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Author (up) Fortunel, C.; Paine, C.E.T.; Fine, P.V.A.; Mesones, I.; Goret, J.; Burban, B.; Cazal, J.; Baraloto, C.; Comita, L.
Title There's no place like home: seedling mortality contributes to the habitat specialisation of tree species across Amazonia Type Journal Article
Year 2016 Publication Ecology Letters Abbreviated Journal Ecology Letters
Volume 19 Issue 10 Pages 1256-1266
Keywords Amazon basin; forests habitats; habitat association; herbivory; light availability; plant lineages; rainfall temporal variation; seedling performance; soil fertility; tropical trees
Abstract Understanding the mechanisms generating species distributions remains a challenge, especially in hyperdiverse tropical forests. We evaluated the role of rainfall variation, soil gradients and herbivory on seedling mortality, and how variation in seedling performance along these gradients contributes to habitat specialisation. In a 4-year experiment, replicated at the two extremes of the Amazon basin, we reciprocally transplanted 4638 tree seedlings of 41 habitat-specialist species from seven phylogenetic lineages among the three most important forest habitats of lowland Amazonia. Rainfall variation, flooding and soil gradients strongly influenced seedling mortality, whereas herbivory had negligible impact. Seedling mortality varied strongly among habitats, consistent with predictions for habitat specialists in most lineages. This suggests that seedling performance is a primary determinant of the habitat associations of adult trees across Amazonia. It further suggests that tree diversity, currently mostly harboured in terra firme forests, may be strongly impacted by the predicted climate changes in Amazonia. © 2016 John Wiley & Sons Ltd/CNRS
Address Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA, United States
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Notes Export Date: 27 October 2016 Approved no
Call Number EcoFoG @ webmaster @ Serial 698
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Author (up) Fortunel, C.; Ruelle, J.; Beauchene, J.; Fine, P.V.A.; Baraloto, C.
Title Wood specific gravity and anatomy of branches and roots in 113 Amazonian rainforest tree species across environmental gradients Type Journal Article
Year 2014 Publication New Phytologist Abbreviated Journal New Phytol.
Volume 202 Issue 1 Pages 79-94
Keywords Amazonian forests; Branch; Environmental gradients; Neotropical trees; Root; Wood anatomical traits; Wood density; Wood functions
Abstract Wood specific gravity (WSG) is a strong predictor of tree performance across environmental gradients. Yet it remains unclear how anatomical elements linked to different wood functions contribute to variation in WSG in branches and roots across tropical forests. We examined WSG and wood anatomy in white sand, clay terra firme and seasonally flooded forests in French Guiana, spanning broad environmental gradients found throughout Amazonia. We measured 15 traits relating to branches and small woody roots in 113 species representing the 15 most abundant species in each habitat and representative species from seven monophyletic lineages occurring in all habitats. Fiber traits appear to be major determinants of WSG, independent of vessel traits, in branches and roots. Fiber traits and branch and root WSG increased from seasonally flooded species to clay terra firme species and lastly to white sand species. Branch and root wood traits were strongly phylogenetically constrained. Lineages differed in wood design, but exhibited similar variation in wood structure across habitats. We conclude that tropical trees can invest differently in support and transport to respond to environmental conditions. Wind disturbance and drought stress represent significant filters driving tree distribution of Amazonian forests; hence we suggest that biophysical explanations should receive more attention. © 2013 New Phytologist Trust.
Address Department of Biology, University of Florida, Gainesville, FL, 32611, United States
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ISSN 0028646x (Issn) ISBN Medium
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Notes Export Date: 10 March 2014; Source: Scopus; Coden: Nepha; Language of Original Document: English; Correspondence Address: Fortunel, C.; INRA, UMR Ecologie des Forêts de Guyane, BP 709, Kourou Cedex, 97387, France; email: claire.fortunel@ecofog.gf; Funding Details: DEB-0743103, NSF, National Science Foundation; Funding Details: DEB-0743800, NSF, National Science Foundation Approved no
Call Number EcoFoG @ webmaster @ Serial 531
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Author (up) Fortunel, C.; Stahl, C.; Heuret, P.; Nicolini, E.; Baraloto, C.
Title Disentangling the effects of environment and ontogeny on tree functional dimensions for congeneric species in tropical forests Type Journal Article
Year 2020 Publication New Phytologist Abbreviated Journal New Phytol.
Volume 226 Issue 2 Pages 385-395
Keywords chemistry; developmental stage; habitats; Micropholis; morphology; physiology; plant traits; seasons; developmental stage; ecosystem function; forest ecosystem; habitat selection; habitat structure; nutrient availability; ontogeny; physiological response; soil water; taxonomy; tropical forest; Amazonia
Abstract Soil water and nutrient availability are key drivers of tree species distribution and forest ecosystem functioning, with strong species differences in water and nutrient use. Despite growing evidence for intraspecific trait differences, it remains unclear under which circumstances the effects of environmental gradients trump those of ontogeny and taxonomy on important functional dimensions related to resource use, particularly in tropical forests. Here, we explore how physiological, chemical, and morphological traits related to resource use vary between life stages in four species within the genus Micropholis that is widespread in lowland Amazonia. Specifically, we evaluate how environment, developmental stage, and taxonomy contribute to single-trait variation and multidimensional functional strategies. We find that environment, developmental stage, and taxonomy differentially contribute to functional dimensions. Habitats and seasons shape physiological and chemical traits related to water and nutrient use, whereas developmental stage and taxonomic identity impact morphological traits –especially those related to the leaf economics spectrum. Our findings suggest that combining environment, ontogeny, and taxonomy allows for a better understanding of important functional dimensions in tropical trees and highlights the need for integrating tree physiological and chemical traits with classically used morphological traits to improve predictions of tropical forests’ responses to environmental change. © 2019 The Authors New Phytologist © 2019 New Phytologist Trust
Address Department of Biological Sciences, Florida International University, Miami, FL 33133, United States
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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 Approved no
Call Number EcoFoG @ webmaster @ Serial 977
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Author (up) Fortunel, C.; Violle, C.; Rourmet, C.; Buatois, B.; Navas, M.L.; Garnier, E.
Title Allocation strategies and seed traits are hardly affected by nitrogen supply in 18 species differing in successional status Type Journal Article
Year 2009 Publication Perspectives in Plant Ecology Evolution and Systematics Abbreviated Journal Perspect. Plant Ecol. Evol. Syst.
Volume 11 Issue 4 Pages 267-283
Keywords Allometry; Reproductive output; Seed mass; Nitrogen concentration of organs; Succession; Nitrogen supply
Abstract Species performance depends on ecological strategies, revealed by suites of traits, conferring different relative ecological advantages in different environments. Although current knowledge on plant strategies along successional gradients is derived from studies conducted in situ, actually quantifying these strategies requires disentangling the effects of environmental factors from intrinsic differences between species. Here we tested whether allocation strategies and seed traits differ among successional stages and nitrogen levels. To this aim, we assessed biomass and nitrogen allocations and seed traits variations for 18 species, differing in life history and belonging to three stages of a Mediterranean old-field succession. These species were grown as monocultures in an experimental garden under limiting and non-limiting nitrogen supply. Early successional species allocated allometrically more nitrogen and proportionally more biomass to reproduction, and set more seeds than later successional species. Seed mass increased with successional status and was negatively related to seed number. Early successional species thus produced more but less-provisioned seeds, suggesting better colonization abilities. These patterns were not the sole consequence of the replacement of annuals by perennials along the successional gradient, since comparable trends were also observed within each life history. Allocation patterns were generally not altered by nitrogen supply and the higher nitrogen content in vegetative organs of plants grown under high nitrogen supply was not retranslocated from leaves to seeds during seed development. We therefore conclude that differences in plant ecological strategies in species characteristics from contrasting successional stages appear to be intrinsic properties of the studied species, and independent from environmental conditions. (c) 2009 Rubel Foundation, ETH Zurich. Published by Elsevier GmbH. All rights reserved.
Address [Fortunel, Claire; Violle, Cyrille; Rourmet, Catherine; Buatois, Bruno; Garnier, Eric] Ctr Ecol Fonct & Evolut, CNRS, UMR 5175, F-34293 Montpellier 5, France, Email: claire.fortunel@ecofog.gf
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Publisher ELSEVIER GMBH, URBAN & FISCHER VERLAG Place of Publication Editor
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ISSN 1433-8319 ISBN Medium
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Notes ISI:000271799900003 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 93
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Author (up) Foucaud, J.; Estoup, A.; Loiseau, A.; Rey, O.; Orivel, J.
Title Thelytokous parthenogenesis, male clonality and genetic caste determination in the little fire ant: new evidence and insights from the lab Type Journal Article
Year 2010 Publication Heredity Abbreviated Journal Heredity
Volume 105 Issue 2 Pages 205-212
Keywords reproduction system; thelytokous parthenogenesis; male clonality; genetic caste determination; Wasmannia auropunctata
Abstract Previous studies indicate that some populations of the little fire ant, Wasmannia auropunctata, display an unusual reproduction system polymorphism. Although some populations have a classical haplodiploid reproduction system, in other populations queens are produced by thelytokous parthenogenesis, males are produced by a male clonality system and workers are produced sexually. An atypical genetic caste determination system was also suggested. However, these conclusions were indirectly inferred from genetic studies on field population samples. Here we set up experimental laboratory nests that allow the control of the parental relationships between individuals. The queens heading those nests originated from either putatively clonal or sexual populations. We characterized the male, queen and worker offspring they produced at 12 microsatellite loci. Our results unambiguously confirm the unique reproduction system polymorphism mentioned above and that male clonality is strictly associated with thelytokous parthenogenesis. We also observed direct evidence of the rare production of sexual gynes and arrhenotokous males in clonal populations. Finally, we obtained evidence of a genetic basis for caste determination. The evolutionary significance of the reproduction system polymorphism and genetic caste determination as well as future research opportunities are discussed. Heredity (2010) 105, 205-212; doi: 10.1038/hdy.2009.169; published online 25 November 2009
Address [Foucaud, J.; Estoup, A.; Loiseau, A.; Rey, O.] INRA, UMR CBGP, IRD, Cirad,Montpellier SupAgro, Montferrier Sur Lez, France, Email: julien.foucaud@legs.cnrs-gif.fr
Corporate Author Thesis
Publisher NATURE PUBLISHING GROUP Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0018-067X ISBN Medium
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Notes ISI:000280111800007 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 78
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Author (up) Foucaud, J.; Orivel, J.; Fournier, D.; Delabie, J.H.C.; Loiseau, A.; Le Breton, J.; Cerdan, P.; Estoup, A.
Title Reproductive system, social organization, human disturbance and ecological dominance in native populations of the little fire ant, Wasmannia auropunctata Type Journal Article
Year 2009 Publication Molecular Ecology Abbreviated Journal Mol. Ecol.
Volume 18 Issue 24 Pages 5059-5073
Keywords biological invasion; clonality; human disturbance; parthenogenesis; social organization; Wasmannia auropunctata
Abstract The invasive ant species Wasmannia auropunctata displays both ecologically dominant and non-dominant populations within its native range. Three factors could theoretically explain the ecological dominance of some native populations of W. auropunctata: (i) its clonal reproductive system, through demographic and/or adaptive advantages; (ii) its unicolonial social organization, through lower intraspecific and efficient interspecific competition; (iii) the human disturbance of its native range, through the modification of biotic and abiotic environmental conditions. We used microsatellite markers and behavioural tests to uncover the reproductive modes and social organization of dominant and non-dominant native populations in natural and human-modified habitats. Microsatellite and mtDNA data indicated that dominant and non-dominant native populations (supercolonies as determined by aggression tests) of W. auropunctata did not belong to different evolutionary units. We found that the reproductive system and the social organization are neither necessary nor sufficient to explain W. auropunctata ecological dominance. Dominance rather seems to be set off by unknown ecological factors altered by human activities, as all dominant populations were recorded in human-modified habitats. The clonal reproductive system found in some populations of W. auropunctata may however indirectly contribute to its ecological dominance by allowing the species to expand its environmental niche, through the fixation over time of specific combinations of divergent male and female genotypes. Unicoloniality may rather promote the range expansion of already dominant populations than actually trigger ecological dominance. The W. auropunctata model illustrates the strong impact of human disturbance on species' ecological features and the adaptive potential of clonal reproductive systems.
Address [Foucaud, Julien; Fournier, Denis; Loiseau, Anne; Estoup, Arnaud] Montpellier SupAgro, Cirad, IRD, INRA,UMR CBGP, F-34988 Montferrier Sur Lez, France, Email: julien.foucaud@legs.cnrs-gif.fr
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Publisher WILEY-BLACKWELL PUBLISHING, INC Place of Publication Editor
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ISSN 0962-1083 ISBN Medium
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Notes ISI:000272452700009 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 191
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Author (up) Foucaud, J.; Orivel, J.; Loiseau, A.; Delabie, J.H.C.; Jourdan, H.; Konghouleux, D.; Vonshak, M.; Tindo, M.; Mercier, J.L.; Fresneau, D.; Mikissa, J.B.; McGlynn, T.; Mikheyev, A.S.; Oettler, J.; Estoup, A.
Title Worldwide invasion by the little fire ant: routes of introduction and eco-evolutionary pathways Type Journal Article
Year 2010 Publication Evolutionary Applications Abbreviated Journal Evol. Appl.
Volume 3 Issue 4 Pages 363-374
Keywords biological invasion; introduction routes; parthenogenesis; reproduction system; Wasmannia auropunctata
Abstract Biological invasions are generally thought to occur after human aided migration to a new range. However, human activities prior to migration may also play a role. We studied here the evolutionary genetics of introduced populations of the invasive ant Wasmannia auropunctata at a worldwide scale. Using microsatellite markers, we reconstructed the main routes of introduction of the species. We found three main routes of introduction, each of them strongly associated to human history and trading routes. We also demonstrate the overwhelming occurrence of male and female clonality in introduced populations of W. auropunctata, and suggest that this particular reproduction system is under selection in human-modified habitats. Together with previous researches focused on native populations, our results suggest that invasive clonal populations may have evolved within human modified habitats in the native range, and spread further from there. The evolutionarily most parsimonious scenario for the emergence of invasive populations of the little fire ant might thus be a two-step process. The W. auropunctata case illustrates the central role of humans in biological change, not only due to changes in migration patterns, but also in selective pressures over species.
Address [Foucaud, Julien; Loiseau, Anne; Jourdan, Herve; Konghouleux, Djoel; Estoup, Arnaud] Montpellier SupAgro, INRA, UMR CBGP, IRD,Cirad, F-34988 Montferrier Sur Lez, France, Email: julien.foucaud@legs.cnrs-gif.fr
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Publisher WILEY-BLACKWELL PUBLISHING, INC Place of Publication Editor
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ISSN 1752-4571 ISBN Medium
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Notes ISI:000278913600004 Approved no
Call Number EcoFoG @ eric.marcon @ Serial 79
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Author (up) Foucaud, J.; Rey, O.; Robert, S.; Crespin, L.; Orivel, J.; Facon, B.; Loiseau, A.; Jourdan, H.; Kenne, M.; Masse, P.S.M.; Tindo, M.; Vonshak, M.; Estoup, A.
Title Thermotolerance adaptation to human-modified habitats occurs in the native range of the invasive ant Wasmannia auropunctata before long-distance dispersal Type Journal Article
Year 2013 Publication Evolutionary Applications Abbreviated Journal Evol. Appl.
Volume 6 Issue 4 Pages 721-734
Keywords Adaptation; Heat shock; Invasive species; Natural selection and contemporary evolution; Thermotolerance
Abstract Key evolutionary events associated with invasion success are traditionally thought to occur in the introduced, rather than the native range of species. In the invasive ant Wasmannia auropunctata, however, a shift in reproductive system has been demonstrated within the native range, from the sexual non-dominant populations of natural habitats to the clonal dominant populations of human-modified habitats. Because abiotic conditions of human- modified habitats are hotter and dryer, we performed lab experiments on workers from a set of native and introduced populations, to investigate whether these ecological and genetic transitions were accompanied by a change in thermotolerance and whether such changes occurred before establishment in the introduced range. Thermotolerance levels were higher in native populations from human-modified habitats than in native populations from natural habitats, but were similar in native and introduced populations from human-modified habitats. Differences in thermotolerance could not be accounted for by differences in body size. A scenario based on local adaptation in the native range before introduction in remote areas represents the most parsimonious hypothesis to account for the observed phenotypic pattern. These findings highlight the importance of human land use in explaining major contemporary evolutionary changes. © 2013 The Authors.
Address Department of Biology, Stanford University, Stanford, CA, United States
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ISSN 17524563 (Issn) ISBN Medium
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Notes Export Date: 5 June 2013; Source: Scopus; :doi 10.1111/eva.12058; Language of Original Document: English; Correspondence Address: Foucaud, J.; INRA, UMR1062 CBGP, Montpellier, France; email: foucaud@supagro.inra.fr Approved no
Call Number EcoFoG @ webmaster @ Serial 488
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Author (up) Fouquet, A.; Dubut, V.; Hataway, R.; Scotti-Saintagne, C.; Scotti, I.; Noonan, B.
Title Isolation and characterisation of 19 microsatellite loci from the Amazonian frog Adenomera andreae (Amphibia: Anura: Leptodactylidae) Type Journal Article
Year 2009 Publication Conservation Genetics Resources Abbreviated Journal Conserv. Genet. Res.
Volume 1 Issue 1 Pages 217-220
Keywords Biomedicine
Abstract Nineteen novel microsatellite loci were isolated from Adenomera andreae, a widespread Amazonian frog considered to be a species complex. Three multiplex kits were optimized. Genetic diversity was assessed in 66 individuals sampled in three populations along the West of the Approuague River catchment (French Guiana). We also tested the multiplex kits in four other Adenomera and nine Leptodactylus species with 43.4 and 17.5% success respectively.
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Publisher Springer Netherlands Place of Publication Editor
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ISSN 1877-7252 ISBN Medium
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Call Number EcoFoG @ eric.marcon @ Serial 185
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Author (up) Fouquet, A.; Ledoux, J.-B.; Dubut, V.; Noonan, B.P.; Scotti, I.
Title The interplay of dispersal limitation, rivers, and historical events shapes the genetic structure of an Amazonian frog Type Journal Article
Year 2012 Publication Biological Journal of the Linnean Society Abbreviated Journal Biol. J. Linn. Soc.
Volume 106 Issue 2 Pages 356-373
Keywords Amazonia; Amphibian; Gene flow; Microsatellites; Mitochondrial DNA; Spatial genetic structure
Abstract Disentangling the impact of landscape features such as rivers and historical events on dispersal is a challenging but necessary task to gain a comprehensive picture of the evolution of diverse biota such as that found in Amazonia. Adenomera andreae, a small, territorial, terrestrial frog species of the Amazonian forest represents a good model for such studies. We combined cytochromeb sequences with 12 microsatellites to investigate the genetic structure at two contrasted spatial scales in French Guiana: along a ∼6-km transect, to evaluate dispersal ability, and between paired bank populations along a ∼65-km stretch of the Approuague river, to test the effect of rivers as barriers to dispersal. We observed significant spatial genetic structure between individuals at a remarkably small geographical scale, and conclude that the species has a restricted dispersal ability that is probably tied to its life-history traits. Mitochondrial and microsatellite data also indicate a high level of differentiation among populations on opposite banks of the river, and, in some cases, among populations on the same riverbank. These results suggest that the observed population structure in A.andreae is the result of restricted dispersal abilities combined with the action of rivers and Quaternary population isolation. Given that Amazonia hosts a great portion of anurans, as well as other small vertebrates, that display life-history traits comparable with A.andreae, we argue that our analyses provide new insights into the complex interactions among evolutionary processes shaping Amazonian biodiversity. © 2012 The Linnean Society of London.
Address INRA, UMR ECOFOG, Campus agronomique, Avenue de France, BP 709, 97387 Kourou, French Guiana, France
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ISSN 00244066 (Issn) ISBN Medium
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Notes Export Date: 2 May 2012; Source: Scopus; Coden: Bjlsb; doi: 10.1111/j.1095-8312.2012.01871.x; Language of Original Document: English; Correspondence Address: Fouquet, A.; Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461, CEP 05422-970, São Paulo, Brazil; email: fouquet.antoine@gmail.com Approved no
Call Number EcoFoG @ webmaster @ Serial 397
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