| Home | [1–10] << 11 12 13 14 15 16 17 18 19 20 >> [21–30] |
|
| Records | |||||
|---|---|---|---|---|---|
Author  |
Schimann, H.; Joffre, R.; Roggy, J.C.; Lensi, R.; Domenach, A.M. | ||||
| Title | Evaluation of the recovery of microbial functions during soil restoration using near-infrared spectroscopy | Type | Journal Article | ||
| Year | 2007 | Publication | Applied Soil Ecology | Abbreviated Journal | Appl. Soil Ecol. |
| Volume | 37 | Issue | 3 | Pages | 223-232 |
| Keywords | NIRS; microbial activities; respiration; denitrification; carbon; nitrogen; soil functioning; restoration | ||||
| Abstract | Microbial-based indicators, such as C and N contents or microbial functions involved in C and N cycles, are currently used to describe the status of soils in disturbed areas. Microbial functions are more accurate indicators but their measurement for studies at the ecosystem level remains problematical because of the huge spatial variability of these processes and, consequently, of the large number of soil samples which must be analyzed. Our goal was to test the capacity of near-infrared reflectance spectroscopy (NIRS) to predict respiration and denitrification but also carbon and nitrogen contents of soils submitted to various procedures of restoration. To achieve this objective, we took advantage of an experiment conducted on a reforestation system established after open-cast gold mining in French Guiana. In this experimental station, plantations of various ages and various soil textures were at our disposal. Our results showed that both plantations and soil texture had a strong impact on the recovery of soil functioning: carbon and nitrogen contents, respiration and denitrification increased with age of plantation and clay content. Calibrations were performed between spectral data and microbial-based indicators using partial least squares regression (PLS). The results showed that C and N contents were accurately predicted. Microbial functions were less precisely predicted with results more accurate on clayey soils than on sandy soils. In clayey soils, perturbed or restored soils and the year of plantation were discriminated very efficiently through principal component analyses of spectral signatures (over 80% of variance explained on the first two axes). Near-infrared spectroscopy may thus be extended to the prediction of functional soil parameters, but the capacity of this method must be strengthened by expending the databases with other soils in other contexts. The possibility of using NIRS provides many opportunities for understanding both the temporal dynamics and the spatial variability of the recovery of key microbial functions during soil restoration. (c) 2007 Elsevier B.V. All rights reserved. | ||||
| Address | UMR EcoFoG, Kourou 97387, French Guiana, Email: heidy.schimann@cirad.fr | ||||
| Corporate Author | Thesis | ||||
| Publisher | ELSEVIER SCIENCE BV | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0929-1393 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000250668000006 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 154 | ||
| Permanent link to this record | |||||
| Author |
Schimann, H.; Bach, C.; Lengelle, J.; Louisanna, E.; Barantal, S.; Murat, C.; Buée, M. | ||||
| Title | Diversity and Structure of Fungal Communities in Neotropical Rainforest Soils: The Effect of Host Recurrence | Type | Journal Article | ||
| Year | 2017 | Publication | Microbial Ecology | Abbreviated Journal | Microbial Ecology |
| Volume | 73 | Issue | 2 | Pages | 310-320 |
| Keywords | Amazonian forest; Fungal communities; Host recurrence; Litter; Second-generation sequencing; Soil | ||||
| Abstract | The patterns of the distribution of fungal species and their potential interactions with trees remain understudied in Neotropical rainforests, which harbor more than 16,000 tree species, mostly dominated by endomycorrhizal trees. Our hypothesis was that tree species shape the non-mycorrhizal fungal assemblages in soil and litter and that the diversity of fungal communities in these two compartments is partly dependent on the coverage of trees in the Neotropical rainforest. In French Guiana, a long-term plantation and a natural forest were selected to test this hypothesis. Fungal ITS1 regions were sequenced from soil and litter samples from within the vicinity of tree species. A broad range of fungal taxa was found, with 42 orders and 14 classes. Significant spatial heterogeneity in the fungal communities was found without strong variation in the species richness and evenness among the tree plots. However, tree species shaped the fungal assemblages in the soil and litter, explaining up to 18 % of the variation among the communities in the natural forest. These results demonstrate that vegetation cover has an important effect on the structure of fungal assemblages inhabiting the soil and litter in Amazonian forests, illustrating the relative impact of deterministic processes on fungal community structures in these highly diverse ecosystems. © 2016, Springer Science+Business Media New York. | ||||
| Address | Equipe Environnement et Microbiologie, Institut Pluridisciplinaire de Recherche en Environnement et Matériaux, Université de Pau et Pays de l’Adour, Pau, France | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Export Date: 19 February 2017 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 734 | ||
| Permanent link to this record | |||||
| Author |
Schepaschenko, D.; Chave, J.; Phillips, O.L.; Lewis, S.L.; Davies, S.J.; Réjou-Méchain, M.; Sist, P.; Scipal, K.; Perger, C.; Herault, B.; Labrière, N.; Hofhansl, F.; Affum-Baffoe, K.; Aleinikov, A.; Alonso, A.; Amani, C.; Araujo-Murakami, A.; Armston, J.; Arroyo, L.; Ascarrunz, N.; Azevedo, C.; Baker, T.; Bałazy, R.; Bedeau, C.; Berry, N.; Bilous, A.M.; Bilous, S.Y.; Bissiengou, P.; Blanc, L.; Bobkova, K.S.; Braslavskaya, T.; Brienen, R.; Burslem, D.F.R.P.; Condit, R.; Cuni-Sanchez, A.; Danilina, D.; Del Castillo Torres, D.; Derroire, G.; Descroix, L.; Sotta, E.D.; d'Oliveira, M.V.N.; Dresel, C.; Erwin, T.; Evdokimenko, M.D.; Falck, J.; Feldpausch, T.R.; Foli, E.G.; Foster, R.; Fritz, S.; Garcia-Abril, A.D.; Gornov, A.; Gornova, M.; Gothard-Bassébé, E.; Gourlet-Fleury, S.; Guedes, M.; Hamer, K.C.; Susanty, F.H.; Higuchi, N.; Coronado, E.N.H.; Hubau, W.; Hubbell, S.; Ilstedt, U.; Ivanov, V.V.; Kanashiro, M.; Karlsson, A.; Karminov, V.N.; Killeen, T.; Koffi, J.-C.K.; Konovalova, M.; Kraxner, F.; Krejza, J.; Krisnawati, H.; Krivobokov, L.V.; Kuznetsov, M.A.; Lakyda, I.; Lakyda, P.I.; Licona, J.C.; Lucas, R.M.; Lukina, N.; Lussetti, D.; Malhi, Y.; Manzanera, J.A.; Marimon, B.; Junior, B.H.M.; Martinez, R.V.; Martynenko, O.V.; Matsala, M.; Matyashuk, R.K.; Mazzei, L.; Memiaghe, H.; Mendoza, C.; Mendoza, A.M.; Moroziuk, O.V.; Mukhortova, L.; Musa, S.; Nazimova, D.I.; Okuda, T.; Oliveira, L.C.; Ontikov, P.V.; Osipov, A.F.; Pietsch, S.; Playfair, M.; Poulsen, J.; Radchenko, V.G.; Rodney, K.; Rozak, A.H.; Ruschel, A.; Rutishauser, E.; See, L.; Shchepashchenko, M.; Shevchenko, N.; Shvidenko, A.; Silveira, M.; Singh, J.; Sonké, B.; Souza, C.; Stereńczak, K.; Stonozhenko, L.; Sullivan, M.J.P.; Szatniewska, J.; Taedoumg, H.; Ter Steege, H.; Tikhonova, E.; Toledo, M.; Trefilova, O.V.; Valbuena, R.; Gamarra, L.V.; Vasiliev, S.; Vedrova, E.F.; Verhovets, S.V.; Vidal, E.; Vladimirova, N.A.; Vleminckx, J.; Vos, V.A.; Vozmitel, F.K.; Wanek, W.; West, T.A.P.; Woell, H.; Woods, J.T.; Wortel, V.; Yamada, T.; Nur Hajar, Z.S.; Zo-Bi, I.C. | ||||
| Title | The Forest Observation System, building a global reference dataset for remote sensing of forest biomass | Type | Journal Article | ||
| Year | 2019 | Publication | Scientific data | Abbreviated Journal | |
| Volume | 6 | Issue | 198 | Pages | |
| Keywords | |||||
| Abstract | Forest biomass is an essential indicator for monitoring the Earth's ecosystems and climate. It is a critical input to greenhouse gas accounting, estimation of carbon losses and forest degradation, assessment of renewable energy potential, and for developing climate change mitigation policies such as REDD+, among others. Wall-to-wall mapping of aboveground biomass (AGB) is now possible with satellite remote sensing (RS). However, RS methods require extant, up-to-date, reliable, representative and comparable in situ data for calibration and validation. Here, we present the Forest Observation System (FOS) initiative, an international cooperation to establish and maintain a global in situ forest biomass database. AGB and canopy height estimates with their associated uncertainties are derived at a 0.25 ha scale from field measurements made in permanent research plots across the world's forests. All plot estimates are geolocated and have a size that allows for direct comparison with many RS measurements. The FOS offers the potential to improve the accuracy of RS-based biomass products while developing new synergies between the RS and ground-based ecosystem research communities. | ||||
| Address | FRIM Forest Research Institute of Malaysia, 52109 Kepong, Selangor, Kuala Lumpur, Malaysia | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Export Date: 21 October 2019 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 889 | ||
| Permanent link to this record | |||||
| Author |
Sayer, E.J.; Rodtassana, C.; Sheldrake, M.; Bréchet, L.M.; Ashford, O.S.; Lopez-Sangil, L.; Kerdraon-Byrne, D.; Castro, B.; Turner, B.L.; Wright, S.J.; Tanner, E.V.J. | ||||
| Title | Revisiting nutrient cycling by litterfall—Insights from 15 years of litter manipulation in old-growth lowland tropical forest | Type | Journal Article | ||
| Year | 2020 | Publication | Advances in Ecological Researc | Abbreviated Journal | Adv. Ecol. Res. |
| Volume | 62 | Issue | Pages | 173-223 | |
| Keywords | Forest floor; Litter addition; Litter removal; Litterfall; Nutrient cycling; Nutrient use efficiency; Soil fertility; Trace elements; Tropical lowland forest | ||||
| Abstract | The crucial role of tropical forests in the global carbon balance is underpinned by their extraordinarily high biomass and productivity, even though the majority of tropical forests grow on nutrient-poor soils. Nutrient cycling by litterfall has long been considered essential for maintaining high primary productivity in lowland tropical forests but few studies have tested this assumption experimentally. We review and synthesise findings from the Gigante Litter Manipulation Project (GLiMP), a long-term experiment in lowland tropical forest in Panama, Central America, in which litter has been removed from or added to large-scale plots for 15 years. We assessed changes in soil and litter nutrient concentrations in response to the experimental treatments and estimated nutrient return and nutrient use efficiency to indicate changes in nutrient cycling. The soil concentrations of most nutrients increased with litter addition and declined with litter removal. Litter removal altered nitrogen, potassium, manganese and zinc cycling, demonstrating the importance of litter inputs for maintaining the availability of these elements to plants. By contrast, litter addition only altered nitrogen cycling and, despite low concentrations of available soil phosphorus, the effects of litter manipulation on phosphorus cycling were inconsistent. We discuss potential mechanisms underlying the observed changes, and we emphasise the importance of decomposition processes in the forest floor for retaining nutrient elements, which partially decouples nutrient cycling from the mineral soil. Finally, by synthesising GLiMP studies conducted during 15 years of litter manipulation, we highlight key knowledge gaps and avenues for future research into tropical forest nutrient cycling. © 2020 Elsevier Ltd | ||||
| Address | Teagasc, Johnstown Castle, Wexford, Ireland | ||||
| Corporate Author | Thesis | ||||
| Publisher | Academic Press Inc. | Place of Publication | Editor | Dumbrell A.J.; Turner E.C.; Fayle T.M. | |
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | Advances in Ecological Research | ||
| Series Volume | 62 | Series Issue | Edition | ||
| ISSN | 00652504 (Issn); 9780128211342 (Isbn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 1001 | ||
| Permanent link to this record | |||||
| Author |
Sarmiento, C.; Patino, S.; Paine, C.E.T.; Beauchene, J.; Thibaut, A.; Baraloto, C. | ||||
| Title | Within-Individual Variation of Trunk and Branch Xylem Density in Tropical Trees | Type | Journal Article | ||
| Year | 2011 | Publication | American Journal of Botany | Abbreviated Journal | Am. J. Bot. |
| Volume | 98 | Issue | 1 | Pages | 140-149 |
| Keywords | branch xylem density; French Guiana; functional trait; tropical trees; trunk xylem density; wood economics | ||||
| Abstract | Premise of the study : Wood density correlates with mechanical and physiological strategies of trees and is important for estimating global carbon stocks. Nonetheless, the relationship between branch and trunk xylem density has been poorly explored in neotropical trees. Here, we examine this relationship in trees from French Guiana and its variation among different families and sites, to improve the understanding of wood density in neotropical forests. Methods : Trunk and branch xylem densities were measured for 1909 trees in seven sites across French Guiana. A major-axis fit was performed to explore their general allometric relationship and its variation among different families and sites. Key results : Trunk xylem and branch xylem densities were significantly positively correlated, and their relationship explained 47% of the total variance. Trunk xylem was on average 9% denser than branch xylem. Family-level differences and interactions between family and site accounted for more than 40% of the total variance, whereas differences among sites explained little variation. Conclusions : Variation in xylem density within individual trees can be substantial, and the relationship between branch xylem and trunk xylem densities varies considerably among families and sites. As such, whole-tree biomass estimates based on non-destructive branch sampling should correct for both taxonomic and environmental factors. Furthermore, detailed estimates of the vertical distribution of wood density within individual trees are needed to determine the extent to which relying solely upon measures of trunk wood density may cause carbon stocks in tropical forests to be overestimated. | ||||
| Address | [Sarmiento, Carolina; Patino, Sandra; Baraloto, Christopher] INRA, UMR Ecol Forets Guyane, Kourou 97310, French Guiana, Email: carolinasar@gmail.com | ||||
| Corporate Author | Thesis | ||||
| Publisher | BOTANICAL SOC AMER INC | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0002-9122 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | ISI:000285747900019 | Approved | no | ||
| Call Number | EcoFoG @ eric.marcon @ | Serial | 290 | ||
| Permanent link to this record | |||||
| Author |
Sardans, J.; Urbina, I.; Grau, O.; Asensio, D.; Ogaya, R.; Peñuelas, J. | ||||
| Title | Long-term drought decreases ecosystem C and nutrient storage in a Mediterranean holm oak forest | Type | Journal Article | ||
| Year | 2020 | Publication | Environmental and Experimental Botany | Abbreviated Journal | Environ. Exp. Bot. |
| Volume | 177 | Issue | 104135 | Pages | |
| Keywords | Aridity; Carbon stocks; Climate change; Nitrogen; Phosphorus; Potassium; Stoichiometry; carbon sequestration; deciduous forest; drought; experimental study; forest soil; long-term change; Mediterranean environment; net ecosystem exchange; nutrient cycling; shrub; stoichiometry; Mediterranean Sea; Phillyrea latifolia | ||||
| Abstract | Aridity has increased in recent decades in the Mediterranean Basin and is projected to continue to increase in the coming decades. We studied the consequences of drought on the concentrations, stoichiometries and stocks of carbon (C), nitrogen (N), phosphorus (P) and potassium (K) in leaves, foliar litter of a three dominant woody species and soil of a Mediterranean montane holm oak forest where soil-water content was experimentally reduced (15 % lower than the control plots) for 15 years. Nitrogen stocks were lower in the drought plots than in the control plots (8.81 ± 1.01 kg ha−1 in the forest canopy and 856 ± 120 kg ha−1 in the 0−15 cm soil layer), thus representing 7 and 18 % lower N stocks in the canopy and soil respectively. δ15N was consistently higher under drought conditions in all samples, indicating a general loss of N. Foliar C and K stocks were also lower but to a lesser extent than N. Decreases in biomass and C and N stocks due to drought were smallest for the most dominant tall shrub, Phillyrea latifolia, so our results suggest a lower capacity of this forest to store C and nutrients but also substantial resulting changes in forest structure with increasing drought. © 2020 Elsevier B.V. | ||||
| Address | Cirad, UMR EcoFoG (AgroParisTech, CNRS, Inra, Univ Antilles, Univ Guyane), Campus Agronomique, Kourou, 97310, French Guiana | ||||
| Corporate Author | Thesis | ||||
| Publisher | Elsevier B.V. | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 00988472 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 954 | ||
| Permanent link to this record | |||||
| Author |
Santiago, L.S.; De Guzman, M.E.; Baraloto, C.; Vogenberg, J.E.; Brodie, M.; Hérault, B.; Fortunel, C.; Bonal, D. | ||||
| Title | Coordination and trade-offs among hydraulic safety, efficiency and drought avoidance traits in Amazonian rainforest canopy tree species | Type | Journal Article | ||
| Year | 2018 | Publication | New Phytologist | Abbreviated Journal | New Phytol. |
| Volume | 218 | Issue | 3 | Pages | 1015-1024 |
| Keywords | Amazonian forest; cavitation; drought; hydraulic conductivity; sapwood capacitance; turgor loss point; wood density; xylem; cavitation; climate change; drought; forest canopy; forest ecosystem; hydraulic conductivity; rainforest; species diversity; tree; tropical forest; vulnerability; wood; Amazonia; French Guiana; Paracou | ||||
| Abstract | Predicting responses of tropical forests to climate change-type drought is challenging because of high species diversity. Detailed characterization of tropical tree hydraulic physiology is necessary to evaluate community drought vulnerability and improve model parameterization. Here, we measured xylem hydraulic conductivity (hydraulic efficiency), xylem vulnerability curves (hydraulic safety), sapwood pressure–volume curves (drought avoidance) and wood density on emergent branches of 14 common species of Eastern Amazonian canopy trees in Paracou, French Guiana across species with the densest and lightest wood in the plot. Our objectives were to evaluate relationships among hydraulic traits to identify strategies and test the ability of easy-to-measure traits as proxies for hard-to-measure hydraulic traits. Xylem efficiency was related to capacitance, sapwood water content and turgor loss point, and other drought avoidance traits, but not to xylem safety (P50). Wood density was correlated (r = −0.57 to −0.97) with sapwood pressure–volume traits, forming an axis of hydraulic strategy variation. In contrast to drier sites where hydraulic safety plays a greater role, tropical trees in this humid tropical site varied along an axis with low wood density, high xylem efficiency and high capacitance at one end of the spectrum, and high wood density and low turgor loss point at the other. | ||||
| Address | INRA, UMR Silva, AgroParisTech, Université de Lorraine, Nancy, 54000, France | ||||
| Corporate Author | Thesis | ||||
| Publisher | Blackwell Publishing Ltd | Place of Publication | Editor | ||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 0028646x (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Cited By :6; Export Date: 3 December 2018; Coden: Nepha; Correspondence Address: Santiago, L.S.; Department of Botany & Plant Sciences, University of California, 2150 Batchelor Hall, United States; email: santiago@ucr.edu; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, FEDER 2014–2020; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, Project; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD, GY0006894; Funding details: University of California, UC; Funding details: National Institute of Food and Agriculture, NIFA; Funding details: ANR-10-LABX-0025; Funding text 1: We would like to thank Benôıt Burban and Jean-Yves Goret for laboratory support, Jocelyn Cazal and Valentine Alt for skillfully climbing trees for samples, Aurelie Dourdain for database support, and Clement Stahl, John Sperry, Sean Gleason, Todd Dawson, Steve Davis, JoséLuiz Silva, Aleyda Acosta Rangel and three anonymous reviewers for comments and discussions on the data presented. The study has been supported by the TRY initiative on plant traits (http://www.try-db.org). The TRY initiative and database is hosted, developed and maintained by J. Kattge and G. Boenisch (Max Planck Institute for Biogeochemistry, Jena, Germany). TRY is currently supported by Future Earth/ bioDISCOVERY and the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig. We also acknowledge the University of California, Botany and Plant Sciences Department and the USDA National Institute of Food and Agriculture for support. We are grateful to the CIRAD and the GFclim project (FEDER 2014–2020, Project GY0006894) for financial support of the Paracou research station. Funding for fieldwork and data acquisition was provided by Investissement d’Avenir grants of the French ANR (CEBA: ANR-10-LABX-0025), through the ‘DRAMA’ and ‘HydroSTAT’ projects.; References: Allen, C.D., Macalady, A.K., Chenchouni, H., Bachelet, D., McDowell, N., Vennetier, M., Kitzberger, T., Hogg, E.H., A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests (2010) Forest Ecology and Management, 259, pp. 660-684; Anderegg, W.R.L., Berry, J.A., Smith, D.D., Sperry, J.S., Anderegg, L.D.L., Field, C.B., The roles of hydraulic and carbon stress in a widespread climate-induced forest die-off (2012) Proceedings of the National Academy of Sciences, USA, 109, pp. 233-237; Anderegg, W.R.L., Klein, T., Bartlett, M., Sack, L., Pellegrini, A.F.A., Choat, B., Jansen, S., Meta-analysis reveals that hydraulic traits explain cross-species patterns of drought-induced tree mortality across the globe (2016) Proceedings of the National Academy of Sciences, USA, 113, pp. 5024-5029; Baraloto, C., Goldberg, D.E., Bonal, D., Performance trade-offs among tropical tree seedlings in contrasting microhabitats (2005) Ecology, 86, pp. 2461-2472; Baraloto, C., Hardy, O.J., Paine, C., Dexter, K.G., Cruaud, C., Dunning, L.T., Gonzalez, M.A., Savolainen, V., Using functional traits and phylogenetic trees to examine the assembly of tropical tree communities (2012) Journal of Ecology, 100, pp. 690-701; Barnard, D.M., Meinzer, F.C., Lachenbruch, B., McCulloh, K.A., Johnson, D.M., Woodruff, D.R., Climate-related trends in sapwood biophysical properties in two conifers: avoidance of hydraulic dysfunction through coordinated adjustments in xylem efficiency, safety and capacitance (2011) Plant, Cell & Environment, 34, pp. 643-654; Bartlett, M.K., Scoffoni, C., Sack, L., The determinants of leaf turgor loss point and prediction of drought tolerance of species and biomes: a global meta-analysis (2012) Ecology Letters, 15, pp. 393-405; Beer, C., Reichstein, M., Tomelleri, E., Ciais, P., Jung, M., Carvalhais, N., Rodenbeck, C., Bonan, G.B., Terrestrial gross carbon dioxide uptake: global distribution and covariation with climate (2010) Science, 329, pp. 834-838; Benjamini, Y., Hochberg, Y., On the adaptive control of the false discovery rate in multiple testing with independent statistics (2000) Journal of educational and Behavioral Statistics, 25, pp. 60-83; Bonal, D., Bosc, A., Ponton, S., Goret, J.-Y., Burban, B., Gross, P., Bonnefond, J., Epron, D., Impact of severe dry season on net ecosystem exchange in the Neotropical rainforest of French Guiana (2008) Global Change Biology, 14, pp. 1917-1933; Bonal, D., Burban, B., Stahl, C., Wagner, F., Herault, B., The response of tropical rainforests to drought-lessons from recent research and future prospects (2016) Annals of Forest Science, 73, pp. 27-44; Borchert, R., Pockman, W.T., Water storage capacitance and xylem tension in isolated branches of temperate and tropical trees (2005) Tree Physiology, 25, pp. 457-466; Bucci, S.J., Goldstein, G., Scholz, F.G., Meinzer, F.C., Physiological significance of hydraulic segmentation, nocturnal transpiration and capacitance in tropical trees: paradigms revisited (2016) Tropical tree physiology: adaptations and responses in a changing environment, pp. 205-225. , In, Goldstein G, Santiago LS, eds., Cham, Switzerland, Springer International; Chave, J., Coomes, D., Jansen, S., Lewis, S.L., Swenson, N.G., Zanne, A.E., Towards a worldwide wood economics spectrum (2009) Ecology Letters, 12, pp. 351-366; Choat, B., Drayton, W.M., Brodersen, C., Matthews, M.A., Shackel, K.A., Wada, H., McElrone, A.J., Measurement of vulnerability to water stress-induced cavitation in grapevine: a comparison of four techniques applied to a long-vesseled species (2010) Plant, Cell & Environment, 33, pp. 1502-1512; Choat, B., Jansen, S., Brodribb, T.J., Cochard, H., Delzon, S., Bhaskar, R., Bucci, S.J., Hacke, U.G., Global convergence in the vulnerability of forests to drought (2012) Nature, 491, pp. 752-755; Christoffersen, B.O., Gloor, M., Fauset, S., Fyllas, N.M., Galbraith, D.R., Baker, T.R., Kruijt, B., Binks, O.J., Linking hydraulic traits to tropical forest function in a size-structured and trait-driven model (TFS v. 1-Hydro) (2016) Geoscientific Model Development, 9, pp. 4227-4255; De Guzman, M.E., Santiago, L.S., Schnitzer, S.A., Álvarez-Cansino, L., Trade-offs between water transport capacity and drought resistance in neotropical canopy liana and tree species (2017) Tree Physiology, 37, pp. 1404-1414; Dray, S., Dufour, A.-B., The ade4 package: implementing the duality diagram for ecologists (2007) Journal of Statistical Software, 22, pp. 1-20; Fortunel, C., Ruelle, J., Beauchene, J., Fine, P.V.A., Baraloto, C., Wood specific gravity and anatomy of branches and roots in 113 Amazonian rainforest tree species across environmental gradients (2014) New Phytologist, 202, pp. 79-94; Fu, R., Yin, L., Li, W.H., Arias, P.A., Dickinson, R.E., Huang, L., Chakraborty, S., Fisher, R., Increased dry-season length over southern Amazonia in recent decades and its implication for future climate projection (2013) Proceedings of the National Academy of Sciences, USA, 110, pp. 18110-18115; Gleason, S.M., Westoby, M., Jansen, S., Choat, B., Hacke, U.G., Pratt, R.B., Bhaskar, R., Cao, K.-F., Weak tradeoff between xylem safety and xylem-specific hydraulic efficiency across the world's woody plant species (2016) New Phytologist, 209, pp. 123-136; Gourlet-Fleury, S., Guehl, J.-M., Laroussinie, O., (2004) Ecology and management of a neotropical rainforest. Lessons drawn from Paracou, a long-term experimental research site in French Guiana, , Paris, France, Elsevier; Hacke, U.G., Sperry, J.S., Wheeler, J.K., Castro, L., Scaling of angiosperm xylem structure with safety and efficiency (2006) Tree Physiology, 26, pp. 689-701; Holtum, J.A.M., Winter, K., Elevated [CO2] and forest vegetation: more a water issue than a carbon issue? (2010) Functional Plant Biology, 37, pp. 694-702; Huntingford, C., Zelazowski, P., Galbraith, D., Mercado, L.M., Sitch, S., Fisher, R., Lomas, M., Booth, B.B.B., Simulated resilience of tropical rainforests to CO2-induced climate change (2013) Nature Geoscience, 6, pp. 268-273; Joetzjer, E., Delire, C., Douville, H., Ciais, P., Decharme, B., Fisher, R., Christoffersen, B., Ferreira, L.V., Predicting the response of the Amazon rainforest to persistent drought conditions under current and future climates: a major challenge for global land surface models (2014) Geoscientific Model Development, 7, pp. 2933-2950; Joetzjer, E., Douville, H., Delire, C., Ciais, P., Present-day and future Amazonian precipitation in global climate models: CMIP5 versus CMIP3 (2013) Climate Dynamics, 41, pp. 2921-2936; Kattge, J., Díaz, S., Lavorel, S., Prentice, I.C., Leadley, P., Bönisch, G., Garnier, E., Wright, I.J., TRY – a global database of plant traits (2011) Global Change Biology, 17, pp. 2905-2935; Maherali, H., Pockman, W.T., Jackson, R.B., Adaptive variation in the vulnerability of woody plants to xylem cavitation (2004) Ecology, 85, pp. 2184-2199; Manzoni, S., Vico, G., Katul, G., Palmroth, S., Jackson, R.B., Porporato, A., Hydraulic limits on maximum plant transpiration and the emergence of the safety–efficiency trade-off (2013) New Phytologist, 198, pp. 169-178; Maréchaux, I., Bartlett, M.K., Sack, L., Baraloto, C., Engel, J., Joetzjer, E., Chave, J., Drought tolerance as predicted by leaf water potential at turgor loss point varies strongly across species within an Amazonian forest (2015) Functional Ecology, 29, pp. 1268-1277; Martínez-Vilalta, J., Piñol, J., Beven, K., A hydraulic model to predict drought-induced mortality in woody plants: an application to climate change in the Mediterranean (2002) Ecological Modelling, 155, pp. 127-147; Medlyn, B.E., De Kauwe, M.G., Duursma, R.A., New developments in the effort to model ecosystems under water stress (2016) New Phytologist, 212, pp. 5-7; Meinzer, F.C., Goldstein, G., Scaling up from leaves to whole plants and canopies for photosynthetic gas exchange (1996) Tropical forest plant ecophysiology, pp. 114-138. , In, Mulkey SS, Chazdon RL, Smith AP, eds., New York, NY, USA, Chapman & Hall; Meinzer, F.C., James, S.A., Goldstein, G., Woodruff, D., Whole-tree water transport scales with sapwood capacitance in tropical forest canopy trees (2003) Plant, Cell & Environment, 26, pp. 1147-1155; Meinzer, F.C., Johnson, D.M., Lachenbruch, B., McCulloh, K.A., Woodruff, D.R., Xylem hydraulic safety margins in woody plants: coordination of stomatal control of xylem tension with hydraulic capacitance (2009) Functional Ecology, 23, pp. 922-930; Meinzer, F.C., Woodruff, D.R., Domec, J.C., Goldstein, G., Campanello, P.I., Gatti, M.G., Villalobos-Vega, R., Coordination of leaf and stem water transport properties in tropical forest trees (2008) Oecologia, 156, pp. 31-41; Mencuccini, M., Minunno, F., Salmon, Y., Martínez-Vilalta, J., Hölttä, T., Coordination of physiological traits involved in drought-induced mortality of woody plants (2015) New Phytologist, 208, pp. 396-409; Morris, H., Plavcova, L., Cvecko, P., Fichtler, E., Gillingham, M.A.F., Martinez-Cabrera, H.I., McGlinn, D.J., Zieminska, K., A global analysis of parenchyma tissue fractions in secondary xylem of seed plants (2016) New Phytologist, 209, pp. 1553-1565; Phillips, O.L., van der Heijden, G., Lewis, S.L., Lopez-Gonzalez, G., Aragao, L., Lloyd, J., Malhi, Y., Davila, E.A., Drought-mortality relationships for tropical forests (2010) New Phytologist, 187, pp. 631-646; Pike, N., Using false discovery rates for multiple comparisons in ecology and evolution (2011) Methods in Ecology and Evolution, 2, pp. 278-282; Pivovaroff, A.L., Pasquini, S.C., De Guzman, M.E., Alstad, K.P., Stemke, J., Santiago, L.S., Multiple strategies for drought survival among woody plant species (2016) Functional Ecology, 30, pp. 517-526; Pockman, W.T., Sperry, J.S., Vulnerability to xylem cavitation and the distribution of Sonoran desert vegetation (2000) American Journal of Botany, 87, pp. 1287-1299; Preston, K.A., Cornwell, W.K., DeNoyer, J.L., Wood density and vessel traits as distinct correlates of ecological strategy in 51 California coast range angiosperms (2006) New Phytologist, 170, pp. 807-818; (2015) R: a language and environment for statistical computing, , Vienna, Austria, R Core Development Team; Saatchi, S.S., Harris, N.L., Brown, S., Lefsky, M., Mitchard, E.T.A., Salas, W., Zutta, B.R., Hagen, S., Benchmark map of forest carbon stocks in tropical regions across three continents (2011) Proceedings of the National Academy of Sciences, USA, 108, pp. 9899-9904; Sack, L., Pasquet-Kok, J., (2011) Leaf pressure–volume curve parameters, , http://prometheuswiki.publish.csiro.au/tiki-index.php?page=Leaf+pressure-volume+curve+parameters, [WWW document] URL, [accessed 9 August 2016] In Prometheus Wiki; Santiago, L.S., Bonal, D., De Guzman, M.E., Ávila-Lovera, E., Drought survival strategies of tropical trees (2016) Tropical tree physiology: adaptations and responses in a changing environment, pp. 243-258. , In, Goldstein G, Santiago LS, eds., Cham, Switzerland, Springer International; Santiago, L.S., Goldstein, G., Meinzer, F.C., Fisher, J.B., Machado, K., Woodruff, D., Jones, T., Leaf photosynthetic traits scale with hydraulic conductivity and wood density in Panamanian forest canopy trees (2004) Oecologia, 140, pp. 543-550; Scholz, F.G., Bucci, S.J., Goldstein, G., Meinzer, F.C., Franco, A.C., Miralles-Wilhelm, F., Biophysical properties and functional significance of stem water storage tissues in Neotropical savanna trees (2007) Plant, Cell & Environment, 30, pp. 236-248; Scholz, F., Phillips, N., Bucci, S., Meinzer, F., Goldstein, G., Hydraulic capacitance: biophysics and functional significance of internal water sources in relation to tree size (2011) Size- and age-related changes in tree structure and function, pp. 341-361. , In, Meinzer FC, Lachenbruch B, Dawson TE, eds., Dordrecht, the Netherlands, Springer; Sperry, J.S., Donnelly, J.R., Tyree, M.T., A method for measuring hydraulic conductivity and embolism in xylem (1988) Plant, Cell & Environment, 11, pp. 35-40; Sperry, J.S., Meinzer, F.C., McCulloh, K.A., Safety and efficiency conflicts in hydraulic architecture: scaling from tissues to trees (2008) Plant, Cell & Environment, 31, pp. 632-645; ter Steege, H., Pitman, N.C.A., Phillips, O.L., Chave, J., Sabatier, D., Duque, A., Molino, J.-F., Castellanos, H., Continental-scale patterns of canopy tree composition and function across Amazonia (2006) Nature, 443, pp. 444-447; Taiz, L., Zeiger, E., Møller, I.M., Murphy, A., (2015) Plant physiology and development, , Sunderland, MA, USA, Sinauer Associates; Tyree, M., Negative turgor pressure in plant cells: fact or fallacy? (1976) Canadian Journal of Botany, 54, pp. 2738-2746; Tyree, M.T., Davis, S.D., Cochard, H., Biophysical perspectives of xylem evolution: is there a tradeoff of hydraulic efficiency for vulnerability to dysfunction? (1994) IAWA Journal, 15, pp. 335-360; Tyree, M.T., Ewers, F.W., The hydraulic architecture of trees and other woody plants (1991) New Phytologist, 119, pp. 345-360; Webb, C.O., Donoghue, M.J., Phylomatic: tree assembly for applied phylogenetics (2005) Molecular Ecology Notes, 5, pp. 181-183; Wheeler, J.K., Sperry, J.S., Hacke, U.G., Hoang, N., Inter-vessel pitting and cavitation in woody Rosaceae and other vesselled plants: a basis for a safety versus efficiency trade-off in xylem transport (2005) Plant, Cell & Environment, 28, pp. 800-812; Xu, C., McDowell, N.G., Sevanto, S., Fisher, R.A., Our limited ability to predict vegetation dynamics under water stress (2013) New Phytologist, 200, pp. 298-300; Xu, X.T., Medvigy, D., Powers, J.S., Becknell, J.M., Guan, K.Y., Diversity in plant hydraulic traits explains seasonal and inter-annual variations of vegetation dynamics in seasonally dry tropical forests (2016) New Phytologist, 212, pp. 80-95; Zanne, A.E., Tank, D.C., Cornwell, W.K., Eastman, J.M., Smith, S.A., FitzJohn, R.G., McGlinn, D.J., Reich, P.B., Three keys to the radiation of angiosperms into freezing environments (2014) Nature, 506, pp. 89-92; Zanne, A.E., Westoby, M., Falster, D.S., Ackerly, D.D., Loarie, S.R., Arnold, S.E.J., Coomes, D.A., Angiosperm wood structure: global patterns in vessel anatomy and their relation to wood density and potential conductivity (2010) American Journal of Botany, 97, pp. 207-215 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 842 | ||
| Permanent link to this record | |||||
| Author |
Salvin, P.; Roos, C.; Robert, F. | ||||
| Title | Tropical mangrove sediments as a natural inoculum for efficient electroactive biofilms | Type | Journal Article | ||
| Year | 2012 | Publication | Bioresource Technology | Abbreviated Journal | Bioresour. Technol. |
| Volume | 120 | Issue | Pages | 45-51 | |
| Keywords | Chronoamperometry; Cyclic voltammetry; Electroactive biofilms; Microbial fuel cells; Three-electrode systems | ||||
| Abstract | Chronoamperometry is known to be an efficient way to form electroactive biofilms (EAB) on conductive electrodes. For the first time, tropical mangrove sediments are analyzed as a potential inoculum to form MFC anodes with the use of acetate as substrate. The performance of the EAB-coated carbon cloth electrodes are evaluated according to the maximal current density, the coulombic efficiency and the cyclic voltammogramms. Working electrodes (WE) polarized at -0.2V/SCE gave better results compared to -0.4V/SCE and 0.0V/SCE. The maximal current density attained was 12A/m 2 with a CE of 24%. Contributions of the EAB in the generation of current were discussed and mechanisms of electronic transfer by the bacteria were discussed. Epifluorescence and SEM images showed the evolution of the biofilms on the electrode surface and the heterogeneity of the structure. © 2012 Elsevier Ltd. | ||||
| Address | Laboratoire des Matériaux et des Molécules en Milieu Amazonien, Université des Antilles et de la Guyane, UAG-UMR ECOFOG, F-97337 Cayenne, French Guiana | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | 09608524 (Issn) | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Export Date: 16 August 2012; Source: Scopus; Coden: Birte; doi: 10.1016/j.biortech.2012.05.131; Language of Original Document: English; Correspondence Address: Robert, F.; Laboratoire des Matériaux et des Molécules en Milieu Amazonien, Université des Antilles et de la Guyane, UAG-UMR ECOFOG, F-97337 Cayenne, French Guiana; email: florent.robert@guyane.univ-ag.fr | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 421 | ||
| Permanent link to this record | |||||
| Author |
Salvin, P.; Ondel, O.; Roos, C.; Robert, F. | ||||
| Title | Energy harvest with mangrove benthic microbial fuel cells | Type | Journal Article | ||
| Year | 2015 | Publication | International Journal of Energy Research | Abbreviated Journal | Int J Energy Res |
| Volume | 39 | Issue | 4 | Pages | 543-556 |
| Keywords | Balancing circuit; Benthic microbial fuel cell; Efficiency; Energy harvesting | ||||
| Abstract | Benthic microbial fuel cells (BMFCs) are continuous electricity generators using electroactive microorganisms and organic matter from aquatic environment, respectively, as catalysts and substrate. In this paper, first a low-cost PVC-made structure is constructed to harvest electricity from mangrove environment located in French Guiana. An in situ BMFC has given power density of 30mW/m2 of the anodic surface area. This performance has been confirmed by experience in laboratory where inter-electrode distance and electrode surface area appeared to be power increasing factors. However, the output power of one BMFC is not used to supply real devices such as autonomous sensors. Second, to meet this expectation, in parallel and in series associations were considered. These associations were made in order to increase the output voltage and consequently the power, to reach levels that can supply small sensors (about 3V). Finally, to improve the performance of the series association and to avoid the voltage reversal phenomenon, a voltage balancing circuit was simulated and added to the series connections. With balancing method, the cell voltage of BMFCs can be equalized, and the performances can be improved. This allows an optimal energy harvesting and a better global efficiency of the set. | ||||
| Address | Université de Lyon, F-69622, Lyon, France, Université Lyon 1, Villeurbanne; CNRS, UMR 5005, Laboratoire Ampère, 43, Boulevard du 11 Novembre 1918Villeurbanne, France | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Export Date: 17 March 2015 | Approved | no | ||
| Call Number | EcoFoG @ webmaster @ | Serial | 586 | ||
| Permanent link to this record | |||||
| Author |
Salhi, L.; Nait-Rabah, O.; Deyrat, C.; Roos, C. | ||||
| Title | Numerical Modeling of Single Helical Pile Behavior under Compressive Loading in Sand | Type | Journal Article | ||
| Year | 2013 | Publication | Electronic Journal of Geotechnical Engineering | Abbreviated Journal | Electron. J. Geotech. Eng. |
| Volume | 18 | Issue | Bundle T | Pages | 4119-4338 |
| Keywords | helical pile; finite element method; failure mechanisms; sand | ||||
| Abstract | The present research deals with helical piles behavior in cohesionless soil through finite element modeling. An approach of modeling of the screw-pile geometry has been proposed through the Finite Element Analysis (FEA) computer program Plaxis. The numerical results are compared with measurements from large scale test and the bearing capacity has been estimated using both cylindrical and individual bearing model. Moreover, different failure criterions have been applied to estimate the ultimate capacity. The effect of spacing ratio (S/Dh) on the screw-pile behavior has been further studied. It has found that results from the model fit the field results. Through the study of the load transfer mechanism, the transition from cylindrical shear to individual plate behavior occurs at a value of spacing ratio (1.5 to 2). | ||||
| Address | Laboratoire des matériaux et molécules en milieu amazonien, EcoFoG-Université des Antilles-Guyane, 97351 Cayenne, French Guiana | ||||
| Corporate Author | Thesis | ||||
| Publisher | Place of Publication | Editor | |||
| Language | Summary Language | Original Title | |||
| Series Editor | Series Title | Abbreviated Series Title | |||
| Series Volume | Series Issue | Edition | |||
| ISSN | ISBN | Medium | |||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | EcoFoG @ webmaster @ | Serial | 525 | ||
| Permanent link to this record | |||||