| Home | [21–30] << 31 32 33 34 35 36 37 38 39 40 >> [41–50] |
|
| Records | |||||
|---|---|---|---|---|---|
| Author | Fontaine, S.; Stahl, C.; Klumpp, K.; Picon-Cochard, C.; Grise, M.M.; Dezécache, C.; Ponchant, L.; Freycon, V.; Blanc, L.; Bonal, D.; Burban, B.; Soussana, J.-F.; Blanfort, V.; Alvarez, G. | ||||
| Title | Response to Editor to the comment by Schipper and Smith to our paper entitled 'Continuous soil carbon storage of old permanent pastures in Amazonia' | Type | Journal Article | ||
| Year | 2018 | Publication | Global Change Biology | Abbreviated Journal | Global Change Biology |
| Volume | 24 | Issue | 3 | Pages  |
e732-e733 |
| Keywords | chronosequence study; continuous C accumulation; deep soil C; eddy covariance; grassland | ||||
| Abstract | |||||
| 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 | Export Date: 28 February 2018 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ Fontaine_etal2018 | Serial | 796 | ||
| Permanent link to this record | |||||
| Author | Barassé, V.; Touchard, A.; Téné, N.; Tindo, M.; Kenne, M.; Klopp, C.; Dejean, A.; Bonnafé, E.; Treilhou, M. | ||||
| Title | The peptide venom composition of the fierce stinging ant tetraponera aethiops (formicidae: Pseudomyrmecinae) | Type | Journal Article | ||
| Year | 2019 | Publication | Toxins | Abbreviated Journal | Toxins |
| Volume | 11 | Issue | 12 | Pages |
732 |
| Keywords | Defensive venom; Dimeric peptides; Peptidome; Tetraponera aethiops | ||||
| Abstract | In the mutualisms involving certain pseudomyrmicine ants and different myrmecophytes (i.e., plants sheltering colonies of specialized “plant-ant” species in hollow structures), the ant venom contributes to the host plant biotic defenses by inducing the rapid paralysis of defoliating insects and causing intense pain to browsing mammals. Using integrated transcriptomic and proteomic approaches, we identified the venom peptidome of the plant-ant Tetraponera aethiops (Pseudomyrmecinae). The transcriptomic analysis of its venom glands revealed that 40% of the expressed contigs encoded only seven peptide precursors related to the ant venom peptides from the A-superfamily. Among the 12 peptide masses detected by liquid chromatography-mass spectrometry (LC-MS), nine mature peptide sequences were characterized and confirmed through proteomic analysis. These venom peptides, called pseudomyrmecitoxins (PSDTX), share amino acid sequence identities with myrmeciitoxins known for their dual offensive and defensive functions on both insects and mammals. Furthermore, we demonstrated through reduction/alkylation of the crude venom that four PSDTXs were homo- and heterodimeric. Thus, we provide the first insights into the defensive venom composition of the ant genus Tetraponera indicative of a streamlined peptidome. | ||||
| Address | CNRS, UMR EcoFoG, AgroParisTech, Cirad, INRA, Université des Antilles, Université de Guyane, Kourou, 97310, France | ||||
| Corporate Author | Thesis | ||||
| Publisher | Mdpi Ag | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 20726651 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 902 | ||
| Permanent link to this record | |||||
| Author | Eva, H.D.; Belward, A.S.; De Miranda, E.E.; Di Bella, C.M.; Gond, V.; Huber, O.; Jones, S.; Sgrenzaroli, M.; Fritz, S. | ||||
| Title | A land cover map of South America | Type | Journal Article | ||
| Year | 2004 | Publication | Global Change Biology | Abbreviated Journal | Glob. Change Biol. |
| Volume | 10 | Issue | 5 | Pages |
731-744 |
| Keywords | Amazonia; ecosystems; land cover; mapping; South America; vegetation classes | ||||
| Abstract | A digital land cover map of South America has been produced using remotely sensed satellite data acquired between 1995 and the year 2000. The mapping scale is defined by the 1 km spatial resolution of the map grid-cell. In order to realize the product, different sources of satellite data were used, each source providing either a particular parameter of land cover characteristic required by the legend, or mapping a particular land cover class. The map legend is designed both to fit requirements for regional climate modelling and for studies on land cover change. The legend is also compatible with a wider, global, land cover mapping exercise, which seeks to characterize the world's land surface for the year 2000. As a first step, the humid forest domain has been validated using a sample of high-resolution satellite images. The map demonstrates both the major incursions of agriculture into the remaining forest domains and the extensive areas of agriculture, which now dominate South America's grasslands. | ||||
| Address | Commiss European Communities, Joint Res Ctr, Inst Environm & Sustainabil, TP 440, I-21020 Ispra, Italy, Email: hugh.eva@jrc.it | ||||
| Corporate Author | Thesis | ||||
| Publisher | BLACKWELL PUBLISHING LTD | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 1354-1013 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000221421600015 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 235 | ||
| Permanent link to this record | |||||
| Author | Lauth, J.; Ruiz-González, M.X.; Orivel, J. | ||||
| Title | New findings in insect fungiculture: Have ants developed non-food, agricultural products? | Type | Journal Article | ||
| Year | 2011 | Publication | Communicative & Integrative Biology | Abbreviated Journal | Comm & Integr Biol |
| Volume | 4 | Issue | 1942-0889 | Pages |
728-730 |
| Keywords | |||||
| Abstract | The interaction between Allomerus plant-ants and an ascomycete fungus growing on and strengthening their galleries is not opportunistic. We previously demonstrated that this association is highly specific as only one fungal species represented by a few haplotypes was found associated with the ants. We also discovered that the ants' behavior revealed a major investment in manipulating and enhancing the growth of their associated fungus. We have growing evidence that this specificity is consistent with selection by the ants. Here, we discuss this selection within the framework of insect agriculture, as we believe these ants fulfill all of the prerequisites to be considered as farmers. Allomerus ants promote their symbiont's growth, protect it from potential pathogens and select specific cultivars. Taken together, we think that the interaction between Allomerus ants and their cultivar might represent the first case of insect fungiculture used as a means of obtaining building material. | ||||
| Address | |||||
| Corporate Author | Thesis | ||||
| Publisher | Landes Bioscience Inc. | 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 | 379 | ||
| Permanent link to this record | |||||
| Author | Dutech, C.; Seiter, J.; Petronelli, P.; Joly, H.I.; Jarne, P. | ||||
| Title | Evidence of low gene flow in a neotropical clustered tree species in two rainforest stands of French Guiana | Type | Journal Article | ||
| Year | 2002 | Publication | Molecular Ecology | Abbreviated Journal | Mol. Ecol. |
| Volume | 11 | Issue | 4 | Pages |
725-738 |
| Keywords | Caesalpiniaceae; gene flow; recolonization process; spatial genetic structure; tropical rainforest; Vouacapoua americana | ||||
| Abstract | The spatial genetic structure of the neotropical, clustered tree species Vouacapoua americana (Aublet) was studied in two natural forest stands (Paracou and Nouragues) in French Guiana. Using eight microsatellite loci, V. americana is characterized by a marked genetic structure at small spatial distances (under 30-60 m), in agreement with the limited seed dispersal by rodent species. Gene flow through pollen is also shown to be mainly restricted to less than 100 m. This result suggests that most pollination events (mediated through small insects) are probably limited to within-patches of individuals, which might explain the high genetic differentiation among patches (F-ST = 0.11) separated by less than 2 km. We also assume that stronger genetic structure in Paracou is likely to be due to lower seed dispersal by rodents, large spatial distances separating patches, or a recent recolonization event. | ||||
| Address | CNRS, Ctr Ecol Fonct & Evolut, F-34293 Montpellier 5, France, Email: jarne@cefe.cnrs-mop.fr | ||||
| Corporate Author | Thesis | ||||
| Publisher | BLACKWELL PUBLISHING LTD | 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 | ISI:000175250300008 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 248 | ||
| Permanent link to this record | |||||
| Author | Lefèvre, F.; Boivin, T.; Bontemps, A.; Courbet, F.; Davi, H.; Durand-Gillmann, M.; Fady, B.; Gauzere, J.; Gidoin, C.; Karam, M.-J.; Pichot, C.; Oddou-Muratorio, S.; Pichot, C. | ||||
| Title | Considering evolutionary processes in adaptive forestry | Type | Journal Article | ||
| Year | 2013 | Publication | Annals of Forest Science | Abbreviated Journal | Ann For Sci |
| Volume | 71 | Issue | 7 | Pages |
723-739 |
| Keywords | Adaptation; Climate change; Evolution-oriented forest management; Genetic resources; Silviculture | ||||
| Abstract | Context: Managing forests under climate change requires adaptation. The adaptive capacity of forest tree populations is huge but not limitless. Integrating evolutionary considerations into adaptive forestry practice will enhance the capacity of managed forests to respond to climate-driven changes.
Aims: Focusing on natural regeneration systems, we propose a general framework that can be used in various and complex local situations by forest managers, in combination with their own expertise, to integrate evolutionary considerations into decision making for the emergence of an evolution-oriented forestry. Methods: We develop a simple process-based analytical grid, using few processes and parameters, to analyse the impact of forestry practice on the evolution and evolvability of tree populations. Results: We review qualitative and, whenever possible, quantitative expectations on the intensity of evolutionary drivers in forest trees. Then, we review the effects of actual and potential forestry practice on the evolutionary processes. We illustrate the complexity of interactions in two study cases: the evolutionary consequences for forest trees of biotic interactions and of highly heterogeneous environment. Conclusion: Evolution-oriented forestry may contribute adapting forests to climate change. It requires combining short-term and long-term objectives. We propose future lines of research and experimentation. |
||||
| Address | INRA, UR629 Ecologie des Forêts Méditerranéennes, URFM, Domaine Saint Paul, Site AgroparcAvignon Cedex 9, 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 | Cited By :2; Export Date: 13 January 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 580 | ||
| Permanent link to this record | |||||
| Author | Foucaud, J.; Rey, O.; Robert, S.; Crespin, L.; Orivel, J.; Facon, B.; Loiseau, A.; Jourdan, H.; Kenne, M.; Masse, P.S.M.; Tindo, M.; Vonshak, M.; Estoup, A. | ||||
| Title | Thermotolerance adaptation to human-modified habitats occurs in the native range of the invasive ant Wasmannia auropunctata before long-distance dispersal | Type | Journal Article | ||
| Year | 2013 | Publication | Evolutionary Applications | Abbreviated Journal | Evol. Appl. |
| Volume | 6 | Issue | 4 | Pages |
721-734 |
| Keywords | Adaptation; Heat shock; Invasive species; Natural selection and contemporary evolution; Thermotolerance | ||||
| Abstract | Key evolutionary events associated with invasion success are traditionally thought to occur in the introduced, rather than the native range of species. In the invasive ant Wasmannia auropunctata, however, a shift in reproductive system has been demonstrated within the native range, from the sexual non-dominant populations of natural habitats to the clonal dominant populations of human-modified habitats. Because abiotic conditions of human- modified habitats are hotter and dryer, we performed lab experiments on workers from a set of native and introduced populations, to investigate whether these ecological and genetic transitions were accompanied by a change in thermotolerance and whether such changes occurred before establishment in the introduced range. Thermotolerance levels were higher in native populations from human-modified habitats than in native populations from natural habitats, but were similar in native and introduced populations from human-modified habitats. Differences in thermotolerance could not be accounted for by differences in body size. A scenario based on local adaptation in the native range before introduction in remote areas represents the most parsimonious hypothesis to account for the observed phenotypic pattern. These findings highlight the importance of human land use in explaining major contemporary evolutionary changes. © 2013 The Authors. | ||||
| Address | Department of Biology, Stanford University, Stanford, CA, United States | ||||
| 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 | 17524563 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Export Date: 5 June 2013; Source: Scopus; :doi 10.1111/eva.12058; Language of Original Document: English; Correspondence Address: Foucaud, J.; INRA, UMR1062 CBGP, Montpellier, France; email: foucaud@supagro.inra.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 488 | ||
| Permanent link to this record | |||||
| Author | Paine, C.E.T.; Baraloto, C.; Chave, J.; Herault, B. | ||||
| Title | Functional traits of individual trees reveal ecological constraints on community assembly in tropical rain forests | Type | Journal Article | ||
| Year | 2011 | Publication | Oikos | Abbreviated Journal | Oikos |
| Volume | 120 | Issue | 5 | Pages |
720-727 |
| Keywords | |||||
| Abstract | Niche differentiation and ecological filtering are primary ecological processes that shape community assembly, but their relative importance remains poorly understood. Analyses of the distributions of functional traits can provide insight into the community structure generated by these processes. We predicted the trait distributions expected under the ecological processes of niche differentiation and environmental filtering, then tested these predictions with a dataset of 4672 trees located in nine 1-ha plots of tropical rain forest in French Guiana. Five traits related to leaf function (foliar N concentration, chlorophyll content, toughness, tissue density and specific leaf area), and three traits related to stem function (trunk sapwood density, branch sapwood density, and trunk bark thickness), as well as laminar surface area, were measured on every individual tree. There was far more evidence for environmental filtering than for niche differentiation in these forests. Furthermore, we contrasted results from species-mean and individual-level trait values. Analyses that took within-species trait variation into account were far more sensitive indicators of niche differentiation and ecological filtering. Species-mean analyses, by contrast, may underestimate the effects of ecological processes on community assembly. Environmental filtering appeared somewhat more intense on leaf traits than on stem traits, whereas niche differentiation affected neither strongly. By accounting for within-species trait variation, we were able to more properly consider the ecological interactions among individual trees and between individual trees and their environment. In so doing, our results suggest that the ecological processes of niche differentiation and environmental filtering may be more pervasive than previously believed. | ||||
| Address | [Paine, C. E. Timothy] ENGREF, UMR Ecol Forets Guyane, Kourou 97387, French Guiana, Email: timothy.paine@ieu.uzh.ch | ||||
| Corporate Author | Thesis | ||||
| Publisher | Wiley-Blackwell | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0030-1299 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000289740200008 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 313 | ||
| Permanent link to this record | |||||
| Author | Lecante, A.; Robert, F.; Blandinieres, P.A.; Roos, C. | ||||
| Title | Anti-corrosive properties of S. tinctoria and G. ouregou alkaloid extracts on low carbon steel | Type | Journal Article | ||
| Year | 2011 | Publication | Current Applied Physics | Abbreviated Journal | Curr. Appl. Phys. |
| Volume | 11 | Issue | 3 | Pages |
714-724 |
| Keywords | Low carbon steel; Acidic media; Corrosion inhibitor; Plant extract; EIS | ||||
| Abstract | The effect of alkaloid extracts from two Amazonian trees (Guatteria ouregou and Simira tinctoria) on low carbon steel corrosion was investigated in acidic solutions by using electrochemical techniques. All of these plant extracts inhibit the corrosion of low carbon steel in 0.1 M HCl solutions. As their concentration increases to 250 mg/L, the inhibition efficiencies of S. tinctoria and G. ouregou alkaloid extracts reach approximately 92% in 0.1 M HCl solutions. The adsorption of the inhibitor molecules was in accordance with the Langmuir adsorption isotherm. The results obtained show that these plant extracts could be serve as an effective inhibitor for the corrosion of low carbon steel in hydrochloric acid media. Furthermore, harmane was identified as the main component of S. tinctoria extract and that suggests that it is the active ingredient against corrosion of low carbon steel. (C) 2010 Elsevier B.V. All rights reserved. | ||||
| Address | [Lecante, A.; Robert, F.; Blandinieres, P. A.; Roos, C.] UAG UMR ECOFOG, Lab Mat & Mol Milieu Amazonien, F-97337 Cayenne, French Guiana, France, Email: florent.robert@guyane.univ-ag.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 | 1567-1739 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000288183300088 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 300 | ||
| Permanent link to this record | |||||
| Author | Staudt, K.; Serafimovich, A.; Siebicke, L.; Pyles, R.D.; Falge, E. | ||||
| Title | Vertical structure of evapotranspiration at a forest site (a case study) | Type | Journal Article | ||
| Year | 2011 | Publication | Agricultural and Forest Meteorology | Abbreviated Journal | Agric. For. Meterol. |
| Volume | 151 | Issue | 6 | Pages |
709-729 |
| Keywords | Eddy-covariance; Evapotranspiration; In-canopy profiles; Model; Picea abies L.; Sap flux; coniferous forest; ecosystem modeling; eddy covariance; evapotranspiration; forest canopy; sap flow; Fichtelgebirge; Germany; Picea abies | ||||
| Abstract | The components of ecosystem evapotranspiration of a Norway spruce forest (Picea abies L.) as well as the vertical structure of canopy evapotranspiration were analyzed with a combination of measurements and models for a case study of 5 days in September 2007. Eddy-covariance and sap flux measurements were performed at several heights within the canopy at the FLUXNET site Waldstein-Weidenbrunnen (DE-Bay) in the Fichtelgebirge mountains in Germany. Within and above canopy fluxes were simulated with two stand-scale models, the 1D multilayer model ACASA that includes a third-order turbulence closure and the 3D model STANDFLUX. The soil and understory evapotranspiration captured with the eddy-covariance system in the trunk space constituted 10% of ecosystem evapotranspiration measured with the eddy-covariance system above the canopy. A comparison of transpiration measured with the sap flux technique and inferred from below and above canopy eddy-covariance systems revealed higher estimates from eddy-covariance measurements than for sap flux measurements. The relative influences of possible sources of this mismatch, such as the assumption of negligible contribution of evaporation from intercepted water, and differences between the eddy-covariance flux footprint and the area used for scaling sap flux measurements, were discussed. Ecosystem evapotranspiration as well as canopy transpiration simulated with the two models captured the dynamics of the measurements well, but slightly underestimated eddy-covariance values. Profile measurements and models also gave us the chance to assess in-canopy profiles of canopy evapotranspiration and the contributions of in-canopy layers. For daytime and a coupled or partly coupled canopy, mean simulated profiles of both models agreed well with eddy-covariance measurements, with a similar performance of the ACASA and the STANDFLUX model. Both models underestimated profiles for nighttime and decoupled conditions. During daytime, the upper half of the canopy contributed approximately 80% to canopy evapotranspiration, whereas during nighttime the contribution shifted to lower parts of the canopy. © 2010 Elsevier B.V. | ||||
| Address | Max Planck Institute for Chemistry, Biogeochemistry Department, Joh.-J.-Becherweg 27, 55128 Mainz, Germany | ||||
| 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 | 01681923 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Cited By (since 1996): 3; Export Date: 21 October 2011; Source: Scopus; Coden: Afmee; doi: 10.1016/j.agrformet.2010.10.009; Language of Original Document: English; Correspondence Address: Staudt, K.; University of Bayreuth, Department of Micrometeorology, 95440 Bayreuth, Germany; email: katharina.staudt@uni-bayreuth.de | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 349 | ||
| Permanent link to this record | |||||