moth, Nymphalidae; Phylogenetic structure | ||||
| Abstract | In the Amazon basin and the Guiana Shield, white-sand (WS) forests are recognized as a low-resource habitat often composed by a distinct flora with many edaphic endemic plants. Small patches of nutrient-poor white-sand forests can pose a series of challenges to plants and animals. For plants, these challenges have been shown to function as strong filters that in turn drive taxonomic, functional and phylogenetic plant composition. However, very little is known about animal communities in WS forest and the effect that low-resource availability may have on higher trophic levels. Here, we investigate the diversity of both taxonomic and phylogenetic diversity of three Lepidoptera families' (Nymphalidae, Saturniidae, and Sphingidae) assemblages between low-resource (White-Sand Forest) and two adjacent high-resource habitats, terra firme clay and seasonally flooded forests. We found no clear effect of habitat type on taxonomic composition although butterfly and moth species abundance differed among the three contrasted habitats. The WS forest Lepidoptera community is significantly more phylogenetically overdispersed than expected by chance. We suggest that these low-resource habitats filter the number of plant lineages which, in turn, creates a bottom-up control structuring Lepidoptera phylogenetic structure. We recommend long-term sampling on Lepidoptera community both at larval and adult stages that may complement this study and test hypotheses linking herbivore phylogenetic structure to plant resource availability and trophic cascade theory. © 2016 The Association for Tropical Biology and Conservation. | ||||
| Address | Department of Biological Sciences, International Center for Tropical Botany, Florida International University, Miami, FL, United States | ||||
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Cited By :1; Export Date: 12 February 2016 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 661 | ||
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| Author | Hérault, B.; Piponiot, C. | ||||
| Title | Key drivers of ecosystem recovery after disturbance in a neotropical forest: Long-term lessons from the Paracou experiment, French Guiana | Type | Journal Article | ||
| Year | 2018 | Publication | Forest Ecosystems | Abbreviated Journal | Forest Ecosystems |
| Volume | 5 | Issue | 2 | Pages | |
| Keywords | Amazonia; Carbon fluxes; Climate change; Ecological resilience; Ecosystem modeling; Tropical forests | ||||
| Abstract | Background: Natural disturbance is a fundamental component of the functioning of tropical rainforests let to natural dynamics, with tree mortality the driving force of forest renewal. With ongoing global (i.e. land-use and climate) changes, tropical forests are currently facing deep and rapid modifications in disturbance regimes that may hamper their recovering capacity so that developing robust predictive model able to predict ecosystem resilience and recovery becomes of primary importance for decision-making: (i) Do regenerating forests recover faster than mature forests given the same level of disturbance? (ii) Is the local topography an important predictor of the post-disturbance forest trajectories? (iii) Is the community functional composition, assessed with community weighted-mean functional traits, a good predictor of carbon stock recovery? (iv) How important is the climate stress (seasonal drought and/or soil water saturation) in shaping the recovery trajectory? Methods: Paracou is a large scale forest disturbance experiment set up in 1984 with nine 6.25 ha plots spanning on a large disturbance gradient where 15 to 60% of the initial forest ecosystem biomass were removed. More than 70,000 trees belonging to ca. 700 tree species have then been censused every 2 years up today. Using this unique dataset, we aim at deciphering the endogenous (forest structure and composition) and exogenous (local environment and climate stress) drivers of ecosystem recovery in time. To do so, we disentangle carbon recovery into demographic processes (recruitment, growth, mortality fluxes) and cohorts (recruited trees, survivors). Results: Variations in the pre-disturbance forest structure or in local environment do not shape significantly the ecosystem recovery rates. Variations in the pre-disturbance forest composition and in the post-disturbance climate significantly change the forest recovery trajectory. Pioneer-rich forests have slower recovery rates than assemblages of late-successional species. Soil water saturation during the wet season strongly impedes ecosystem recovery but not seasonal drought. From a sensitivity analysis, we highlight the pre-disturbance forest composition and the post-disturbance climate conditions as the primary factors controlling the recovery trajectory. Conclusions: Highly-disturbed forests and secondary forests because they are composed of a lot of pioneer species will be less able to cope with new disturbance. In the context of increasing tree mortality due to both (i) severe droughts imputable to climate change and (ii) human-induced perturbations, tropical forest management should focus on reducing disturbances by developing Reduced Impact Logging techniques. | ||||
| Address | Université de la Guyane, UMR EcoFoG (AgroParistech, Cirad, CNRS, Inra, Université des Antilles), Campus Agronomique, Kourou, French Guiana, 97310, France | ||||
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Cited By :1; Export Date: 1 September 2018 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 812 | ||
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| Author | Dulormne, M.; Musseau, O.; Muller, F.; Toribio, A.; Bâ, A. | ||||
| Title | Effects of NaCl on growth, water status, N2 fixation, and ion distribution in Pterocarpus officinalis seedlings | Type | Journal Article | ||
| Year | 2010 | Publication | Plant and Soil | Abbreviated Journal | Plant and Soil |
| Volume | 327 | Issue | 1 | Pages | 23-34 |
| Keywords | Bradyrhizobium; Leaf water potential; Nodulation; Salt; Swamp forest | ||||
| Abstract | Pterocarpus officinalis (Fabaceae) dominates in the swamp forests of the Lesser Antilles, submitted to strong variations of soil salinity (30-445 mM). This study aimed to assess the effect of salinity on growth, nodulation, N2 fixation, water status and ions content in P. officinalis and to clarify the mechanisms involved. Seedlings inoculated or not with two strains from areas of contrasting salinity levels (< to 50 or 445 mM) were watered with 0, 171 and 342 mM solutions of NaCl in greenhouse conditions. Non-inoculated seedlings were tolerant to a salinity of 171 mM, with no significant effect on seedling biomass. Evapotranspiration per unit of leaf area (E/TLa) remained unchanged at 171 mM. Maintenance of a constant E/TLa and especially the control of ion transport to the upper parts of the plant could explain seedling salt tolerance up to intermediate salinity conditions (171 mM). The two strains have a 99.8% genetic identity in spite of differences in their original habitats, this explaining the similar response of the symbiosis to salinity. The higher salt sensitivity of inoculated seedlings was linked to the sensitivity of both Bradyrhizobium strains (reduction of free-living cells) and to that of the nodulation process (fewer nodules and inhibition of N2-fixation) to intermediate salinity. © Springer Science + Business Media B.V. 2009. | ||||
| Address | LSTM-UMR 113, Université des Antilles et de la Guyane, UFR des Sciences Exactes et Naturelles, B.P. 592, 97159 Pointe-à-Pitre, Guadeloupe (F.W.I.), France | ||||
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Cited By :12; Export Date: 7 February 2017 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 727 | ||
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| Author | Touchard, A.; Dauvois, M.; Arguel, M.-J.; Petitclerc, F.; Leblanc, M.; Dejean, A.; Orivel, J.; Nicholson, G.M.; Escoubas, P. | ||||
| Title | Elucidation of the unexplored biodiversity of ant venom peptidomes via MALDI-TOF mass spectrometry and its application for chemotaxonomy | Type | Journal Article | ||
| Year | 2014 | Publication | Journal of Proteomics | Abbreviated Journal | J. Proteomics |
| Volume | 105 | Issue | Pages | 217-231 | |
| Keywords | Ant venom; Chemotaxonomy; Maldi-Tof Ms; Peptide; Peptidome; Ponerinae; ant venom; cytochrome c oxidase; ant; article; biodiversity; chemotaxonomy; correlational study; DNA sequence; French Guiana; Hymenoptera; matrix assisted laser desorption ionization time of flight mass spectrometry; mitochondrial gene; nonhuman; Odontomachus biumbonatus; Odontomachus haematodus; Odontomachus hastatus; Odontomachus mayi; Odontomachus scalptus; Pachcondyla apicalis; Pachcondyla arhuaca; Pachcondyla commutata; Pachcondyla constricta; Pachcondyla crassinola; Pachcondyla goeldii; Pachcondyla inversa; Pachcondyla marginata; Pachcondyla procidua; Pachcondyla stigma; Pachcondyla verenae; Pachcondyla villosa; peptidomics; phylogeny; priority journal; Animalia; Formicidae; Hymenoptera; Odontomachus; Pachycondyla; Pachycondyla apicalis; Pachycondyla stigma; Ponerinae | ||||
| Abstract | The rise of integrative taxonomy, a multi-criteria approach used in characterizing species, fosters the development of new tools facilitating species delimitation. Mass spectrometric (MS) analysis of venom peptides from venomous animals has previously been demonstrated to be a valid method for identifying species. Here we aimed to develop a rapid chemotaxonomic tool for identifying ants based on venom peptide mass fingerprinting. The study focused on the biodiversity of ponerine ants (Hymenoptera: Formicidae: Ponerinae) in French Guiana. Initial experiments optimized the use of automated matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) to determine variations in the mass profiles of ant venoms using several MALDI matrices and additives. Data were then analyzed via a hierarchical cluster analysis to classify the venoms of 17 ant species. In addition, phylogenetic relationships were assessed and were highly correlated with methods using DNA sequencing of the mitochondrial gene cytochrome c oxidase subunit 1. By combining a molecular genetics approach with this chemotaxonomic approach, we were able to improve the accuracy of the taxonomic findings to reveal cryptic ant species within species complexes. This chemotaxonomic tool can therefore contribute to more rapid species identification and more accurate taxonomies. Biological significance: This is the first extensive study concerning the peptide analysis of the venom of both Pachycondyla and Odontomachus ants. We studied the venoms of 17 ant species from French Guiana that permitted us to fine-tune the venom analysis of ponerine ants via MALDI-TOF mass spectrometry. We explored the peptidomes of crude ant venom and demonstrated that venom peptides can be used in the identification of ant species. In addition, the application of this novel chemotaxonomic method combined with a parallel genetic approach using COI sequencing permitted us to reveal the presence of cryptic ants within both the Pachycondyla apicalis and Pachycondyla stigma species complexes. This adds a new dimension to the search for means of exploiting the enormous biodiversity of venomous ants as a source for novel therapeutic drugs or biopesticides. This article is part of a Special Issue entitled: Proteomics of non-model organisms. © 2014 Elsevier B.V. | ||||
| Address | Neurotoxin Research Group, School of Medical and Molecular Biosciences, University of Technology, Sydney, NSW, Australia | ||||
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| Publisher | Elsevier | Place of Publication | Editor | ||
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| ISSN | 18767737 (Issn) | ISBN | Medium | ||
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Cited By (since 1996):1; Export Date: 30 July 2014; Correspondence Address: Touchard, A.; UMR-EcoFoG, Campus Agronomique, BP 316, 97379 Kourou Cedex, France; email: axel.touchard@ecofog.gf; Chemicals/CAS: cytochrome c oxidase, 72841-18-0, 9001-16-5 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 555 | ||
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| Author | Rowland, L.; Hill, T.C.; Stahl, C.; Siebicke, L.; Burban, B.; Zaragoza-Castells, J.; Ponton, S.; Bonal, D.; Meir, P.; Williams, M. | ||||
| Title | Evidence for strong seasonality in the carbon storage and carbon use efficiency of an Amazonian forest | Type | Journal Article | ||
| Year | 2014 | Publication | Global Change Biology | Abbreviated Journal | Global Change Biol. |
| Volume | 20 | Issue | 3 | Pages | 979-991 |
| Keywords | Carbon use efficiency; Dalec; Data assimilation; Ecosystem respiration; French Guiana; Seasonal carbon fluxes; Tropical forest | ||||
| Abstract | The relative contribution of gross primary production and ecosystem respiration to seasonal changes in the net carbon flux of tropical forests remains poorly quantified by both modelling and field studies. We use data assimilation to combine nine ecological time series from an eastern Amazonian forest, with mass balance constraints from an ecosystem carbon cycle model. The resulting analysis quantifies, with uncertainty estimates, the seasonal changes in the net carbon flux of a tropical rainforest which experiences a pronounced dry season. We show that the carbon accumulation in this forest was four times greater in the dry season than in the wet season and that this was accompanied by a 5% increase in the carbon use efficiency. This seasonal response was caused by a dry season increase in gross primary productivity, in response to radiation and a similar magnitude decrease in heterotrophic respiration, in response to drying soils. The analysis also predicts increased carbon allocation to leaves and wood in the wet season, and greater allocation to fine roots in the dry season. This study demonstrates implementation of seasonal variations in parameters better enables models to simulate observed patterns in data. In particular, we highlight the necessity to simulate the seasonal patterns of heterotrophic respiration to accurately simulate the net carbon flux seasonal tropical forest. © 2013 The Authors Global Change Biology Published by John Wiley & Sons Ltd. | ||||
| Address | Research School of Biology, Division of Plant Sciences, Australian National University, Canberra, ACT, 0200, Australia | ||||
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| ISSN | 13541013 (Issn) | ISBN | Medium | ||
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Cited By (since 1996):1; Export Date: 24 February 2014; Source: Scopus; Language of Original Document: English; Correspondence Address: Rowland, L.; School of Geosciences, University of Edinburgh, Edinburgh, EH9 3JN, United Kingdom; email: lucy.rowland@ed.ac.uk; Funding Details: FT110100457, ARC, Australian Research Council; Funding Details: NE/F002149/1, NERC, Natural Environment Research Council; Funding Details: NE/J011002/1, NERC, Natural Environment Research Council | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 529 | ||
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| Author | Fournier, M.; Dlouhá, J.; Jaouen, G.; Almeras, T. | ||||
| Title | Integrative biomechanics for tree ecology: Beyond wood density and strength | Type | Journal Article | ||
| Year | 2013 | Publication | Journal of Experimental Botany | Abbreviated Journal | J. Exp. Bot. |
| Volume | 64 | Issue | 15 | Pages | 4793-4815 |
| Keywords | Biomechanics; Ecological strategy; Gravitropism; Shape; Size; Trees; Wood | ||||
| Abstract | Functional ecology has long considered the support function as important, but its biomechanical complexity is only just being elucidated. We show here that it can be described on the basis of four biomechanical traits, two safety traits against winds and self-buckling, and two motricity traits involved in sustaining an upright position, tropic motion velocity (MV) and posture control (PC). All these traits are integrated at the tree scale, combining tree size and shape together with wood properties. The assumption of trait constancy has been used to derive allometric scaling laws, but it was more recently found that observing their variations among environments and functional groups, or during ontogeny, provides more insights into adaptive syndromes of tree shape and wood properties. However, oversimpli-fed expressions have often been used, possibly concealing key adaptive drivers. An extreme case of oversimplification is the use of wood basic density as a proxy for safety. Actually, as wood density is involved in stiffiness, loads, and construction costs, the impact of its variations on safety is non-trivial. Moreover, other wood features, especially the microfibril angle (MFA), are also involved. Furthermore, wood is not only stiff and strong, but it also acts as a motor for MV and PC. The relevant wood trait for this is maturation strain asymmetry. Maturation strains vary with cell-wall characteristics such as MFA, rather than with wood density. Finally, the need for further studies about the ecological relevance of branching patterns, motricity traits, and growth responses to mechanical loads is discussed. © The Author 2013. | ||||
| Address | CNRS, Université de Montpellier 2, Laboratoire de Mécanique et Génie Civil, 34095 Montpellier, France | ||||
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| ISSN | 00220957 (Issn) | ISBN | Medium | ||
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Cited By (since 1996):1; Export Date: 2 December 2013; Source: Scopus; Coden: Jeboa; doi: 10.1093/jxb/ert279; Language of Original Document: English; Correspondence Address: Fournier, M.; AgroParisTech, UMR 1092 LERFOB, 54000 Nancy, France; email: meriem.fournier@agroparistech.fr; References: Achim, A., Ruel, J.C., Gardiner, B.A., Lafamme, G., Meunier, S., Modelling the vulnerability of balsam fr forests to wind damage (2005) Forest Ecology and Management, 204, pp. 35-50; Almeras, T., Costes, E., Salles, J.C., Identification of biomechanical factors involved in stem shape variability between apricot-tree varieties (2004) Annals of Botany, 93, pp. 1-14; Almeras, T., Derycke, M., Jaouen, G., Beauchene, J., Fournier, M., Functional diversity in gravitropic reaction among tropical seedlings in relation to ecological and developmental traits (2009) Journal of Experimental Botany, 60, pp. 4397-4410; Almeras, T., Fournier, M., Biomechanical design and longterm stability of trees: Morphological and wood traits involved in the balance between weight increase and the gravitropic reaction (2009) Journal of Theoretical Biology, 256, pp. 370-381; Almeras, T., Gril, J., Costes, E., Bending of apricot tree branches under the weight of axillary growth: Test of a mechanical model with experimental data (2002) Trees – Structure and Function, 16, pp. 5-15; Almeras, T., Thibaut, A., Gril, J., Effect of circumferential heterogeneity of wood maturation strain, modulus of elasticity and radial growth on the regulation of stem orientation in trees (2005) Trees – Structure and Function, 19, pp. 457-467; Anten, N.P.R., Schieving, F., The role of wood mass density and mechanical constraints in the economy of tree architecture (2010) American Naturalist, 175, pp. 250-260; Archer, R.R., Wilson, B.F., Mechanics of the compression wood response II. 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| Call Number | EcoFoG @ webmaster @ | Serial | 513 | ||
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| Author | Porth, I.; Scotti-Saintagne, C.; Barreneche, T.; Kremer, A.; Burg, K. | ||||
| Title | Linkage mapping of osmotic stress induced genes of oak | Type | Journal Article | ||
| Year | 2005 | Publication | Tree Genetics and Genomes | Abbreviated Journal | Tree Genet. Genomes |
| Volume | 1 | Issue | 1 | Pages | 31-40 |
| Keywords | Est; Linkage map; Oak; Osmotic stress; Quercus ssp.; Fagaceae; Quercus; Quercus petraea; Quercus robur | ||||
| Abstract | Water stress affecting long-lived trees is an important challenge in forestry. Due to global climate change, forest trees will be threatened by extreme conditions like flooding or drought. It is necessary to understand differences in stress tolerance within certain species and to investigate putative relations on genomic level. In this study, osmotic stress induced genes of Quercus ssp. were positioned on two genetic linkage maps of oak. An intra-specific cross 3P*A4 of Quercus robur consisting of 88 offspring and an inter-specific cross 11P*QS29 of Q. robur and Q. petraea comprising 72 full-sibs were analyzed for the inheritance of 14 loci represented by 34 individual single nucleotide polymorphisms. Seven genes in the intra-cross, as well as other six genes in the inter-cross could be mapped and one gene could not be localised due to the severe distortion of the segregation. The collection of expressed sequences involved ribosomal proteins, members of the oxylase/oxygenase gene family, betaine aldehyde dehydrogenase, Dc3 promoter-binding factor, a putative member of the nodulin family, glutathione-S-transferase and proteins with unknown functions. In the inter-cross, two linked markers exhibited 89% deficiency of heterozygosity. Thirteen genes were positioned on ten different oak chromosomes and can serve as orthologous markers in comparative mapping studies within Fagaceae. © Springer-Verlag 2005. | ||||
| Address | INRA BIOGECO, 69 Route d'Arcachon, 33612 Cestas, France | ||||
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| ISSN | 16142942 (Issn) | ISBN | Medium | ||
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Cited By (since 1996): 9; Export Date: 22 October 2011; Source: Scopus; doi: 10.1007/s11295-005-0005-1; Language of Original Document: English; Correspondence Address: Burg, K.; Division of Biogenetics and Natural Resources, Austrian Research Center Seibersdorf, 2444 Seibersdorf, Austria; email: kornel.burg@arcs.ac.at | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 357 | ||
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| Author | Dejean, A.; Delabie, J.H.C.; Cerdan, P.; Gibernau, M.; Corbara, B. | ||||
| Title | Are myrmecophytes always better protected against herbivores than other plants? | Type | Journal Article | ||
| Year | 2006 | Publication | Biological Journal of the Linnean Society | Abbreviated Journal | Biol. J. Linn. Soc. |
| Volume | 89 | Issue | 1 | Pages | 91-98 |
| Keywords | Ant-plant mutualism; Azteca; Maieta; Myrmecophytes; Plant protection; Tococa; ant; defoliation; field method; mutualism; myrmecophyte; plant-herbivore interaction; Azteca; Azteca bequaerti; Clidemia; Crematogaster laevis; Formicidae; Maieta; Maieta guianensis; Pheidole minutula; Tococa; Tococa guianensis | ||||
| Abstract | The present field study compared the degree of defoliation of three Guianian melastome, two myrmecophytes (i.e. plants sheltering ants in hollow structures) and Clidemia sp., a nonmyrmecophytic plant serving as a control. Maieta guianensis Aubl. hosted mostly Pheidole minutula Mayr whatever the area, whereas Tococa guianensis Aubl. hosted mostly Azteca bequaerti Wheeler along streams and Crematogaster laevis Mayr or Azteca sp. 1 in the understory where it never blossomed. Only Tococa, when sheltering A. bequaerti in what can be considered as a truly mutualistic relationship, showed significantly less defoliation than control plants. In the other associations, the difference was not significant, but P. minutula is mutualistic with Maieta because it furnishes some protection (exclusion experiments) plus nutrients (previous studies). When devoid of ants, Tococa showed significantly greater defoliation than control plants; therefore, it was deduced that Tococa probably lacks certain antidefoliator metabolites that control plants possess (both Tococa and control plants are protected by ground-nesting, plant-foraging ants, which is termed 'general myrmecological protection'). Consequently, plant-ants other than A. bequaerti probably also protect Tococa slightly, thus compensating for this deficiency and permitting it to live in the understory until treefall gaps provide the conditions necessary for seed production. © 2006 The Linnean Society of London. | ||||
| Address | Laboratoire de Psychologie Sociale de la Cognition (UMR CNRS 6024), Université Blaise Pascal, 34 avenue Carnot, 63037 Clermont-Ferrand Cedex, France | ||||
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| ISSN | 00244066 (Issn) | ISBN | Medium | ||
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| Notes |
Cited By (since 1996): 9; Export Date: 22 October 2011; Source: Scopus; Coden: Bjlsb; doi: 10.1111/j.1095-8312.2006.00660.x; Language of Original Document: English; Correspondence Address: Dejean, A.; Laboratoire d'Evolution et Diversité Biologique (UMR CNRS 5174), Université Toulouse III, Bâtiment 4R3, 118 route de Narbonne, 31062 Toulouse Cedex, France; email: dejean@cict.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 355 | ||
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| Author | Dejean, A.; Moreau, C.S.; Uzac, P.; Le Breton, J.; Kenne, M. | ||||
| Title | The predatory behavior of Pheidole megacephala | Type | Journal Article | ||
| Year | 2007 | Publication | Comptes Rendus Biologies | Abbreviated Journal | C. R. Biol. |
| Volume | 330 | Issue | 9 | Pages | 701-709 |
| Keywords | Invasive ants; Landmarks; Pheidole megacephala; Predatory behavior; Recruitment; pheromone; ant; behavioral ecology; foraging behavior; invasive species; nest predation; pheromone; predator-prey interaction; animal experiment; ant; article; competitor species; controlled study; foraging behavior; host range; Isoptera; nest predation; nonhuman; predation; predator prey interaction; prey selection; species invasion; worker (insect); Animals; Ants; Feeding Behavior; Female; Isoptera; Predatory Behavior; Social Behavior; Formicidae; Hexapoda; Isoptera; Pheidole megacephala | ||||
| Abstract | We studied the foraging and predatory behaviors of the invasive African myrmicine ant, Pheidole megacephala (F.) in its native range. Workers can singly capture a wide range of insects, including relatively large prey items. For still larger prey, they recruit at short range those nestmates situated within reach of an alarm pheromone and together spread-eagle the insect. These behaviors are complimented by a long-range recruitment (of nestmates remaining in the nest) based on prey size. P. megacephala scouts also use long-range recruitment when they detect the landmarks of termites and competing ant species, thus permitting them to avoid confronting these termites and ants solitarily. | ||||
| Address | Département de biologie des organismes animaux, faculté des sciences, l'université de Douala, BP 24157, Douala, Cameroon | ||||
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| Language | Summary Language | Original Title | |||
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| ISSN | 16310691 (Issn) | ISBN | Medium | ||
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| Notes |
Cited By (since 1996): 8; Export Date: 22 October 2011; Source: Scopus; Coden: Crboc; doi: 10.1016/j.crvi.2007.06.005; PubMed ID: 17720587; Language of Original Document: English; Correspondence Address: Dejean, A.; CNRS-Guyane, UPS 2561, UMR-CNRS 5174, 16, avenue André-Aron, 97300 Cayenne, France; email: alain.dejean@wanadoo.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 354 | ||
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