| Records |
| Author |
Díaz, S.; Kattge, J.; Cornelissen, J.H.C.; Wright, I.J.; Lavorel, S.; Dray, S.; Reu, B.; Kleyer, M.; Wirth, C.; Colin Prentice, I.; Garnier, E.; Bönisch, G.; Westoby, M.; Poorter, H.; Reich, P.B.; Moles, A.T.; Dickie, J.; Gillison, A.N.; Zanne, A.E.; Chave, J.; Joseph Wright, S.; Sheremet’ev, S.N.; Jactel, H.; Baraloto, C.; Cerabolini, B.; Pierce, S.; Shipley, B.; Kirkup, D.; Casanoves, F.; Joswig, J.S.; Günther, A.; Falczuk, V.; Rüger, N.; Mahecha, M.D.; Gorné, L.D. |
| Title |
The global spectrum of plant form and function |
Type |
Journal Article |
| Year |
2016 |
Publication |
Nature |
Abbreviated Journal |
Nature |
| Volume |
529 |
Issue |
7585 |
Pages |
167-171 |
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Abstract  |
Earth is home to a remarkable diversity of plant forms and life histories, yet comparatively few essential trait combinations have proved evolutionarily viable in today’s terrestrial biosphere. By analysing worldwide variation in six major traits critical to growth, survival and reproduction within the largest sample of vascular plant species ever compiled, we found that occupancy of six-dimensional trait space is strongly concentrated, indicating coordination and trade-offs. Three-quarters of trait variation is captured in a two-dimensional global spectrum of plant form and function. One major dimension within this plane reflects the size of whole plants and their parts; the other represents the leaf economics spectrum, which balances leaf construction costs against growth potential. The global plant trait spectrum provides a backdrop for elucidating constraints on evolution, for functionally qualifying species and ecosystems, and for improving models that predict future vegetation based on continuous variation in plant form and function. |
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Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. |
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0028-0836 |
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EcoFoG @ webmaster @ |
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654 |
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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. |
| Title |
Trans-boundary infrastructure and land cover change: Highway paving and community-level deforestation in a tri-national frontier in the Amazon |
Type |
Journal Article |
| Year |
2013 |
Publication |
Land Use Policy |
Abbreviated Journal |
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| Volume |
34 |
Issue |
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Pages |
27-41 |
| Keywords |
Amazon; Brazil, Peru; Globalization; Infrastructure; Land |
| Abstract |
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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no |
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EcoFoG @ webmaster @ |
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475 |
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Trzcinski, M.K.; Srivastava, D.S.; Corbara, B.; Dezerald, O.; Leroy, C.; Carrias, J.-F.; Dejean, A.; Céréghino, R.; Rudolf, V. |
| Title |
The effects of food web structure on ecosystem function exceeds those of precipitation |
Type |
Journal Article |
| Year |
2016 |
Publication |
Journal of Animal Ecology |
Abbreviated Journal |
Journal of Animal Ecology |
| Volume |
85 |
Issue |
5 |
Pages |
1147-1160 |
| Keywords |
bromeliad; climate change; community interactions; drought; ecosystem function; French Guiana; invertebrates; micro-organisms; phytotelmata; precipitation |
| Abstract |
Ecosystems are being stressed by climate change, but few studies have tested food web responses to changes in precipitation patterns and the consequences to ecosystem function. Fewer still have considered whether results from one geographic region can be applied to other regions, given the degree of community change over large biogeographic gradients. We assembled, in one field site, three types of macroinvertebrate communities within water-filled bromeliads. Two represented food webs containing both a fast filter feeder–microbial and slow detritivore energy channels found in Costa Rica and Puerto Rico, and one represented the structurally simpler food webs in French Guiana, which only contained the fast filter feeder–microbial channel. We manipulated the amount and distribution of rain entering bromeliads and examined how food web structure mediated ecosystem responses to changes in the quantity and temporal distribution of precipitation. Food web structure affected the survival of functional groups in general and ecosystem functions such as decomposition and the production of fine particulate organic matter. Ecosystem processes were more affected by decreased precipitation than were the abundance of micro-organisms and metazoans. In our experiments, the sensitivity of the ecosystem to precipitation change was primarily revealed in the food web dominated by the single filter feeder–microbial channel because other top-down and bottom-up processes were weak or absent. Our results show stronger effects of food web structure than precipitation change per se on the functioning of bromeliad ecosystems. Consequently, we predict that ecosystem function in bromeliads throughout the Americas will be more sensitive to changes in the distribution of species, rather than to the direct effects caused by changes in precipitation. © 2016 The Authors. Journal of Animal Ecology © 2016 British Ecological Society |
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Boulevard de la Lironde, IRD, botAnique et bioinforMatique de l'Architecture des Plantes (UMR-IRD 123), TA A-51/PS2, Montpellier Cedex 5, France |
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Export Date: 1 September 2016 |
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no |
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EcoFoG @ webmaster @ |
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685 |
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Rivalland, C.; Madhkour, S.; Salvin, P.; Robert, F. |
| Title |
Electrochemical and microbial monitoring of multi-generational electroactive biofilms formed from mangrove sediment |
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Journal Article |
| Year |
2015 |
Publication |
Bioelectrochemistry |
Abbreviated Journal |
Bioelectrochemistry |
| Volume |
106 |
Issue |
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Pages |
125-132 |
| Keywords |
Dissimilarity; High-throughput sequencing; Mes; Microbial diversity; Syntrophism |
| Abstract |
Electroactive biofilms were formed from French Guiana mangrove sediments for the analysis of bacterial communities' composition. The electrochemical monitoring of three biofilm generations revealed that the bacterial selection occurring at the anode, supposedly leading microbial electrochemical systems (MESs) to be more efficient, was not the only parameter to be taken into account so as to get the best electrical performance (maximum current density). Indeed, first biofilm generations produced a stable current density reaching about 18A/m2 while second and third generations produced current densities of about 10A/m2. MES bacterial consortia were characterized thanks to molecular biology techniques: DGGE and MiSeq® sequencing (Illumina®). High-throughput sequencing data statistical analysis confirmed preliminary DGGE data analysis, showing strong similarities between electroactive biofilms of second and third generations, but also revealing both selection and stabilization of the biofilms. © 2015 Elsevier B.V. |
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Laboratoire des Matériaux et Molécules en Milieu Amazonien, UAG-UMR EcoFoG, 2091 route de Baduel, Campus TrouBiran, Cayenne, Guyane Française, France |
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| Notes |
Export Date: 11 September 2015 |
Approved |
no |
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EcoFoG @ webmaster @ |
Serial |
622 |
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| Author |
Orivel, J.; Klimes, P.; Novotny, V.; Leponce, M. |
| Title |
Resource use and food preferences in understory ant communities along a complete elevational gradient in Papua New Guinea |
Type |
Journal Article |
| Year |
2018 |
Publication |
Biotropica |
Abbreviated Journal |
Biotropica |
| Volume |
50 |
Issue |
4 |
Pages |
641-648 |
| Keywords |
altitudinal gradient; food resources; Formicidae; Mt Wilhelm; nutritional ecology |
| Abstract |
Elevational gradients provide an interesting opportunity for studying the effect of climatic drivers over short distances on the various facets of biodiversity. It is globally assumed that the decrease in species richness with increasing elevation follows mainly the decrease in ecosystem productivity, but studies on functional diversity still remain limited. Here, we investigated how resource use and food preferences by both individual ant species and communities foraging in the understory vary with elevation along a complete elevational gradient (200 to 3200 m asl). Five bait types reflecting some of the main ecosystem processes in which ants are involved were tested: mutualism (sucrose and melezitose), predation (live termites), and detritivory (crushed insects and chicken feces). The observed monotonic decrease in both species richness and occurrences with elevation increase was accompanied by changes in some of the tested ecosystem processes. Such variations can be explained by resource availability and/or resource limitation: Predation and bird feces removal decreased with increasing elevation possibly reflecting a decline in species able to use these resources, while insect detritivory and nectarivory were most probably driven by resource limitation (or absence of limitation), as their relative use did not change along the gradient. Consequently, resource attractiveness (i.e., food preferences at the species level) appears as an important factor in driving community structuring in ants together with the abiotic environmental conditions. |
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John Wiley & Sons, Ltd (10.1111) |
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0006-3606 |
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doi: 10.1111/btp.12539 |
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EcoFoG @ webmaster @ |
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893 |
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Leroy, C.; Gueroult, M.; Wahyuni, N.S.; Escoute, J.; Cereghino, R.; Sabatier, S.; Auclair, D. |
| Title |
Morphogenetic trends in the morphological, optical and biochemical features of phyllodes in Acacia mangium Willd (Mimosaceae) |
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Journal Article |
| Year |
2009 |
Publication |
Trees-Structure and Function |
Abbreviated Journal |
Trees-Struct. Funct. |
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23 |
Issue |
1 |
Pages |
37-49 |
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Chlorophyll; Phyllode morphology; Phyllode anatomy; Nitrogen; Optical properties; Plant architecture |
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Endogenous variations in the annual growth of trees suggest that similar trends would occur in phyllodes. In comparison to leaves, the characteristics of phyllodes are less well known, hence this study examines the effects of architectural position and age of tree on the phyllodes of Acacia mangium. Phyllodes were investigated on 1-, 2-, and 3-year-old trees from three axis positions within the crown. We focused on the morphological, optical and biochemical traits of the phyllodes. The increase in phyllode area and lamina thickness is more pronounced in the older trees. Leaf mass area (LMA), stomatal density, nitrogen and chlorophyll content increase with tree age. The values of these characteristics decrease from the main stem to the lower branches for the older trees. Phyllode light absorptance increased with tree age whereas reflectance was higher for the upper position compared to the lower position within the crown. Carotenoid content and chlorophyll a/b ratio were higher for the younger phyllodes of younger trees. Increasing tree size induced modifications in the phyllode characteristics which are influenced by both morphogenetic and light gradients within the crown. This study demonstrated pronounced changes in terms of morphological and functional indicators of photosynthetic capacity in relation to phyllode position within the crown and to tree age. These morphogenetic effects on the phyllode characteristics should be taken into account in studies on phenotypic plasticity. |
| Address |
[Sabatier, Sylvie] CIRAD, UMR AMAP BotAnique & BioinforMat Architecture, F-34398 Montpellier 5, France, Email: sylvie-annabel.sabatier@cirad.fr |
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SPRINGER |
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0931-1890 |
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ISI:000262538700005 |
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no |
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EcoFoG @ eric.marcon @ |
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206 |
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Marcon, E.; Herault, B. |
| Title |
entropart: An R package to measure and partition diversity |
Type |
Journal Article |
| Year |
2015 |
Publication |
Journal of Statistical Software |
Abbreviated Journal |
Journal of Statistical Software |
| Volume |
67 |
Issue |
8 |
Pages |
1-26 |
| Keywords |
Biodiversity; Entropy; Partitioning |
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entropart is a package for R designed to estimate diversity based on HCDT entropy or similarity-based entropy. It allows calculating species-neutral, phylogenetic and functional entropy and diversity, partitioning them and correcting them for estimation bias. © 2015, American Statistical Association. All rights reserved. |
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Cirad, Campus agronomique, BP 316, Kourou, French Guiana |
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Export Date: 22 October 2015 |
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no |
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EcoFoG @ webmaster @ |
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633 |
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Coutant, Opale ; Richard-Hansen, Cecile ; de Thoisy, Benoit ; Decotte, Jean-Baptiste ; Valentini, Alice ; Dejean, Tony ; Vigouroux, Régis ; Murienne, Jérôme ; Brosse, Sébastien |
| Title |
Amazonian mammal monitoring using aquatic environmental DNA |
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Journal Article |
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2021 |
Publication |
Molecular Ecology Resources |
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21 |
Issue |
6 |
Pages |
1875-1888 |
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Environmental DNA (eDNA) metabarcoding has emerged as one of the most efficient methods to assess aquatic species presence. While the method can in theory be used to investigate nonaquatic fauna, its development for inventorying semi-aquatic and terrestrial fauna is still at an early stage. Here we investigated the potential of aquatic eDNA metabarcoding for inventorying mammals in Neotropical environments, be they aquatic, semi-aquatic or terrestrial. We collected aquatic eDNA in 96 sites distributed along three Guianese watersheds and compared our inventories to expected species distributions and field observations derived from line transects located throughout French Guiana. Species occurrences and emblematic mammalian fauna richness patterns were consistent with the expected distribution of fauna and our results revealed that aquatic eDNA metabarcoding brings additional data to line transect samples for diurnal nonaquatic (terrestrial and arboreal) species. Aquatic eDNA also provided data on species not detectable in line transect surveys such as semi-aquatic, aquatic and nocturnal terrestrial and arboreal species. Although the application of eDNA to inventory mammals still needs some developments to optimize sampling efficiency, it can now be used as a complement to traditional surveys. |
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Wiley |
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EcoFoG @ webmaster @ |
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1015 |
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Cantera, I.; Cilleros, K.; Valentini, A.; Cerdan, A.; Dejean, T.; Iribar, A.; Taberlet, P.; Vigouroux, R.; Brosse, S. |
| Title |
Optimizing environmental DNA sampling effort for fish inventories in tropical streams and rivers |
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Journal Article |
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2019 |
Publication |
Scientific Reports |
Abbreviated Journal |
Sci. Rep. |
| Volume |
9 |
Issue |
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3085 |
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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). |
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HYDRECO, Laboratoire Environnement de Petit Saut, B.P 823, Kourou Cedex, F-97388, French Guiana |
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Nature Publishing Group |
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20452322 (Issn) |
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EcoFoG @ webmaster @ |
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865 |
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Michalet, S.; Rohr, J.; Warshan, D.; Bardon, C.; Roggy, J.-C.; Domenach, A.-M.; Czarnes, S.; Pommier, T.; Combourieu, B.; Guillaumaud, N.; Bellvert, F.; Comte, G.; Poly, F. |
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Phytochemical analysis of mature tree root exudates in situ and their role in shaping soil microbial communities in relation to tree N-acquisition strategy |
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Journal Article |
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2013 |
Publication |
Plant Physiology and Biochemistry |
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Plant Physiol. Biochem. |
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72 |
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169-177 |
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Chemical ecology; Denitrification; Eperua falcata; Metabolic profiling; Mycorrhizae; Plant-microbes interactions; Root exudates |
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Eperua falcata (Aublet), a late-successional species in tropical rainforest and one of the most abundant tree in French Guiana, has developed an original strategy concerning N-acquisition by largely preferring nitrate, rather than ammonium (H. Schimann, S. Ponton, S. Hättenschwiler, B. Ferry, R. Lensi, A.M. Domenach, J.C. Roggy, Differing nitrogen use strategies of two tropical rainforest tree species in French Guiana: evidence from 15N natural abundance and microbial activities, Soil Biol. Biochem. 40 (2008) 487-494). Given the preference of this species for nitrate, we hypothesized that root exudates would promote nitrate availability by (a) enhancing nitrate production by stimulating ammonium oxidation or (b) minimizing nitrate losses by inhibiting denitrification.Root exudates were collected in situ in monospecific planted plots. The phytochemical analysis of these exudates and of several of their corresponding root extracts was achieved using UHPLC/DAD/ESI-QTOF and allowed the identification of diverse secondary metabolites belonging to the flavonoid family.Our results show that (i) the distinct exudation patterns observed are related to distinct root morphologies, and this was associated with a shift in the root flavonoid content, (ii) a root extract representative of the diverse compounds detected in roots showed a significant and selective metabolic inhibition of isolated denitrifiers invitro, and (iii) in soil plots the abundance of nirK-type denitrifiers was negatively affected in rhizosphere soil compared to bulk. Altogether this led us to formulate hypothesis concerning the ecological role of the identified compounds in relation to N-acquisition strategy of this species. © 2013 Elsevier Masson SAS. |
| Address |
SOLICAZ, c/o Guyane Technopole 16 bis rue du 14 Juillet, 97300 Cayenne, French Guiana |
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09819428 (Issn) |
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Export Date: 15 November 2013; Source: Scopus; Coden: Ppbie; doi: 10.1016/j.plaphy.2013.05.003; Language of Original Document: English; Correspondence Address: Michalet, S.; Université Lyon1, CNRS, UMR5557, INRA, USC1364, Ecologie Microbienne, Centre d'Etude des Substances Naturelles, Pavillon Nétien, ISPB, 8 Avenue Rockefeller, 69373 Lyon cedex, France; email: sergemichalet@yahoo.fr |
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EcoFoG @ webmaster @ |
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509 |
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