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Author Valverde-Barrantes, Oscar J. ; Authier, Louise ; Schimann, Heidy ; Baraloto, Christophier doi  openurl
  Title Root anatomy helps to reconcile observed root trait syndromes in tropical tree species Type Journal Article
  Year 2021 Publication American Journal of Botany Abbreviated Journal  
  Volume 108 Issue 5 Pages (up) 744-755  
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  Publisher Botanical Society of America Place of Publication Editor  
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  Call Number EcoFoG @ webmaster @ Serial 1056  
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Author Marcon, E.; Puech, F. openurl 
  Title Measures of the geographic concentration of industries: improving distance-based methods Type Journal Article
  Year 2010 Publication Journal of Economic Geography Abbreviated Journal J. Econ. Geogr.  
  Volume 10 Issue 5 Pages (up) 745-762  
  Keywords Geographic concentration; distance-based methods; K-density function; Ripley's K function; M function; C40; C60; R12; L60  
  Abstract We discuss a property of distance-based measures that has not been addressed with regard to evaluating the geographic concentration of economic activities. The article focuses on the choice between a probability density function of point-pair distances or a cumulative function. We begin by introducing a new cumulative function, M, for evaluating the relative geographic concentration and the co-location of industries in a non-homogeneous spatial framework. Secondly, some rigorous comparisons are made with the leading probability density function of Duranton and Overman (2005), Kd. The merits of the simultaneous use of Kd and M is proved, underlining the complementary nature of the results they provide.  
  Address [Marcon, Eric] AgroParisTech ENGREF, UMR EcoFoG, Kourou 97310, French Guiana, Email: Florence.Puech@univ-lyon2.fr  
  Corporate Author Thesis  
  Publisher OXFORD UNIV PRESS Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1468-2702 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000281183300009 Approved no  
  Call Number EcoFoG @ eric.marcon @ Serial 43  
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Author Goulamoussene, Youven; Bedeau, Caroline; Descroix, Laurent; Deblauwe, Vincent; Linguet, Laurent; Herault, Bruno pdf  doi
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  Title Weak Environmental Controls of Tropical Forest Canopy Height in the Guiana Shield Remote Sensing Type Journal Article
  Year 2016 Publication Remote Sensing Abbreviated Journal Remote Sens  
  Volume 8 Issue 9 Pages (up) 747  
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  Abstract Canopy height is a key variable in tropical forest functioning and for regional carbon inventories. We investigate the spatial structure of the canopy height of a tropical forest, its relationship with environmental physical covariates, and the implication for tropical forest height variation mapping. Making use of high-resolution maps of LiDAR-derived Digital Canopy Model (DCM) and environmental covariates from a Digital Elevation Model (DEM) acquired over 30,000 ha of tropical forest in French Guiana, we first show that forest canopy height is spatially correlated up to 2500 m. Forest canopy height is significantly associated with environmental variables, but the degree of correlation varies strongly with pixel resolution. On the whole, bottomland forests generally have lower canopy heights than hillslope or hilltop forests. However, this global picture is very noisy at local scale likely because of the endogenous gap-phase forest dynamic processes. Forest canopy height has been predictively mapped across a pixel resolution going from 6 m to 384 m mimicking a low resolution case of 3 points·km − 2 . Results of canopy height mapping indicated that the error for spatial model with environment effects decrease from 8.7 m to 0.91 m, depending of the pixel resolution. Results suggest that, outside the calibration plots, the contribution of environment in shaping the global canopy height distribution is quite limited. This prevents accurate canopy height mapping based only on environmental information, and suggests that precise canopy height maps, for local management purposes, can only be obtained with direct LiDAR monitoring.  
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  Call Number EcoFoG @ webmaster @ Serial 724  
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Author Shipley, B.; Timothy Paine, C.E.; Baraloto, C. url  openurl
  Title Quantifying the importance of local niche-based and stochastic processes to tropical tree community assembly Type Journal Article
  Year 2012 Publication Ecology Abbreviated Journal Ecology  
  Volume 93 Issue 4 Pages (up) 760-769  
  Keywords Community Assembly by Trait Selection, CATS; Demographic stochasticity; Dispersal limitation; Environmental filtering; French Guiana; Functional traits; Maxent; Neutral assembly; Tropical forests  
  Abstract Although niche-based and stochastic processes, including dispersal limitation and demographic stochasticity, can each contribute to community assembly, it is difficult to quantify the relative importance of each process in natural vegetation. Here, we extend Shipley's maxent model (Community Assembly by Trait Selection, CATS) for the prediction of relative abundances to incorporate both trait-based filtering and dispersal limitation from the larger landscape and develop a statistical decomposition of the proportions of the total information content of relative abundances in local communities that are attributable to traitbased filtering, dispersal limitation, and demographic stochasticity. We apply the method to tree communities in a mature, species-rich, tropical forest in French Guiana at 1-, 0.25-and 0.04-ha scales. Trait data consisted of species' means of 17 functional traits measured over both the entire meta-community and separately in each of nine 1-ha plots. Trait means calculated separately for each site always gave better predictions. There was clear evidence of trait-based filtering at all spatial scales. Trait-based filtering was the most important process at the 1-ha scale (34%), whereas demographic stochasticity was the most important at smaller scales (37-53%). Dispersal limitation from the meta-community was less important and approximately constant across scales (∼9%), and there was also an unresolved association between site-specific traits and meta-community relative abundances. Our method allows one to quantify the relative importance of local niche-based and meta-community processes and demographic stochasticity during community assembly across spatial and temporal scales. © 2012 by the Ecological Society of America.  
  Address INRA, UMR, Écologie des Forêts de Guyane, 97387 Kourou cedex, France  
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  ISSN 00129658 (Issn) ISBN Medium  
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  Notes Export Date: 6 June 2012; Source: Scopus; Coden: Ecola; doi: 10.1890/11-0944.1; Language of Original Document: English; Correspondence Address: Shipley, B.; Département de Biologie, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada; email: Bill.Shipley@USherbrooke.ca Approved no  
  Call Number EcoFoG @ webmaster @ Serial 401  
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Author Ghislain, B.; Engel, J.; Clair, B.; Donaldson, L.; Baas, P. url  doi
openurl 
  Title Diversity of anatomical structure of tension wood among 242 tropical tree species Type Journal Article
  Year 2019 Publication IAWA Journal Abbreviated Journal  
  Volume 40 Issue 4 Pages (up) 765-784  
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  Abstract Angiosperm trees produce tension wood to actively control their vertical position. Tension wood has often been characterised by the presence of an unlignified inner fibre wall layer called the G-layer. Using this definition, previous reports indicate that only one-third of all tree species have tension wood with G-layers. Here we aim to (i) describe the large diversity of tension wood anatomy in tropical tree species, taking advantage of the recent understanding of tension wood anatomy and (ii) explore any link between this diversity and other ecological traits of the species. We sampled tension wood and normal wood in 432 trees from 242 species in French Guiana. The samples were observed using safranin and astra blue staining combined with optical microscopy. Species were assigned to four anatomical groups depending on the presence/absence of G-layers, and their degree of lignification. The groups were analysed for functional traits including wood density and light preferences. Eighty-six% of the species had G-layers in their tension wood which was lignified in most species, with various patterns of lignification. Only a few species did not have G-layers. We found significantly more species with lignified G-layers among shade-tolerant and shade-demanding species as well as species with a high wood density. Our results bring up-to-date the incidence of species with/without G-layers in the tropical lowland forest where lignified G-layers are the most common anatomy of tension wood. Species without G-layers may share a common mechanism with the bark motor taking over the wood motor. We discuss the functional role of lignin in the G-layer.  
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  Publisher Brill Place of Publication Leiden, The Netherlands Editor  
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  Call Number EcoFoG @ webmaster @ Serial 903  
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Author Lang, G.; Marcon, E. doi  openurl
  Title Testing randomness of spatial point patterns with the Ripley statistic Type Journal Article
  Year 2013 Publication ESAIM: Probability and Statistics Abbreviated Journal ESAIM PS  
  Volume 17 Issue Pages (up) 767-788  
  Keywords Central limit theorem, goodness-of-fit test, Höffding decomposition, null, point pattern, Poisson process, null  
  Abstract Aggregation patterns are often visually detected in sets of location data. These clusters may be the result of interesting dynamics or the effect of pure randomness. We build an asymptotically Gaussian test for the hypothesis of randomness corresponding to a homogeneous Poisson point process. We first compute the exact first and second moment of the Ripley K-statistic under the homogeneous Poisson point process model. Then we prove the asymptotic normality of a vector of such statistics for different scales and compute its covariance matrix. From these results, we derive a test statistic that is chi-square distributed. By a Monte-Carlo study, we check that the test is numerically tractable even for large data sets and also correct when only a hundred of points are observed  
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  Call Number EcoFoG @ webmaster @ Serial 518  
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Author Talaga, S.; Dejean, A.; Carinci, R.; Gaborit, P.; Dusfour, I.; Girod, R. doi  openurl
  Title Updated Checklist of the Mosquitoes (Diptera: Culicidae) of French Guiana Type Journal Article
  Year 2015 Publication Journal of Medical Entomology Abbreviated Journal Journal of Medical Entomology  
  Volume 52 Issue 5 Pages (up) 770-782  
  Keywords culicid; Neotropics; South America; species checklist; vector  
  Abstract The incredible mosquito species diversity in the Neotropics can provoke major confusion during vector control programs when precise identification is needed. This is especially true in French Guiana where studies on mosquito diversity practically ceased 35 yr ago. In order to fill this gap, we propose here an updated and comprehensive checklist of the mosquitoes of French Guiana, reflecting the latest changes in classification and geographical distribution and the recognition of current or erroneous synonymies. This work was undertaken in order to help ongoing and future research on mosquitoes in a broad range of disciplines such as ecology, biogeography, and medical entomology. Thirty-two valid species cited in older lists have been removed, and 24 species have been added including 12 species (comprising two new genera and three new subgenera) reported from French Guiana for the first time. New records are from collections conducted on various phytotelmata in French Guiana and include the following species: Onirion sp. cf Harbach and Peyton (2000), Sabethes (Peytonulus) hadrognathus Harbach, Sabethes (Peytonulus) paradoxus Harbach, Sabethes (Peytonulus) soperi Lane and Cerqueira, Sabethes (Sabethinus) idiogenes Harbach, Sabethes (Sabethes) quasicyaneus Peryassú , Runchomyia (Ctenogoeldia) magna (Theobald), Wyeomyia (Caenomyiella) sp. cf Harbach and Peyton (1990), Wyeomyia (Dendromyia) ypsipola Dyar, Wyeomyia (Hystatomyia) lamellata (Bonne-Wepster and Bonne), Wyeomyia (Miamyia) oblita (Lutz), and Toxorhynchites (Lynchiella) guadeloupensis (Dyar and Knab). At this time, the mosquitoes of French Guiana are represented by 235 species distributed across 22 genera, nine tribes, and two subfamilies.  
  Address UnitÉ d'Entomologie Médicale, Institut Pasteur de la Guyane, 23 Avenue Pasteur, Cayenne Cedex, France  
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  Notes Export Date: 22 October 2015 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 636  
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Author Stahl, C.; Burban, B.; Goret, J.Y.; Bonal, D. openurl 
  Title Seasonal variations in stem CO(2) efflux in the Neotropical rainforest of French Guiana Type Journal Article
  Year 2011 Publication Annals of Forest Science Abbreviated Journal Ann. For. Sci.  
  Volume 68 Issue 4 Pages (up) 771-782  
  Keywords Tropical rainforest; Stem CO(2) efflux; Soil water content; Terra Firme forest; Seasonally flooded forest  
  Abstract Introduction Stem CO(2) efflux (E (s)) is a significant component of total ecosystem respiration, but there is only scant information on seasonal variations in E (s) in tropical rainforests and on the main factors explaining these variations. Methods We conducted a comprehensive 18-month study in French Guiana to try to better understand which environmental factors contribute to seasonal variations in E (s) in two habitats differing in soil water conditions. Results In both habitats, large seasonal variations in E (s) were observed for most trees. The main variations occurred during climatic transition periods and were consistent with seasonal variations in soil and total ecosystem respiration. Discussion Seasonal variations in atmospheric conditions, including air temperature, did not explain seasonal variations in E (s). In contrast, seasonal variations in surface soil water content clearly induced seasonal variations in E (s) in each habitat. Both soil drought and flooded conditions induced a decrease in E (s). Conclusion Our results emphasize the need to integrate the influence of soil water content on E (s) into global models that simulate the response of forest ecosystem fluxes to climate changes.  
  Address [Bonal, D] INRA, UMR INRA UHP Ecol & Ecophysiol Forestiere 1137, F-54280 Champenoux, France, Email: bonal@nancy.inra.fr  
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  Publisher Springer France Place of Publication Editor  
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  Series Volume Series Issue Edition  
  ISSN 1286-4560 ISBN Medium  
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  Notes WOS:000292553400011 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 327  
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Author Lehnebach, R.; Beyer, R.; Letort, V.; Heuret, P. pdf  doi
openurl 
  Title The pipe model theory half a century on: a review Type Journal Article
  Year 2018 Publication Annals of Botany Abbreviated Journal  
  Volume 121 Issue 5 Pages (up) 773-795  
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  Abstract BackgroundMore than a half century ago, Shinozaki et al. (Shinozaki K, Yoda K, Hozumi K, Kira T. 1964a. A quantitative analysis of plant form – the pipe model theory. I. Basic analyses. Japanese Journal of Ecology B: 97–105) proposed an elegant conceptual framework, the pipe model theory (PMT), to interpret the observed linear relationship between the amount of stem tissue and corresponding supported leaves. The PMT brought a satisfactory answer to two vividly debated problems that were unresolved at the moment of its publication: (1) What determines tree form and which rules drive biomass allocation to the foliar versus stem compartments in plants? (2) How can foliar area or mass in an individual plant, in a stand or at even larger scales be estimated? Since its initial formulation, the PMT has been reinterpreted and used in applications, and has undoubtedly become an important milestone in the mathematical interpretation of plant form and functioning.ScopeThis article aims to review the PMT by going back to its initial formulation, stating its explicit and implicit properties and discussing them in the light of current biological knowledge and experimental evidence in order to identify the validity and range of applicability of the theory. We also discuss the use of the theory in tree biomechanics and hydraulics as well as in functional–structural plant modelling.ConclusionsScrutinizing the PMT in the light of modern biological knowledge revealed that most of its properties are not valid as a general rule. The hydraulic framework derived from the PMT has attracted much more attention than its mechanical counterpart and implies that only the conductive portion of a stem cross-section should be proportional to the supported foliage amount rather than the whole of it. The facts that this conductive portion is experimentally difficult to measure and varies with environmental conditions and tree ontogeny might cause the commonly reported non-linear relationships between foliage and stem metrics. Nevertheless, the PMT can still be considered as a portfolio of properties providing a unified framework to integrate and analyse functional–structural relationships.  
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  ISSN 0305-7364 ISBN Medium  
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  Notes 10.1093/aob/mcx194 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 801  
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Author Meyer-Sand, B.R.V.; Blanc-Jolivet, C.; Mader, M.; Paredes-Villanueva, K.; Tysklind, N.; Sebbenn, A.M.; Guichoux, E.; Degen, B. url  doi
openurl 
  Title Development of a set of SNP markers for population genetics studies of Ipe (Handroanthus sp.), a valuable tree genus from Latin America Type Journal Article
  Year 2018 Publication Conservation Genetics Resources Abbreviated Journal Conserv. Gen. Res.  
  Volume 10 Issue 4 Pages (up) 779-781  
  Keywords Handroanthus sp; MassARRAY; Single nucleotide polymorphism  
  Abstract A combination of restriction associated DNA sequencing (RADSeq) and low coverage MiSeq genome sequencing was used for the development of single nucleotide polymorphisms (SNP) and INDEL (insertion/deletions) genetic markers for Ipe (Handroanthus sp.). Of the 402 putative loci identified, 389 SNPs and INDELs (315 nuclear SPNs, six chloroplast INDELs, 15 chloroplast SNPs, 12 mitochondrial INDELs and 41 mitochondrial SNPs) were successfully genotyped at 93 individuals from Brazil, Bolivia and French Guiana using a MassARRAY® iPLEX™ platform. This set of markers will be invaluable for population genetics, phylogeography and DNA fingerprinting studies. © 2017, Springer Science+Business Media B.V., part of Springer Nature.  
  Address Plateforme Génome Transcriptome de Bordeaux, INRA Pierroton, Bâtiment Artiga, 69 route d’Arcachon, Cestas, 33610, France  
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  Publisher Springer Netherlands Place of Publication Editor  
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  ISSN 18777252 (Issn) ISBN Medium  
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  Notes Export Date: 12 November 2018; Correspondence Address: Blanc-Jolivet, C.; Thünen Institute of Forest Genetics, Sieker Landstrasse 2, Germany; email: celine.blanc-jolivet@thuenen.de; References: Blanc-Jolivet, C., Kersten, B., Bourland, N., Guichoux, E., Delcamp, A., Doucet, J.-L., Degen, B., Development of nuclear SNP markers for the timber tracking of the African tree species Sapelli, Entandrophragma cylindricum (2017) Conserv Genet Resour; Blanc-Jolivet, C., Kersten, B., Daïnou, K., Hardy, O., Guichoux, E., Delcamp, A., Degen, B., Development of nuclear SNP markers for genetic tracking of Iroko, Milicia excelsa and Milicia regia (2017) Conserv Genet Resour; Braga, A.C., Reis, A.M.M., Leoi, L.T., Pereira, R.W., Collevatti, R.G., Development and characterization of microsatellite markers for the tropical tree species Tabebuia aurea (Bignoniaceae) (2007) Mol Ecol Notes, 7, pp. 53-56. , COI: 1:CAS:528:DC%2BD2sXis1Sjuro%3D; Dumolin, S., Demesure, B., Pettit, R., Inheritance of chloroplast and mitochondrial genomes in pedunculate oak investigated with an efficient PCR method (1995) Theor Appl Genet, 91, pp. 1253-1256. , COI: 1:CAS:528:DyaK28XhsFKmsLo%3D; Goudet, J., Fstat (Version 2.9.3.2.): a computer program to calculate F-statistics (2002) J Heredity, 86, pp. 485-486; Grose, S.O., Olmstead, R.G., Evolution of a charismatic neotropical clade: molecular phylogeny of Tabebuia s. L crescentieae, and allied genera (Bignoniaceae) (2007) Syst Bot, 32, pp. 650-659; Jardine, D.I., Blanc-Jolivet, C., Dixon, R.R.M., Dormontt, E.E., Dunker, B., Gerlach, J., Development of SNP markers for Ayous (Triplochiton scleroxylon K. Schum) an economically important tree species from tropical West and Central Africa (2016) Conserv Genet Resour, 8 (2), pp. 129-139; Miller, M.R., Dunham, J.P., Amores, A., Cresko, W.A., Johnson, E.A., Rapid and cost-effective polymorphism identification and genotyping using restriction site associated DNA (RAD) markers (2007) Genome Res, 17, pp. 240-248. , COI: 1:CAS:528:DC%2BD2sXhsFKis7w%3D; Pakull, B., Mader, M., Kersten, B., Ekue, M.R.M., Dipelet, U.G.B., Paulini, M., Development of nuclear, chloroplast and mitochondrial SNP markers for Khaya sp (2016) Conserv Genet Resour, 8 (3), pp. 283-297; Schulze, M., Grogan, J., Uhl, C., Lentini, M., Vidal, E., Evaluating Ipê (Tabebuia, Bignoniaceae) logging in amazonia: Sustainable management or catalyst for forest degradation? (2008) Biol Conserv, 141, pp. 2071-2085; Straub, S.C., Parks, M., Weitemier, K., fishbein, M., Cronn, R.C., Liston, A., Navigating the tip of the genomic iceberg: next-generation sequencing for plant systematics (2012) Am J Bot, 99, pp. 349-364. , COI: 1:CAS:528:DC%2BC38XksValtbo%3D Approved no  
  Call Number EcoFoG @ webmaster @ Serial 832  
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