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Author Gomes, V.H.F.; IJff, S.D.; Raes, N.; Amaral, I.L.; Salomão, R.P.; de Souza Coelho, L.; de Almeida Matos, F.D.; Castilho, C.V.; de Andrade Lima Filho, D.; López, D.C.; Guevara, J.E.; Magnusson, W.E.; Phillips, O.L.; Wittmann, F.; de Jesus Veiga Carim, M.; Martins, M.P.; Irume, M.V.; Sabatier, D.; Molino, J.-F.; Bánki, O.S.; da Silva Guimarães, J.R.; Pitman, N.C.A.; Piedade, M.T.F.; Mendoza, A.M.; Luize, B.G.; Venticinque, E.M.; de Leão Novo, E.M.M.; Vargas, P.N.; Silva, T.S.F.; Manzatto, A.G.; Terborgh, J.; Reis, N.F.C.; Montero, J.C.; Casula, K.R.; Marimon, B.S.; Marimon, B.-H.; Coronado, E.N.H.; Feldpausch, T.R.; Duque, A.; Zartman, C.E.; Arboleda, N.C.; Killeen, T.J.; Mostacedo, B.; Vasquez, R.; Schöngart, J.; Assis, R.L.; Medeiros, M.B.; Simon, M.F.; Andrade, A.; Laurance, W.F.; Camargo, J.L.; Demarchi, L.O.; Laurance, S.G.W.; de Sousa Farias, E.; Nascimento, H.E.M.; Revilla, J.D.C.; Quaresma, A.; Costa, F.R.C.; Vieira, I.C.G.; Cintra, B.B.L.; Castellanos, H.; Brienen, R.; Stevenson, P.R.; Feitosa, Y.; Duivenvoorden, J.F.; Aymard C., G.A.; Mogollón, H.F.; Targhetta, N.; Comiskey, J.A.; Vicentini, A.; Lopes, A.; Damasco, G.; Dávila, N.; García-Villacorta, R.; Levis, C.; Schietti, J.; Souza, P.; Emilio, T.; Alonso, A.; Neill, D.; Dallmeier, F.; Ferreira, L.V.; Araujo-Murakami, A.; Praia, D.; do Amaral, D.D.; Carvalho, F.A.; de Souza, F.C.; Feeley, K.; Arroyo, L.; Pansonato, M.P.; Gribel, R.; Villa, B.; Licona, J.C.; Fine, P.V.A.; Cerón, C.; Baraloto, C.; Jimenez, E.M.; Stropp, J.; Engel, J.; Silveira, M.; Mora, M.C.P.; Petronelli, P.; Maas, P.; Thomas-Caesar, R.; Henkel, T.W.; Daly, D.; Paredes, M.R.; Baker, T.R.; Fuentes, A.; Peres, C.A.; Chave, J.; Pena, J.L.M.; Dexter, K.G.; Silman, M.R.; Jørgensen, P.M.; Pennington, T.; Di Fiore, A.; Valverde, F.C.; Phillips, J.F.; Rivas-Torres, G.; von Hildebrand, P.; van Andel, T.R.; Ruschel, A.R.; Prieto, A.; Rudas, A.; Hoffman, B.; Vela, C.I.A.; Barbosa, E.M.; Zent, E.L.; Gonzales, G.P.G.; Doza, H.P.D.; de Andrade Miranda, I.P.; Guillaumet, J.-L.; Pinto, L.F.M.; de Matos Bonates, L.C.; Silva, N.; Gómez, R.Z.; Zent, S.; Gonzales, T.; Vos, V.A.; Malhi, Y.; Oliveira, A.A.; Cano, A.; Albuquerque, B.W.; Vriesendorp, C.; Correa, D.F.; Torre, E.V.; van der Heijden, G.; Ramirez-Angulo, H.; Ramos, J.F.; Young, K.R.; Rocha, M.; Nascimento, M.T.; Medina, M.N.U.; Tirado, M.; Wang, O.; Sierra, R.; Torres-Lezama, A.; Mendoza, C.; Ferreira, C.; Baider, C.; Villarroel, D.; Balslev, H.; Mesones, I.; Giraldo, L.E.U.; Casas, L.F.; Reategui, M.A.A.; Linares-Palomino, R.; Zagt, R.; Cárdenas, S.; Farfan-Rios, W.; Sampaio, A.F.; Pauletto, D.; Sandoval, E.H.V.; Arevalo, F.R.; Huamantupa-Chuquimaco, I.; Garcia-Cabrera, K.; Hernandez, L.; Gamarra, L.V.; Alexiades, M.N.; Pansini, S.; Cuenca, W.P.; Milliken, W.; Ricardo, J.; Lopez-Gonzalez, G.; Pos, E.; ter Steege, H. pdf  doi
openurl 
  Title Species Distribution Modelling: Contrasting presence-only models with plot abundance data Type Journal Article
  Year 2018 Publication Scientific Reports Abbreviated Journal Sci. Rep.  
  Volume 8 Issue Pages (up) 1003  
  Keywords  
  Abstract Species distribution models (SDMs) are widely used in ecology and conservation. Presence-only SDMs such as MaxEnt frequently use natural history collections (NHCs) as occurrence data, given their huge numbers and accessibility. NHCs are often spatially biased which may generate inaccuracies in SDMs. Here, we test how the distribution of NHCs and MaxEnt predictions relates to a spatial abundance model, based on a large plot dataset for Amazonian tree species, using inverse distance weighting (IDW). We also propose a new pipeline to deal with inconsistencies in NHCs and to limit the area of occupancy of the species. We found a significant but weak positive relationship between the distribution of NHCs and IDW for 66% of the species. The relationship between SDMs and IDW was also significant but weakly positive for 95% of the species, and sensitivity for both analyses was high. Furthermore, the pipeline removed half of the NHCs records. Presence-only SDM applications should consider this limitation, especially for large biodiversity assessments projects, when they are automatically generated without subsequent checking. Our pipeline provides a conservative estimate of a species’ area of occupancy, within an area slightly larger than its extent of occurrence, compatible to e.g. IUCN red list assessments.  
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  ISSN 2045-2322 ISBN Medium  
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  Call Number EcoFoG @ webmaster @ Gomes2018 Serial 789  
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Author Fox Ramos, A.E.; Alcover, C.; Evanno, L.; Maciuk, A.; Litaudon, M.; Duplais, C.; Bernadat, G.; Gallard, J.-F.; Jullian, J.-C.; Mouray, E.; Grellier, P.; Loiseau, P.M.; Pomel, S.; Poupon, E.; Champy, P.; Beniddir, M.A. doi  openurl
  Title Revisiting Previously Investigated Plants: A Molecular Networking-Based Study of Geissospermum laeve Type Journal Article
  Year 2017 Publication Journal of Natural Products Abbreviated Journal  
  Volume 80 Issue 4 Pages (up) 1007-1014  
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  Abstract Three new monoterpene indole alkaloids (1-3) have been isolated from the bark of Geissospermum laeve, together with the known alkaloids (−)-leuconolam (4), geissolosimine (5), and geissospermine (6). The structures of 1-3 were elucidated by analysis of their HRMS and NMR spectroscopic data. The absolute configuration of geissolaevine (1) was deduced from the comparison of experimental and theoretically calculated ECD spectra. The isolation workflow was guided by a molecular networking-based dereplication strategy using an in-house database of monoterpene indole alkaloids. In addition, five known compounds previously undescribed in the Geissospermum genus were dereplicated from the G. laeve alkaloid extract network and were assigned with various levels of identification confidence. The antiparasitic activities against Plasmodium falciparum and Leishmania donovani as well as the cytotoxic activity against the MRC-5 cell line were determined for compounds 1-5. © 2017 The American Chemical Society and American Society of Pharmacognosy.  
  Address Équipe Chimiothérapie Antiparasitaire BioCIS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, 5 Rue J.-B. Clément, Châtenay-Malabry, France  
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  Notes Export Date: 18 May 2017 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 752  
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Author Fanin, N.; Hattenschwiler, S.; Barantal, S.; Schimann, H.; Fromin, N. openurl 
  Title Does variability in litter quality determine soil microbial respiration in an Amazonian rainforest? Type Journal Article
  Year 2011 Publication Soil Biology & Biochemistry Abbreviated Journal Soil Biol. Biochem.  
  Volume 43 Issue 5 Pages (up) 1014-1022  
  Keywords Carbon forms; French Guiana; Litter quality; Microbial respiration process; Nitrogen; Phosphorus; Stoichiometry  
  Abstract Tree species-rich tropical rainforests are characterized by a highly variable quality of leaf litter input to the soil at small spatial scales. This diverse plant litter is a major source of energy and nutrients for soil microorganisms, particularly in rainforests developed on old and nutrient-impoverished soils. Here we tested the hypothesis that the variability in leaf litter quality produced by a highly diverse tree community determines the spatial variability of the microbial respiration process in the underlying soil. We analyzed a total of 225 litter-soil pairs from an undisturbed Amazonian rainforest in French Guiana using a hierarchical sampling design. The microbial respiration process was assessed using substrate-induced respiration (SIR) and compared to a wide range of quality parameters of the associated litter layer (litter nutrients, carbon forms, stoichiometry, litter mass and pH). The results show that the variability of both litter quality and SIR rates was more important at large than at small scales. SIR rates varied between 1.1 and 4.0 μg h(-1) and were significantly correlated with litter layer quality (up to 50% of the variability explained by the best mixed linear model). Total litter P content was the individual most important factor explaining the observed spatial variation in soil SIR, with higher rates associated to high litter P. SIR rates also correlated positively with total litter N content and with increasing proportions of labile C compounds. However, contrary to our expectation, SIR rates were not related to litter stoichiometry. These data suggest that in the studied Amazonian rainforest, tree canopy composition is an important driver of the microbial respiration process via leaf litter fall, resulting in potentially strong plant-soil feedbacks. (C) 2011 Elsevier Ltd. All rights reserved.  
  Address [Fanin, Nicolas; Haettenschwiler, Stephan; Barantal, Sandra; Fromin, Nathalie] CNRS, CEFE, UMR 5175, F-34293 Montpellier 5, France, Email: nicolas.fanin@cefe.cnrs.fr  
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  Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor  
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  ISSN 0038-0717 ISBN Medium  
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  Notes ISI:000289219500019 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 304  
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Author Santiago, L.S.; De Guzman, M.E.; Baraloto, C.; Vogenberg, J.E.; Brodie, M.; Hérault, B.; Fortunel, C.; Bonal, D. url  doi
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  Title Coordination and trade-offs among hydraulic safety, efficiency and drought avoidance traits in Amazonian rainforest canopy tree species Type Journal Article
  Year 2018 Publication New Phytologist Abbreviated Journal New Phytol.  
  Volume 218 Issue 3 Pages (up) 1015-1024  
  Keywords Amazonian forest; cavitation; drought; hydraulic conductivity; sapwood capacitance; turgor loss point; wood density; xylem; cavitation; climate change; drought; forest canopy; forest ecosystem; hydraulic conductivity; rainforest; species diversity; tree; tropical forest; vulnerability; wood; Amazonia; French Guiana; Paracou  
  Abstract Predicting responses of tropical forests to climate change-type drought is challenging because of high species diversity. Detailed characterization of tropical tree hydraulic physiology is necessary to evaluate community drought vulnerability and improve model parameterization. Here, we measured xylem hydraulic conductivity (hydraulic efficiency), xylem vulnerability curves (hydraulic safety), sapwood pressure–volume curves (drought avoidance) and wood density on emergent branches of 14 common species of Eastern Amazonian canopy trees in Paracou, French Guiana across species with the densest and lightest wood in the plot. Our objectives were to evaluate relationships among hydraulic traits to identify strategies and test the ability of easy-to-measure traits as proxies for hard-to-measure hydraulic traits. Xylem efficiency was related to capacitance, sapwood water content and turgor loss point, and other drought avoidance traits, but not to xylem safety (P50). Wood density was correlated (r = −0.57 to −0.97) with sapwood pressure–volume traits, forming an axis of hydraulic strategy variation. In contrast to drier sites where hydraulic safety plays a greater role, tropical trees in this humid tropical site varied along an axis with low wood density, high xylem efficiency and high capacitance at one end of the spectrum, and high wood density and low turgor loss point at the other.  
  Address INRA, UMR Silva, AgroParisTech, Université de Lorraine, Nancy, 54000, France  
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  Publisher Blackwell Publishing Ltd Place of Publication Editor  
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  ISSN 0028646x (Issn) ISBN Medium  
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  Notes Cited By :6; Export Date: 3 December 2018; Coden: Nepha; Correspondence Address: Santiago, L.S.; Department of Botany & Plant Sciences, University of California, 2150 Batchelor Hall, United States; email: santiago@ucr.edu; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, FEDER 2014–2020; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, Project; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, GY0006894; Funding details: University of California, UC; Funding details: National Institute of Food and Agriculture, NIFA; Funding details: ANR-10-LABX-0025; Funding text 1: We would like to thank Benôıt Burban and Jean-Yves Goret for laboratory support, Jocelyn Cazal and Valentine Alt for skillfully climbing trees for samples, Aurelie Dourdain for database support, and Clement Stahl, John Sperry, Sean Gleason, Todd Dawson, Steve Davis, JoséLuiz Silva, Aleyda Acosta Rangel and three anonymous reviewers for comments and discussions on the data presented. The study has been supported by the TRY initiative on plant traits (http://www.try-db.org). The TRY initiative and database is hosted, developed and maintained by J. Kattge and G. Boenisch (Max Planck Institute for Biogeochemistry, Jena, Germany). TRY is currently supported by Future Earth/ bioDISCOVERY and the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig. We also acknowledge the University of California, Botany and Plant Sciences Department and the USDA National Institute of Food and Agriculture for support. We are grateful to the CIRAD and the GFclim project (FEDER 2014–2020, Project GY0006894) for financial support of the Paracou research station. 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  Call Number EcoFoG @ webmaster @ Serial 842  
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Author Fromin, N.; Porte, B.; Lensi, R.; Hamelin, J.; Domenach, A.-M.; Buatois, B.; Roggy, J.-C. url  openurl
  Title Spatial variability of the functional stability of microbial respiration process: A microcosm study using tropical forest soil Type Journal Article
  Year 2012 Publication Journal of Soils and Sediments Abbreviated Journal J. Soils Sed.  
  Volume 12 Issue 7 Pages (up) 1030-1039  
  Keywords Disturbance; Diversity-stability relationship; Microbial diversity; Substrate-induced respiration  
  Abstract Purpose: Understanding the ability of ecosystem processes to resist to and to recover from disturbances is critical to sustainable land use. However, the spatial variability of the stability has rarely been addressed. Here, we investigated the functional stability of a soil microbial process for 24 soils collected from adjacent locations from a 0. 3 ha tropical rainforest plot in Paracou, French Guiana. Materials and methods: The 24 locations were characterized regarding soil chemical and biological (microbial diversity) parameters and forest structure. The corresponding soils were submitted to an experimental transient heat disturbance during a microcosm experiment. The response of the respiration process was followed using substrate-induced respiration (SIR). Results and discussion: The response of soil SIR to heat disturbance varied widely between samples. The variability of the SIR response increased just after the disturbance, and a global rather homogeneous decrease in SIR rates was observed 15 and 30 days after. The stability of SIR in response to heat disturbance could not be related to either the genetic or the metabolic diversity of the microbial community. The initial level of SIR before the disturbance was the soil variable that best correlated with the impact of the disturbance: the soil locations with the highest initial SIR rates were the most affected 15 and 30 days after the heat disturbance. Conclusions: Such a heterogeneous response suggests that the response of soil processes to a disturbance will be difficult to assess from only local-scale analyses and highlights the need for spatial explicitness in understanding biogeochemical processes. © 2012 Springer-Verlag.  
  Address UMR EcoFoG, BP 709, 97387 Kourou, French Guiana  
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  ISSN 14390108 (Issn) ISBN Medium  
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  Notes Export Date: 30 July 2012; Source: Scopus; doi: 10.1007/s11368-012-0528-7; Language of Original Document: English; Correspondence Address: Fromin, N.; CEFE, CNRS UMR 5175, 1919 Route de Mende, 34293 Montpellier cedex 5, France; email: nathalie.fromin@cefe.cnrs.fr Approved no  
  Call Number EcoFoG @ webmaster @ Serial 415  
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Author Scotti, I.; Montaigne, W.; Cseke, K.; Traissac, S. url  openurl
  Title Life after disturbance (II): the intermediate disturbance hypothesis explains genetic variation in forest gaps dominated by Virola michelii Heckel (Myristicaceae) Type Journal Article
  Year 2015 Publication Annals of Forest Science Abbreviated Journal Annals of Forest Science  
  Volume 72 Issue 8 Pages (up) 1035-1042  
  Keywords Amazon; Bayesian clustering; Demogenetics; Guiana shield; Parentage analysis; Regeneration; Spatial genetic structure; Tropical rainforest  
  Abstract Key message: Genetic diversity appears to be unaffected by disturbance in a stand of the light-demanding Neotropical treeV. michelii. Although spatial genetic structure is modified in post-disturbance cohorts, mixing of seeds from different mother trees in canopy gaps appears to efficiently maintain genetic admixture. Context: The interplay between genetic and demographic processes has major consequences on population viability. Population size affects demographic trends, while genetic diversity insures viability by reducing risks of inbreeding depression and by maintaining adaptive potential. Yet, the consequences of increases in census size (as opposed to effective size) on genetic diversity of forest populations are poorly known. Aims: We have studied the structure of genetic diversity in populations of saplings of the light-responsive tree, Virola michelii (Myristicaceae, the nutmeg family), in two plots having undergone different levels of canopy-gap opening disturbance. This allowed us to test the “intermediate disturbance” hypothesis, which generally applies to species diversity, at the intra-specific scale. Methods: Levels and distribution of genetic diversity were compared between plots and between life stages. Sapling parentage was analysed to infer each adult tree’s contribution to regeneration. Results: Genetic diversity was higher, and spatial genetic structure was stronger in the post-disturbance than in the control seedling population. Parentage analysis suggested that a limited number of parents contributed to most of the regeneration, but that efficient mixing of their progeny may have enhanced the diversity of saplings occupying canopy gaps. Conclusion: A mixture of demo-genetic processes may contribute to maintain genetic diversity in spite of, or possibly due to, ecosystem disturbance in V. michelii. © 2015, INRA and Springer-Verlag France.  
  Address Solicaz, Guyane Technopôle, 16 bis Rue du 14 Juillet, Cayenne, French Guiana  
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  Notes Export Date: 14 December 2015 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 642  
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Author Barantal, S.; Schimann, H.; Fromin, N.; Hattenschwiler, S. url  openurl
  Title Nutrient and Carbon Limitation on Decomposition in an Amazonian Moist Forest Type Journal Article
  Year 2012 Publication Ecosystems Abbreviated Journal Ecosystems  
  Volume 15 Issue 7 Pages (up) 1039-1052  
  Keywords energy limitation; labile carbon; litter quality; nitrogen; phosphorus; priming effect; soil fauna; tropical forest  
  Abstract Tropical forests determine global biogeochemical cycles to a large extent, but control factors for key ecosystem processes such as decomposition remain poorly understood. With a full-factorial C (cellulose), N (urea), and P (phosphate) fertilization experiment, we tested the relative importance of C and nutrient limitation on litter decomposition in a mature lowland moist forest of French Guiana. Despite the previously demonstrated litter C quality control over decomposition and the very low soil P content (0. 1 mg g -1 of soil) at our study site, fertilization with C or P alone did not increase the decomposition of a wide range of litter types (N:P ratios between 20 and 80). Nitrogen fertilization alone also had no effect on decomposition. However, the combined fertilization with N and P resulted in up to 33. 5% more initial litter mass lost, with an increasing effect with wider litter N:P ratios. Soil fauna strongly stimulated litter mass loss and enhanced nutrient fertilization effects. Moreover, nutrient effects on decomposition increased with additional C fertilization in the presence of fauna. Our results suggest that increased N availability is required for a positive P effect on decomposition in the studied P-poor tropical forest. Further stimulation of decomposition by C amendment through priming indicates energy limitation of decomposers that is co-determined by nutrient availability. The demonstrated intricate control of the key resources C, N, and P on decomposition calls for an intensified research effort on multiple resource limitation on key processes in tropical forests and how they change under multiple human impacts. © 2012 Springer Science+Business Media, LLC.  
  Address UMR Ecologie des Forêts de Guyane (ECOFOG), INRA, Kourou, French Guiana  
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  ISSN 14329840 (Issn) ISBN Medium  
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  Notes Export Date: 2 November 2012; Source: Scopus; Coden: Ecosf; doi: 10.1007/s10021-012-9564-9; Language of Original Document: English; Correspondence Address: Schimann, H.; UMR Ecologie des Forêts de Guyane (ECOFOG), INRA, Kourou, French Guiana; email: heidy.schimann@ecofog.gf Approved no  
  Call Number EcoFoG @ webmaster @ Serial 442  
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Author Latouche-Halle, C.; Ramboer, A.; Bandou, E.; Caron, H.; Kremer, A. openurl 
  Title Long-distance pollen flow and tolerance to selfing in a neotropical tree species Type Journal Article
  Year 2004 Publication Molecular Ecology Abbreviated Journal Mol. Ecol.  
  Volume 13 Issue 5 Pages (up) 1055-1064  
  Keywords Dicorynia guianensis; microsatellites; outcrossing rate; pollen flow; reproductive success; tropical tree  
  Abstract Outcrossing rates, pollen dispersal and male mating success were assessed in Dicorynia guianensis Amshoff, a neotropical tree endemic to the Guiana shield. All adult trees within a continuous area of 40 ha (n = 157) were mapped, and were genotyped with six microsatellite loci. In addition, progenies were genotyped from 22 mature trees. At the population level, the species was mostly outcrossing (t(m) = 0.89) but there was marked variation among individuals. One tree exhibited mixed mating, confirming earlier results obtained with isozymes that D. guianensis can tolerate selfing. A Bayesian extension of the fractional paternity method was used for paternity analysis, and was compared with the neighbourhood method used widely for forest trees. Both methods indicated that pollen dispersal was only weakly related to distance between trees within the study area, and that the majority (62%) of pollen came from outside the study stand. Using maximum likelihood, male potential population size was estimated to be 1119, corresponding to a neighbourhood size of 560 hectares. Male mating success was, however, related to the diameter of the stem and to flowering intensity assessed visually. The mating behaviour of D. guianensis is a combination of long-distance pollen flow and occasional selfing. The species can still reproduce when it is extremely rare, either by selfing or by dispersing pollen at long distances. These results, together with the observation that male mating success was correlated with the size of the trees, could be implemented in management procedures aiming at regenerating the species.  
  Address INRA, UMR Ecol Forets Guyane, F-97387 Kourou, France, Email: caron@pierroton.mra.fr  
  Corporate Author Thesis  
  Publisher BLACKWELL PUBLISHING LTD Place of Publication Editor  
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  ISSN 0962-1083 ISBN Medium  
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  Notes ISI:000221016300007 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 237  
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Author Campillo, F.; Rossi, V. openurl 
  Title Convolution Particle Filter for Parameter Estimation in General State-Space Models Type Journal Article
  Year 2009 Publication IEEE Transactions on Aerospace and Electronic Systems Abbreviated Journal IEEE Trans. Aerosp. Electron. Syst.  
  Volume 45 Issue 3 Pages (up) 1063-1072  
  Keywords  
  Abstract The state-space modeling of partially observed dynamical systems generally requires estimates of unknown parameters. The dynamic state vector together with the static parameter vector can be considered as an augmented state vector. Classical filtering methods, such as the extended Kalman filter (EKF) and the bootstrap particle filter (PF), fail to estimate the augmented state vector. For these classical filters to handle the augmented state vector, a dynamic noise term should be artificially added to the parameter components or to the deterministic component of the dynamical system. However, this approach degrades the estimation performance of the filters. We propose a variant of the PF based on convolution kernel approximation techniques. This approach is tested on a simulated case study.  
  Address  
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  Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC Place of Publication Editor  
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  Series Volume Series Issue Edition  
  ISSN 0018-9251 ISBN Medium  
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  Notes ISI:000270225500017 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 194  
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Author Ferry, B.; Bontemps, J.-D.; Blanc, L.; Baraloto, C. url  openurl
  Title Is climate a stronger driver of tree growth than disturbance? A comment on Toledo et al. (2011) Type Journal Article
  Year 2012 Publication Journal of Ecology Abbreviated Journal J. Ecol.  
  Volume 100 Issue 5 Pages (up) 1065-1068  
  Keywords Basal area change; Bolivia; Climate; Disturbance; Logging; Plant-climate interactions; Tree growth; Tropical forest  
  Abstract 1.A recent article published by Toledo (2011b) investigates the effects of spatial variations in climate and soil, and of logging disturbance, on tree and forest growth in Bolivia. It concludes that climate is the strongest driver of tree and forest growth and that climate change may therefore have large consequences for forest productivity and carbon sequestration. However, serious methodological and conceptual discrepancies have been found that challenge these conclusions. 2.Because of an errant coding of 'time after logging' in the regression analysis, and because floristic changes induced by logging could not be incorporated into the analysis, the effect of logging on the average diameter growth is likely to have been strongly underestimated. 3.Basal area growth was improperly calculated as basal area change, and it displayed surprisingly high values, even among unlogged plots. We hypothesize that either these plots may be actually located in secondary forests recovering from past logging, or measurement biases may have hampered the data set. 4.Regardless of climate-growth relationships established across these plots, any inference concerning the potential effects of climate change on forest growth would require a specific quantitative assessment. 5.Synthesis. It is critical to re-assess the relative weight of climate and logging disturbance as driving factors of tree and forest growth, and to find an explanation for the very high basal area increment reported among the unlogged plots. We provide specific recommendations for further analyses of this and similar data sets. © 2012 British Ecological Society.  
  Address INRA, UMR Ecologie des Forêts de Guyane, 97379 Kourou, French Guiana  
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  ISSN 00220477 (Issn) ISBN Medium  
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  Notes Cited By (since 1996): 1; Export Date: 4 September 2012; Source: Scopus; Coden: Jecoa; doi: 10.1111/j.1365-2745.2011.01895.x; Language of Original Document: English; Correspondence Address: Ferry, B.; AgroParisTech, ENGREF-Nancy, UMR 1092, F-54000 Nancy, France; email: bruno.ferry@engref.agroparistech.fr Approved no  
  Call Number EcoFoG @ webmaster @ Serial 426  
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