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Hartke, J.; Sprenger, P.P.; Sahm, J.; Winterberg, H.; Orivel, J.; Baur, H.; Beuerle, T.; Schmitt, T.; Feldmeyer, B.; Menzel, F. |
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Cuticular hydrocarbons as potential mediators of cryptic species divergence in a mutualistic ant association |
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2019 |
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Ecology and Evolution |
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9 |
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16 |
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9160-9176 |
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environmental association; integrative taxonomy; niche differentiation; population structure; sexual selection; speciation |
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Abstract |
Upon advances in sequencing techniques, more and more morphologically identical organisms are identified as cryptic species. Often, mutualistic interactions are proposed as drivers of diversification. Species of the neotropical parabiotic ant association between Crematogaster levior and Camponotus femoratus are known for highly diverse cuticular hydrocarbon (CHC) profiles, which in insects serve as desiccation barrier but also as communication cues. In the present study, we investigated the association of the ants’ CHC profiles with genotypes and morphological traits, and discovered cryptic species pairs in both genera. To assess putative niche differentiation between the cryptic species, we conducted an environmental association study that included various climate variables, canopy cover, and mutualistic plant species. Although mostly sympatric, the two Camponotus species seem to prefer different climate niches. However in the two Crematogaster species, we could not detect any differences in niche preference. The strong differentiation in the CHC profiles may thus suggest a possible role during speciation itself either by inducing assortative mating or by reinforcing sexual selection after the speciation event. We did not detect any further niche differences in the environmental parameters tested. Thus, it remains open how the cryptic species avoid competitive exclusion, with scope for further investigations. © 2019 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. |
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Department of Evolutionary Animal Ecology, University of Bayreuth, Bayreuth, Germany |
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John Wiley and Sons Ltd |
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20457758 (Issn) |
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Export Date: 2 September 2019; Correspondence Address: Hartke, J.; Senckenberg Biodiversity and Climate Research CentreGermany; email: Juliane.Hartke@senckenberg.de; Funding details: Leibniz-Gemeinschaft; Funding details: Agence Nationale de la Recherche, Not Available; Funding details: Deutsche Forschungsgemeinschaft, DFG, ME 3842/5‐1; Funding text 1: We thank Philippe Cerdan and Aurelie Dourdain for research permissions in the Hydreco Lab Petit Saut and the Paracou Research Station, respectively. Similarly, we thank Patrick Châtelet, Philippe Gaucher, and Dorothée Deslignes for permission to sample in the Les Nouragues Reserve. Further on, we thank Heike Stypa for supporting us in preparing the chemical samples. We thank Aidin Niamir for his helpful advice regarding climate data analysis. Financial support for this study was provided by the German Science Foundation (DFG) as a grant to Barbara Feldmeyer (FE 1333/7‐1), Thomas Schmitt (SCHM 2645/7‐1), and Florian Menzel (ME 3842/5‐1) and a grant managed by the French Agence Nationale de la Recherche (CEBA, ref. ANR‐10‐LABX‐25‐01) to Jérôme Orivel. The publication of this article was funded by the Open Access Fund of the Leibniz Association. 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Hofman, M.P.; Hayward, M.W.; Heim, M.; Marchand, P.; Rolandsen, C.M.; Mattisson, J.; Urbano, F.; Heurich, M.; Mysterud, A.; Melzheimer, J.; Morellet, N.; Voigt, U.; Allen, B.L.; Gehr, B.; Rouco, C.; Ullmann, W.; Holand, Ø.; Jørgensen, N.H.; Steinheim, G.; Cagnacci, F.; Kroeschel, M.; Kaczensky, P.; Buuveibaatar, B.; Payne, J.C.; Palmegiani, I.; Jerina, K.; Kjellander, P.; Johansson, Ö.; LaPoint, S.; Bayrakcismith, R.; Linnell, J.D.C.; Zaccaroni, M.; Jorge, M.L.S.; Oshima, J.E.F.; Songhurst, A.; Fischer, C.; Mc Bride, R.T., Jr.; Thompson, J.J.; Streif, S.; Sandfort, R.; Bonenfant, C.; Drouilly, M.; Klapproth, M.; Zinner, D.; Yarnell, R.; Stronza, A.; Wilmott, L.; Meisingset, E.; Thaker, M.; Vanak, A.T.; Nicoloso, S.; Graeber, R.; Said, S.; Boudreau, M.R.; Devlin, A.; Hoogesteijn, R.; May-Junior, J.A.; Nifong, J.C.; Odden, J.; Quigley, H.B.; Tortato, F.; Parker, D.M.; Caso, A.; Perrine, J.; Tellaeche, C.; Zieba, F.; Zwijacz-Kozica, T.; Appel, C.L.; Axsom, I.; Bean, W.T.; Cristescu, B.; Périquet, S.; Teichman, K.J.; Karpanty, S.; Licoppe, A.; Menges, V.; Black, K.; Scheppers, T.L.; Schai-Braun, S.C.; Azevedo, F.C.; Lemos, F.G.; Payne, A.; Swanepoel, L.H.; Weckworth, B.V.; Berger, A.; Bertassoni, A.; McCulloch, G.; Sustr, P.; Athreya, V.; Bockmuhl, D.; Casaer, J.; Ekori, A.; Melovski, D.; Richard-Hansen, C.; Van De Vyver, D.; Reyna-Hurtado, R.; Robardet, E.; Selva, N.; Sergiel, A.; Farhadinia, M.S.; Sunde, P.; Portas, R.; Ambarli, H.; Berzins, R.; Kappeler, P.M.; Mann, G.K.; Pyritz, L.; Bissett, C.; Grant, T.; Steinmetz, R.; Swedell, L.; Welch, R.J.; Armenteras, D.; Bidder, O.R.; González, T.M.; Rosenblatt, A.; Kachel, S.; Balkenhol, N. |
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Title |
Right on track? Performance of satellite telemetry in terrestrial wildlife research |
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Year |
2019 |
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PLoS One |
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14 |
Issue |
5 |
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e0216223 |
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article; nonhuman; telemetry; terrestrial species; wildlife |
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Abstract |
Satellite telemetry is an increasingly utilized technology in wildlife research, and current devices can track individual animal movements at unprecedented spatial and temporal resolutions. However, as we enter the golden age of satellite telemetry, we need an in-depth understanding of the main technological, species-specific and environmental factors that determine the success and failure of satellite tracking devices across species and habitats. Here, we assess the relative influence of such factors on the ability of satellite telemetry units to provide the expected amount and quality of data by analyzing data from over 3,000 devices deployed on 62 terrestrial species in 167 projects worldwide. We evaluate the success rate in obtaining GPS fixes as well as in transferring these fixes to the user and we evaluate failure rates. Average fix success and data transfer rates were high and were generally better predicted by species and unit characteristics, while environmental characteristics influenced the variability of performance. However, 48% of the unit deployments ended prematurely, half of them due to technical failure. Nonetheless, this study shows that the performance of satellite telemetry applications has shown improvements over time, and based on our findings, we provide further recommendations for both users and manufacturers. |
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South African National Parks, Scientific Services, Kimberley, South Africa |
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Public Library of Science |
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19326203 (Issn) |
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EcoFoG @ webmaster @ |
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874 |
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Honorio Coronado, E.N.; Blanc-Jolivet, C.; Mader, M.; García-Dávila, C.R.; Sebbenn, A.M.; Meyer-Sand, B.R.V.; Paredes-Villanueva, K.; Tysklind, N.; Troispoux, V.; Massot, M.; Degen, B. |
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Title |
Development of nuclear and plastid SNP markers for genetic studies of Dipteryx tree species in Amazonia |
Type |
Journal Article |
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Year |
2019 |
Publication |
Conservation Genetics Resources |
Abbreviated Journal |
Conserv. Genet. Res. |
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Volume |
11 |
Issue |
3 |
Pages |
333-336 |
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Abstract |
We developed nuclear and plastid single nucleotide polymorphism (SNP) and insertion/deletion (INDEL) markers for Dipteryx species using a combination of restriction associated DNA sequencing (RADSeq) and low coverage MiSeq genome sequencing. Of the total 315 loci genotyped using a MassARRAY platform, 292 loci were variable and polymorphic among the 73 sampled individuals from French Guiana, Brasil, Peru, and Bolivia. A final set of 56 nuclear SNPs, 26 chloroplast SNPs, 2 chloroplast INDELs, and 32 mitochondrial SNPs identifying significant population structure was developed. This set of loci will be useful for studies on population genetics of Dipteryx species in Amazonia. |
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1877-7260 |
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EcoFoG @ webmaster @ Honorio Coronado2019 |
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906 |
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Author |
Jaouen, G.; Sagne, A.; Buyck, B.; Decock, C.; Louisanna, E.; Manzi, S.; Baraloto, C.; Roy, M.; Schimann, H. |
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Title |
Fungi of French Guiana gathered in a taxonomic, environmental and molecular dataset |
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Journal Article |
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Year |
2019 |
Publication |
Scientific data |
Abbreviated Journal |
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Volume |
6 |
Issue |
206 |
Pages |
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In Amazonia, the knowledge about Fungi remains patchy and biased towards accessible sites. This is particularly the case in French Guiana where the existing collections have been confined to few coastal localities. Here, we aimed at filling the gaps of knowledge in undersampled areas of this region, particularly focusing on the Basidiomycota. From 2011, we comprehensively collected fruiting-bodies with a stratified and reproducible sampling scheme in 126 plots. Sites of sampling reflected the main forest habitats of French Guiana in terms of soil fertility and topography. The dataset of 5219 specimens gathers 245 genera belonging to 75 families, 642 specimens are barcoded. The dataset is not a checklist as only 27% of the specimens are identified at the species level but 96% are identified at the genus level. We found an extraordinary diversity distributed across forest habitats. The dataset is an unprecedented and original collection of Basidiomycota for the region, making specimens available for taxonomists and ecologists. The database is publicly available in the GBIF repository ( https://doi.org/10.15468/ymvlrp ). |
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Department of Biological Science, Florida International University, FL, Miami, 33199, United States |
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Export Date: 28 October 2019 |
Approved |
no |
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Call Number |
EcoFoG @ webmaster @ |
Serial |
891 |
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Author |
Lehnebach, R.; Bossu, J.; Va, S.; Morel, H.; Amusant, N.; Nicolini, E.; Beauchene, J. |
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Title |
Wood density variations of legume trees in French Guiana along the shade tolerance continuum: Heartwood effects on radial patterns and gradients |
Type |
Journal Article |
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Year |
2019 |
Publication |
Forests |
Abbreviated Journal |
Forests |
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Volume |
10 |
Issue |
2 |
Pages |
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Keywords |
French Guiana; Growth-mortality rate; Heartwood; Heartwood extractives; Legumes; Sapwood; Shade tolerance; Tropical tree species; Wood density variations |
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Abstract |
Increasing or decreasing wood density (WD) from pith to bark is commonly observed in tropical tree species. The different types of WD radial variations, long been considered to depict the diversity of growth and mechanical strategies among forest guilds (heliophilic vs. shade-tolerant), were never analyzed in the light of heartwood (HW) formation. Yet, the additional mass of chemical extractives associated to HW formation increases WD and might affect both WD radial gradient (i.e., the slope of the relation between WD and radial distance) and pattern (i.e., linear or nonlinear variation). We studied 16 legumes species from French Guiana representing a wide diversity of growth strategies and positions on the shade-tolerance continuum. Using WD measurements and available HW extractives content values, we computed WD corrected by the extractive content and analyzed the effect of HW on WD radial gradients and patterns. We also related WD variations to demographic variables, such as sapling growth and mortality rates. Regardless of the position along the shade-tolerance continuum, correcting WD gradients reveals only increasing gradients. We determined three types of corrected WD patterns: (1) the upward curvilinear pattern is a specific feature of heliophilic species, whereas (2) the linear and (3) the downward curvilinear patterns are observed in both mid- and late-successional species. In addition, we found that saplings growth and mortality rates are better correlated with the corrected WD at stem center than with the uncorrected value: taking into account the effect of HW extractives on WD radial variations provides unbiased interpretation of biomass accumulation and tree mechanical strategies. Rather than a specific feature of heliophilic species, the increasing WD gradient is a shared strategy regardless of the shade tolerance habit. Finally, our study stresses to consider the occurrence of HW when using WD. |
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Address |
Ecology of Guianan Forests (EcoFoG), AgroParisTech, French Agricultural Research and International Cooperation Organization (CIRAD), French National Centre for Scientific Research (CNRS), French National Institute for Agricultural Research (INRA), Université des Antilles, Université de Guyane, Kourou, French Guiana, 97310, France |
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Mdpi Ag |
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19994907 (Issn) |
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Export Date: 1 February 2019; Correspondence Address: Lehnebach, R.; Laboratory of Botany and Modeling of Plant Architecture and Vegetation (AMAP), French Agricultural Research and International Cooperation Organization (CIRAD)France; email: romain.lehnebach@cirad.fr; Funding details: Agence Nationale de la Recherche, ANR; Funding details: Federación Española de Enfermedades Raras, FEDER; Funding text 1: The authors thank Grégoire Vincent, Jean-François Molino, and Daniel Sabatier for providing demographical data.). The French Agricultural Research Centre for International Development (CIRAD) funded Romain Lehnebach PhD scholarship. This research project was also funded by the European Regional Development Fund (FEDER, no 31703) and benefits from an 'Investissements d'Avenir' grant managed by the French National Research Agency (CEBA, ref. ANR-10-LABX-25-01).; References: Kollmann, F.F.P., Côté, W.A., (1984) Principles of Wood Science and Technology: I Solid Wood, , Springer: Berlin, Germany; Muller-Landau, H.C., Interspecific and inter-site variation in wood specific gravity of tropical trees (2004) Biotropica, 36, pp. 20-32; Van Gelder, H.A., Poorter, L., Sterck, F.J., Wood mechanics, allometry, and life-history variation in a tropical rain forest tree community (2006) New Phyt, 171, pp. 367-378; Chave, J., Coomes, D., Jansen, S., Lewis, S.L., Swenson, N.G., Zanne, A.E., Towards a worldwide wood economics spectrum (2009) Ecol. Lett, 12, pp. 351-366; Wright, S.J., Kitajima, K., Kraft, N.J.B., Reich, P.B., Wright, I.J., Bunker, D.E., Condit, R., Díaz, S., Functional traits and the growth-mortality trade-off in tropical trees (2010) Ecology, 91, pp. 3664-3674; Niklas, K.J., Influence of tissue density-specific mechanical properties on the scaling of plant height (1993) Ann. 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Sci, 16, pp. 625-634; Meinzer, F.C., Lachenbruch, B., Dawson, T.E., (2011) Size-and Age-Related Changes in Tree Structure and Function, , Springer: Dordrecht, The Netherlands; Wiemann, M., Williamson, G., Extreme radial changes in wood specific gravity in some tropical pioneers (1988) Wood Fiber Sci, 20, pp. 344-349; Rueda, R., Williamson, G.B., Radial and vertical wood specific gravity in Ochroma pyramidale (Cav. ex Lam.) Urb (Bombacaceae) (1992) Biotropica, 24, pp. 512-518; Williamson, G.B., Wiemann, M.C., Geaghan, J.P., Radial wood allocation in Schizolobium parahyba (2012) Am. J. 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(1996) IAWA J, 17, pp. 445-461; Woodcock, D., Shier, A., Wood specific gravity and its radial variations: The many ways to make a tree (2002) Trees, 16, pp. 437-443; Hérault, B., Beauchêne, J., Muller, F., Wagner, F., Baraloto, C., Blanc, L., Martin, J.-M., Modeling decay rates of dead wood in a neotropical forest (2010) Oecologia, 164, pp. 243-251; Thibaut, B., Baillères, H., Chanson, B., Fournier-Djimbi, M., Plantations d'arbres à croissance rapide et qualité des produits forestiers sous les tropiques (1997) Bois For. Trop, 252, pp. 49-54; Nock, C.A., Geihofer, D., Grabner, M., Baker, P.J., Bunyavejchewin, S., Hietz, P., Wood density and its radial variation in six canopy tree species differing in shade-tolerance in western Thailand (2009) Ann. Bot, 104, pp. 297-306; Hietz, P., Valencia, R., Joseph Wright, S., Strong radial variation in wood density follows a uniform pattern in two neotropical rain forests (2013) Funct. Ecol, 27, pp. 684-692; Osazuwa-Peters, O.L., Wright, S.J., Zanne, A.E., Radial variation in wood specific gravity of tropical tree species differing in growth-mortality strategies (2014) Am. J. Bot, 101, pp. 803-811; Plourde, B.T., Boukili, V.K., Chazdon, R.L., Radial changes in wood specific gravity of tropical trees: Interand intraspecific variation during secondary succession (2015) Funct. Ecol, 29, pp. 111-120; Hillis, W.E., Secondary Changes in Wood (1977) In The Structure, Biosynthesis, and Degradation of Wood, 11, pp. 247-309. , Loewus, F., Runeckles, V.C., Eds.; Plenum Press: New York, NY, USA; Hillis, W.E., (1987) Heartwood and Tree Exudates, , Springer-Verlag: Berlin, Germany; Yang, K.C., (1990) The Ageing Process of Sapwood Ray Parenchyma Cells in Four Woody Species, , Ph.D. Thesis, University of British Columbia, Vancouver, BC, Canada; Royer, M., Stien, D., Beauchêne, J., Herbette, G., McLean, J.P., Thibaut, A., Thibaut, B., Extractives of the tropical wood wallaba (Eperua falcata Aubl.) as natural anti-swelling agents (2010) Holzforschung, 64, pp. 211-215; Amusant, N., Moretti, C., Richard, B., Prost, E., Nuzillard, J.M., Thévenon, M.F., Chemical compounds from Eperua falcata and Eperua grandiflora heartwood and their biological activities against wood destroying fungus (Coriolus versicolor) (2006) Holz Roh Werkst, 65, pp. 23-28; Lehnebach, R., (2015) Variabilité Ontogénique du Profil Ligneux chez les Légumineuses de Guyane Française, , Ph.D. Thesis, Université de Montpellier, Montpellier, France; Sabatier, D., Prévost, M.F., Quelques données sur la composition floristique, et la diversite des peuplements forestiers de guyane francaise (1990) Bois For. Trop, 219, pp. 31-55; Ter Steege, H., Pitman, N.C.A., Phillips, O.L., Chave, J., Sabatier, D., Duque, A., Molino, J.-F., Castellanos, H., Continental-scale patterns of canopy tree composition and function across Amazonia (2006) Nature, 443, pp. 444-447; Ter Steege, H., Vaessen, R.W., Cárdenas-López, D., Sabatier, D., Antonelli, A., de Oliveira, S.M., Pitman, N.C.A., Salomão, R.P., The discovery of the Amazonian tree flora with an updated checklist of all known tree taxa (2016) Sci. Rep, 6, p. 29549; Woodcock, D.W., Shier, A.D., Does canopy position affect wood specific gravity in temperate forest trees? (2003) Ann. Bot, 91, pp. 529-537; Osazuwa-Peters, O.L., Wright, S.J., Zanne, A.E., Linking wood traits to vital rates in tropical rainforest trees: Insights from comparing sapling and adult wood (2017) Am. J. Bot, 104, pp. 1464-1473; Favrichon, V., Classification des espèces arborées en groupes fonctionnels en vue de la réalisation d'un modèle de dynamique de peuplement en forêt guyanaise (1994) Rev. Ecol. Terre Vie, 49, pp. 379-403; (2016) R: A Language and Environment for Statistical Computing, , R Foundation for Statistical Computing: Vienna, Austria; Taylor, A.M., Gartner, B.L., Morrell, J.J., Heartwood formation and natural durability-A review (2002) Wood Fiber Sci, 34, pp. 587-611; Molino, J.F., Sabatier, D., Tree diversity in tropical rain forests: A validation of the intermediate disturbance hypothesis (2001) Science, 294, pp. 1702-1704; Vincent, G., Molino, J.-F., Marescot, L., Barkaoui, K., Sabatier, D., Freycon, V., Roelens, J.B., The relative importance of dispersal limitation and habitat preference in shaping spatial distribution of saplings in a tropical moist forest: A case study along a combination of hydromorphic and canopy disturbance gradients (2011) Ann. For. Sci, 68, pp. 357-370; Pinheiro, J., Bates, D., (2000) Mixed-Effects Models in S and S-PLUS, , Springer-Verlag: New York, NY, USA; Hurvich, C.M., Tsai, C.-L., Bias of the corrected AIC criterion for underfitted regression and time series models (1991) Biometrika, 78, pp. 499-509; Mazerolle, M.J., AICcmodavg: Model Selection and Multimodel Inference Based on (Q)AIC(c), , https://cran.r-project.org/package=AICcmodavg, R Package Version 2.1-0. 2016 (accessed on 1 December 2018); Harrel, F.E.J., Hmisc: Harrell Miscellaneous, , https://CRAN.R-project.org/package=Hmisc, R Package Version 3.14-3. 2016 (accessed on 1 December 2018); De Mendiburu, F., (2016) Agricolae: Statistical Procedures for Agricultural Research, , https://CRAN.R-project.org/package=agricolae, (accessed on 1 December 2018). R Package Version 1.2-4; Morel, H., Lehnebach, R., Cigna, J., Ruelle, J., Nicolini, E., Beauchêne, J., Basic wood density variations of Parkia velutina Benoist, a long-lived heliophilic Neotropical rainforest tree (2018) Bois For. Trop, 335, pp. 59-69; Bossu, J., (2015) Potentiel de Bagassa guianensis et Cordia alliodora pour la Plantation en Zone Tropicale: Description d'une Stratégie de Croissance Optimale Alliant Vitesse de Croissance et Qualité du Bois, , Ph.D. Thesis, Université de Guyane, Kourou, French Guiana; Oldeman, R.A.A., (1974) L'Architecture de la Forêt Guyanaise, , Office de la Recherche Scientifique et Technique Outre-Mer: Paris, France; Anten, N.P.R., Schieving, F., The role of wood mass density and mechanical constraints in the economy of tree architecture (2010) Am. Nat, 175, p. 11; Larjavaara, M., Muller-Landau, H.C., Rethinking the value of high wood density (2010) Funct. Ecol, 24, pp. 701-705; Lachenbruch, B., McCulloh, K.A., Traits, properties, and performance: How woody plants combine hydraulic and mechanical functions in a cell, tissue, or whole plant (2014) New Phyt, 204, pp. 747-764; Chapotin, S.M., Razanameharizaka, J.H., Holbrook, N.M., A biomechanical perspective on the role of large stem volume and high water content in baobab trees (Adansonia spp.; Bombacaceae) (2006) Am. J. Bot, 93, pp. 1251-1264; Kuo, M.-L., Arganbright, D.G., Cellular distribution of extractives in redwood and incense cedar-Part II Microscopic observation of the location of cell wall and cell cavity extractives (1980) Holzforschung, 34, pp. 41-47; Olson, J.R., Carpenter, S.B., Specific gravity, fibre length, and extractive content of young Paulownia (1985) Wood Fiber Sci, 17, pp. 428-438; Stringer, J.W., Olson, J.R., Radial and vertical variations in stem properties of juvenile black locust (Robinia pseudoacacia) (1987) Wood Fiber Sci, 19, pp. 59-67; Gierlinger, N., Wimmer, R., Radial distribution of heartwood extractives and lignin in mature European larch (2004) Wood Fiber Sci, 36, pp. 387-394; Bossu, J., Beauchêne, J., Estevez, Y., Duplais, C., Clair, B., New insights on wood dimensional stability influenced by secondary metabolites: The case of a fast-growing tropical species Bagassa guianensis Aubl (2016) PLoS ONE, 11; Amusant, N., Beauchene, J., Fournier, M., Janin, G., Thevenon, M.-F., Decay resistance in Dicorynia guianensis Amsh.: Analysis of inter-tree and intra-tree variability and relations with wood colour (2004) Ann. For. Sci, 61, pp. 373-380; Hillis, W.E., Distribution, properties and formation of some wood extractives (1971) Wood Sci. Tech, 5, pp. 272-289; Taylor, A., Freitag, C., Cadot, E., Morrell, J., Potential of near infrared spectroscopy to assess hot-watersoluble extractive content and decay resistance of a tropical hardwood (2008) Holz Roh Werkst, 66, pp. 107-111; Amusant, N., Nigg, M., Thibaut, B., Beauchene, J., Diversity of decay resistance strategies of durable tropical woods species: Bocoa prouacensis Aublet, Vouacapoua americana Aublet, Inga alba (Sw.) Wild (2014) Int. Biodeterior. Biodegrad, 94, pp. 103-108; Falster, D.S., Westoby, M., Tradeoffs between height growth rate, stem persistence and maximum height among plant species in a post-fire succession (2005) Oikos, 111, pp. 57-66; Panshin, A.J., de Zeeuw, C., (1980) Textbook of Wood Technology: Structure, Identification, Properties, and Uses of the Commercial Woods of the United States and Canada, , McGraw-Hill: New York, NY, USA; Hernández, R.E., Influence of accessory substances, wood density and interlocked grain on the compressive properties of hardwoods (2007) Wood Sci. Tech, 41, pp. 249-265; Gherardi Hein, P.R., Tarcísio Lima, J., Relationships between microfibril angle, modulus of elasticity and compressive strength in Eucalyptus wood (2012) Maderas. Cienc. Tecnol, 14, pp. 267-274; Cave, I.D., Walker, J.C.F., Stiffness of wood in fast-grown plantation softwoods: Theinfluence of microfibril angle (1994) For. Prod. J, 44, pp. 43-48; Bossu, J., Lehnebach, R., Corn, S., Regazzi, A., Beauchêne, J., Clair, B., Interlocked grain and density patterns in Bagassa guianensis: Changes with ontogeny and mechanical consequences for trees (2018) Trees, 32, pp. 1643-1655; Hart, J., Johnson, K., Production of decay-resistant sapwood in response to injury (1970) Wood Sci. Tech, 4, pp. 267-272; Boddy, L., Microenvironmental Aspects of Xylem Defenses to Wood Decay Fungi (1992) Defense Mechanisms of Woody Plants Against Fungi, pp. 96-132. , Blanchette, R.A., Biggs, A.R., Eds.; Springer: Berlin, Germany; Roszaini, K., Hale, M.D., Salmiah, U., In-vitro decay resistance of 12 malaysian broadleaf hardwood trees as a function of wood density and extractives compounds (2016) J. Trop. For. Sci, 28, pp. 533-540; Stamm, A.J., Density of wood substance, adsorption by wood, and permeability of wood (1929) J. Phys. Chem, 33, pp. 398-414 |
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EcoFoG @ webmaster @ |
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858 |
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Leponce, M.;Delabie, J.H.C.;Orivel, J.;Jacquemin, J.;Calvo Martin, M.;Dejean, A. |
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Tree-dwelling ant survey (Hymenoptera, Formicidae) in Mitaraka, French Guiana |
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Journal Article |
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2019 |
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Zoosystema |
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40 |
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sp1 |
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163-179 |
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Ants constitute a substantial part of the arthropod biomass in rainforests. Most studies have focused on ground-dwelling ants, which constitute almost half of the diversity of the ant assemblage. We report here the results of the first survey of tree-dwelling ants in French Guiana on a plateau and in a swamp palm forest (Euterpe oleracea Mart.) in the Mitaraka Mountains. We were interested in seeing the effect of topography and geographic distance on species richness and composition and to gather information on the species distribution on tree trunks. The fauna of Mitaraka was compared with one from a site 350 km distant (Petit Saut). In total 105 trees were sampled (30, 30, 45 in the plateau and the swamp forests of Mitaraka, and in Petit Saut plateau forest, respectively). Arboreal ants were attracted using tuna and honey baits spread along a rope reaching an upper branch, except for the palm swamp forest where the baits were only placed at 2 m high. A total of 34, 13 and 22 species were observed in these three respective sites. Six of these species are new records for French Guiana. In Mitaraka Camponotus femoratus (Fabricius, 1804) and Crematogaster leviorLongino, 2003 co-occurred on trees (parabiotic association) and were among the most common species, along with Crematogaster tenuiculaForel, 1904 which was found on other trees (species exclusion). The Mitaraka Mountains appeared more species rich and had a species composition distinct from Petit Saut. Topography also influenced ant species composition. Almost half of the species collected by the baitline method were exclusively foraging in the canopy. |
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EcoFoG @ webmaster @ |
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883 |
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Leroy, C.; Gril, E.; Si Ouali, L.; Coste, S.; Gérard, B.; Maillard, P.; Mercier, H.; Stahl, C. |
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Title |
Water and nutrient uptake capacity of leaf-absorbing trichomes vs. roots in epiphytic tank bromeliads |
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Journal Article |
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2019 |
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Environmental and Experimental Botany |
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Environ. Exp. Bot. |
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163 |
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112-123 |
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15 N labelling; Carbon metabolism; Nutrient uptake; Plant performance; Tank bromeliad; Water status; Aechmea |
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The water and nutrient uptake mechanisms used by vascular epiphytes have been the subject of a few studies. While leaf absorbing trichomes (LATs) are the main organ involved in resource uptake by bromeliads, little attention has been paid to the absorbing role of epiphytic bromeliad roots. This study investigates the water and nutrient uptake capacity of LATs vs. roots in two epiphytic tank bromeliads Aechmea aquilega and Lutheria splendens. The tank and/or the roots of bromeliads were watered, or not watered at all, in different treatments. We show that LATs and roots have different functions in resource uptake in the two species, which we mainly attributed to dissimilarities in carbon acquisition and growth traits (e.g., photosynthesis, relative growth rate, non-structural carbohydrates, malate), to water relation traits (e.g., water and osmotic potentials, relative water content, hydrenchyma thickness) and nutrient uptake (e.g., 15 N-labelling). While the roots of A. aquilega did contribute to water and nutrient uptake, the roots of L. splendens were less important than the role played by the LATs in resource uptake. We also provide evidenced for a synergistic effect of combined watering of tank and root in the Bromelioideae species. These results call for a more complex interpretation of LATs vs. roots in resource uptake in bromeliads. © 2019 Elsevier B.V. |
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INRA, UMR EcoFoG, CNRS, CIRAD, AgroParisTech, Université des Antilles, Université de Guyane, Kourou, 97310, France |
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Elsevier B.V. |
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00988472 (Issn) |
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EcoFoG @ webmaster @ |
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871 |
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Leroy, C.; Maes, A.Q.; Louisanna, E.; Séjalon-Delmas, N. |
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How significant are endophytic fungi in bromeliad seeds and seedlings? Effects on germination, survival and performance of two epiphytic plant species |
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Journal Article |
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2019 |
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Fungal Ecology |
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Fungal Ecol. |
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39 |
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296-306 |
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Aechmea; Bromeliads; Endophytic fungi; Fusarium spp.; Germination; Survival; Trichoderma spp.; Vertical transmission |
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In bromeliads, nothing is known about the associations fungi form with seeds and seedling roots. We investigated whether fungal associations occur in the seeds and seedling roots of two epiphytic Aechmea species, and we explored whether substrate and fungal associations contribute to seed germination, and seedling survival and performance after the first month of growth. We found a total of 21 genera and 77 species of endophytic fungi in the seeds and seedlings for both Aechmea species by Illumina MiSeq sequencing. The fungal associations in seeds were found in the majority of corresponding seedlings, suggesting that fungi are transmitted vertically. Substrate quality modulated the germination and growth of seedlings, and beneficial endophytic fungi were not particularly crucial for germination but contributed positively to survival and growth. Overall, this study provides the first evidence of an endophytic fungal community in both the seeds and seedlings of two epiphytic bromeliads species that subsequently benefit plant growth. © 2019 Elsevier Ltd and British Mycological Society |
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INRA, UMR Ecologie des Forêts de Guyane (AgroParisTech, CIRAD, CNRS, INRA, Université de Guyane, Université des Antilles), Campus Agronomique, BP 316, Kourou cedex, F-97379, France |
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Elsevier Ltd |
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17545048 (Issn) |
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EcoFoG @ webmaster @ |
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867 |
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Longo, M.; Knox, R.G.; Levine, N.M.; Swann, A.L.S.; Medvigy, D.M.; Dietze, M.C.; Kim, Y.; Zhang, K.; Bonal, D.; Burban, B.; Camargo, P.B.; Hayek, M.N.; Saleska, S.R.; Da Silva, R.; Bras, R.L.; Wofsy, S.C.; Moorcroft, P.R. |
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The biophysics, ecology, and biogeochemistry of functionally diverse, vertically and horizontally heterogeneous ecosystems: The Ecosystem Demography model, version 2.2-Part 2: Model evaluation for tropical South America |
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Journal Article |
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2019 |
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Geoscientific Model Development |
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Geoscientific Model Dev. |
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12 |
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10 |
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4347-4374 |
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The Ecosystem Demography model version 2.2 (ED-2.2) is a terrestrial biosphere model that simulates the biophysical, ecological, and biogeochemical dynamics of vertically and horizontally heterogeneous terrestrial ecosystems. In a companion paper (Longo et al., 2019a), we described how the model solves the energy, water, and carbon cycles, and verified the high degree of conservation of these properties in long-term simulations that include long-term (multi-decadal) vegetation dynamics. Here, we present a detailed assessment of the model's ability to represent multiple processes associated with the biophysical and biogeochemical cycles in Amazon forests. We use multiple measurements from eddy covariance towers, forest inventory plots, and regional remote-sensing products to assess the model's ability to represent biophysical, physiological, and ecological processes at multiple timescales, ranging from subdaily to century long. The ED-2.2 model accurately describes the vertical distribution of light, water fluxes, and the storage of water, energy, and carbon in the canopy air space, the regional distribution of biomass in tropical South America, and the variability of biomass as a function of environmental drivers. In addition, ED-2.2 qualitatively captures several emergent properties of the ecosystem found in observations, specifically observed relationships between aboveground biomass, mortality rates, and wood density; however, the slopes of these relationships were not accurately captured. We also identified several limitations, including the model's tendency to overestimate the magnitude and seasonality of heterotrophic respiration and to overestimate growth rates in a nutrient-poor tropical site. The evaluation presented here highlights the potential of incorporating structural and functional heterogeneity within biomes in Earth system models (ESMs) and to realistically represent their impacts on energy, water, and carbon cycles. We also identify several priorities for further model development. |
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Georgia Institute of Technology, Atlanta, GA, United States |
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Copernicus GmbH |
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Cited By :1; Export Date: 27 October 2019; Correspondence Address: Longo, M.; Harvard UniversityUnited States; email: mdplongo@gmail.com |
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EcoFoG @ webmaster @ |
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890 |
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Marcon, E. |
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Entropy as a common measure of biodiversity and the spatial structure of economic activity |
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Journal Article |
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2019 |
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Revue Economique |
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Rev. Econ. |
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70 |
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3 |
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305-326 |
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Diversity; Economic geography; Spatial concentration; Specialization |
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Measures of spatial concentration and specialization in economics are similar to those of biodiversity and ubiquity of species in ecology. Entropy is the fundamental tool that originated in statistical physics and information theory. The definition of number equivalents or effective numbers, that is the number of types in an ideal, simplified distribution, is introduced along with the partitioning of the joint diversity of a bi-dimensional distribution into absolute and relative concentration or specialization and replication. The whole framework is theoretically robust and allows measuring the spatial structure of a discrete space. |
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AgroParisTech, UMR Écologie des forêts de Guyane, CNRS, Cirad, INRA, Université des Antilles, Université de Guyane, Campus Agronomique, BP 701, Kourou, 97310, French Guiana |
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Presses de Sciences Po |
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00352764 (Issn) |
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EcoFoG @ webmaster @ |
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912 |
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