| Records |
| Author |
Prunier, J.; Maurice, L.; Perez, E.; Gigault, J.; Pierson Wickmann, A.-C.; Davranche, M.; Halle, A.T. |
| Title |
Trace metals in polyethylene debris from the North Atlantic subtropical gyre |
Type |
Journal Article |
| Year |
2019 |
Publication |
Environmental Pollution |
Abbreviated Journal |
Environ. Pollut. |
| Volume |
245 |
Issue |
|
Pages |
371-379 |
| Keywords |
metals'accumulation; Microplastic; Plastic debris; Polyethylene; Polymer |
| Abstract |
Plastic pollution in the marine environment poses threats to wildlife and habitats through varied mechanisms, among which are the transport and transfer to the food web of hazardous substances. Still, very little is known about the metal content of plastic debris and about sorption/desorption processes, especially with respect to weathering. In this study, plastic debris collected from the North Atlantic subtropical gyre was analyzed for trace metals; as a comparison, new packaging materials were also analyzed. Both the new items and plastic debris showed very scattered concentrations. The new items contained significant amounts of trace metals introduced as additives, but globally, metal concentrations were higher in the plastic debris. The results provide evidence that enhanced metal concentrations increase with the plastic state of oxidation for some elements, such as As, Ti, Ni, and Cd. Transmission electron microscopy showed the presence of mineral particles on the surface of the plastic debris. This work demonstrates that marine plastic debris carries complex mixtures of heavy metals. Such materials not only behave as a source of metals resulting from intrinsic plastic additives but also are able to concentrate metals from ocean water as mineral nanoparticles or adsorbed species. Plastic debris collected from the North Atlantic subtropical gyre was analyzed for trace metals. Marine plastic debris carry complex mixtures of heavy metals but it is evidence that plastic oxidation favors their adsorption. |
| Address |
Univ Rennes, Geosciences, UMR CNRS 6118, bat 15, Campus de Beaulieu, Rennes Cedex, 35042, France |
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Elsevier Ltd |
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02697491 (Issn) |
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Export Date: 3 December 2018; Coden: Enpoe; Correspondence Address: Halle, A.T.; Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Toulouse III – Paul Sabatier, 118 route de Narbonne, Cedex 09, France; email: ter-halle@chimie.ups-tlse.fr; References: Al-Sid-Cheikh, M., Pedrot, M., Dia, A., Guenet, H., Vantelon, D., Davranche, M., Gruau, G., Delhaye, T., Interactions between natural organic matter, sulfur, arsenic and iron oxides in re-oxidation compounds within riparian wetlands: NanoSIMS and X-ray adsorption spectroscopy evidences (2015) Sci. Total Environ., 515, pp. 118-128; Anderson, A., Andrady, A., Hidalgo-Ruz, V., Kershaw, P.J., Sources, Fate and Effects of Microplastics in the Marine Environment: a Global Assessment; GESAMP Joint Group of Expertts on the Scientific Aspects of Marine Environmental Protection (2015); Ashton, K., Holmes, L., Turner, A., Association of metals with plastic production pellets in the marine environment (2010) Mar. Pollut. 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Geochem., 23, pp. 3372-3383; Gall, S.C., Thompson, R.C., The impact of debris on marine life (2015) Mar. Pollut. Bull., 92, pp. 170-179; Goldstein, M.C., Carson, H.S., Eriksen, M., Relationship of diversity and habitat area in North Pacific plastic-associated rafting communities (2014) Mar. Biol., 161, pp. 1441-1453; Hansen, E., Nilsson, N.H., Lithner, D., Lassen, C., Hazardous Substances in Plastic Materials, COWI and the Danish Technological Institute on Behalf of Thr Norwegian Climate and Pollution Agency. In Oslo (2010), p 150 pp; (2013) Hazardous Substances in Plastic Materials, , COWI Danish Technological Institute; Hirai, H., Takada, H., Ogata, Y., Yamashita, R., Mizukawa, K., Saha, M., Kwan, C., Ward, M.W., Organic micropollutants in marine plastics debris from the open ocean and remote and urban beaches (2011) Mar. Pollut. Bull., 62, pp. 1683-1692; Holmes, L.A., Turner, A., Thompson, R.C., Adsorption of trace metals to plastic resin pellets in the marine environment (2012) Environ. Pollut., 160, pp. 42-48; Holmes, L.A., Turner, A., Thompson, R.C., Interactions between trace metals and plastic production pellets under estuarine conditions (2014) Mar. Chem., 167, pp. 25-32; Imhof, H.K., Laforsch, C., Wiesheu, A.C., Schmid, J., Anger, P.M., Niessner, R., Ivleva, N.P., Pigments and plastic in limnetic ecosystems: a qualitative and quantitative study on microparticles of different size classes (2016) Water Res., 98, pp. 64-74; Jiao, W.T., Chen, W.P., Chang, A.C., Page, A.L., Environmental risks of trace elements associated with long-term phosphate fertilizers applications: a review (2012) Environ. Pollut., 168, pp. 44-53; Lavers, J.L., Bond, A.L., Ingested plastic as a route for trace metals in laysan albatross (phoebastria immutabilis) and bonin petrel (pterodroma hypoleuca) from midway atoll (2016) Mar. Pollut. Bull., 110, pp. 493-500; Law, K.L., Moret-Ferguson, S.E., Goodwin, D.S., Zettler, E.R., De Force, E., Kukulka, T., Proskurowski, G., Distribution of surface plastic debris in the eastern pacific ocean from an 11-year data set (2014) Environ. Sci. Technol., 48, pp. 4732-4738; Lazzeria, A., Zebarjadb, S.M., Parcellac, M., Cavalierd, K., Rosam, R., Filler toughening of plastics. Part 1-The effect of surface interactions on physico-mechanical properties and rheological behaviour of ultrafine CaCO3/HDPE nanocomposites (2005) Polymer, 46, pp. 827-844; Lithner, D., Larsson, A., Dave, G., Environmental and health hazard ranking and assessment of plastic polymers based on chemical composition (2011) Sci. Total Environ., 409, pp. 3309-3324; Marier, C., Calafut, C., Polypropylene: the Definitive User's Guide and Databook. Norwich NY (1998); Massos, A., Turner, A., Cadmium, lead and bromine in beached microplastics (2017) Environ. 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Pollut., 178, pp. 483-492; Zettler, E.R., Mincer, T.J., Amaral-Zettler, L.A., Life in the “plastisphere”: microbial communities on plastic marine debris (2013) Environ. Sci. Technol., 47, pp. 7137-7146 |
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EcoFoG @ webmaster @ |
Serial |
840 |
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| Author |
Malé, P.-J.G.; Leroy, C.; Dejean, A.; Quilichini, A.; Orivel, J. |
| Title |
An ant symbiont directly and indirectly limits its host plant's reproductive success |
Type |
Journal Article |
| Year |
2012 |
Publication |
Evolutionary Ecology |
Abbreviated Journal |
Evol. Ecol. |
| Volume |
26 |
Issue |
1 |
Pages |
55-63 |
| Keywords |
Cheater; Evolutionary conflict; Mutualism breakdown; Myrmecophyte; Pollination |
| Abstract |
In theory, mutualisms are intrinsically unstable, and the search for the maximum profit at the minimum cost should lead every mutualist to become a parasite. From an empirical point of view, mutualisms are ubiquitous and of major importance to ecosystems, suggesting the existence of mechanisms that enhance the maintenance of such relationships. We focused on the obligatory myrmecophytic association between the Neotropical plant Hirtella physophora (Chrysobalanaceae) and the ant Allomerus decemarticulatus (Myrmicinae). The plant shelters the ants in leaf pouches in exchange for protection from phytophagous insects. We experimentally demonstrated that the ants partially castrate their host plant by destroying almost two-thirds of its floral buds. The ants also impede pollination through their presence and interactions with pollinators. These results reveal that ant activity negatively affects the plant's reproduction both directly and indirectly. This dual negative effect does not result in the complete castration of the plant. We also highlight major limitations to plant reproduction due to the spontaneous abscission of flowers and to the limited quantity and/or poor quality of the pollen. These limitations must not be overlooked since they can alter the outcome of the association of H. physophora with its ant partner. We therefore conclude that the evolutionary fate of the relationship depends on both ant castration intensity and obstacles to plant fertilization not related to the presence of ants. © 2011 Springer Science+Business Media B.V. |
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Jardin Botanique Henri Gaussen, 39 Allées Jules Guesde, 31062 Toulouse, France |
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02697653 (Issn) |
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Export Date: 2 January 2012; Source: Scopus; Coden: Evece; doi: 10.1007/s10682-011-9485-7; Language of Original Document: English; Correspondence Address: Malé, P.-J. G.; CNRS, EDB (Laboratoire Evolution et Diversité Biologique), UMR 5174, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France; email: pjmale@cict.fr |
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no |
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EcoFoG @ webmaster @ |
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377 |
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Dejean, A.; Petitclerc, F.; Azémar, F. |
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Seasonality influences ant-mediated nutrient acquisition (myrmecotrophy) by a Neotropical myrmecophyte |
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Journal Article |
| Year |
2020 |
Publication |
Evolutionary Ecology |
Abbreviated Journal |
Evol. Ecol. |
| Volume |
34 |
Issue |
4 |
Pages |
645-657 |
| Keywords |
Ant-plant relationships; Mutualism; Myrmecophyte; Myrmecotrophy; Phenology; Stable isotopes; ant; herb; host plant; life cycle; myrmecochory; myrmecophyte; Neotropical Region; phenology; seasonality; stable isotope; understory; Gentianaceae; Tachia; Tachia guianensis |
| Abstract |
Tachia guianensis (Gentianaceae), a Neotropical understory myrmecophyte, shelters ant colonies in its hollow trunks and branches (domatia). In turn, it is protected from defoliators and obtains nutrients from ant-produced wastes (myrmecotrophy). Aiming to verify if seasonality influences nitrogen assimilation via ant wastes using the stable isotope nitrogen-15, we first studied Tachia’s phenology and its seasonal leaf production, and then the life cycle of its two more frequent guest ant species. We found that leaf production was much higher during the rainy than the dry season. Mature guest ant colonies produced sexuals regardless of the season and the net weight of the waste piles inside the domatia did not vary between seasons, so that the availability of nutrients to their host plant is steady year-long. By providing the two most frequent mutualistic guest ant species with food enriched with nitrogen-15, we showed that Tachia individuals assimilate more nitrogen from ant wastes during the rainy season, when the plant is physiologically active, compared to the dry season. Thus, one can deduce that the increase in nitrogen assimilation during the rainy season is determined by the increase in Tachia’s physiological activity during that season. Information gathered through a bibliographic compilation confirms that none of the 15 ant species known to be associated with myrmecophytes for which the life cycle was studied is characterized by seasonal reproduction (which would result in fluctuating waste production). The same is true for 49.7% of 167 tropical ant species (seasonal production for the remaining species). We concluded that, in contrast to the non-seasonal ant colony reproductive cycle, Tachia’s phenology determines the myrmecotrophic assimilation rate. © 2020, Springer Nature Switzerland AG. |
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CNRS, UMR EcoFoG, AgroParisTech, CIRAD, INRAE, Université des Antilles, Université de Guyane, Kourou, 97310, France |
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Springer |
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02697653 (Issn) |
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no |
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EcoFoG @ webmaster @ |
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956 |
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Fortunel, C.; Fine, P.V.A.; Baraloto, C. |
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Leaf, stem and root tissue strategies across 758 Neotropical tree species |
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Journal Article |
| Year |
2012 |
Publication |
Functional Ecology |
Abbreviated Journal |
Funct. Ecol. |
| Volume |
26 |
Issue |
5 |
Pages |
1153-1161 |
| Keywords |
French Guiana; Functional trade-offs; Leaf economics; Peru; Plant traits; Tropical forest; Wood economics |
| Abstract |
1. Trade-offs among functional traits reveal major plant strategies that can give insight into species distributions and ecosystem processes. However, current identification of plant strategies lacks the integration of root structural traits together with leaf and stem traits. 2. We examined correlations among 14 traits representing leaf, stem and woody root tissues. Traits were measured on 1084 individuals representing 758 Neotropical tree species, across 13 sites representative of the environmental variation encompassed by three widespread habitats (seasonally flooded, clay terra firme and white-sand forests) at opposite ends of Amazonia (French Guiana and Peru). 3. Woody root traits were closely aligned with stem traits, but not with leaf traits. Altogether leaf, stem and woody root traits delineated two orthogonal axes of functional trade-offs: a first axis defined by leaf traits, corresponding to a 'leaf economics spectrum', and a second axis defined by covarying stem and woody root traits, corresponding to a 'wood economics spectrum'. These axes remained consistent when accounting for species evolutionary history with phylogenetically independent contrasts. 4. Despite the strong species turnover across sites, the covariation among root and stem structural traits as well as their orthogonality to leaf traits were strongly consistent across habitats and regions. 5. We conclude that root structural traits mirrored stem traits rather than leaf traits in Neotropical trees. Leaf and wood traits define an integrated whole-plant strategy in lowland South American forests that may contribute to a more complete understanding of plant responses to global changes in both correlative and modelling approaches. We suggest further meta-analyses in expanded environmental and geographic zones to determine the generality of this pattern. © 2012 The Authors. Functional Ecology © 2012 British Ecological Society. |
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Department of Biology, University of Florida, Gainesville, FL, 32611, United States |
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02698463 (Issn) |
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Export Date: 10 October 2012; Source: Scopus; Coden: Fecoe; doi: 10.1111/j.1365-2435.2012.02020.x; Language of Original Document: English; Correspondence Address: Fortunel, C.; INRA, UMR Ecologie des Forêts de Guyane, BP 709, 97387 Kourou Cedex, France; email: claire.fortunel@ecofog.gf |
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440 |
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Chartier, M.; Pélozuelo, L.; Buatois, B.; Bessière, J.-M.; Gibernau, M. |
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Geographical variations of odour and pollinators, and test for local adaptation by reciprocal transplant of two European Arum species |
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Journal Article |
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2013 |
Publication |
Functional Ecology |
Abbreviated Journal |
Funct. Ecol. |
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27 |
Issue |
6 |
Pages |
1367-1381 |
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Deception; Diptera; Floral scent; Geographical mosaic; Psychodidae; Sapromyophily; Transplant experiment |
| Abstract |
Interactions between entomophilous plants and their pollinators are one of the major factors shaping the evolution of floral features. As species are distributed in more or less connected populations, they have evolved in a geographical mosaic of co-evolution were the outcome of the plant-pollinator interaction is likely to vary as a result of local adaptations. Arum italicum and Arum maculatum are two species of Araceae which deceive their fly pollinators by mimicking the odour of their oviposition sites. Whereas A. italicum is known to be pollinated by flies belonging to different families (i.e. opportunist), A. maculatum relies on only two pollinating species of the family Psychodidae throughout its European repartition area (i.e. specialist). The interannual and geographical variations of pollinators and pollinator-attractive odours were described in several populations of the two species over two consecutive years. Furthermore, local adaptation to pollinators was tested by transplanting inflorescence-bearing plants between two different sites and by recording the number and composition of the insect fauna trapped inside the inflorescences during anthesis as a measure of a fitness component. Pollinators and pollinator-attractive odours of the two Arum species varied in time and space, but there was no clear odour structure between populations. When transplanted, inflorescences of both species trapped the same composition and number of insects as native inflorescences at a given site; this indicates that pollinator composition is highly dependent on the local availability of insects. No pattern of local adaptation was found for these two species, but local pollination conditions were shown to strongly affect the degree of geographical variations of these interactions. The lack of a clear odour geographical structure might be due to high gene flow or to similar selective pressures exerted by pollinators, and the high interindividual odour variation may be linked to the deceptive strategy adopted by the two plant species. © 2013 British Ecological Society. |
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Center for Functional and Evolutive Ecology, Université Montpellier 2, 1919 route de Mende, 34293 Montpellier, France |
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Export Date: 29 November 2013; Source: Scopus; Coden: Fecoe; doi: 10.1111/1365-2435.12122; Language of Original Document: English; Correspondence Address: Gibernau, M.; Joint Research Unit Ecology of Guiana Forests, CNRS-UMR 8172, Campus agronomique, BP 316, Kourou cedex, 97379, France; email: marc.gibernau@ecofog.gf; References: Ackerman, J.D., Cuevas, A.A., Hof, D., Are deception-pollinated species more variable than those offering a reward? (2011) Plant Systematics and Evolution, 293, pp. 91-99; Ackerman, J.D., Meléndez-Ackerman, E.J., Salguero-Faria, J., Variation in pollinator abundance and selection on fragrance phenotypes in an epiphytic orchid (1997) American Journal of Botany, 84, pp. 1383-1390; Adams, R.P., (2007) Identification of Essential Oil Components by Gas Chromatography/Mass Spectroscopy, , 4th edn. Allured Publishing, Carol Stream; Albre, J., Gibernau, M., Reproductive biology of Arum italicum (Araceae) in the South of France (2008) Botanical Journal of the Linnean Society, 156, pp. 43-49; Albre, J., Quilichini, A., Gibernau, M., Pollination ecology of Arum italicum (Araceae) (2003) Botanical Journal of the Linnean Society, 141, pp. 205-214; Anderson, M.J., A new method for non-parametric multivariate analysis of variance (2001) Austral Ecology, 26, pp. 32-46; Anderson, B., Johnson, S.F., The geographic mosaic of coevolution in a plant-pollinator mutualism (2007) Evolution, 62, pp. 220-225; Angert, A.L., Bradshaw, H.D., Schemske, D.W., Using experimental evolution to investigate geographic range limits in monkey flowers (2008) Evolution, 62, pp. 2660-2675; Ayasse, M., Schiestl, F.P., Paulus, H.F., Löfstedt, C., Hannson, B., Ibarra, F., Francke, W., Evolution of reproductive strategies in the sexually deceptive orchid Ophrys sphegodes: how does flower-specific variation of odor signals influence reproductive success? (2000) Evolution, 54, pp. 1995-2006; Blionis, G.J., Vokou, D., Structural and functional divergence of Campanula spatulata subspecies on Mt Olympos (Greece) (2002) Plant Systematics and Evolution, 232, pp. 89-105; Boyce, P.C., Arum – a decade of change (2006) Aroideana, 29, pp. 132-137; Bradshaw, H.D., Schemske, D.W., Allele substitution at a flower colour locus produces a pollinator shift in monkeyflowers (2003) Nature, 426, pp. 176-178; Brown, M., Downs, C.T., Johnson, S.D., Covariation of flower traits and bird pollinator assemblages among pollinations of Kniphofia linearifolia (Asphodelaceae) (2011) Plant Systematics and Evolution, 294, pp. 199-206; Campbell, D.R., Natural selection in Ipomopsis hybrid zones: implications for ecological speciation (2003) New Phytologist, 161, pp. 83-90; Chartier, M., Pelozuelo, L., Gibernau, M., Do floral odor profiles geographically vary with the degree of specificity for pollinators? Investigation in two sapromyophilous Arum species (Araceae) (2011) Annales de la Société Entomologique de France, 47, pp. 71-77; Cosacov, A., Nattero, J., Cocucci, A.A., Variation of pollinator assemblages and pollen limitation in a locally specialized system: the oil-producing Nierembergia liariifolia (Solanaceae) (2008) Annals of Botany, 102, pp. 723-734; Diaz, A., Kite, G.C., A comparison of the pollination ecology of Arum maculatum and A. italicum in England (2002) Watsonia, 24, pp. 171-181; Dormont, L., Jay-Robert, P., Bessière, J.-M., Rapior, S., Lumaret, J.-P., Innate olfactory preferences in dung beetles (2010) The Journal of Experimental Biology, 213, pp. 3177-3185; Dötterl, S., Wolfe, L.M., Jürgens, A., Qualitative and quantitative analyses of flower scent in Silene latifolia (2005) Phytochemistry, 66, pp. 203-213; Elle, E., Carney, R., Reproductive assurance varies with flower size in Collinsia parviflora (Scrophulariaceae) (2003) American Journal of Botany, 90, pp. 888-896; Ellis, A.G., Johnson, S.D., The evolution of floral variation without pollinator shifts in Gorteria diffusa (Asteraceae) (2009) American Journal of Botany, 96, pp. 793-801; Espìndola, A., Pellissier, L., Alvarez, N., Variation in the proportion of flore visitors of Arum maculatum along its distributional range in relation with community-based climatic niche analyses (2011) Oikos, 120, pp. 728-734; Faegri, K., Van Der Pijl, L., (1971) The Principles of Pollination Ecology, , Pergamon Press, Oxford; Fenster, C.B., Armbruster, W.S., Wilson, P., Dudash, M.R., Thomson, J.D., Pollination syndromes and floral specialization (2004) Annual Reviews of Ecology, Evolution and Systematics, 35, pp. 375-403; Geber, M.A., Eckhart, V.M., Experimental studies of adaptation in Clarkia xantiana. 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PhD thesis, University of Montpellier, MontpellierGibernau, M., Macquart, D., Przetak, G., Pollination in the genus Arum – a review (2004) Aroideana, 27, pp. 148-166; Gomez, J.M., Bosh, J., Perfectti, F., Fernández, J.D., Abdelaziz, M., Camacho, J.P.M., Spatial variation in selection on corolla shape in a generalist plant is promoted by the preference patterns of its local pollinators (2008) Proceedings of the Royal Society B, 275, pp. 2241-2249; Gomez, J.M., Abdelaziz, M., Camacho, J.P.M., Munoz-Pajares, A.J., Perfectti, F., Local adaptation and maladaptation to pollinators in a generalist geographic mosaic (2009) Ecology Letters, 12, pp. 672-682; Gould, S.J., Johnston, R.F., Geographic variation (1972) Annual Review of Ecology, Evolution, and Systematics, 3, pp. 457-498; Hentrich, H., Kaiser, R., Gottsberger, G., Floral biology and reproductive isolation by floral scent in three sympatric Aroid species in French Guyana (2010) Plant Biology, 12, pp. 587-596; Herrera, C.M., Castellanos, M.C., Medrano, M., Geographical context of floral evolution: towards an improved research programme in floral diversification (2006) Ecology and Evolution of Flowers, pp. 278-294. , eds L.D. 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Owens & P.J. Rudall) Royal Botanical Gardens, Kew; Knudsen, J.T., Variation in floral scent composition within and between populations of Geonoma macrostachys (Arecaceae) in the western Amazon (2002) American Journal of Botany, 89, pp. 1772-1778; Knudsen, J.T., Eriksson, R., Gershenzon, J., Ståhl, B., Diversity and distribution of floral scent (2006) The Botanical Review, 72, pp. 1-120; Lack, A.J., Diaz, A., The pollination of Arum maculatum L. – a historical review and new observations (1991) Watsonia, 18, pp. 333-342; Levin, D.A., (2000) The Origin, Expansion and Demise of Plant Species, , Oxford University Press, Oxford; Levin, D.A., Anderson, W.W., Competition for pollinators between simultaneously flowering species (1970) The American Naturalist, 104, pp. 455-467; Linz, J., Stökl, J., Urru, I., Krügel, T., Stensmyr, M.C., Hansson, B.S., Molecular phylogeny of the genus Arum (Araceae) inferred from multi-locus sequence data and AFLPs (2010) Taxon, 59, pp. 405-415; Maia, A.C.D., Dötterl, S., Kaiser, R., Silberbauer-Gottsberger, I., Teichert, H., Gibernau, M., Navarro, D.M.D.F., Gottsberger, G., The key role of 4-methyl-5-vinylthiazole in the attraction of scarab beetle pollinators: a unique olfactory floral signal shared by Annonaceae and Araceae (2012) Journal of Chemical Ecology, 38, pp. 1072-1080; Maia, A.C.D., Gibernau, M., Dötterl, S., Navarro, DM., Seifert, K., Müller, T., Schlindwein, C., The floral scent of Taccarum ulei (araceae): attraction of scarab beetle pollinators to an unusual aliphatic acyloin (2013) Phytochemistry, , http://dx.doi.org/10.1016/j.phytochem.2013.03.005, (in press); Mant, J., Peakall, R., Schiestl, F.P., Does selection on floral odor promote differentiation among populations and species of the sexually deceptive orchid genus Ophrys? (2005) Evolution, 59, pp. 1449-1463; Méndez, M., Obeso, J.R., Influencia del osmoforo en la produccion de infrutescencias en Arum italicum Miller (Araceae) (1992) Anales del Jardín Botánico de Madrid, 50, pp. 229-237; Mitchell, R.J., Flanagan, R.J., Brown, B.J., Waser, N.M., Karron, J.D., New frontiers in competition for pollination (2009) Annals of Botany, 103, pp. 1403-1413; Morgan, M.T., Selection on reproductive characters: conceptual foundations and their extension to pollinator interactions (2006) Ecology and Evolution of Flowers, pp. 25-40. , eds L.D. Harder & S.C.H. Barrett) Oxford University Press, Oxford; Nattero, J., Cocussi, A.A., Medel, R., Pollinator-mediated selection in a specialized pollination system: matches and mismatches across populations (2010) Journal of Evolutionary Biology, 23, pp. 1957-1968; Pettersson, S., Knudsen, J.T., Floral scent and nectar production in Parkia biglobosa Jacq. (Leguminosae: Mimosoideae) (2001) Botanical Journal of the Linnean Society, 135, pp. 97-106; Pichersky, E., Gershenzon, J., The formation and function of plant volatiles: perfumes for pollinator attraction and defense (2002) Plant Biology, 5, pp. 237-243; Prime, C.T., (1960) Lords and Ladies, , Harper Collins Publishers, London; Proctor, M., Leo, P., Lack, A., (1996) Natural History of Pollination, , Harper Collins Publishers, London; Raguso, R.A., Wake up and smell the roses: the ecology and evolution of floral scent (2008) Annual Review of Ecology, Evolution, and Systematics, 39, pp. 549-569; (2012) R: A language and environment for statistical computing, , http://www.R-project.org/, R Core Team R Foundation for Statistical Computing, Vienna, Austria ISBN 3-900051-07-0, URL University of Chicago Press, Chicago, IL; Renner, S.S., Rewardless flowers in the Angiosperms and the role of insect cognition in their evolution (2006) Plant-Pollinator Interactions: From Specialization to Generalization, pp. 123-144. , eds N.M. Waser & J. Ollerton University of Chicago Press, Chicago, IL; Rohacek, J., Beck-Haug, I., Dobat, K., Sphaeroceridae associated with flowering Arum maculatum (Araceae) in the vicinity of Tübingen, SW-Germany (1990) Senckenbergiana biologie, 71, pp. 259-268; Schaeffer, H.M., Ruxton, G.D., (2011) Plant-Animal Communication, , Oxford University Press, Oxford; Schiestl, F.P., Ayasse, M., Do changes in floral odor cause speciation in sexually deceptive orchids? 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Diptera: Psychodidae (1989) Dipterist Digest, 4, pp. 1-83 |
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EcoFoG @ webmaster @ |
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511 |
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Orivel, J.; Corbara, B.; Dejean, A. |
| Title |
Constraints and adaptation in the arboreal life of ants |
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Journal Article |
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2010 |
Publication |
Biofutur |
Abbreviated Journal |
Biofutur |
| Volume |
315 |
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Pages |
34-37 |
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[Orivel, Jerome] CNRS, UMR Ecol Forets Guyane, Kourou 97379, French Guiana |
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ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
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0294-3506 |
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ISI:000284987300004 |
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EcoFoG @ eric.marcon @ |
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17 |
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Leroy, C.; Cereghino, R.; Camas, J.F.; Pelozuelo, L.; Dejean, A.; Corbara, B. |
| Title |
Several aspects of the life of vascular epiphytes |
Type |
Journal Article |
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2010 |
Publication |
Biofutur |
Abbreviated Journal |
Biofutur |
| Volume |
315 |
Issue |
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Pages |
38-41 |
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[Leroy, Celine] CNRS, UMR Ecol Forets Guyane, Kourou 97379, French Guiana |
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ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
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0294-3506 |
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ISI:000284987300005 |
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no |
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EcoFoG @ eric.marcon @ |
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18 |
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Picard, N.; Mortier, F.; Rossi, V.; Gourlet-Fleury, S. |
| Title |
Clustering species using a model of population dynamics and aggregation theory |
Type |
Journal Article |
| Year |
2010 |
Publication |
Ecological Modelling |
Abbreviated Journal |
Ecol. Model. |
| Volume |
221 |
Issue |
2 |
Pages |
152-160 |
| Keywords |
Aggregation theory; Species grouping; Species richness; Tropical rainforest; Usher model |
| Abstract |
The high species diversity of some ecosystems like tropical rainforests goes in pair with the scarcity of data for most species. This hinders the development of models that require enough data for fitting. The solution commonly adopted by modellers consists in grouping species to form more sizeable data sets. Classical methods for grouping species such as hierarchical cluster analysis do not take account of the variability of the species characteristics used for clustering. In this study a clustering method based on aggregation theory is presented. It takes account of the variability of species characteristics by searching for the grouping that minimizes the quadratic error (square bias plus variance) of some model's prediction. This method allows one to check whether the gain in variance brought by data pooling compensate for the bias that it introduces. This method was applied to a data set on 94 tree species in a tropical rainforest in French Guiana, using a Usher matrix model to predict species dynamics. An optimal trade-off between bias and variance was found when grouping species. Grouping species appeared to decrease the quadratic error, except when the number of groups was very small. This clustering method yielded species groups similar to those of the hierarchical cluster analysis using Ward's method when variance was small, that is when the number of groups was small. (C) 2009 Elsevier B.V. All rights reserved. |
| Address |
[Picard, Nicolas; Mortier, Frederic; Rossi, Vivien; Gourlet-Fleury, Sylvie] CIRAD, F-34398 Montpellier 5, France, Email: nicolas.picard@cirad.fr |
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ELSEVIER SCIENCE BV |
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Edition |
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0304-3800 |
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| Notes |
ISI:000273628800004 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
85 |
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Flores, O.; Rossi, V.; Mortier, F. |
| Title |
Autocorrelation offsets zero-inflation in models of tropical saplings density |
Type |
Journal Article |
| Year |
2009 |
Publication |
Ecological Modelling |
Abbreviated Journal |
Ecol. Model. |
| Volume |
220 |
Issue |
15 |
Pages |
1797-1809 |
| Keywords |
Hierarchical Bayesian Modelling; Conditional Auto-Regressive model; Variable selection; Zero-Inflated Poisson; Posterior predictive; Paracou; French Guiana |
| Abstract |
Modelling the local density of tropical saplings can provide insights into the ecological processes that drive species regeneration and thereby help predict population recovery after disturbance. Yet, few studies have addressed the challenging issues in autocorrelation and zero-inflation of local density. This paper presents Hierarchical Bayesian Modelling (HBM) of sapling density that includes these two features. Special attention is devoted to variable selection, model estimation and comparison. We developed a Zero-Inflated Poisson (ZIP) model with a latent correlated spatial structure and compared it with non-spatial ZIP and Poisson models that were either autocorrelated (Spatial Generalized Linear Mixed, SGLM) or not (generalized linear models, GLM). In our spatial models, local density autocorrelation was modeled by a Conditional Auto-Regressive (CAR) process. 13 explicative variables described ecological conditions with respect to topography, disturbance, stand structure and intraspecific processes. Models were applied to six tropical tree species with differing biological attributes: Oxandra asbeckii, Eperua falcata, Eperua grandiflora, Dicorynia guianensis, Qualea rosea, and Tachigali melinonii. We built species-specific models using a simple method of variable selection based on a latent binary indicator. Our spatial models showed a close correlation between observed and estimated densities with site spatial structure being correctly reproduced. By contrast, the non-spatial models showed poor fits. Variable selection highlighted species-specific requirements and susceptibility to local conditions. Model comparison overall showed that the SGLM was the most accurate explanatory and predictive model. Surprisingly, zero-inflated models performed less well. Although the SZIP model was relevant with respect to data distribution, and more flexible with respect to response curves, its model complexity caused marked variability in parameter estimates. In the SUM, the spatial process alone accounted for zero-inflation in the data. A refinement of the hypotheses employed at the process level could compensate for distribution flaws at the data level. This study emphasized the importance of the HBM framework in improving the modelling of density-environment relationships. (C) 2008 Elsevier B.V. All rights reserved. |
| Address |
[Flores, O.] CNRS, Ctr Ecol Fonct & Evolut, UMR 5175, F-34293 Montpellier 5, France, Email: olivierflores@free.fr |
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ELSEVIER SCIENCE BV |
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0304-3800 |
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| Notes |
ISI:000267585400007 |
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no |
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EcoFoG @ eric.marcon @ |
Serial |
201 |
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Phillips, P.D.; Thompson, I.S.; Silva, J.N.M.; van Gardingen, P.R.; Degen, B. |
| Title |
Scaling up models of tree competition for tropical forest population genetics simulation |
Type |
Journal Article |
| Year |
2004 |
Publication |
Ecological Modelling |
Abbreviated Journal |
Ecol. Model. |
| Volume |
180 |
Issue |
2-3 |
Pages |
419-434 |
| Keywords |
tropical rain; forest; population genetics; model SYMFOR; eco-gene; scaling up; competition |
| Abstract |
Understanding the effects of logging activity on genetic diversity is an important aspect of establishing the sustainability of selective logging management operations in tropical forests. Genetic variation is affected by selective logging directly, through the removal of and damage to trees within the population, and indirectly, through a change in the forest structure and environment in which the remaining population lives. Eco-Gene is a population genetics model applied to tropical forests over a scale of hundreds of hectares. SYMFOR is a modelling framework for individual-based spatially explicit ecological and management models applied to tropical forests over a scale of 0.25 4 ha. We have linked the models to enable simulations using processes involved in both models. To overcome problems of scale, the spatially explicit competition index calculated in SYMFOR simulations has been modelled such that it can be applied at scales representing much larger areas for which the data are not available, as required by Eco-Gene. The competition index is modelled as a distribution on a grid-square basis, and implemented in the linked Eco-Gene/SYMFOR system. Each tree within a grid-square is given a “relative competition” within the distribution, biased according to species. A competition index value is obtained for the tree by transforming the grid-square distribution to be relevant to the size of the tree, and extracting a value according to the tree's relative competition within the distribution. The distribution and each tree's relative competition within it change according to the effects of growth, mortality and logging activity. The model was calibrated using data from the Tapajos region of the Eastern Amazon forest. This paper describes the model, its calibration and validation and the implications of scaling up from an explicit representation to a modelled quantity. (C) 2004 Elsevier B.V. All rights reserved. |
| Address |
Embrapa Amazonia Oriental, BR-66095100 Belem, Para, Brazil, Email: paul.phillips@envams.co.uk |
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ELSEVIER SCIENCE BV |
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|
Edition |
|
| ISSN |
0304-3800 |
ISBN |
|
Medium |
|
| Area |
|
Expedition |
|
Conference |
|
| Notes |
ISI:000224635700012 |
Approved |
no |
| Call Number |
EcoFoG @ eric.marcon @ |
Serial |
234 |
| Permanent link to this record |
