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Verheyen, K.; Vanhellemont, M.; Auge, H.; Baeten, L.; Baraloto, C.; Barsoum, N.; Bilodeau-Gauthier, S.; Bruelheide, H.; Castagneyrol, B.; Godbold, D.; Haase, J.; Hector, A.; Jactel, H.; Koricheva, J.; Loreau, M.; Mereu, S.; Messier, C.; Muys, B.; Nolet, P.; Paquette, A.; Parker, J.; Perring, M.; Ponette, Q.; Potvin, C.; Reich, P.; Smith, A.; Weih, M.; Scherer-Lorenzen, M. |
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Contributions of a global network of tree diversity experiments to sustainable forest plantations |
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Journal Article |
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2016 |
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Ambio |
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Ambio |
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45 |
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1 |
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29-41 |
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Biodiversity experiments; Ecological restoration; Functional biodiversity research; Plantation forest; Sustainable forest management |
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The area of forest plantations is increasing worldwide helping to meet timber demand and protect natural forests. However, with global change, monospecific plantations are increasingly vulnerable to abiotic and biotic disturbances. As an adaption measure we need to move to plantations that are more diverse in genotypes, species, and structure, with a design underpinned by science. TreeDivNet, a global network of tree diversity experiments, responds to this need by assessing the advantages and disadvantages of mixed species plantations. The network currently consists of 18 experiments, distributed over 36 sites and five ecoregions. With plantations 1–15 years old, TreeDivNet can already provide relevant data for forest policy and management. In this paper, we highlight some early results on the carbon sequestration and pest resistance potential of more diverse plantations. Finally, suggestions are made for new, innovative experiments in understudied regions to complement the existing network. © 2015, Royal Swedish Academy of Sciences. |
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Department of Crop Production Ecology, Swedish University of Agricultural Sciences, PO Box 7043, Uppsala, Sweden |
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Export Date: 29 January 2016 |
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EcoFoG @ webmaster @ |
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652 |
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Perz, S.G.; Qiu, Y.; Xia, Y.; Southworth, J.; Sun, J.; Marsik, M.; Rocha, K.; Passos, V.; Rojas, D.; Alarcón, G.; Barnes, G.; Baraloto, C. |
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Trans-boundary infrastructure and land cover change: Highway paving and community-level deforestation in a tri-national frontier in the Amazon |
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2013 |
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Land Use Policy |
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34 |
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27-41 |
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Amazon; Brazil, Peru; Globalization; Infrastructure; Land |
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Economic globalization manifests in landscapes through regional integration initiatives involving trans-boundary infrastructure. While the relationships of roads, accessibility and land cover are well-understood, they have rarely been considered across borders in national frontier regions. We therefore pursue an analysis of infrastructure connectivity and land cover change in the tri-national frontier of the southwestern Amazon where Bolivia, Brazil and Peru meet, and where the Inter-Oceanic Highway has recently been paved. We integrate satellite, survey, climate and other data for a sample of rural communities that differ in terms of highway paving across the tri-national frontier. We employ a suite of explanatory variables tied to road paving and other factors that vary both across and within the three sides of the frontier in order to model their importance for deforestation. A multivariate analysis of non-forest land cover during 2005-2010 confirms the importance of paving status and travel times, as well as land tenure and other factors. These findings indicate that integration affects land cover, but does not eliminate the effects of other factors that vary across the frontier, which bears implications for the study of globalization, trans-boundary infrastructure, environmental governance and land cover change. © 2013 Elsevier Ltd. |
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Department of Biology, University of Florida, Gainesville, FL 32611, United States |
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Export Date: 14 March 2013; Source: Scopus |
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EcoFoG @ webmaster @ |
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475 |
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Bonal, D.; Burban, B.; Stahl, C.; Wagner, F.; Herault, B. |
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The response of tropical rainforests to drought—lessons from recent research and future prospects |
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Journal Article |
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2016 |
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Annals of Forest Science |
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Annals of Forest Science |
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73 |
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1 |
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27-44 |
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Carbon; Climate; Drought; Global change; Growth; Mortality; Soil; Tropical; Water |
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Key message: We review the recent findings on the influence of drought on tree mortality, growth or ecosystem functioning in tropical rainforests. Drought plays a major role in shaping tropical rainforests and the response mechanisms are highly diverse and complex. The numerous gaps identified here require the international scientific community to combine efforts in order to conduct comprehensive studies in tropical rainforests on the three continents. These results are essential to simulate the future of these ecosystems under diverse climate scenarios and to predict the future of the global earth carbon balance. Context: Tropical rainforest ecosystems are characterized by high annual rainfall. Nevertheless, rainfall regularly fluctuates during the year and seasonal soil droughts do occur. Over the past decades, a number of extreme droughts have hit tropical rainforests, not only in Amazonia but also in Asia and Africa. The influence of drought events on tree mortality and growth or on ecosystem functioning (carbon and water fluxes) in tropical rainforest ecosystems has been studied intensively, but the response mechanisms are complex. Aims: Herein, we review the recent findings related to the response of tropical forest ecosystems to seasonal and extreme droughts and the current knowledge about the future of these ecosystems. Results: This review emphasizes the progress made over recent years and the importance of the studies conducted under extreme drought conditions or in through-fall exclusion experiments in understanding the response of these ecosystems. It also points to the great diversity and complexity of the response of tropical rainforest ecosystems to drought. Conclusion: The numerous gaps identified here require the international scientific community to combine efforts in order to conduct comprehensive studies in tropical forest regions. These results are essential to simulate the future of these ecosystems under diverse climate scenarios and to predict the future of the global earth carbon balance. © 2015, INRA and Springer-Verlag France. |
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National Institute for Space Research (INPE), São José dos Campos, SP, Brazil |
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Export Date: 7 March 2016 |
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EcoFoG @ webmaster @ |
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669 |
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Engel, J.; Brousseau, L.; Baraloto, C. |
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GuiaTreeKey, a multi-access electronic key to identify tree genera in French Guiana |
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Journal Article |
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2016 |
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PhytoKeys |
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PhytoKeys |
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68 |
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1 |
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27-44 |
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Amazonia; Electronic key; French Guiana; Morphological characters; Neotropics; Trees identification; Xper2 |
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The tropical rainforest of Amazonia is one of the most species-rich ecosystems on earth, with an estimated 16000 tree species. Due to this high diversity, botanical identification of trees in the Amazon is difficult, even to genus, often requiring the assistance of parataxonomists or taxonomic specialists. Advances in informatics tools offer a promising opportunity to develop user-friendly electronic keys to improve Amazonian tree identification. Here, we introduce an original multi-access electronic key for the identification of 389 tree genera occurring in French Guiana terra-firme forests, based on a set of 79 morphological characters related to vegetative, floral and fruit characters. Its purpose is to help Amazonian tree identification and to support the dissemination of botanical knowledge to non-specialists, including forest workers, students and researchers from other scientific disciplines. The electronic key is accessible with the free access software Xper2, and the database is publicly available on figshare: https://figshare.com/s/75d890b7d707e0ffc9bf (doi: 10.6084/m9.figshare.2682550). © Julien Engel et al. |
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International Center for Tropical Botany, Department of Biological Sciences, Florida International University, 11200 SW 8th Street, Miami, FL, United States |
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Export Date: 8 September 2016 |
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EcoFoG @ webmaster @ |
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693 |
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Djenontin Tindo, S.; Amusant, N.; Dangou, J.; Wotto, D.V.; Avlessi, F.; Dahouénon-Ahoussi, E.; Lozano, P.; Pioch, D.; Sohounhloué, K.C.D. |
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Screening of Repellent, Termiticidal and Preventive activities on Wood, of Azadirachta indica and Carapa procera (Meliaceae) seeds oils |
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2012 |
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International Research Journal of Biological Sciences |
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ISCA J. Biological Sci. |
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1 |
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3 |
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25-29 |
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International Science Congress Association |
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EcoFoG @ webmaster @ |
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462 |
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Fine, P.V.A.; Baraloto, C. |
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Habitat Endemism in White-sand Forests: Insights into the Mechanisms of Lineage Diversification and Community Assembly of the Neotropical Flora |
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Journal Article |
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2016 |
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Biotropica |
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Biotropica |
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48 |
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1 |
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24-33 |
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Amazon; Endemic; Functional traits; Habitat specialization; Niche conservatism; Speciation |
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White-sand forests represent natural laboratories of evolution over their long history throughout Amazonia and the Guiana Shield and pose significant physiological challenges to the plants and animals they host. The study of diversification in plant lineages comprising species endemic to white-sand forest can therefore give insights into processes of evolution and community assembly in tropical forests. In this article, we synthesize recent studies of white-sand forests to integrate patterns of plant species distribution with processes of lineage diversification and community assembly in the white-sand flora. We contrast lineages that have radiated uniquely in these habitats (e.g., Pagamea, Rubiaceae), with cosmopolitan lineages comprising specialists to white-sand forests and other habitats that may have arisen via ecological speciation across habitat gradients (e.g., Protium, Burseraceae). In both cases, similar suites of functional traits have evolved, including investment in dense, long-lived tissues that are well-defended structurally and chemically. White-sand endemics, therefore, play an important role in biodiversity conservation because they represent unique combinations of functional and phylogenetic diversity. Furthermore, white-sand endemics may respond differently than other tropical forest plant species to contemporary global changes because they comprise resilient functional types that may better withstand increased drought, temperature, and invasions of exotic pests in these regions. © 2016 The Association for Tropical Biology and Conservation. |
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Department of Biological Sciences and International Center for Tropical Botany, Florida International University, Miami, FL, United States |
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Cited By :3; Export Date: 12 February 2016 |
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EcoFoG @ webmaster @ |
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659 |
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Vincent, G.; Sabatier, D.; Blanc, L.; Chave, J.; Weissenbacher, E.; Pélissier, R.; Fonty, E.; Molino, J.-F.; Couteron, P. |
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Title |
Accuracy of small footprint airborne LiDAR in its predictions of tropical moist forest stand structure |
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Journal Article |
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2012 |
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Remote Sensing of Environment |
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Remote Sens. Environ. |
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125 |
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Basal area; Lidar; Tropical moist forest |
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We predict stand basal area (BA) from small footprint LiDAR data in 129 one-ha tropical forest plots across four sites in French Guiana and encompassing a great diversity of forest structures resulting from natural (soil and geological substrate) and anthropogenic effects (unlogged and logged forests). We use predictors extracted from the Canopy Height Model to compare models of varying complexity: single or multiple regressions and nested models that predict BA by independent estimates of stem density and quadratic mean diameter. Direct multiple regression was the most accurate, giving a 9.6% Root Mean Squared Error of Prediction (RMSEP). The magnitude of the various errors introduced during the data collection stage is evaluated and their contribution to MSEP is analyzed. It was found that these errors accounted for less than 10% of model MSEP, suggesting that there is considerable scope for model improvement. Although site-specific models showed lower MSEP than global models, stratification by site may not be the optimal solution. The key to future improvement would appear to lie in a stratification that captures variations in relations between LiDAR and forest structure. © 2012 Elsevier Inc. |
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ONF, Direction régionale de la Guyane, Cayenne, 97300 France |
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00344257 (Issn) |
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Export Date: 9 August 2012; Source: Scopus; Article in Press; Coden: Rseea; doi: 10.1016/j.rse.2012.06.019; Language of Original Document: English; Correspondence Address: Vincent, G.; IRD AMAP CIRAD, TA A-51/PS2, 34398 Montpellier cedex 5, Franceemail: gregoire.vincent@ird.fr |
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EcoFoG @ webmaster @ |
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418 |
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Malé, P.-J.G.; Leroy, C.; Lusignan, L.; Petitclerc, F.; Quilichini, A.; Orivel, J. |
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The reproductive biology of the myrmecophyte, Hirtella physophora, and the limitation of negative interactions between pollinators and ants |
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2015 |
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Arthropod-Plant Interactions |
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Arthropod-Plant Interactions |
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9 |
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1 |
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23-31 |
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Ant-plant; Ant–pollinator interactions; Floral structure and display; Plant reproductive biology; Spatial and temporal segregation |
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Myrmecophytism occurs in plants that offer ants a nesting space and, often, food rewards in exchange for protection from predators and competitors. Such biotic protection by ants can, however, interfere with the activity of pollinators leading to potential negative consequences for the plant’s reproduction. In this study, we focused on the association between the understory myrmecophyte, Hirtella physophora (Chrysobalanaceae), and its obligate ant partner, Allomerus decemarticulatus (Myrmicinae). We investigated the reproductive biology of H. physophora and the putative mechanisms that may limit ant–pollinator conflict. Our results show that H. physophora is an obligate outcrosser, self-incompatible, and potentially insect-pollinated species. The reproduction of H. physophora relies entirely on pollen transfer by pollinators that are likely quite specific. Potential interference between flower-visiting insects during pollination may also be lessened by a spatial and temporal segregation of ant and pollinator activities, thus enabling pollen transfer and fruit production. © 2014, Springer Science+Business Media Dordrecht. |
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IRD, UMR AMAP (botAnique et bioinforMatique de l’Architecture des Plantes), Boulevard de la Lironde, TA A-51/PS2Montpellier Cedex 5, France |
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Export Date: 9 April 2015 |
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EcoFoG @ webmaster @ |
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593 |
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Dulormne, M.; Musseau, O.; Muller, F.; Toribio, A.; Bâ, A. |
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Effects of NaCl on growth, water status, N2 fixation, and ion distribution in Pterocarpus officinalis seedlings |
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2010 |
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Plant and Soil |
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Plant and Soil |
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327 |
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Bradyrhizobium; Leaf water potential; Nodulation; Salt; Swamp forest |
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Pterocarpus officinalis (Fabaceae) dominates in the swamp forests of the Lesser Antilles, submitted to strong variations of soil salinity (30-445 mM). This study aimed to assess the effect of salinity on growth, nodulation, N2 fixation, water status and ions content in P. officinalis and to clarify the mechanisms involved. Seedlings inoculated or not with two strains from areas of contrasting salinity levels (< to 50 or 445 mM) were watered with 0, 171 and 342 mM solutions of NaCl in greenhouse conditions. Non-inoculated seedlings were tolerant to a salinity of 171 mM, with no significant effect on seedling biomass. Evapotranspiration per unit of leaf area (E/TLa) remained unchanged at 171 mM. Maintenance of a constant E/TLa and especially the control of ion transport to the upper parts of the plant could explain seedling salt tolerance up to intermediate salinity conditions (171 mM). The two strains have a 99.8% genetic identity in spite of differences in their original habitats, this explaining the similar response of the symbiosis to salinity. The higher salt sensitivity of inoculated seedlings was linked to the sensitivity of both Bradyrhizobium strains (reduction of free-living cells) and to that of the nodulation process (fewer nodules and inhibition of N2-fixation) to intermediate salinity. © Springer Science + Business Media B.V. 2009. |
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LSTM-UMR 113, Université des Antilles et de la Guyane, UFR des Sciences Exactes et Naturelles, B.P. 592, 97159 Pointe-à-Pitre, Guadeloupe (F.W.I.), France |
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Cited By :12; Export Date: 7 February 2017 |
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EcoFoG @ webmaster @ |
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727 |
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Maia, A.C.D.; Gibernau, M.; Carvalho, A.T.; Gonçalves, E.G.; Schlindwein, C. |
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The cowl does not make the monk: Scarab beetle pollination of the Neotropical aroid Taccarum ulei (Araceae: Spathicarpeae) |
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2013 |
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Biological Journal of the Linnean Society |
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108 |
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1 |
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22-34 |
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Flower predation; Nocturnal pollinators; Pollination syndromes; Scarabaeidae; Thermogenesis |
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Taccarum ulei (Araceae, Spathicarpeae) is a seasonal geophytic aroid, native to north-eastern Brazil, that flowers during two months of the rainy season. Patterns of floral thermogenesis, pollination biology, and floral traits associated with pollination syndromes were studied and compared with those of other Araceae. Two species of cyclocephaline scarabs (Scarabaeidae, Cyclocephalini) were recognized as effective pollinators: Cyclocephala celata and Cyclocephala cearae. Larvae of an unidentified species of fruit fly (Melanolomaspp., Richardiidae, Diptera) were also frequently observed in inflorescences at various maturation stages, feeding on the connectives of male florets and fruits, and thus lowering the reproductive success of individual plants. Beetles were attracted by odoriferous inflorescences in the early evening of the first day of anthesis, during the female phase. The emission of attractive volatiles was coupled with intense thermogenic activity in the entire spadix, unlike other aroids in which only certain zones of the spadix heat up. Pollen release, which marks the beginning of the male phase on the subsequent evening, was not related to floral thermogenesis. Comparative multivariate analysis of the floral traits of T.ulei points to a beetle-pollinated aroid, although some of the observed traits of the species are not common to other taxa sharing this pollination strategy. Such incongruence might be explained by the evolutionary history of the tribe Spathicarpeae and potential pollinator shifts. © 2012 The Linnean Society of London. |
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Departamento de Botânica, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil |
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Export Date: 3 January 2013; Source: Scopus |
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no |
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EcoFoG @ webmaster @ |
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453 |
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