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Bandou, E.; Lebailly, F.; Muller, F.; Dulormne, M.; Toribio, A.; Chabrol, J.; Courtecuisse, R.; Plenchette, C.; Prin, Y.; Duponnois, R.; Thiao, M.; Sylla, S.; Dreyfus, B.; Ba, A.M. |
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Title |
The ectomycorrhizal fungus Scleroderma bermudense alleviates salt stress in seagrape (Coccoloba uvifera L.) seedlings |
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Journal Article |
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Year |
2006 |
Publication |
Mycorrhiza |
Abbreviated Journal |
Mycorrhiza |
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Volume |
16 |
Issue |
8 |
Pages |
559-565 |
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Coccoloba uvifera; ectomycorrhizal dependency; mineral uptake; salt stress; water status |
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The purpose of this study was to test the capacity of the ectomycorrhizal (ECM) fungus, Scleroderma bermudense, to alleviate saline stress in seagrape (Coccoloba uvifera L.) seedlings. Plants were grown over a range (0, 200, 350 and 500 mM) of NaCl levels for 12 weeks, after 4 weeks of non-saline pre-treatment under greenhouse conditions. Growth and mineral nutrition of the seagrape seedlings were stimulated by S. bermudense regardless of salt stress. Although ECM colonization was reduced with increasing NaCl levels, ECM dependency of seagrape seedlings increased. Tissues of ECM plants had significantly increased concentrations of P and K but lower Na and Cl concentrations than those of non-ECM plants. Higher K concentrations in the leaves of ECM plants suggested a higher osmoregulating capacity of these plants. Moreover, the water status of ECM plants was improved despite their higher evaporative leaf surface. The results suggest that the reduction in Na and Cl uptake together with a concomitant increase in P and K absorption and a higher water status in ECM plants may be important salt-alleviating mechanisms for seagrape seedlings growing in saline soils. |
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Univ Antilles Guyane, Fac Sci Exactes & Nat, Lab Biol & Physiol Vegetales, F-97159 Guadeloupe, France, Email: amadou.ba@univ-ag.fr |
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0940-6360 |
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ISI:000241687200006 |
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EcoFoG @ eric.marcon @ |
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221 |
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Lenoir, A.; Touchard, A.; Devers, S.; Christidès, J.-P.; Boulay, R.; Cuvillier-Hot, V. |
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Title |
Ant cuticular response to phthalate pollution |
Type |
Journal Article |
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Year |
2014 |
Publication |
Environmental Science and Pollution Research |
Abbreviated Journal |
Environ. Sci. Pollut. Res. |
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Volume |
21 |
Issue |
23 |
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13446-13451 |
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Keywords |
Absorption; Ants; Bbp; Bioindicator; Cuticle; Dbp; Dehp; DiBP; Phthalates; Pollutants |
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Abstract |
Phthalates are common atmospheric contaminants used in the plastic industry. Ants have been shown to constitute good bioindicators of phthalate pollution. Hence, phthalates remain trapped on ant cuticles which are mostly coated with long-chain hydrocarbons. In this study, we artificially contaminated Lasius niger ants with four phthalates: dibutyl phthalate (DBP), diisobutyl phthalate (DiBP), di(2-ethylhexyl) phthalate (DEHP), and benzyl butyl phthalate (BBP). The first three have previously been found on ants in nature in Touraine (France), while the fourth has not. The four phthalates disappeared rapidly (less than 5 days) from the cuticles of live ants. In contrast, on the cuticles of dead ants, DEHP quantities remained unchanged over time. These results indicate that phthalates are actively absorbed by the cuticles of live ants. Cuticular absorption of phthalates is nonspecific because eicosane, a nonnatural hydrocarbon on L. niger cuticle, was similarly absorbed. Ants are important ecological engineers and may serve as bioindicators of ecosystem health. We also suggest that ants and more generally terrestrial arthropods may contribute to the removal of phthalates from the local environment. |
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CNRS, UMR Écologie des Forêts de Guyane (EcoFoG), Campus Agronomique, BP 316Kourou Cedex, France |
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Springer Verlag |
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09441344 (Issn) |
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Export Date: 5 December 2014; Coden: Esple; Correspondence Address: Lenoir, A.; IRBI, Institut de Recherche sur la Biologie de l’Insecte, UMR CNRS 7261, Université François RabelaisFrance |
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EcoFoG @ webmaster @ |
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570 |
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Devault, D.A.; Beilvert, B.; Winterton, P. |
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Title |
Ship breaking or scuttling? A review of environmental, economic and forensic issues for decision support |
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Journal Article |
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Year |
2017 |
Publication |
Environmental Science and Pollution Research |
Abbreviated Journal |
Environ. Sci. Pollut. Res. |
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Volume |
24 |
Issue |
33 |
Pages |
25741-25774 |
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Artificial reef; Diving; Ship recycling; Ship Recycling Facilities; Shipbreaking; Tourism; Working conditions; Wrecks; artificial reef; coastal erosion; coastal zone management; cost-benefit analysis; decision support system; developing world; economic impact; environmental economics; environmental impact assessment; environmental issue; facility location; health and safety; invasive species; profitability; recycling; shipping; tourism; working conditions; wreck; analysis; decision support system; economics; international cooperation; pollution; prevention and control; procedures; recycling; ship; statistics and numerical data; Decision Support Techniques; Environmental Pollution; Internationality; Recycling; Ships |
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In a globalized world, the world trade fleet plays a pivotal role in limiting transport costs. But, the management of obsolete ships is an acute problem, with most Ship Recycling Facilities (SRF) situated in developing countries. They are renowned for their controversial work and safety conditions and their environmental impact. Paradoxically, dismantlement is paid for by the shipowners in accordance with international conventions therefore it is more profitable for them to sell off ships destined for scrapping. Scuttling, the alternative to scrapping, is assessed in the present review to compare the cost/benefit ratios of the two approaches. Although scrapping provides employment and raw materials – but with environmental, health and safety costs – scuttling provides fisheries and diving tourism opportunities but needs appropriate management to avoid organic and metal pollution, introduction of invasive species and exacerbation of coastal erosion. It is also limited by appropriate bottom depth, ship type and number. The present review inventories the environmental, health, safety, economic, and forensic aspects of each alternative. © 2016, Springer-Verlag Berlin Heidelberg. |
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Département Langues et Gestion, Université Toulouse III – Paul Sabatier, 118 route de Narbonne, Toulouse cedex 09, 31062, France |
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Springer Verlag |
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09441344 (Issn) |
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no |
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EcoFoG @ webmaster @ |
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869 |
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Baudrimont, M.; Arini, A.; Guégan, C.; Venel, Z.; Gigault, J.; Pedrono, B.; Prunier, J.; Maurice, L.; Ter Halle, A.; Feurtet-Mazel, A. |
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Title |
Ecotoxicity of polyethylene nanoplastics from the North Atlantic oceanic gyre on freshwater and marine organisms (microalgae and filter-feeding bivalves) |
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Journal Article |
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Year |
2020 |
Publication |
Environmental Science and Pollution Research |
Abbreviated Journal |
Environ. Sci. Pollut. Res. |
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Volume |
27 |
Issue |
4 |
Pages |
3746-3755 |
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Keywords |
Cordicula fluminea; Ecotoxicity; Nanoplastics; Polyethylene; Scenedesmus subspicatus; Thalassiosira weissiflogii; bivalve; concentration (composition); ecotoxicology; filter feeder; gyre; microalga; nanoparticle; plastic waste; pollution exposure; polymer; Atlantic Ocean; Atlantic Ocean (North); Bivalvia; Chlorophyta; Corbicula fluminea; Desmodesmus subspicatus; Nitzschia alba; Thalassiosira |
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Each year, 5 to 10 million tons of plastic waste is dumped in the oceans via freshwaters and accumulated in huge oceanic gyres. Under the effect of several abiotic factors, macro plastic wastes (or plastic wastes with macro sizes) are fractionated into microplastics (MP) and finally reach the nanometric size (nanoplastic NP). To reveal potential toxic impacts of these NPs, two microalgae, Scenedemus subspicatus (freshwater green algae), and Thalassiosira weissiflogii (marine diatom) were exposed for up to 48 h at 1, 10, 100, 1000, and 10,000 μg/L to reference polyethylene NPs (PER) or NPs made from polyethylene collected in the North Atlantic gyre (PEN, 7th continent expedition in 2015). Freshwater filter-feeding bivalves, Corbicula fluminea, were exposed to 1000 μg/L of PER and PEN for 48 h to study a possible modification of their filtration or digestion capacity. The results show that PER and PEN do not influence the cell growth of T. weissiflogii, but the PEN exposure causes growth inhibition of S. subspicatus for all exposure concentrations tested. This growth inhibition is enhanced for a higher concentration of PER or PEN (10,000 μg/L) in S. subspicatus. The marine diatom T. weissiflogii appears to be less impacted by plastic pollution than the green algae S. subspicatus for the exposure time. Exposure to NPs does not lead to any alteration of bivalve filtration; however, fecal and pseudo-fecal production increased after PEN exposure, suggesting the implementation of rejection mechanisms for inedible particles. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. |
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UMR IMRCP 5623, Université Paul Sabatier, CNRS, 118, route de Narbonne, Toulouse, 31062, France |
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Springer |
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Cited By :1; Export Date: 23 March 2020; Coden: Esple; Correspondence Address: Baudrimont, M.; UMR EPOC 5805, Université de Bordeaux—CNRS, Place du Dr Peyneau, France; email: magalie.baudrimont@u-bordeaux.fr |
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EcoFoG @ webmaster @ |
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925 |
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Robillard, T.; ter Hofstede, H.M.; Orivel, J.; Vicente, N.M. |
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Bioacoustics of the Neotropical Eneopterinae (Orthoptera, Grylloidea, Gryllidae) |
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Journal Article |
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Year |
2015 |
Publication |
Bioacoustics |
Abbreviated Journal |
Bioacoustics |
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24 |
Issue |
2 |
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123-143 |
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In members of the cricket subfamily Eneopterinae (Orthoptera, Grylloidea), songs with powerful high-frequency (HF) harmonics have evolved, which likely represents a distinctive acoustic adaptation. In this study, we analysed or reanalysed the songs of the three eneopterine genera present in the Neotropics to evaluate whether they also possess high-amplitude HF components. We present new data and combine several lines of evidence to interpret or reinterpret the calling signals of a representative species for each genus. We used new recordings in order to detect and analyse potential HF components of the songs. Stridulatory files were measured, and stridulation was studied using high-speed video recordings. The results suggest that all eneopterine genera from the Neotropics use HFs to communicate, based on the rich harmonic content of their songs. Strikingly, the Neotropical eneopterines possess high dominant frequencies, recalling the patterns observed in the tribe Lebinthini, the most speciose tribe of the subfamily distributed in the Western Pacific region and in Southeast Asia: Ligypterus and Ponca show dominant harmonic peaks, whereas Eneoptera possesses unique features. The three species under study, however, deal differently with HFs. |
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Taylor & Francis |
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0952-4622 |
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doi: 10.1080/09524622.2014.996915 |
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EcoFoG @ webmaster @ |
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651 |
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Herault, B.; Thoen, D. |
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Title |
Diversity of plant assemblages in isolated depressional wetlands from Central-Western Europe |
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Journal Article |
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Year |
2008 |
Publication |
Biodiversity and Conservation |
Abbreviated Journal |
Biodivers. Conserv. |
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17 |
Issue |
9 |
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2169-2183 |
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closed depressions; connectivity; fens; forest; grassland; habitat area; landscape matrix |
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A closed depression is defined as a geomorphologic element where a sediment depository is encircled by hillslopes. Despite the fact that closed depressions are often the only stagnant water points in many European landscapes, few ecological researches on their plant assemblages have been done. The main goal of this study was to give first results of the environmental factors responsible for the vegetation composition, richness and rarity in the closed depressions of the Lorraine biogeographical district (Belgium, France and grand-duche de Luxembourg). We surveyed for plant presence 85 forest and 77 grassland closed depressions. For each site, wetland area, local environmental factors and regional connectivities registered. For each species, the Ellenberg values were compiled. To investigate the main source of variation in species composition and in species richness (including richness in rare species), Non-metric Multidimensional Scaling analyses and Generalized Linear Models were respectively used. Species pools in forest (forest and preforest species) and in grassland (bog plants, pioneers, helophytes) were quite different. In both landscapes, a gradient from plants typical of basic high-productive soils to plants typical of acid low-productive soils reflects a shared successional gradient. The accumulation of organic matter allowed the establishment of Sphagnum spp., which slowly acidified the soil and thus acted as ecosystem engineers for the arrival of bog plants. Moreover, the species composition was additionally driven by the plant light tolerance in forests and by the plant water requirements in grasslands. Mechanisms of species accumulation (increase in species richness) were different in forests and in grasslands: respectively related to the plant light tolerance and to the wetland area. At the regional level, the averaged soil productivity was negatively related to the richness in rare species. Indeed, perennial highly-competitive plants such as Glyceria spp., Iris pseudacorus or Urtica dioica impeded the establishment of smaller and rarer species. At the habitat level, isolated closed depressions (due to either low connectivity or low grazing pressure) have more habitat rare species, giving evidences of dispersal limitation in plant assemblages of closed depressions. |
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[Herault, Bruno] Inst Bot, Ctr Ecol Vegetale & Hydrol, F-67083 Strasbourg, France, Email: bruno.herault@cirad.fr |
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SPRINGER |
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0960-3115 |
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ISI:000257486400008 |
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EcoFoG @ eric.marcon @ |
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135 |
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Sist, P.; Brown, N. |
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Silvicultural intensification for tropical forest conservation: a response to Fredericksen and Putz |
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Journal Article |
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2004 |
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Biodiversity and Conservation |
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13 |
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12 |
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2381-2385 |
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0960-3115 |
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WOS:000225691300011 |
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EcoFoG @ webmaster @ |
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308 |
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Charles-Dominique, P.; Chave, J.; Dubois, M.A.; De Granville, J.J.; Riera, B.; Vezzoli, C. |
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Title |
Colonization front of the understorey palm Astrocaryum sciophilum in a pristine rain forest of French Guiana |
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Journal Article |
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Year |
2003 |
Publication |
Global Ecology and Biogeography |
Abbreviated Journal |
Glob. Ecol. Biogeogr. |
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12 |
Issue |
3 |
Pages |
237-248 |
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Astrocaryum sciophilum; French Guiana; neotropical palaeoecology; palm ecology; population edge; refuges; scatter-hoarding; seed dispersal; spatial pattern |
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Aims Astrocaryum sciophilum (Miq.) Pulle (Arecaceae) is an understorey palm, endemic to north-eastern South America with a patchy distribution. We tested the hypothesis that the spatial distribution of this palm species is not in equilibrium but is slowly colonizing the forest understorey. Location Inventories and seed dispersal studies were conducted in the undisturbed tropical forest close to the Nouragues research station, French Guiana. Additional data were collected in the entire territory of French Guiana. Methods We studied the demography of A. sciophilum on a 20-ha plot located at the edge of its distribution. The age of the palms was estimated by postulating an exponentially decreasing abundance by age class. Direct seed dispersal experiments were also conducted, to estimate dispersal parameters. The seeds of A. sciophilum were dispersed only by rodents. This information was used to parameterize a forest growth simulator, to study the spatial spread of this species. Results Within the sampling plot, the density of A. sciophilum dropped sharply from about 500 individuals per hectare to zero. The maturation age was estimated to be 170+/-70 years, and over 55 years with 95% confidence. Seed-dispersal experiments yielded an average seed dispersal distance of 11 m and a maximum estimated dispersal distance of 125 m across a generational span of 55 years to maturity. Therefore, the maximal estimated colonization speed is 2.3 m/y. Conclusions Empirical results and numerical simulations suggest that the boundary of the A. sciophilum population is a colonization front, and that the range of this species is slowly expanding. The implications of this result in respect of palaeoenvironmental changes in this region are discussed. |
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Natl Museum Nat Hist, Lab Ecol Gen, F-91800 Brunoy, France |
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BLACKWELL PUBLISHING LTD |
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0960-7447 |
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ISI:000182184100006 |
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EcoFoG @ eric.marcon @ |
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273 |
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Salvin, P.; Roos, C.; Robert, F. |
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Title |
Tropical mangrove sediments as a natural inoculum for efficient electroactive biofilms |
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Journal Article |
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Year |
2012 |
Publication |
Bioresource Technology |
Abbreviated Journal |
Bioresour. Technol. |
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120 |
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45-51 |
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Chronoamperometry; Cyclic voltammetry; Electroactive biofilms; Microbial fuel cells; Three-electrode systems |
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Abstract |
Chronoamperometry is known to be an efficient way to form electroactive biofilms (EAB) on conductive electrodes. For the first time, tropical mangrove sediments are analyzed as a potential inoculum to form MFC anodes with the use of acetate as substrate. The performance of the EAB-coated carbon cloth electrodes are evaluated according to the maximal current density, the coulombic efficiency and the cyclic voltammogramms. Working electrodes (WE) polarized at -0.2V/SCE gave better results compared to -0.4V/SCE and 0.0V/SCE. The maximal current density attained was 12A/m 2 with a CE of 24%. Contributions of the EAB in the generation of current were discussed and mechanisms of electronic transfer by the bacteria were discussed. Epifluorescence and SEM images showed the evolution of the biofilms on the electrode surface and the heterogeneity of the structure. © 2012 Elsevier Ltd. |
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Laboratoire des Matériaux et des Molécules en Milieu Amazonien, Université des Antilles et de la Guyane, UAG-UMR ECOFOG, F-97337 Cayenne, French Guiana |
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09608524 (Issn) |
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Export Date: 16 August 2012; Source: Scopus; Coden: Birte; doi: 10.1016/j.biortech.2012.05.131; Language of Original Document: English; Correspondence Address: Robert, F.; Laboratoire des Matériaux et des Molécules en Milieu Amazonien, Université des Antilles et de la Guyane, UAG-UMR ECOFOG, F-97337 Cayenne, French Guiana; email: florent.robert@guyane.univ-ag.fr |
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EcoFoG @ webmaster @ |
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421 |
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Author |
Duminil, J.; Caron, H.; Scotti, I.; Cazal, S.O.; Petit, R.J. |
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Title |
Blind population genetics survey of tropical rainforest trees |
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Journal Article |
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Year |
2006 |
Publication |
Molecular Ecology |
Abbreviated Journal |
Mol. Ecol. |
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Volume |
15 |
Issue |
12 |
Pages |
3505-3513 |
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Keywords |
Bayesian assignment tests; genetic diversity; geographical structure; South America; species delimitation |
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Abstract |
Rainforest tree species can be difficult to identify outside of their period of reproduction. Vascular tissues from Carapa spp. individuals were collected during a short field trip in French Guiana and analysed in the laboratory with nuclear and chloroplast markers. Using a Bayesian approach, > 90% of the samples could be assigned to one of two distinct clusters corresponding to previously described species, making it possible to estimate the genetic structure of each species and to identify cases of introgression. We argue that this blind procedure represents a first-choice rather than a fallback option whenever related taxa are investigated. |
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INRA, UMR Biodivers Genes & Ecosyst, F-33612 Cestas, France, Email: caron@pierroton.inra.fr |
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BLACKWELL PUBLISHING |
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0962-1083 |
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ISI:000241157400002 |
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EcoFoG @ eric.marcon @ |
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175 |
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