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Author (down) Dejean, A.; Compin, A.; Delabie, J.H.C.; Azémar, F.; Corbara, B.; Leponce, M. url  doi
openurl 
  Title Biotic and abiotic determinants of the formation of ant mosaics in primary Neotropical rainforests Type Journal Article
  Year 2019 Publication Ecological Entomology Abbreviated Journal Ecol Entomol  
  Volume 44 Issue 4 Pages 560-570  
  Keywords Ant mosaics; connections on the ground; host tree attractiveness; indicators of disturbance; primary Neotropical rainforest; territoriality  
  Abstract 1. Ants are widespread in tropical rainforests, including in the canopy where territorially dominant arboreal species represent the main part of the arthropod biomass.
2. By mapping the territories of dominant arboreal ant species and using a null model analysis and a pairwise approach this study was able to show the presence of an ant mosaic on the upper canopy of a primary Neotropical rainforest (c. 1ha sampled; 157 tall trees from 28 families). Although Neotropical rainforest canopies are frequently irregular, with tree crowns at different heights breaking the continuity of the territories of dominant ants, the latter are preserved via underground galleries or trails laid on the ground.
3. The distribution of the trees influences the structure of the ant mosaic, something related to the attractiveness of tree taxa for certain arboreal ant species rather than others.
4. Small-scale natural disturbances, most likely strong winds in the area studied (presence of canopy gaps), play a role by favouring the presence of two ant species typical of secondary formations: Camponotus femoratus and Crematogaster levior, which live in parabiosis (i.e. share territories and nests but lodge in different cavities) and build conspicuous ant gardens. In addition, pioneer Cecropia myrmecophytic trees were recorded.
 
  Address  
  Corporate Author Thesis  
  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0307-6946 ISBN Medium  
  Area Expedition Conference  
  Notes doi: 10.1111/een.12735 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 882  
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Author (down) Courtois, E. A.; Stahl, C.; Burban, B.; Van Den Berge, J.; Berveiller, D.; Bréchet, L.; Larned Soong, J.; Arriga, N.; Peñuelas, J.; August Janssens, I. pdf  url
doi  openurl
  Title Automatic high-frequency measurements of full soil greenhouse gas fluxes in a tropical forest Type Journal Article
  Year 2019 Publication Biogeosciences Abbreviated Journal Biogeosciences  
  Volume 16 Issue 3 Pages 785-796  
  Keywords  
  Abstract Measuring in situ soil fluxes of carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) continuously at high frequency requires appropriate technology. We tested the combination of a commercial automated soil CO 2 flux chamber system (LI-8100A) with a CH 4 and N 2 O analyzer (Picarro G2308) in a tropical rainforest for 4 months. A chamber closure time of 2 min was sufficient for a reliable estimation of CO 2 and CH 4 fluxes (100% and 98.5% of fluxes were above minimum detectable flux – MDF, respectively). This closure time was generally not suitable for a reliable estimation of the low N 2 O fluxes in this ecosystem but was sufficient for detecting rare major peak events. A closure time of 25 min was more appropriate for reliable estimation of most N 2 O fluxes (85.6% of measured fluxes are above MDF±0.002 nmolm -2 s -1 ). Our study highlights the importance of adjusted closure time for each gas. © Author(s) 2019.  
  Address CREAF, Cerdanyola Del Vallès, Catalonia, 08193, Spain  
  Corporate Author Thesis  
  Publisher Copernicus GmbH Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 17264170 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 25 February 2019; Correspondence Address: Alice Courtois, E.; Department of Biology University of Antwerp, Centers of Excellence Global Change Ecology and PLECO (Plants and Ecosystems), Universiteitsplein 1, Belgium; email: courtoiselodie@gmail.com; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD; Funding details: European Research Council, ERC, ERC-2013-SyG 610028-IMBALANCE-P; Funding details: ANR-10-LABX-25-01, ANR-11-INBS-0001; Funding details: U.S. Department of Energy, DOE, DE-AC02-05CH11231; Funding details: Agence Nationale de la Recherche, ANR; Funding details: Institut National de la Recherche Agronomique, INRA; Funding details: Fonds Wetenschappelijk Onderzoek, FWO; Funding text 1: Acknowledgements. This research was supported by the European Research Council Synergy grant ERC-2013-SyG 610028-IMBALANCE-P. We thank Jan Segers for help in the initial setting of the system and Renato Winkler from Picarro and Rod Madsen and Jason Hupp from LI-COR for their help in combining the systems. We thank the staff of Paracou station, managed by UMR Ecofog (CIRAD, INRA; Kourou), which received support from “Investissement d’Avenir” grants managed by Agence Nationale de la Recherche (CEBA: ANR-10-LABX-25-01, ANAEE-France: ANR-11-INBS-0001). This study was conducted in collaboration with the Guyaflux program belonging to SOERE F-ORE-T, which is supported annually by Ecofor, Allenvi, and the French national research infrastructure, ANAEE-F. This program also received support from an “investissement d’avenir” grant from the Agence Nationale de la Recherche (CEBA, ref ANR-10-LABX-25-01). Ivan August Janssens acknowledges support from Antwerp University (Methusalem funding), Nicola Arriga from ICOS-Belgium and Fonds Wetenschappelijk Onderzoek (FWO), and Jennifer Larned Soong from the U.S. Department of Energy under contract DE-AC02-05CH11231.; References: Aguilos, M., Hérault, B., Burban, B., Wagner, F., Bonal, D., What drives long-Term variations in carbon flux and balance in a tropical rainforest in French Guiana? (2018) Agr. Forest Meteorol, 253, pp. 114-123; Ambus, P., Skiba, U., Drewer, J., Jones, S., Carter, M.S., Albert, K.R., Sutton, M., Development of an accumulation-based system for cost-effective chamber measurements of inert trace gas fluxes (2010) Eur. J. Soil Sci, 61, pp. 785-792; Arias-Navarro, C., Díaz-Pinés, E., Klatt, S., Brandt, P., Rufino, M.C., Butterbach-Bahl, K., Verchot, L., Spatial variability of soil N2O and CO2 fluxes in different topographic positions in a tropical montane forest in Kenya (2017) J. Geophys. Res.-Biogeo, 122, pp. 514-527; 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) Glob. Change Biol, 14, pp. 1917-1933; Bréchet, L., Ponton, S., Roy, J., Freycon, V., Coteaux, M.-M., Bonal, D., Epron, D., Do tree species characteristics influence soil respiration in tropical forests? A test based on 16 tree species planted in monospecific plots (2009) Plant Soil, 319, pp. 235-246; Breuer, L., Papen, H., Butterbach-Bahl, K., N2O emission from tropical forest soils of Australia (2000) J. Geophys. Res.-Atmos, 105, pp. 26353-26367; Christiansen, J.R., Outhwaite, J., Smukler, S.M., Comparison of CO2, CH4 and N2O soil-Atmosphere exchange measured in static chambers with cavity ring-down spectroscopy and gas chromatography (2015) Agr. Forest Meteorol, 211, pp. 48-57; Courtois, E.A., Stahl, C., Dataset from Automatic high-frequency measurements of full soil greenhouse gas fluxes in a tropical forest (2019) Biogeosciences, 2019. , https://doi.org/10.5281/zenodo.2555299; Courtois, E.A., Stahl, C., Van Den Berge, J., Bréchet, L., Van Langenhove, L., Richter, A., Urbina, I., Janssens, I.A., Spatial variation of soil CO2, CH4 and N2O fluxes across topographical positions in tropical forests of the Guiana Shield (2018) Ecosystems, 21, pp. 1445-1458; Davidson, E., Savage, K., Verchot, L., Navarro, R., Minimizing artifacts and biases in chamber-based measurements of soil respiration (2002) Agr. Forest Meteorol, 113, pp. 21-37; Davidson, E.A., Nepstad, D.C., Ishida, F.Y., Brando, P.M., Effects of an experimental drought and recovery on soil emissions of carbon dioxide, methane, nitrous oxide, and nitric oxide in a moist tropical forest (2008) Glob. Change Biol, 14, pp. 2582-2590; De Klein, C., Harvey, M., (2012) Nitrous Oxide Chamber Methodology Guidelines, , Ministry for Primary Industries, Wellington, New Zealand; Denmead, O., Chamber systems for measuring nitrous oxide emission from soils in the field (1979) Soil Sci. Soc. Am. J, 43, pp. 89-95; Dutaur, L., Verchot, L.V., A global inventory of the soil CH4 sink (2007) Glob. Biogeochem. Cy, p. 21. , https://doi.org/10.1029/2006GB002734; Epron, D., Bosc, A., Bonal, D., Freycon, V., Spatial variation of soil respiration across a topographic gradient in a tropical rain forest in French Guiana (2006) J. Trop. Ecol, 22, pp. 565-574; (1998) World Reference Base for Soil Resources, , FAO/ ISRIC/ISSS.FAO, ISRIC, ISSS, World Soil Resources Reports 84, Rome; Görres, C.-M., Kammann, C., Ceulemans, R., Automation of soil flux chamber measurements, potentials and pitfalls (2016) Biogeosciences, 13, pp. 1949-1966. , https://doi.org/10.5194/bg-13-1949-2016; Hupp, J.R., Garcia, R.L., Madsen, R., McDermitt, D.K., Measurement of CO2 evolution in a multiplexed flask system (2009) Amer. Soc. Horticultural Science, Alexandria USA, 44, pp. 1143-1143; Janssens, I.A., Kowalski, A.S., Longdoz, B., Ceulemans, R., Assessing forest soil CO2 efflux, an in-situ comparison of four techniques (2000) Tree Physiol, 20, pp. 23-32; Koskinen, M., Minkkinen, K., Ojanen, P., Kämäräinen, M., Laurila, T., Lohila, A., Measurements of CO2 exchange with an automated chamber system throughout the year, challenges in measuring night-Time respiration on porous peat soil (2014) Biogeosciences, 11, pp. 347-363. , https://doi.org/10.5194/bg-11-347-2014; Kostyanovsky, K., Huggins, D., Stockle, C., Waldo, S., Lamb, B., Developing a flow through chamber system for automated measurements of soil N2O and CO2 emissions (2018) Measurement, 113, pp. 172-180; Merbold, L., Wohlfahrt, G., Butterbach-Bahl, K., Pilegaard, K., DelSontro, T., Stoy, P., Zona, D., Preface, Towards a full greenhouse gas balance of the biosphere (2015) Biogeosciences, 12, pp. 453-456. , https://doi.org/10.5194/bg-12-453-2015; Nickerson, N., (2016) Evaluating Gas Emission Measurements Using Minimum Detectable Flux (MDF), , Eosense Inc., Dartmouth, Nova Scotia, Canada; Nicolini, G., Castaldi, S., Fratini, G., Valentini, R., A literature overview of micrometeorological CH4 and N2O flux measurements in terrestrial ecosystems (2013) Atmos. Environ, 81, pp. 311-319; O'Connell, C.S., Ruan, L., Silver, W.L., Drought drives rapid shifts in tropical rainforest soil biogeochemistry and greenhouse gas emissions (2018) Nat. Commun, 9, p. 1348. , https://doi.org/10.1038/s41467-018-03352; Oertel, C., Matschullat, J., Zurba, K., Zimmermann, F., Erasmi, S., Greenhouse gas emissions from soils-A review (2016) Chem. Erde-Geochem, 76, pp. 327-352; Petitjean, C., Hénault, C., Perrin, A.-S., Pontet, C., Metay, A., Bernoux, M., Jehanno, T., Roggy, J.-C., Soil N2O emissions in French Guiana after the conversion of tropical forest to agriculture with the chop-And-mulch method (2015) Agr. Ecosyst. Environ, 208, pp. 64-74; Petrakis, S., Seyfferth, A., Kan, J., Inamdar, S., Vargas, R., Influence of experimental extreme water pulses on greenhouse gas emissions from soils (2017) Biogeochemistry, 133, pp. 147-164; Petrakis, S., Barba, J., Bond-Lamberty, B., Vargas, R., Using greenhouse gas fluxes to define soil functional types (2017) Plant Soil, pp. 1-10; Pumpanen, J., Kolari, P., Ilvesniemi, H., Minkkinen, K., Vesala, T., Niinistö, S., Lohila, A., Pihlatie, M., Comparison of different chamber techniques for measuring soil CO2 efflux (2004) Agr. Forest Meteorol, 123, pp. 159-176; Rowland, L., Hill, T.C., Stahl, C., Siebicke, L., Burban, B., Zaragoza-Castells, J., Ponton, S., Williams, M., Evidence for strong seasonality in the carbon storage and carbon use efficiency of an Amazonian forest (2014) Glob. Change Biol, 20, pp. 979-991; Rubio, V.E., Detto, M., Spatiotemporal variability of soil respiration in a seasonal tropical forest (2017) Ecol. Evol, 7, pp. 7104-7116; Savage, K., Phillips, R., Davidson, E., High temporal frequency measurements of greenhouse gas emissions from soils (2014) Biogeosciences, 11, pp. 2709-2720. , https://doi.org/10.5194/bg-11-2709-2014; Silver, W.L., Lugo, A., Keller, M., Soil oxygen availability and biogeochemistry along rainfall and topographic gradients in upland wet tropical forest soils (1999) Biogeochemistry, 44, pp. 301-328; Teh, Y.A., Diem, T., Jones, S., Huaraca Quispe, L.P., Baggs, E., Morley, N., Richards, M., Meir, P., Methane and nitrous oxide fluxes across an elevation gradient in the tropical Peruvian Andes (2014) Biogeosciences, 11, pp. 2325-2339. , https://doi.org/10.5194/bg-11-2325-2014; Verchot, L.V., Davidson, E.A., Cattânio, H., Ackerman, I.L., Erickson, H.E., Keller, M., Land use change and biogeochemical controls of nitrogen oxide emissions from soils in eastern Amazonia (1999) Global Biogeochem. Cy, 13, pp. 31-46; Verchot, L.V., Davidson, E.A., Cattânio, J.H., Ackerman, I.L., Land-use change and biogeochemical controls of methane fluxes in soils of eastern Amazonia (2000) Ecosystems, 3, pp. 41-56; Wagner, F., Hérault, B., Stahl, C., Bonal, D., Rossi, V., Modeling water availability for trees in tropical forests (2011) Agr. Forest Meteorol, 151, pp. 1202-1213 Approved no  
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Author (down) Clair, B.; Ghislain, B.; Prunier, J.; Lehnebach, R.; Beauchene, J.; Alméras, T. pdf  url
doi  openurl
  Title Mechanical contribution of secondary phloem to postural control in trees: the bark side of the force Type Journal Article
  Year 2019 Publication New Phytologist Abbreviated Journal New Phytol  
  Volume 221 Issue 1 Pages 209-217  
  Keywords bark; Malvaceae; maturation stress; secondary phloem; tree biomechanics  
  Abstract Summary To grow straight, plants need a motor system that controls posture by generating forces to offset gravity. This motor function in trees was long thought to be only controlled by internal forces induced in wood. Here we provide evidence that bark is involved in the generation of mechanical stresses in several tree species. Saplings of nine tropical species were grown tilted and staked in a shadehouse and the change in curvature of the stem was measured after releasing from the pole and after removing the bark. This first experiment evidenced the contribution of bark in the up-righting movement of tree stems. Combined mechanical measurements of released strains on adult trees and microstructural observations in both transverse and longitudinal/tangential plane enabled us to identify the mechanism responsible for the development of asymmetric mechanical stress in the bark of stems of these species. This mechanism does not result from cell wall maturation like in wood, or from the direct action of turgor pressure like in unlignified organs, but is the consequence of the interaction between wood radial pressure and a smartly organized trellis structure in the inner bark.  
  Address  
  Corporate Author Thesis  
  Publisher John Wiley & Sons, Ltd (10.1111) Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0028-646x ISBN Medium  
  Area Expedition Conference  
  Notes doi: 10.1111/nph.15375 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 853  
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Author (down) Ciminera, M.; Auger-Rozenberg, M.-A.; Caron, H.; Herrera, M.; Scotti-Saintagne, C.; Scotti, I.; Tysklind, N.; Roques, A. url  doi
openurl 
  Title Genetic Variation and Differentiation of Hylesia metabus (Lepidoptera: Saturniidae): Moths of Public Health Importance in French Guiana and in Venezuela Type Journal Article
  Year 2019 Publication Journal of medical entomology Abbreviated Journal J. Med. Entomol.  
  Volume 56 Issue 1 Pages 137-148  
  Keywords  
  Abstract Hylesia moths impact human health in South America, inducing epidemic outbreaks of lepidopterism, a puriginous dermatitis caused by the urticating properties of females' abdominal setae. The classification of the Hylesia genus is complex, owing to its high diversity in Amazonia, high intraspecific morphological variance, and lack of interspecific diagnostic traits which may hide cryptic species. Outbreaks of Hylesia metabus have been considered responsible for the intense outbreaks of lepidopterism in Venezuela and French Guiana since the C20, however, little is known about genetic variability throughout the species range, which is instrumental for establishing control strategies on H. metabus. Seven microsatellites and mitochondrial gene markers were analyzed from Hylesia moths collected from two major lepidopterism outbreak South American regions. The mitochondrial gene sequences contained significant genetic variation, revealing a single, widespread, polymorphic species with distinct clusters, possibly corresponding to populations evolving in isolation. The microsatellite markers validated the mitochondrial results, and suggest the presence of three populations: one in Venezuela, and two in French Guiana. All moths sampled during outbreak events in French Guiana were assigned to a single coastal population. The causes and implications of this finding require further research.  
  Address INRA, Unité de Recherche Ecologie des forêts méditerranéennes, Avignon, UR629, France  
  Corporate Author Thesis  
  Publisher NLM (Medline) Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 19382928 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 1 February 2019 Approved no  
  Call Number EcoFoG @ webmaster @ Serial 857  
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Author (down) Chaves, C.L.; Blanc-Jolivet, C.; Sebbenn, A.M.; Mader, M.; Meyer-Sand, B.R.V.; Paredes-Villanueva, K.; Honorio Coronado, E.N.; Garcia-Davila, C.; Tysklind, N.; Troispoux, V.; Massot, M.; Degen, B. url  doi
openurl 
  Title Nuclear and chloroplastic SNP markers for genetic studies of timber origin for Hymenaea trees Type Journal Article
  Year 2019 Publication Conservation Genetics Resources Abbreviated Journal Conserv. Gen. Res.  
  Volume 11 Issue 3 Pages 329-331  
  Keywords DNA fingerprints; Geographical origin; MiSeq; RADSeq  
  Abstract We developed nuclear and chloroplastic single nucleotide polymorphism (SNP) and INDEL (insertion/deletion) markers using restriction associated DNA sequencing (RADSeq) and low coverage MiSeq genome sequencing to set up a genetic tracking method of the geographical origin of Hymenaea sp. From two initial sets of 358 and 32 loci used to genotype at least 94 individuals, a final set of 75 nSNPs, 50 cpSNPs and 6 INDELs identifying significant population structure was developed. © 2018, Springer Nature B.V.  
  Address Departamento de Fitotecnia, Faculdade de Engenharia de Ilha Solteira, Universidade Estadual Paulista, Ilha Solteira, SP, Brazil  
  Corporate Author Thesis  
  Publisher Springer Netherlands Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 18777252 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 908  
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Author (down) Céréghino, R.; Corbara, B.; Hénaut, Y.; Bonhomme, C.; Compin, A.; Dejean, A. url  doi
openurl 
  Title Ant and spider species as surrogates for functional community composition of epiphyte-associated invertebrates in a tropical moist forest Type Journal Article
  Year 2019 Publication Ecological Indicators Abbreviated Journal  
  Volume 96 Issue Pages 694-700  
  Keywords Functional traits; Indicator species; Phytotelmata; Rainforests; Surrogacy; Tank bromeliads  
  Abstract Epiphytes represent up to 50% of all plant species in rainforests, where they host a substantial amount of invertebrate biomass. Efficient surrogates for epiphyte invertebrate communities could reduce the cost of biomonitoring surveys while preventing destructive sampling of the plants. Here, we focus on the invertebrate communities associated to tank bromeliads. We ask whether the presence of particular ant and/or spider taxa (easily surveyed taxa) that use these plants as nesting and/or foraging habitats predicts functional trait combinations of aquatic invertebrate communities hosted by the plants. Functional community composition of invertebrates was predicted both by bromeliad habitat features and the presence of certain ant and spider species. The ant Azteca serica preferred wider bromeliad rosettes that trap large amount of detritus, indicating interstitial-like food webs dominated by deposit feeders that burrow in fine particulate organic matter. Leucauge sp. spiders preferred narrower bromeliad rosettes bearing smaller detrital loads, thereby indicating a dominance of pelagic filter-feeding and predatory invertebrates in the water-filled leaf axils. Both Neoponera villosa ants and Eriophora sp. spiders preferred rosettes at intermediate size bearing moderate amounts of detritus, indicating a benthic food web dominated by leaf shredders and gathering collectors. Owing to the animal diversity and biomass supported by rainforest epiphytes, our approach would deserve to be further tested on a range of epiphytes involved in tight interactions with invertebrates. In this context, surrogate species could serve both as indicators of functional diversity, and as early-warning indicators of network disassembly.  
  Address  
  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 1470-160x ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 841  
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Author (down) Caron, H.; Molino, J.-F.; Sabatier, D.; Léger, P.; Chaumeil, P.; Scotti-Saintagne, C.; Frigério, J.-M.; Scotti, I.; Franc, A.; Petit, R.J. pdf  url
doi  openurl
  Title Chloroplast DNA variation in a hyperdiverse tropical tree community Type Journal Article
  Year 2019 Publication Ecology and Evolution Abbreviated Journal Ecology and Evolution  
  Volume 9 Issue 8 Pages 4897-4905  
  Keywords chloroplast DNA; DNA barcoding; genetic diversity; hybridization; incomplete lineage sorting; introgression; species diversity; tropical trees  
  Abstract We investigate chloroplast DNA variation in a hyperdiverse community of tropical rainforest trees in French Guiana, focusing on patterns of intraspecific and interspecific variation. We test whether a species genetic diversity is higher when it has congeners in the community with which it can exchange genes and if shared haplotypes are more frequent in genetically diverse species, as expected in the presence of introgression. We sampled a total of 1,681 individual trees from 472 species corresponding to 198 genera and sequenced them at a noncoding chloroplast DNA fragment. Polymorphism was more frequent in species that have congeneric species in the study site than in those without congeners (30% vs. 12%). Moreover, more chloroplast haplotypes were shared with congeners in polymorphic species than in monomorphic ones (44% vs. 28%). Despite large heterogeneities caused by genus-specific behaviors in patterns of hybridization, these results suggest that the higher polymorphism in the presence of congeners is caused by local introgression rather than by incomplete lineage sorting. Our findings suggest that introgression has the potential to drive intraspecific genetic diversity in species-rich tropical forests.  
  Address INRA, UR629 Ecologie des Forêts Méditerranéennes, URFM, Avignon, France  
  Corporate Author Thesis  
  Publisher John Wiley and Sons Ltd Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 20457758 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 870  
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Author (down) Cantera, I.; Cilleros, K.; Valentini, A.; Cerdan, A.; Dejean, T.; Iribar, A.; Taberlet, P.; Vigouroux, R.; Brosse, S. pdf  url
doi  openurl
  Title Optimizing environmental DNA sampling effort for fish inventories in tropical streams and rivers Type Journal Article
  Year 2019 Publication Scientific Reports Abbreviated Journal Sci. Rep.  
  Volume 9 Issue Pages 3085  
  Keywords  
  Abstract Environmental DNA (eDNA) metabarcoding is a promising tool to estimate aquatic biodiversity. It is based on the capture of DNA from a water sample. The sampled water volume, a crucial aspect for efficient species detection, has been empirically variable (ranging from few centiliters to tens of liters). This results in a high variability of sampling effort across studies, making comparisons difficult and raising uncertainties about the completeness of eDNA inventories. Our aim was to determine the sampling effort (filtered water volume) needed to get optimal inventories of fish assemblages in species-rich tropical streams and rivers using eDNA. Ten DNA replicates were collected in six Guianese sites (3 streams and 3 rivers), resulting in sampling efforts ranging from 17 to 340 liters of water. We show that sampling 34 liters of water detected more than 64% of the expected fish fauna and permitted to distinguish the fauna between sites and between ecosystem types (stream versus rivers). Above 68 liters, the number of detected species per site increased slightly, with a detection rate higher than 71%. Increasing sampling effort up to 340 liters provided little additional information, testifying that filtering 34 to 68 liters is sufficient to inventory most of the fauna in highly diverse tropical aquatic ecosystems. © 2019, The Author(s).  
  Address HYDRECO, Laboratoire Environnement de Petit Saut, B.P 823, Kourou Cedex, F-97388, French Guiana  
  Corporate Author Thesis  
  Publisher Nature Publishing Group Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 20452322 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 865  
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Author (down) Bréchet, L.; Courtois, E.A.; Saint-Germain, T.; Janssens, I.A.; Asensio, D.; Ramirez-Rojas, I.; Soong, J.L.; Van Langenhove, L.; Verbruggen, E.; Stahl, C. pdf  url
doi  openurl
  Title Disentangling Drought and Nutrient Effects on Soil Carbon Dioxide and Methane Fluxes in a Tropical Forest Type Journal Article
  Year 2019 Publication Frontiers in Environmental Science Abbreviated Journal Front. Environ. Sci.  
  Volume 7 Issue 180 Pages  
  Keywords carbon dioxide; drought; fertilization; methane; nitrogen; phosphorus; soil GHG fluxes; tropical forest  
  Abstract Tropical soils are a major contributor to the balance of greenhouse gas (GHG) fluxes in the atmosphere. Models of tropical GHG fluxes predict that both the frequency of drought events and changes in atmospheric deposition of nitrogen (N) will significantly affect dynamics of soil carbon dioxide (CO2) and methane (CH4) production and consumption. In this study, we examined the combined effect of a reduction in precipitation and an increase in nutrient availability on soil CO2 and CH4 fluxes in a primary French Guiana tropical forest. Drought conditions were simulated by intercepting precipitation falling through the forest canopy with tarpaulin roofs. Nutrient availability was manipulated through application of granular N and/or phosphorus (P) fertilizer to the soil. Soil water content (SWC) below the roofs decreased rapidly and stayed at continuously low values until roof removal, which as a consequence roughly doubled the duration of the dry season. After roof removal, SWC slowly increased but remained lower than in the control soils even after 2.5 months of wet-season precipitation. We showed that drought-imposed reduction in SWC decreased the CO2 emissions (i.e., CO2 efflux), but strongly increased the CH4 emissions. N, P, and N × P (i.e., NP) additions all significantly increased CO2 emission but had no effect on CH4 fluxes. In treatments where both fertilization and drought were applied, the positive effect of N, P, and NP fertilization on CO2 efflux was reduced. After roof removal, soil CO2 efflux was more resilient in the control plots than in the fertilized plots while there was only a modest effect of roof removal on soil CH4 fluxes. Our results suggest that a combined increase in drought and nutrient availability in soil can locally increase the emissions of both CO2 and CH4 from tropical soils, for a long term.  
  Address Lawrence Berkeley National Laboratory, Climate and Ecosystem Science Division, Berkeley, CA, United States  
  Corporate Author Thesis  
  Publisher Frontiers Media S.A. Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2296665x (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 16 December 2019; Correspondence Address: Bréchet, L.; Centre of Excellence PLECO (Plant and Ecosystems), Department of Biology, University of AntwerpBelgium; email: laeti.brechet@gmail.com Approved no  
  Call Number EcoFoG @ webmaster @ Serial 899  
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Author (down) Bodin, S.C.; Scheel-Ybert, R.; Beauchene, J.; Molino, J.-F.; Bremond, L. url  doi
openurl 
  Title CharKey: An electronic identification key for wood charcoals of French Guiana Type Journal Article
  Year 2019 Publication IAWA Journal Abbreviated Journal Iawa J.  
  Volume 40 Issue 1 Pages 75-91  
  Keywords anthracology; Charcoal anatomy; computeraided identification; Note: Supplementary material can be accessed in the online edition of this journal via brill.com/iawa.; tropical flora; Xper 2  
  Abstract Tropical tree floras are highly diverse and many genera and species share similar anatomical patterns, making the identification of tropical wood charcoal very difficult. Appropriate tools to characterize charcoal anatomy are thus needed to facilitate and improve identification in such species-rich areas. This paper presents the first computer-aided identification key designed for charcoals from French Guiana, based on the wood anatomy of 507 species belonging to 274 genera and 71 families, which covers respectively 28%, 67% and 86% of the tree species, genera and families currently listed in this part of Amazonia. Species of the same genus are recorded together except those described under a synonym genus in Détienne et al. (1982) that were kept separately. As a result, the key contains 289 'items' and mostly aims to identify charcoals at the genus level. It records 26 anatomical features leading to 112 feature states, almost all of which are illustrated by SEM photographs of charcoal. The descriptions were mostly taken from Détienne et al.'s guidebook on tropical woods of French Guiana (1982) and follow the IAWA list of microscopic features for hardwood identification (Wheeler et al. 1989). Some adjustments were made to a few features and those that are unrelated to charcoal identification were excluded. The whole tool, named CharKey, contains the key itself and the associated database including photographs. It can be downloaded on Figshare at https://figshare.com/s/d7d40060b53d2ad60389 (doi: 10.6084/m9.figshare.6396005). CharKey is accessible using the free software Xper 2 , specifically conceived for taxonomic description and computer aided-identification.  
  Address Ecole Pratique des Hautes Etudes, PSL Research University, Paris, France  
  Corporate Author Thesis  
  Publisher Brill Academic Publishers Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 09281541 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number EcoFoG @ webmaster @ Serial 864  
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