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Author Lambs, L.; Bompy, F.; Imbert, D.; Corenblit, D.; Dulormne, M.
Title Seawater and freshwater circulations through coastal forested wetlands on a Caribbean Island Type Journal Article
Year 2015 Publication Water Abbreviated Journal Water
Volume 7 Issue 8 Pages 4108-4128
Keywords 18O/2H stable isotope; Hydrology; Mangrove; Salinity; Swamp forest; Water level
Abstract Structure and composition of coastal forested wetlands are mainly controlled by local topography and soil salinity. Hydrology plays a major role in relation with tides, seaward, and freshwater inputs, landward. We report here the results of a two-year study undertaken in a coastal plain of the Guadeloupe archipelago (FWI). As elsewhere in the Caribbean islands, the study area is characterized by a micro-tidal regime and a highly seasonal climate. This work aimed at understanding groundwater dynamics and origin (seawater/freshwater) both at ecosystems and stand levels. These hydrological processes were assessed through 18O/16O and 2H/1H isotopic analyses, and from monthly monitoring of water level and soil salinity at five study sites located in mangrove (3) and swamp forest (2). Our results highlight the importance of freshwater budget imbalance during low rainfall periods. Sustained and/or delayed dry seasons cause soil salinity to rise at the mangrove/swamp forest ecotone. As current models on climate change project decreasing rainfall amounts over the inner Caribbean region, one may expect for this area an inland progression of the mangrove forest to the expense of the nearby swamp forest. © 2015 by the authors.
Address Geolab, UMR 6042, CNRS-Université Blaise Pascal, 4 rue Ledru, Clermont-Ferrand Cedex, France
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Notes (down) Export Date: 8 September 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 621
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Author Colin, F.; Sanjines, A.; Fortin, M.; Bontemps, J.-D.; Nicolini, E.
Title Fagus sylvatica trunk epicormics in relation to primary and secondary growth Type Journal Article
Year 2012 Publication Annals of Botany Abbreviated Journal Ann. Bot.
Volume 110 Issue 5 Pages 995-1005
Keywords epicormics; European beech; Fagus sylvatica; mixed ZIP models; ontogeny; radial growth; sprouting
Abstract Background and AimsEuropean beech epicormics have received far less attention than epicormics of other species, especially sessile oak. However, previous work on beech has demonstrated that there is a negative effect of radial growth on trunk sprouting, while more recent investigations on sessile oak proved a strong positive influence of the presence of epicormics. The aims of this study were, first, to make a general quantification of the epicormics present along beech stems and, secondly, to test the effects of both radial growth and epicormic frequency on sprouting. MethodsIn order to test the effect of radial growth, ten forked individuals were sampled, with a dominant and a dominated fork of almost equal length for every individual. To test the effects of primary growth and epicormic frequency, on the last 17 annual shoots of each fork arm, the number of axillary buds, shoot length, ring width profiles, epicormic shoots and other epicormics were carefully recorded. Key ResultsThe distribution of annual shoot length, radial growth profiles and parallel frequencies of all epicormics are presented. The latter frequencies were parallel to the annual shoot lengths, nearly equivalent for both arms of each tree, and radial growth profiles included very narrow rings in the lowest annual shoots and even missing rings in the dominated arms alone. The location of the latent buds and the epicormics was mainly at branch base, while epicormic shoots, bud clusters and spheroblasts were present mainly in the lowest annual shoots investigated. Using a zero-inflated mixed model, sprouting was shown to depend positively on epicormic frequency and negatively on radial growth. ConclusionsSupport for a trade-off between cambial activity and sprouting is put forward. Sprouting mainly depends on the frequency of epicormics. Between-and within-tree variability of the epicormic composition in a given species may thus have fundamental and applied implications. © 2012 The Author.
Address Equipe Architecture et Développement des Plantes, CIRAD, Campus Agronomique de Silvolab, BP 701, 97387 Kourou cedex, Guyane, France
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Notes (down) Export Date: 8 October 2012; Source: Scopus; Coden: Anboa; doi: 10.1093/aob/mcs178; Language of Original Document: English; Correspondence Address: Colin, F.; INRA, Centre de Nancy, UMR 1092 INRA-AgroParisTech LERFoB, 54280 Champenoux, France; email: colin@nancy.inra.fr Approved no
Call Number EcoFoG @ webmaster @ Serial 439
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Author Odonne, G.; Berger, F.; Stien, D.; Grenand, P.; Bourdy, G.
Title Treatment of leishmaniasis in the Oyapock basin (French Guiana): A K.A.P. survey and analysis of the evolution of phytotherapy knowledge amongst Wayãpi Indians Type Journal Article
Year 2011 Publication Journal of Ethnopharmacology Abbreviated Journal J. Ethnopharmacol.
Volume 137 Issue 3 Pages 1228-1239
Keywords Camopi River; French Guiana; Intercultural exchanges; K.A.P.; Knowledge attitude and practices; Knowledge evolution; Leishmaniasis; Oyapock River; Quantitative ethnopharmacology; Teko; Traditional remedies; Wayãpi
Abstract Ethnopharmacological relevance: Cutaneous leishmaniasis is a neglected disease with a high incidence in French Guiana, mainly in the middle and upper Oyapock basin, where Amerindian and some Brazilian people live. The main goals of this work were (i) to assess the knowledge about leishmaniasis in the different populations of the middle and upper Oyapock basin, (ii) to study the therapeutic strategies adopted by people affected by leishmaniasis and (iii) to document the use of phytotherapeutic remedies for leishmaniasis. Knowledge, attitudes and practices (K.A.P.) related to this disease and its treatments have been studied according to cultural group and geographical settlement. Within the Wayãpi group, the evolution of the knowledge of phytoremedies over the last 20 years has been characterised by literature-based comparisons. Materials and methods: A total of 144 questionnaires were administered in all the villages of the upper Oyapock and Camopi basins. Correspondence analyses were used for multivariate analysis. Plant species were identified at the Cayenne Herbarium (CAY). Results: The biomedical concept of leishmaniasis correlates well with the Teko and Wayãpi concepts of kalasapa and kalasapau. Although the vector of this disease was not correctly identified, the most commonly cited aetiology (74.5%) was vector-borne, and related epidemiological schemes correlate well with the one encountered in French Guiana. Theoretically and practically, health centres were the most commonly used resource for diagnostic in instances of leishmaniasis infection (65.9%), independently of the patient's cultural group, along with the use of pharmaceutical drugs (85.3%). Pharmaceuticals were commonly utilised despite the frequent (51.5%) use of phytotherapeutic remedies, alone or in combination with drugs. The most cited medicinal plant species for the treatment of leishmaniasis included Eleutherine bulbosa (Mill.) Urb. (Iridaceae, cited 14 times), Euterpe oleracea Mart. (Arecaceae, 9), Cecropia obtusa Trecul (Cecropiaceae, 8), Jatropha curcas L. (Euphorbiaceae, 7), Ceiba pentandra (L.) Gaertn. (Bombacaceae, 6) and Carica papaya L. (Caricaceae, 6). Multiple correspondence analyses demonstrated that the species used in leishmaniasis remedies are more prone to vary by the user's place of residence than by their cultural origin, which indicates that exchange of knowledge about leishmaniasis remedies has occurred across different cultural groups. Literature-based comparisons between the remedies for leishmaniasis used by the Wayãpi during the 1980s showed a striking evolution, both in terms of diversity of species and number of plants used. The large number of species shared with other Guianese groups argues for intercultural exchange and may explain the majority (57.1%) of the newly used species highlighted in our study. Conclusions: Leishmaniasis is a well-known disease in the studied area. Phytotherapeutic treatments are still in use, although they are not the main source of remedies, and should undergo pharmacological studies to evaluate their potential therapeutic value. © 2011 Elsevier Ireland Ltd. All rights reserved.
Address IRD, UMR152, F-31062 Toulouse Cedex 9, France
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Notes (down) Export Date: 8 November 2011; Source: Scopus; Article in Press; Coden: Joetd; doi: 10.1016/j.jep.2011.07.044; Language of Original Document: English; Correspondence Address: Odonne, G.; CNRS-UMR Ecofog, Université des Antilles et de la Guyane, 97337 Cayenne Cedex, Franceemail: guillaume.odonne@gmail.com Approved no
Call Number EcoFoG @ webmaster @ Serial 368
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Author Devault, D.A.; Lévi, Y.; Karolak, S.
Title Applying sewage epidemiology approach to estimate illicit drug consumption in a tropical context: Bias related to sewage temperature and pH Type Journal Article
Year 2017 Publication Science of the Total Environment Abbreviated Journal Science of the Total Environment
Volume 584-585 Issue Pages 252-258
Keywords Cannabis; Degradation; H2s; Half-life; Illicit drugs; Wastewater
Abstract Illicit drug consumption can be estimated from drug target residue (DTR) in wastewater, with the reliability of results being partly linked to DTR stability in the sewage network. However, wastewater temperature and pH drive the stability of molecules and, in this context, tropical conditions must be studied to specify the impact of residence time in the sewage network on DTR degradation. Warmth enhances biotic and abiotic processes such as degradation, leading to a decrease in oxygen content, and consequently, early diagenesis conditions in wastewater. In this study, we conduct laboratory studies under acidic pH and high temperature (30 °C) conditions to determine the degradation half-lives of cocaine (COC), tetrahydrocannabinol, and heroine targets, allowing COC/benzoylecgonine (BZE) ratio variations to be predicted in sewage networks. A rapid COC degradation is observed, as already reported in the literature but without a short-term significant difference between 20 °C and 30 °C. Acidic pH seems to prevent degradation. Thus, theoretically, the use of COC as DTR is only reliable in acidic conditions, with the decrease in COC concentration being 6% at 8 h, but over 40% in other conditions. By contrast, the use of BZE as DTR to estimate COC consumption, which is performed in practice, can be undertaken with the same back-calculation equation as used in temperate countries. However, 11-nor-delta-9-carboxytetrahydrocannabinol stability is more influenced by high temperature: concentration levels after 24 h are 20% lower at 30 °C than at 20 °C, corresponding to a 20% and 40% decrease, respectively. Based on a mean residence time of 8 h, underestimated cannabis consumption is close to 15% in tropical contexts, which is double that of temperate areas. © 2017 Elsevier B.V.
Address Public Health and Environnement Laboratory, UMR 8079 Ecologie Systématique Evolution, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Orsay, France
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Notes (down) Export Date: 8 March 2017 Approved no
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Author Cachet, N.; Ho-A-Kwie, F.; Rivaud, M.; Houel, E.; Deharo, E.; Bourdy, G.; Jullian, V.
Title Picrasin K, a new quassinoid from Quassia amara L. (Simaroubaceae) Type Journal Article
Year 2012 Publication Phytochemistry Letters Abbreviated Journal Phytochem. Lett.
Volume 5 Issue 1 Pages 162-164
Keywords Malaria; P. falciparum; Quassia amara; Quassinoids; Simaroubaceae
Abstract A new quassinoid Picrasin K 1 was isolated from a decoction made of Quassia amara leaves, traditionally used in French Guyana to treat malaria. The structure and relative stereochemistry of 1 was determined through extensive NMR analysis. Picrasin K showed a low activity against Plasmodium falciparum in vitro (IC 50 = 8 μM), and a similar low activity on human cancerous cells line (IC 50 = 7 μM on MCF-7 cells line). © 2011 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.
Address CNRS, UMR Ecofog, Université des Antilles et de la Guyane, Cayenne, France
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Notes (down) Export Date: 8 March 2012; Source: Scopus; doi: 10.1016/j.phytol.2011.12.001; Language of Original Document: English; Correspondence Address: Jullian, V.; UMR-152 Pharma-Dev, IRD, Université Paul Sabatier Toulouse 3, 31062 Toulouse, France; email: jullian@cict.fr Approved no
Call Number EcoFoG @ webmaster @ Serial 382
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Author Rodríguez-Pérez, H.; Hilaire, S.; Mesléard, F.
Title Temporary pond ecosystem functioning shifts mediated by the exotic red swamp crayfish (Procambarus clarkii): a mesocosm study Type Journal Article
Year 2016 Publication Hydrobiologia Abbreviated Journal Hydrobiologia
Volume 767 Issue 1 Pages 333-345
Keywords Ecosystem functioning; Exotic crayfish; Procambarus clarkii; Temporary pond
Abstract Temporary ponds, acknowledged for their conservation value, are colonized by the invasive crayfish Procambarus clarkii. We have tested the consequences of this colonization for the ecosystem under two contrasted scenarios: one single individual arrival or three individuals arrival. We recreated the temporary pond ecosystem in 1 m2 tanks to investigate the impact of the two crayfish densities. We studied the macrophyte community composition and abundance, chlorophyll a and total suspended solids concentrations, and the diversity and functional composition of micro-crustacean and macro-invertebrate communities. We observed a reduction of macrophyte biomass in experimental crayfish mesocosms in comparison with control tanks, nearly 80 and 40% less in 3 and 1 crayfish/m2 tanks, respectively. The macrophyte community shifted, followed by a filamentous algae development, an increase of bare sediment and turbidity in crayfish tanks. The macro-invertebrate community suffered a richness loss of 28 and 22%, in 3 and 1 crayfish/m2 tanks, respectively. Functionally, macro-invertebrate diversity reduction most strongly affected the grazer, detritivore and predator trophic groups. Microcrustaceans seemed not to be affected by the introduction of the crayfish. The introduction of the crayfish greatly altered the ecosystem structure and subsequently the ecosystem functioning. © 2015, Springer International Publishing Switzerland.
Address EcoFoG, Ecologie des Forêts de Guyane, CNRS UMR 8172, Campus Agronomique, BP 316, Kourou Cedex, France
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Notes (down) Export Date: 8 February 2016 Approved no
Call Number EcoFoG @ webmaster @ Serial 655
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Author Touchard, A.; Aili, S.R.; Fox, E.G.P.; Escoubas, P.; Orivel, J.; Nicholson, G.M.; Dejean, A.
Title The biochemical toxin arsenal from ant venoms Type Journal Article
Year 2016 Publication Toxins Abbreviated Journal Toxins
Volume 8 Issue 1 Pages 30
Keywords Alkaloids; Ant venom; Enzymes; Formic acid; Peptides; Toxins; Venom biochemistry
Abstract Ants (Formicidae) represent a taxonomically diverse group of hymenopterans with over 13,000 extant species, the majority of which inject or spray secretions from a venom gland. The evolutionary success of ants is mostly due to their unique eusociality that has permitted them to develop complex collaborative strategies, partly involving their venom secretions, to defend their nest against predators, microbial pathogens, ant competitors, and to hunt prey. Activities of ant venom include paralytic, cytolytic, haemolytic, allergenic, pro-inflammatory, insecticidal, antimicrobial, and pain-producing pharmacologic activities, while non-toxic functions include roles in chemical communication involving trail and sex pheromones, deterrents, and aggregators. While these diverse activities in ant venoms have until now been largely understudied due to the small venom yield from ants, modern analytical and venomic techniques are beginning to reveal the diversity of toxin structure and function. As such, ant venoms are distinct from other venomous animals, not only rich in linear, dimeric and disulfide-bonded peptides and bioactive proteins, but also other volatile and non-volatile compounds such as alkaloids and hydrocarbons. The present review details the unique structures and pharmacologies of known ant venom proteinaceous and alkaloidal toxins and their potential as a source of novel bioinsecticides and therapeutic agents. © 2016 by the authors; licensee MDPI, Basel, Switzerland.
Address Laboratoire Écologie Fonctionnelle et Environnement, 118 Route de Narbonne, Toulouse, France
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Notes (down) Export Date: 8 February 2016 Approved no
Call Number EcoFoG @ webmaster @ Serial 656
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Author Salas-Lopez, A.
Title Predicting resource use in ant species and entire communities by studying their morphological traits: Influence of habitat and subfamily Type Journal Article
Year 2017 Publication Ecological Indicators Abbreviated Journal Ecol. Indic.
Volume 78 Issue Pages 183-191
Keywords Biodiversity-ecosystem functioning relationships; Ecosystem process; Food niche; Formicidae; Habitat filtering; Indicator; Land-use; Morphological traits; Taxonomic conservatism; Biodiversity; Ecology; Indicators (instruments); Land use; Natural resources management; Ecosystem functioning; Ecosystem process; Formicidae; Morphological traits; Taxonomic conservatism; Ecosystems; Formicidae
Abstract I investigated whether the morphological traits of Neotropical ants can be used to infer food resource use by individual species and by entire communities, and whether these relationships are related to habitat type and/or by morphological differences between ant subfamilies. I attracted ants using food baits that represented different ecological processes (e.g. predation, granivory, detritivory, nectarivory) in five habitat types along a land-use gradient (from forests to gardens). I assessed ant activity at the baits and characterized 64 species from six subfamilies according to their food use and community-level resource exploitation intensity in the different habitats. Next, I performed a Mantel test to reveal the relationships between 13 morphological measures and resource use at the species level. I then used ant clades (i.e. subfamily) and habitat to rank the ants along three axes of variation in relation to their morphology and food resource use. Finally, I tested whether associations existed between the community-level exploitation intensity for such resources and the distribution of morphological trait values using the “4th-corner” analysis. Morphological traits were closely linked to the species’ ability to exploit different resources. These relationships were affected by subfamily and, to a lesser extent, by habitat type. The characterization of trait sets for entire communities was not useful, however, in predicting the intensity of the exploitation of different types of resources in varying environmental conditions. I conclude that morphological traits are accurate predictors of the ecology of species, but they should be used with caution when trying to understand community-level patterns. © 2017 Elsevier Ltd
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Author Grau, O.; Peñuelas, J.; Ferry, B.; Freycon, V.; Blanc, L.; Desprez, M.; Baraloto, C.; Chave, J.; Descroix, L.; Dourdain, A.; Guitet, S.; Janssens, I.A.; Sardans, J.; Herault, B.
Title Nutrient-cycling mechanisms other than the direct absorption from soil may control forest structure and dynamics in poor Amazonian soils Type Journal Article
Year 2017 Publication Scientific Reports Abbreviated Journal Sci. Rep.
Volume 7 Issue Pages 45017
Keywords biomass; forest structure; French Guiana; mortality; nutrient availability; nutrient content; nutrient cycling; nutrient uptake; productivity; soil; storage; tropical rain forest
Abstract Tropical forests store large amounts of biomass despite they generally grow in nutrient-poor soils, suggesting that the role of soil characteristics in the structure and dynamics of tropical forests is complex. We used data for >34 000 trees from several permanent plots in French Guiana to investigate if soil characteristics could predict the structure (tree diameter, density and aboveground biomass), and dynamics (growth, mortality, aboveground wood productivity) of nutrient-poor tropical forests. Most variables did not covary with site-level changes in soil nutrient content, indicating that nutrient-cycling mechanisms other than the direct absorption from soil (e.g. the nutrient uptake from litter, the resorption, or the storage of nutrients in the biomass), may strongly control forest structure and dynamics. Ecosystem-level adaptations to low soil nutrient availability and long-term low levels of disturbance may help to account for the lower productivity and higher accumulation of biomass in nutrient-poor forests compared to nutrient-richer forests.
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Author Ter Steege, H.; Henkel, T.W.; Helal, N.; Marimon, B.S.; Marimon-Junior, B.H.; Huth, A.; Groeneveld, J.; Sabatier, D.; Coelho, L.S.; Filho, D.A.L.; Salomão, R.P.; Amaral, I.L.; Matos, F.D.A.; Castilho, C.V.; Phillips, O.L.; Guevara, J.E.; Carim, M.J.V.; Cárdenas López, D.; Magnusson, W.E.; Wittmann, F.; Irume, M.V.; Martins, M.P.; Guimarães, J.R.D.S.; Molino, J.-F.; Bánki, O.S.; Piedade, M.T.F.; Pitman, N.C.A.; Mendoza, A.M.; Ramos, J.F.; Luize, B.G.; Moraes de Leão Novo, E.M.; Núñez Vargas, P.; Silva, T.S.F.; Venticinque, E.M.; Manzatto, A.G.; Reis, N.F.C.; Terborgh, J.; Casula, K.R.; Honorio Coronado, E.N.; Montero, J.C.; Feldpausch, T.R.; Duque, A.; Costa, F.R.C.; Arboleda, N.C.; Schöngart, J.; Killeen, T.J.; Vasquez, R.; Mostacedo, B.; Demarchi, L.O.; Assis, R.L.; Baraloto, C.; Engel, J.; Petronelli, P.; Castellanos, H.; de Medeiros, M.B.; Quaresma, A.; Simon, M.F.; Andrade, A.; Camargo, J.L.; Laurance, S.G.W.; Laurance, W.F.; Rincón, L.M.; Schietti, J.; Sousa, T.R.; de Sousa Farias, E.; Lopes, M.A.; Magalhães, J.L.L.; Mendonça Nascimento, H.E.; Lima de Queiroz, H.; Aymard C, G.A.; Brienen, R.; Revilla, J.D.C.; Vieira, I.C.G.; Cintra, B.B.L.; Stevenson, P.R.; Feitosa, Y.O.; Duivenvoorden, J.F.; Mogollón, H.F.; Araujo-Murakami, A.; Ferreira, L.V.; Lozada, J.R.; Comiskey, J.A.; de Toledo, J.J.; Damasco, G.; Dávila, N.; Draper, F.; García-Villacorta, R.; Lopes, A.; Vicentini, A.; Alonso, A.; Dallmeier, F.; Gomes, V.H.F.; Lloyd, J.; Neill, D.; de Aguiar, D.P.P.; Arroyo, L.; Carvalho, F.A.; de Souza, F.C.; do Amaral, D.D.; Feeley, K.J.; Gribel, R.; Pansonato, M.P.; Barlow, J.; Berenguer, E.; Ferreira, J.; Fine, P.V.A.; Guedes, M.C.; Jimenez, E.M.; Licona, J.C.; Peñuela Mora, M.C.; Villa, B.; Cerón, C.; Maas, P.; Silveira, M.; Stropp, J.; Thomas, R.; Baker, T.R.; Daly, D.; Dexter, K.G.; Huamantupa-Chuquimaco, I.; Milliken, W.; Pennington, T.; Ríos Paredes, M.; Fuentes, A.; Klitgaard, B.; Pena, J.L.M.; Peres, C.A.; Silman, M.R.; Tello, J.S.; Chave, J.; Cornejo Valverde, F.; Di Fiore, A.; Hilário, R.R.; Phillips, J.F.; Rivas-Torres, G.; van Andel, T.R.; von Hildebrand, P.; Noronha, J.C.; Barbosa, E.M.; Barbosa, F.R.; de Matos Bonates, L.C.; Carpanedo, R.S.; Dávila Doza, H.P.; Fonty, É.; GómeZárate Z, R.; Gonzales, T.; Gallardo Gonzales, G.P.; Hoffman, B.; Junqueira, A.B.; Malhi, Y.; Miranda, I.P.A.; Pinto, L.F.M.; Prieto, A.; Rodrigues, D.J.; Rudas, A.; Ruschel, A.R.; Silva, N.; Vela, C.I.A.; Vos, V.A.; Zent, E.L.; Zent, S.; Weiss Albuquerque, B.; Cano, A.; Carrero Márquez, Y.A.; Correa, D.F.; Costa, J.B.P.; Flores, B.M.; Galbraith, D.; Holmgren, M.; Kalamandeen, M.; Nascimento, M.T.; Oliveira, A.A.; Ramirez-Angulo, H.; Rocha, M.; Scudeller, V.V.; Sierra, R.; Tirado, M.; Umaña Medina, M.N.; van der Heijden, G.; Vilanova Torre, E.; Vriesendorp, C.; Wang, O.; Young, K.R.; Ahuite Reategui, M.A.; Baider, C.; Balslev, H.; Cárdenas, S.; Casas, L.F.; Farfan-Rios, W.; Ferreira, C.; Linares-Palomino, R.; Mendoza, C.; Mesones, I.; Torres-Lezama, A.; Giraldo, L.E.U.; Villarroel, D.; Zagt, R.; Alexiades, M.N.; de Oliveira, E.A.; Garcia-Cabrera, K.; Hernandez, L.; Palacios Cuenca, W.; Pansini, S.; Pauletto, D.; Ramirez Arevalo, F.; Sampaio, A.F.; Sandoval, E.H.V.; Valenzuela Gamarra, L.; Levesley, A.; Pickavance, G.; Melgaço, K.
Title Rarity of monodominance in hyperdiverse Amazonian forests Type Journal Article
Year 2019 Publication Scientific reports Abbreviated Journal Scientific reports
Volume 9 Issue 1 Pages 13822
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Abstract Tropical forests are known for their high diversity. Yet, forest patches do occur in the tropics where a single tree species is dominant. Such “monodominant” forests are known from all of the main tropical regions. For Amazonia, we sampled the occurrence of monodominance in a massive, basin-wide database of forest-inventory plots from the Amazon Tree Diversity Network (ATDN). Utilizing a simple defining metric of at least half of the trees over 10cm diameter belonging to one species, we found only a few occurrences of monodominance in Amazonia, and the phenomenon was not significantly linked to previously hypothesized life history traits such wood density, seed mass, ectomycorrhizal associations, or Rhizobium nodulation. In our analysis, coppicing (the formation of sprouts at the base of the tree or on roots) was the only trait significantly linked to monodominance. While at specific locales coppicing or ectomycorrhizal associations may confer a considerable advantage to a tree species and lead to its monodominance, very few species have these traits. Mining of the ATDN dataset suggests that monodominance is quite rare in Amazonia, and may be linked primarily to edaphic factors.
Address Department of Biology, University of Missouri, St. Louis, MO, 63121, USA
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Notes (down) Export Date: 7 October 2019 Approved no
Call Number EcoFoG @ webmaster @ Serial 887
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