| Home | [61–70] << 71 72 73 74 75 76 77 78 79 80 >> [81–90] |
|
| Records | |||||
|---|---|---|---|---|---|
| Author | Dutech, C.; Joly, H.I.; Jarne, P. | ||||
| Title | Gene flow, historical population dynamics and genetic diversity within French Guianan populations of a rainforest tree species, Vouacapoua americana | Type | Journal Article | ||
| Year | 2004 | Publication | Heredity | Abbreviated Journal | Heredity |
| Volume | 92 | Issue | 2 | Pages  |
69-77 |
| Keywords | bottleneck; climatic change; extinction-recolonization; microsatellite; neotropical rainforest; pollen and seed dispersal | ||||
| Abstract | Both gene flow and historical events influence the genetic diversity of natural populations. One way to understand their respective impact is to analyze population genetic structure at large spatial scales. We studied the distribution of genetic diversity of 17 populations of Vouacapoua americana (Caesalpiniaceae) in French Guiana, using nine micro satellite loci. Low genetic diversity was observed within populations, with a mean allelic richness and gene diversity of 4.1 and 0.506, respectively, which could be due to low effective population size and/or past bottlenecks. Using the regression between F-st/(1-F-st), estimated between pairs of populations, and the logarithm of the geographical distance, the spatial genetic structure can partly be explained by isolation-by-distance and limited gene flow among populations. This result is in agreement with the species' biology, including seed and pollen dispersal by rodents and insects, respectively. In contrast, no clear genetic signal of historical events was found when examining genetic differentiation among populations in relation to biogeographical hypotheses or by testing for bottlenecks within populations. Our conclusion is that nuclear spatial genetic structure of V. americana, at the geographic scale of French Guiana, is better explained by gene flow rather than by historical events. | ||||
| Address | Cirad Foret Silvolab, Lab Genet & Ecol Mol, F-97387 Kourou, France, Email: cdutech@bordeaux.inra.fr | ||||
| Corporate Author | Thesis | ||||
| Publisher | NATURE PUBLISHING GROUP | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0018-067X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000188431700003 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 240 | ||
| Permanent link to this record | |||||
| Author | Gourlet-Fleury, S.; Comu, G.; Jesel, S.; Dessard, H.; Jourget, J.G.; Blanc, L.; Picard, N. | ||||
| Title | Using models to predict recovery and assess tree species vulnerability in logged tropical forests: A case study from French Guiana | Type | Journal Article | ||
| Year | 2005 | Publication | Forest Ecology and Management | Abbreviated Journal | For. Ecol. Manage. |
| Volume | 209 | Issue | 1-2 | Pages |
69-86 |
| Keywords | matrix model; individual-based spatially explicit model; regeneration; recruitment; long-term population dynamics | ||||
| Abstract | A major challenge for forest managers is to define the optimal cutting cycle to ensure that the resource is sustained in the long term. Matrix models of forest dynamics allow time-projection of diameter-class distributions and thus assessment of the time needed, after logging, to recover a given part of the exploitable stock. They are easy to build and they only require, as input variables, the diameter structure of the population(s) under scope. However, such models are based on a coarse description of tree population dynamics and must be used with caution. In particular, as trees are only described from a diameter threshold (usually 10 cm dbh), recruitment of a new tree cannot be linked with the preceding generation since too much time elapsed between seed dispersal and the installation of a 10-cm recruit. This causes predictions of matrix models to be highly questionable in the long term when ingrowth to larger dbh classes greatly depends on the way recruitment has been modelled. We used a case study from French Guiana to test whether or not a simple matrix model is reliable enough to help forest managers choose between management alternatives. We focused on the major timber species Dicorynia guianensis Amshoff (Caesalpiniaceae) harvested under a selective cutting regime. We compared predictions of D. guianensis stock recovery in the short and long term provided by two models: StoMat, a non-regulated matrix model, and SELVA, a single-tree distance dependent model explicitly simulating the entire species life cycle. Both models were independently calibrated on data from Paracou permanent sample plots. We showed that: (i) the short-term recovery of the exploitable stock predicted by StoMat is reliable for a large range of disturbance conditions; (ii) recruitment implementation in StoMat does not influence projections until the third felling cycle; (iii) for shared initial stand conditions SELVA and StoMat give consistent mid- and long-term predictions: the simple recruitment model used into StoMat could efficiently summarise the regeneration processes of the species under low felling intensity. Our results indicate that the current felling regime used in French Guiana may not be sustainable on a long-term basis. In any case, no more than 60% of the initial stock would be recovered after logging. We conclude that simple models can provide as reliable predictions as more complicated ones. They may be sufficient to assess the recovery of a species' exploitable stock even in the long term, or at least assess the (un)sustainability of particular harvesting regimes. (c) 2005 Elsevier B.V. All rights reserved. | ||||
| Address | CIRAD, Dept Forets, F-34398 Montpellier 5, France, Email: sylvie.gourlet-fleury@cirad.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 | 0378-1127 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000228504600007 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 257 | ||
| Permanent link to this record | |||||
| Author | Scotti, I.; González-Martínez, S.C.; Budde, K.B.; Lalague, H. | ||||
| Title | Fifty years of genetic studies: what to make of the large amounts of variation found within populations? | Type | Journal Article | ||
| Year | 2016 | Publication | Annals of Forest Science | Abbreviated Journal | Annals of Forest Science |
| Volume | 73 | Issue | 1 | Pages |
69-75 |
| Keywords | Intra-specific variation; Microgeography; Natural selection; Population genomics | ||||
| Abstract | |||||
| Address | INRA, UMR745 Ecologie des Forêts de Guyane, Campus Agronomique, Kourou, French Guiana | ||||
| 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 | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Export Date: 7 March 2016 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 667 | ||
| Permanent link to this record | |||||
| Author | Touchard, A.; Labrière, N.; Roux, O.; Petitclerc, F.; Orivel, J.; Escoubas, P.; Koh, J.M.S.; Nicholson, G.M.; Dejean, A. | ||||
| Title | Venom toxicity and composition in three Pseudomyrmex ant species having different nesting modes | Type | Journal Article | ||
| Year | 2014 | Publication | Toxicon | Abbreviated Journal | Toxicon |
| Volume | 88 | Issue | Pages |
67-76 | |
| Keywords | Ant venoms; Ants; Arboreal and ground-nesting ants; Evolution; Peptides; Pseudomyrmex; ant venom; acute toxicity; animal experiment; ant; article; biochemical composition; controlled study; disulfide bond; high performance liquid chromatography; lethality; matrix assisted laser desorption ionization time of flight mass spectrometry; molecular weight; myrmecophyte; nesting; nonhuman; predator prey interaction; priority journal; Pseudomyrmex gracilis; Pseudomyrmex penetrator; Pseudomyrmex termitarius; species diversity; toxin analysis | ||||
| Abstract | We aimed to determine whether the nesting habits of ants have influenced their venom toxicity and composition. We focused on the genus Pseudomyrmex (Pseudomyrmecinae) comprising terrestrial and arboreal species, and, among the latter, plant-ants that are obligate inhabitants of myrmecophytes (i.e., plants sheltering ants in hollow structures). Contrary to our hypothesis, the venom of the ground-dwelling species, Pseudomyrmex termitarius, was as efficacious in paralyzing prey as the venoms of the arboreal and the plant-ant species, Pseudomyrmexpenetrator and Pseudomyrmexgracilis. The lethal potency of P. termitarius venom was equipotent with that of P. gracilis whereas the venom of P. penetrator was less potent. The MALDI-TOF MS analysis of each HPLC fraction of the venoms showed that P. termitarius venom is composed of 87 linear peptides, while both P. gracilis and P. penetrator venoms (23 and 26 peptides, respectively) possess peptides with disulfide bonds. Furthermore, P. penetrator venom contains three hetero- and homodimeric peptides consisting of two short peptidic chains linked together by two interchain disulfide bonds. The large number of peptides in P. termitarius venom is likely related to the large diversity of potential prey plus the antibacterial peptides required for nesting in the ground. Whereas predation involves only the prey and predator, P. penetrator venom has evolved in an environment where trees, defoliating insects, browsing mammals and ants live in equilibrium, likely explaining the diversity of the peptide structures. © 2014 Elsevier Ltd. All rights reserved. | ||||
| Address | Laboratoire Écologie Fonctionnelle et Environnement, 118 Route de Narbonne, 31062 Toulouse, France | ||||
| Corporate Author | Thesis | ||||
| Publisher | Elsevier Ltd | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 18793150 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Export Date: 30 July 2014; Coden: Toxia; Correspondence Address: Labrière, N.; CNRS, UMR Ecologie des Forêts de Guyane (EcoFoG), Campus Agronomique, BP 316, 97379 Kourou cedex, France | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 553 | ||
| Permanent link to this record | |||||
| Author | Rossi, V.;Dolley, T.; Cornu, G.; Guitet, S.;Herault, B. | ||||
| Title | GuyaSim : un outil d’aide à la décision pour l’aménagement d’un territoire forestier, la Guyane | Type | Journal Article | ||
| Year | 2015 | Publication | Bois et Forets des Tropiques | Abbreviated Journal | |
| Volume | 326 | Issue | 4 | Pages |
67-78 |
| Keywords | GIS software; scenarios; ecosystem services; simulator; biodiversity; carbon stock; biomass; logging; deforestation; land use changes; tropical forest; French Guiana | ||||
| Abstract | Planning policies for rapid development in French Guiana will require the conversion of forested areas, thus contributing to glo- bal warming. Guiana’s policy-makers will need to integrate the preservation of eco- system services into their planning deci- sions. The GuyaSim project was conduc- ted to produce more in-depth knowledge on these services (carbon sequestration, biodiversity and soil quality) and to trans- fer a software application, GuyaSim, to policy-makers to facilitate the use of this knowledge in the development of plan- ning policies. This article presents the characteristics of the application. Guya- Sim is a freeware package of the GIS type designed initially for local authority plan- ners and forestry departments in French Guiana. The application has two main functions:
information delivery and sup- port for planning decisions. The informa- tion provided includes socio-economic development scenarios, climate scenarios and valuations of ecosystem services. The decision-support component consists of tools for building planning scenarios (land use changes) and forestry scenarios (log- ging), with information on their environ- mental impacts. The functionalities of the software are currently limited by the state of knowledge on Guiana’s ecosystems. Advances made through current research projects are expected to upgrade the application in the medium term. |
||||
| Address | |||||
| 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 | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 666 | ||
| Permanent link to this record | |||||
| Author | Heuertz, M.; Caron, H.; Scotti-Saintagne, C.; Pétronelli, P.; Engel, J.; Tysklind, N.; Miloudi, S.; Gaiotto, F.A.; Chave, J.; Molino, J.-F.; Sabatier, D.; Loureiro, J.; Budde, K.B. | ||||
| Title | The hyperdominant tropical tree Eschweilera coriacea (Lecythidaceae) shows higher genetic heterogeneity than sympatric Eschweilera species in French Guiana | Type | Journal Article | ||
| Year | 2020 | Publication | Plant Ecology and Evolution | Abbreviated Journal | Plant Ecol. Evol. |
| Volume | 153 | Issue | 1 | Pages |
67-81 |
| Keywords | Cryptic species; Eschweilera; Hyperdominant tropical trees; Microsatellites; Species complex; Species delimitation | ||||
| Abstract | Background and aims – The evolutionary history of Amazonia’s hyperabundant tropical tree species, also known as “hyperdominant” species, remains poorly investigated. We assessed whether the hyperdominant Eschweilera coriacea (DC.) S.A.Mori (Lecythidaceae) represents a single genetically cohesive species, and how its genetic constitution relates to other species from the same clade with which it occurs sympatrically in French Guiana. Methods – We sampled 152 individuals in nine forest sites in French Guiana, representing 11 species of the genus Eschweilera all belonging to the Parvifolia clade, with emphasis on E. coriacea. Samples were genotyped at four simple sequence repeat (SSR) markers. We delimited gene pools, i.e., genetically coherent putative taxa, using STRUCTURE software and principal component analysis. We compared the genetic assignment of individuals with their morphological species determination and estimated genetic diversity and differentiation for gene pools and species. We also estimated genome size using flow cytometry. Key results – SSR profiles commonly displayed up to four alleles per genotype, suggesting that the investigated Eschweilera species bear a paleopolyploid signature. Flow cytometry suggested that the studied species are diploid with haploid genome sizes of 871–1046 Mbp. We detected five gene pools and observed a good correspondence between morphological and genetic delimitation for Eschweilera sagotiana Miers and the undescribed morphospecies E. sp. 3 (which resembles E. grandiflora (Aubl.) Sandwith), and to a lesser extent for E. decolorans Sandwith and E. micrantha (O.Berg) Miers. Eschweilera coriacea was the most genetically diverse species and included individuals assigned to each gene pool. Conclusions – We found no conclusive evidence for cryptic species within E. coriacea in French Guiana. SSRs detected fewer gene pools than expected based on morphology in the Parvifolia clade but discriminated evolutionary relationships better than available plastid markers. A positive trend between demographic abundance of species and allelic richness illustrates that hyperdominants may have a high evolutionary potential. This hypothesis can be tested using more powerful genomic data in combination with tree phenotypic trait variation and characterization of niche breadth, to enhance our understanding of the causes of hyperdominance in Amazonian trees. | ||||
| Address | University of Copenhagen, Forest, Nature and Biomass, Rolighedsvej 23, Frederiksberg C, DK-1958, Denmark | ||||
| Corporate Author | Thesis | ||||
| Publisher | Societe Royale de Botanique de Belgique | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 20323913 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 928 | ||
| Permanent link to this record | |||||
| Author | Conte, D.E.; Aboulaich, A.; Robert, F.; Olivier-Fourcade, J.; Jumas, J.C.; Jordy, C.; Willmann, P. | ||||
| Title | Sn-x[BPO4](1-x) composites as negative electrodes for lithium ion cells: Comparison with amorphous SnB0.6P0.4O2.9 and effect of composition | Type | Journal Article | ||
| Year | 2010 | Publication | Journal of Solid State Chemistry | Abbreviated Journal | J. Solid State Chem. |
| Volume | 183 | Issue | 1 | Pages |
65-75 |
| Keywords | Sn-based composites; Lithium-ion batteries; Negative electrodes; Mossbauer spectroscopy; LixSn alloys | ||||
| Abstract | A comparative study of two Sn-based composite materials as negative electrode for Li-ion accumulators is presented. The former SnB0.6P0.4O2.9 obtained by in-situ dispersion of SnO in an oxide matrix is shown to be an amorphous tin composite oxide (ATCO). The latter Sn-0.72[BPO4](0.28) obtained by ex-situ dispersion of Sri in a borophosphate matrix consists of Sri particles embedded in a crystalline BPO4 matrix. The electrochemical responses of ATCO and Sn-0.72.[BPO4](0.28) composite in galvanostatic mode show reversible capacities of about 450 and 530 mAhg(-1), respectively, with different irreversible capacities (60% and 29%). Analysis of these composite materials by Sn-119 Mossbauer spectroscopy in transmission (TMS) and emission (CEMS) modes confirms that ATCO is an amorphous Sn-II composite oxide and shows that in the case of Sn-0.72[BPO4](0.28), the Surface of the tin clusters is mainly formed by Sn-II in an amorphous interface whereas the bulk of the clusters is mainly formed by Sn-0. The determination of the recoilless free fractions f (Lamb-Mossbauer factors) leads to the effective fraction of both Sn-0 and Sn-II species in such composites. The influence of chemical composition and especially of the surface-to-bulk tin species ratio oil the electrochemical behaviour has been analysed for several Sn-x[BPO4](1-x) composite materials (0.17 < x < 0.91). The cell using the compound Sn-0.72[BPO4](0.28) as active material exhibits interesting electrochemical performances (reversible capacity of 500 mAh g(-1) at C/5 rate). (C) 2009 Elsevier Inc. All rights reserved. | ||||
| Address | [Conte, Donato Ercole; Aboulaich, Abdelmaula; Robert, Florent; Olivier-Fourcade, Josette; Jumas, Jean-Claude] Univ Montpellier 2, CNRS, UMR 5253,Inst Charles Gerhardt, Equipe Agregats Interfaces & Mat Energie, F-34095 Montpellier, France, Email: iguanasornione@libero.it | ||||
| Corporate Author | Thesis | ||||
| Publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0022-4596 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000273834600010 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 83 | ||
| Permanent link to this record | |||||
| Author | Maron, P.A.; Schimann, H.; Ranjard, L.; Brothier, E.; Domenach, A.M.; Lensi, R.; Nazaret, S. | ||||
| Title | Evaluation of quantitative and qualitative recovery of bacterial communities from different soil types by density gradient centrifugation | Type | Journal Article | ||
| Year | 2006 | Publication | European Journal of Soil Biology | Abbreviated Journal | Eur. J. Soil Biol. |
| Volume | 42 | Issue | 2 | Pages |
65-73 |
| Keywords | bacterial community; soil; density gradient; DNA fingerprint | ||||
| Abstract | Extracting and purifying a representative fraction of bacteria from soil is necessary for the application of many techniques of microbial ecology. Here the influence of different soil types on the quantitative and qualitative recovery of bacteria by soil grinding and Nycodenz density gradient centrifugation was investigated. Three soils presenting contrasted physicochemical characteristics were used for this study. For each soil, the total (AODC: acridine orange direct count) and culturable (cfa: colony-forming units) bacterial densities were measured in three distinct fractions: (i) the primary soil, (ii) the soil pellet (soil remaining after centrifugation), and (iii) the extracted cells. The automated-ribosomal intergenic spacer analysis (A-RISA) was used to characterize the community structure directly from the DNA extracted from each fraction. The physicochemical characteristics of soils were found to influence both the efficiency of bacterial cell recovery and the representativeness of the extracted cells in term of community structures between the different fractions. Surprisingly, the most representative extracted cells were obtained from the soil exhibiting the lowest efficiency of cell recovery. Our results demonstrated that quantitative and qualitative cell recovery using Nycodenz density gradient centrifugation are not necessarily related and could be differentially biased according to soil type. (c) 2006 Elsevier SAS. All rights reserved. | ||||
| Address | Univ Lyon 1, CNRS, UMR 5557, Ctr Microbial Ecol, F-69622 Villeurbanne, France, Email: nazaret@biomserv.univ-lyon1.fr | ||||
| Corporate Author | Thesis | ||||
| Publisher | ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1164-5563 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000238534500001 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 181 | ||
| Permanent link to this record | |||||
| Author | Petitjean, C.; Hénault, C.; Perrin, A.-S.; Pontet, C.; Metay, A.; Bernoux, M.; Jehanno, T.; Viard, A.; Roggy, J.-C. | ||||
| Title | Soil N2O emissions in French Guiana after the conversion of tropical forest to agriculture with the chop-and-mulch method | Type | Journal Article | ||
| Year | 2015 | Publication | Agriculture, Ecosystems and Environment | Abbreviated Journal | Agriculture, Ecosystems and Environment |
| Volume | 208 | Issue | Pages |
64-74 | |
| Keywords | Chop-and-mulch method; Fire-free deforestation; French Guiana; Land use change; Soil N<inf>2</inf>O emissions | ||||
| Abstract | In French Guiana, the population growth will result in an increase in demand for agricultural products and thus, will lead to an increase in the amount of tropical forests converted into cropland or pasture. Impacts of different agricultural systems on greenhouse gas (GHG) fluxes have not been studied in French Guiana. In this context, the fire-free chop-and-mulch method was used to convert a tropical forest site to agriculture. This study focused on soil nitrous oxide (N<inf>2</inf>O) emissions and we compared four land uses: (1) the undisturbed tropical forest, (2) recently converted grassland and recently converted croplands (fertilized soybean/maize rotation) with either (3) disk tillage or (4) no tillage.N<inf>2</inf>O measurements were obtained through the chamber technique and conducted over a 1-year period (measurements began 19 months after the forest was cleared). N<inf>2</inf>O fluxes were related to soil parameters measured at each sampling date: nitrate and ammonium contents, gravimetric water content (GWC) and temperature. Through the entire period, the mean (± standard error) and median N<inf>2</inf>O fluxes were 3.8 ± 0.5 and 2.7 gNha-1day-1, respectively for undisturbed tropical forest and 2.4 ± 0.9 and 0.8gNha-1day-1, respectively for grassland (mowed Brachiaria ruziziensis). For croplands, no significant difference was found for N<inf>2</inf>O emissions between both agricultural practices. The mean (± standard error) and median N<inf>2</inf>O fluxes were 8.5 ± 1.2 and 4.0 gNha-1day-1, respectively for disk tillage plots and 8.5 ± 1.3 and 3.6gNha-1day-1, respectively for no tillage plots. Nitrogen inputs (due to the application of fertilizer or due to the mineralization of crop residues) led to higher N<inf>2</inf>O fluxes, resulting in significantly higher mean N<inf>2</inf>O emissions from croplands compared to the forest, when only considering land use effect on N<inf>2</inf>O fluxes in a statistical model. The soil nitrate content, GWC and temperature had a significant positive effect on N<inf>2</inf>O fluxes. Taking into account these soil parameters in another statistical model, N<inf>2</inf>O emissions from croplands were not higher than the natural N<inf>2</inf>O emissions from tropical forest soils. Our results suggest that, if more forest will have to be converted in the course of the expected population growth in French Guiana, it could have low impact on the soil N<inf>2</inf>O fluxes (similar to natural fluxes from forest) with the improving of farming techniques (for example modification of the splitting of N-fertilizer) in the cropping plots. © 2015 Elsevier B.V. | ||||
| Address | INRA, UMR EcoFoG, Campus agronomiqueKourou, Guyane Française, 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 | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Export Date: 18 May 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 601 | ||
| Permanent link to this record | |||||
| Author | Dejean, A.; Djieto-Lordon, C.; Orivel, J. | ||||
| Title | The plant ant Tetraponera aethiops (Pseudomyrmecinae) protects its host myrmecophyte Barteria fistulosa (Passifloraceae) through aggressiveness and predation | Type | Journal Article | ||
| Year | 2008 | Publication | Biological Journal of the Linnean Society | Abbreviated Journal | Biol. J. Linnean Soc. |
| Volume | 93 | Issue | 1 | Pages |
63-69 |
| Keywords | ants; plant protection; territorial aggressiveness | ||||
| Abstract | Plant ants generally provide their host myrmecophytes (i.e. plants that shelter a limited number of ant species in hollow structures) protection from defoliating insects, but the exact nature of this protection is poorly known. It was with this in mind that we studied the association between Tetraponera aethiops F. Smith (Pseudomyrmecinae) and its specific host myrmecophyte Barteria fistulosa Mast. (Passifloraceae). Workers bore entrances into the horizontal hollow branches (domatia) of their host B. fistulosa, near the base of the petiole of the alternate horizontal leaves. They then ambush intruders from the domatia, close to these entrances. After perceiving the vibrations caused when an insect lands on a leaf, they rush to it and sting and generally spreadeagle the insect (only small caterpillars are mastered by single workers). Among the insects likely to defoliate B. fistulosa, adult leaf beetles and large katydids were taken as prey and cut up; single workers then retrieved some pieces, whereas other workers imbibed the prey's haemolymph. Other insects known to defoliate this plant, if unable to escape, were killed and discarded. Small Acrea zetes L. caterpillars were stung and then discarded by single workers; whereas locusts of different sizes were mastered by groups of workers that stung and spreadeagled them before discarding them (although a part of their haemolymph was imbibed). More workers were involved and more time was necessary to master insects taken as prey than those attacked and discarded. Consequently, the protection T. aethiops workers provide to their host B. fistulosa from defoliating insects results from predation, but more often from a type of aggressiveness wherein insects are killed and then discarded. (c) 2008 The Linnean Society of London. | ||||
| Address | [Dejean, Alain] CNRS Guyane, UPS 2561, F-97300 Cayenne, France, Email: alain.dejean@wanadoo.fr | ||||
| Corporate Author | Thesis | ||||
| Publisher | BLACKWELL PUBLISHING | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0024-4066 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000251738300007 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 213 | ||
| Permanent link to this record | |||||