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Author Marcon, E.; Traissac, S.; Puech, F.; Lang, G.
Title Tools to characterize point patterns: dbmss for R Type Journal Article
Year 2015 Publication Journal of Statistical Software Abbreviated Journal Journal of Statistical Software
Volume 67 Issue Codesnippet3 Pages 1-15
Keywords Point patterns; R; Spatial structure
Abstract The dbmss package for R provides an easy-to-use toolbox to characterize the spatial structure of point patterns. Our contribution presents the state of the art of distance-based methods employed in economic geography and which are also used in ecology. Topographic functions such as Ripley’s K, absolute functions such as Duranton and Overman’s Kd and relative functions such as Marcon and Puech’s M are implemented. Their confidence envelopes (including global ones) and tests against counterfactuals are included in the package. © 2015, American Statistical Association. All rights reserved.
Address AgroParisTech, INRA, UMR 518 Math. Info. Appli., 16 rue Claude Bernard, Paris, France
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Notes Export Date: 22 October 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 635
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Author Talaga, S.; Dejean, A.; Carinci, R.; Gaborit, P.; Dusfour, I.; Girod, R.
Title Updated Checklist of the Mosquitoes (Diptera: Culicidae) of French Guiana Type Journal Article
Year 2015 Publication Journal of Medical Entomology Abbreviated Journal Journal of Medical Entomology
Volume 52 Issue 5 Pages 770-782
Keywords culicid; Neotropics; South America; species checklist; vector
Abstract The incredible mosquito species diversity in the Neotropics can provoke major confusion during vector control programs when precise identification is needed. This is especially true in French Guiana where studies on mosquito diversity practically ceased 35 yr ago. In order to fill this gap, we propose here an updated and comprehensive checklist of the mosquitoes of French Guiana, reflecting the latest changes in classification and geographical distribution and the recognition of current or erroneous synonymies. This work was undertaken in order to help ongoing and future research on mosquitoes in a broad range of disciplines such as ecology, biogeography, and medical entomology. Thirty-two valid species cited in older lists have been removed, and 24 species have been added including 12 species (comprising two new genera and three new subgenera) reported from French Guiana for the first time. New records are from collections conducted on various phytotelmata in French Guiana and include the following species: Onirion sp. cf Harbach and Peyton (2000), Sabethes (Peytonulus) hadrognathus Harbach, Sabethes (Peytonulus) paradoxus Harbach, Sabethes (Peytonulus) soperi Lane and Cerqueira, Sabethes (Sabethinus) idiogenes Harbach, Sabethes (Sabethes) quasicyaneus Peryassú , Runchomyia (Ctenogoeldia) magna (Theobald), Wyeomyia (Caenomyiella) sp. cf Harbach and Peyton (1990), Wyeomyia (Dendromyia) ypsipola Dyar, Wyeomyia (Hystatomyia) lamellata (Bonne-Wepster and Bonne), Wyeomyia (Miamyia) oblita (Lutz), and Toxorhynchites (Lynchiella) guadeloupensis (Dyar and Knab). At this time, the mosquitoes of French Guiana are represented by 235 species distributed across 22 genera, nine tribes, and two subfamilies.
Address UnitÉ d'Entomologie Médicale, Institut Pasteur de la Guyane, 23 Avenue Pasteur, Cayenne Cedex, France
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Notes Export Date: 22 October 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 636
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Author Siefert, A.; Violle, C.; Chalmandrier, L.; Albert, C.H.; Taudiere, A.; Fajardo, A.; Aarssen, L.W.; Baraloto, C.; Carlucci, M.B.; Cianciaruso, M.V.; de L. Dantas, V.; de Bello, F.; Duarte, L.D.S.; Fonseca, C.R.; Freschet, G.T.; Gaucherand, S.; Gross, N.; Hikosaka, K.; Jackson, B.; Jung, V.; Kamiyama, C.; Katabuchi, M.; Kembel, S.W.; Kichenin, E.; Kraft, N.J.B.; Lagerström, A.; Bagousse-Pinguet, Y.L.; Li, Y.; Mason, N.; Messier, J.; Nakashizuka, T.; Overton, J.M.; Peltzer, D.A.; Pérez-Ramos, I.M.; Pillar, V.D.; Prentice, H.C.; Richardson, S.; Sasaki, T.; Schamp, B.S.; Schöb, C.; Shipley, B.; Sundqvist, M.; Sykes, M.T.; Vandewalle, M.; Wardle, D.A.
Title A global meta-analysis of the relative extent of intraspecific trait variation in plant communities Type Journal Article
Year 2015 Publication Ecology Letters Abbreviated Journal Ecology Letters
Volume 18 Issue 12 Pages 1406-1419
Keywords Community ecology; Functional diversity; Interspecific variation; Intraspecific variability; Leaf trait; Plant functional trait; Trait-based ecology
Abstract Recent studies have shown that accounting for intraspecific trait variation (ITV) may better address major questions in community ecology. However, a general picture of the relative extent of ITV compared to interspecific trait variation in plant communities is still missing. Here, we conducted a meta-analysis of the relative extent of ITV within and among plant communities worldwide, using a data set encompassing 629 communities (plots) and 36 functional traits. Overall, ITV accounted for 25% of the total trait variation within communities and 32% of the total trait variation among communities on average. The relative extent of ITV tended to be greater for whole-plant (e.g. plant height) vs. organ-level traits and for leaf chemical (e.g. leaf N and P concentration) vs. leaf morphological (e.g. leaf area and thickness) traits. The relative amount of ITV decreased with increasing species richness and spatial extent, but did not vary with plant growth form or climate. These results highlight global patterns in the relative importance of ITV in plant communities, providing practical guidelines for when researchers should include ITV in trait-based community and ecosystem studies. © 2015 John Wiley & Sons Ltd/CNRS.
Address Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, Lund, Sweden
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Notes Export Date: 16 November 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 637
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Author Richard-Hansen, C.; Jaouen, G.; Denis, T.; Brunaux, O.; Marcon, E.; Guitet, S.
Title Landscape patterns influence communities of medium-to large-bodied vertebrates in undisturbed terra firme forests of French Guiana Type Journal Article
Year 2015 Publication Journal of Tropical Ecology Abbreviated Journal Journal of Tropical Ecology
Volume 31 Issue 5 Pages 423-436
Keywords Animal communities; diversity; environmental heterogeneity; French Guiana; landscape ecology; species-habitat association
Abstract Whereas broad-scale Amazonian forest types have been shown to influence the structure of the communities of medium-to large-bodied vertebrates, their natural heterogeneity at smaller scale or within the terra firme forests remains poorly described and understood. Diversity indices of such communities and the relative abundance of the 21 most commonly observed species were compared from standardized line-transect data across 25 study sites distributed in undisturbed forests in French Guiana. We first assessed the relevance of a forest typology based on geomorphological landscapes to explain the observed heterogeneity. As previously found for tree beta-diversity patterns, this new typology proved to be a non-negligible factor underlying the beta diversity of the communities of medium-to large bodied vertebrates in French Guianan terra firme forests. Although the species studied are almost ubiquitous across the region, they exhibited habitat preferences through significant variation in abundance and in their association index with the different landscape types. As terra firme forests represent more than 90% of the Amazon basin, characterizing their heterogeneity-including faunal communities-is a major challenge in neotropical forest ecology. © 2015 Cambridge University Press.
Address ONCFS, EcoFoG, Kourou Cedex, France
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Notes Export Date: 16 November 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 638
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Author Guitet, S.; Herault, B.; Molto, Q.; Brunaux, O.; Couteron, P.
Title Spatial structure of above-ground biomass limits accuracy of carbon mapping in rainforest but large scale forest inventories can help to overcome Type Journal Article
Year 2015 Publication PLoS ONE Abbreviated Journal PLoS ONE
Volume 10 Issue 9 Pages e0138456
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Abstract Precise mapping of above-ground biomass (AGB) is a major challenge for the success of REDD+ processes in tropical rainforest. The usual mapping methods are based on two hypotheses: a large and long-ranged spatial autocorrelation and a strong environment influence at the regional scale. However, there are no studies of the spatial structure of AGB at the landscapes scale to support these assumptions.We studied spatial variation in AGB at various scales using two large forest inventories conducted in French Guiana. The dataset comprised 2507 plots (0.4 to 0.5 ha) of undisturbed rainforest distributed over the whole region. After checking the uncertainties of estimates obtained from these data, we used half of the dataset to develop explicit predictive models including spatial and environmental effects and tested the accuracy of the resulting maps according to their resolution using the rest of the data. Forest inventories provided accurate AGB estimates at the plot scale, for a mean of 325 Mg.ha-1. They revealed high local variability combined with a weak autocorrelation up to distances of no more than10 km. Environmental variables accounted for a minor part of spatial variation. Accuracy of the best model including spatial effects was 90 Mg.ha-1 at plot scale but coarse graining up to 2-km resolution allowed mapping AGB with accuracy lower than 50 Mg.ha-1. Whatever the resolution, no agreement was found with available pan-tropical reference maps at all resolutions.We concluded that the combined weak autocorrelation and weak environmental effect limit AGB maps accuracy in rainforest, and that a trade-off has to be found between spatial resolution and effective accuracy until adequate “wall-to-wall” remote sensing signals provide reliable AGB predictions. Waiting for this, using large forest inventories with low sampling rate (<0.5%) may be an efficient way to increase the global coverage of AGB maps with acceptable accuracy at kilometric resolution. Copyright: © 2015 Guitet et al.
Address Institut de Recherche Pour le Développement (IRD), UMR Amap, Montpellier, France
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Notes Export Date: 25 November 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 639
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Author Talaga, S.; Murienne, J.; Dejean, A.; Leroy, C.
Title Online database for mosquito (Diptera, Culicidae) occurrence records in French guiana Type Journal Article
Year 2015 Publication ZooKeys Abbreviated Journal ZooKeys
Volume 2015 Issue 532 Pages 107-115
Keywords Diversity; French guiana; Mosquitoes; Neotropics; Occurrence
Abstract A database providing information on mosquito specimens (Arthropoda: Diptera: Culicidae) collected in French Guiana is presented. Field collections were initiated in 2013 under the auspices of the CEnter for the study of Biodiversity in Amazonia (CEBA: http://www.labexceba.fr/en/). This study is part of an ongoing process aiming to understand the distribution of mosquitoes, including vector species, across French Guiana. Occurrences are recorded after each collecting trip in a database managed by the laboratory Evolution et Diversité Biologique (EDB), Toulouse, France. The dataset is updated monthly and is available online. Voucher specimens and their associated DNA are stored at the laboratory Ecologie des Forêts de Guyane (Ecofog), Kourou, French Guiana. The latest version of the dataset is accessible through EDB’s Integrated Publication Toolkit at http://130.120.204.55:8080/ipt/resource.do?r=mosquitoesof french_guiana or through the Global Biodiversity Information Facility data portal at http://www.gbif.org/ dataset/5a8aa2ad-261c-4f61-a98e-26dd752fe1c5 It can also be viewed through the Guyanensis platform at http://guyanensis.ups-tlse.fr © Stanislas Talaga et al.
Address IRD, Laboratoire de botAnique et Modélisation de l’Architecture des Plantes et des végétations (AMAP; UMR 123), Boulevard de la Lironde, TA A-51/PS2, Montpellier, France
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Notes Export Date: 25 November 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 640
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Author Vedel, V.; Cerdan, A.; Martinez, Q.; Baraloto, C.; Petitclerc, F.; Orivel, J.; Fortunel, C.
Title Day-time vs. Night-time sampling does not affect estimates of spider diversity across a land use gradient in the Neotropics Type Journal Article
Year 2015 Publication Journal of Arachnology Abbreviated Journal Journal of Arachnology
Volume 43 Issue 3 Pages 413-416
Keywords Araneae; community; day; night; sampling protocol
Abstract To obtain a reliable description of spider communities, robust sampling protocols are crucial. However, it remains unclear if descriptions of spider communities in tropical habitats require both day and night sampling. Here we tested whether sampling both day and night in high and low vegetation strata would lead to better diversity estimates of spider communities than sampling at only one period of the day. We determined spider taxonomic diversity in a network of 12 plots in French Guiana along a vegetation gradient. We found high alpha diversity of spiders as expected for a tropical area at every site. We showed strong differences in spider alpha and beta diversity between high and low vegetation strata, while they were similar between day and night sampling. Our results suggest that collecting spiders at only one period is sufficient to describe the diversity of spider communities across land use types in the neotropics. © The American Arachnological Society.
Address Department of Biology, University of Maryland, College Park, MD, United States
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Notes Export Date: 10 December 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 641
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Author Scotti, I.; Montaigne, W.; Cseke, K.; Traissac, S.
Title Life after disturbance (II): the intermediate disturbance hypothesis explains genetic variation in forest gaps dominated by Virola michelii Heckel (Myristicaceae) Type Journal Article
Year 2015 Publication Annals of Forest Science Abbreviated Journal Annals of Forest Science
Volume 72 Issue 8 Pages 1035-1042
Keywords Amazon; Bayesian clustering; Demogenetics; Guiana shield; Parentage analysis; Regeneration; Spatial genetic structure; Tropical rainforest
Abstract Key message: Genetic diversity appears to be unaffected by disturbance in a stand of the light-demanding Neotropical treeV. michelii. Although spatial genetic structure is modified in post-disturbance cohorts, mixing of seeds from different mother trees in canopy gaps appears to efficiently maintain genetic admixture. Context: The interplay between genetic and demographic processes has major consequences on population viability. Population size affects demographic trends, while genetic diversity insures viability by reducing risks of inbreeding depression and by maintaining adaptive potential. Yet, the consequences of increases in census size (as opposed to effective size) on genetic diversity of forest populations are poorly known. Aims: We have studied the structure of genetic diversity in populations of saplings of the light-responsive tree, Virola michelii (Myristicaceae, the nutmeg family), in two plots having undergone different levels of canopy-gap opening disturbance. This allowed us to test the “intermediate disturbance” hypothesis, which generally applies to species diversity, at the intra-specific scale. Methods: Levels and distribution of genetic diversity were compared between plots and between life stages. Sapling parentage was analysed to infer each adult tree’s contribution to regeneration. Results: Genetic diversity was higher, and spatial genetic structure was stronger in the post-disturbance than in the control seedling population. Parentage analysis suggested that a limited number of parents contributed to most of the regeneration, but that efficient mixing of their progeny may have enhanced the diversity of saplings occupying canopy gaps. Conclusion: A mixture of demo-genetic processes may contribute to maintain genetic diversity in spite of, or possibly due to, ecosystem disturbance in V. michelii. © 2015, INRA and Springer-Verlag France.
Address Solicaz, Guyane Technopôle, 16 bis Rue du 14 Juillet, Cayenne, French Guiana
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Notes Export Date: 14 December 2015 Approved no
Call Number EcoFoG @ webmaster @ Serial 642
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Author Touchard, A.;Dejean, A.;Orivel, J.
Title Intraspecific variations in the venom peptidome of the ant Odontomachus haematodus (Formicidae: Ponerinae) from French Guiana Type Journal Article
Year 2015 Publication Journal of Hymenoptera Research Abbreviated Journal Journal of Hymenoptera Research
Volume 47 Issue Pages 87-101
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Abstract Ant venoms are complex cocktails of toxins employed to subdue prey and to protect the colony from predators and microbial pathogens. Although the extent of ant venom peptide diversity remains largely unexplored, previous studies have revealed the presence of numerous bioactive peptides in most stinging ant venoms. We investigated the venom peptidome of the ponerine ant Odontomachus haematodus using LC-MS analysis and then verified whether the division of labor in the colonies and their geographical location are correlated with differences in venom composition. Our results reveal that O. haematodus venom is comprised of 105 small linear peptides. The venom composition does not vary between the different castes (i.e., nurses, foragers and queens), but an intraspecific variation in peptide content was observed, particularly when the colonies are separated by large distances. Geographical variation appears to increase the venom peptide repertoire of this ant species, demonstrating its intraspecific venom plasticity.
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Author Basset, Y.; Cizek, L.; Cuénoud, P.; Didham, R.K.; Novotny, V.; Ødegaard, F.; Roslin, T.; Tishechkin, A.K.; Schmidl, J.; Winchester, N.N.; Roubik, D.W.; Aberlenc, H.-P.; Bail, J.; Barrios, H.; Bridle, J.R.; Castaño-Meneses, G.; Corbara, B.; Curletti, G.; Duarte da Rocha, W.; De Bakker, D.; Delabie, J.H.C.; Dejean, A.; Fagan, L.L.; Floren, A.; Kitching, R.L.; Medianero, E.; Gama de Oliveira, E.; Orivel, J.; Pollet, M.; Rapp, M.; Ribeiro, S.P.; Roisin, Y.; Schmidt, J.B.; Sørensen, L.; Lewinsohn, T.M.; Leponce, M.
Title Arthropod Distribution in a Tropical Rainforest: Tackling a Four Dimensional Puzzle Type Journal Article
Year 2015 Publication PLoS ONE Abbreviated Journal PLoS ONE
Volume 10 Issue 12 Pages e0144110
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Abstract Quantifying the spatio-temporal distribution of arthropods in tropical rainforests represents a first step towards scrutinizing the global distribution of biodiversity on Earth. To date most studies have focused on narrow taxonomic groups or lack a design that allows partitioning of the components of diversity. Here, we consider an exceptionally large dataset (113,952 individuals representing 5,858 species), obtained from the San Lorenzo forest in Panama, where the phylogenetic breadth of arthropod taxa was surveyed using 14 protocols targeting the soil, litter, understory, lower and upper canopy habitats, replicated across seasons in 2003 and 2004. This dataset is used to explore the relative influence of horizontal, vertical and seasonal drivers of arthropod distribution in this forest. We considered arthropod abundance, observed and estimated species richness, additive decomposition of species richness, multiplicative partitioning of species diversity, variation in species composition, species turnover and guild structure as components of diversity. At the scale of our study (2km of distance, 40m in height and 400 days), the effects related to the vertical and seasonal dimensions were most important. Most adult arthropods were collected from the soil/litter or the upper canopy and species richness was highest in the canopy. We compared the distribution of arthropods and trees within our study system. Effects related to the seasonal dimension were stronger for arthropods than for trees. We conclude that: (1) models of beta diversity developed for tropical trees are unlikely to be applicable to tropical arthropods; (2) it is imperative that estimates of global biodiversity derived from mass collecting of arthropods in tropical rainforests embrace the strong vertical and seasonal partitioning observed here; and (3) given the high species turnover observed between seasons, global climate change may have severe consequences for rainforest arthropods.
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