Consulta: subjectFacets:"French Guiana"
Registros recuperados: 35
Data/hora: 29/05/2024 04:43:50

Marine biodiversity in French Guiana: Estuarine, coastal, and shelf ecosystems under de influence of Amazonian waters
Provedor de dados: 72
Autores: Artigas,Luis Felipe; Vendeville,Philippe; Leopold,Marc; Guiral,Daniel; Ternon,Jean-François.
Marine biodiversity in French Guiana is strongly influenced by the amagon River waters of the river Amazon, which constitute a major structuring factor for the estuarine, coastal, and shelf marine ecosystems. Moreover, the marked seasonal and interannual variabilities play important roles in the stability or fluctuations in the environmental parameters that influence biodiversity at the ecological, population, and genetic levels. Previous and ongoing studies of the marine and littoral biota relate mostly to commercial marine species, protected species in danger of extinction and, specially, to the biodiversity and functioning of local coastal and littoral ecosystems such as estuaries, mudflats, sandy beaches and, particularly, littoral mangroves. A more...
Tipo: Journal article
Palavras-chave: French Guiana; Marine biodiversity; Coastal systems; Amazon river waters; Intertropical Convergence Zone; Ecological and conservation studies.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382003000200013

Dynamics of the Estuarine Turbidity Maximum Zone from Landsat-8 Data: The Case of the Maroni River Estuary, French Guiana
Provedor de dados: 5
Autores: Abascal-zorrilla, Noelia; Vantrepotte, Vincent; Huybrechts, Nicolas; Ngoc, Dat Dinh; Anthony, Edward J.; Gardel, Antoine.
The estuarine turbidity maximum (ETM) zone occurs in river estuaries due to the effects of tidal dynamics, density-driven residual circulation and deposition/erosion of fine sediments. Even though tropical river estuaries contribute proportionally more to the sediment supply of coastal areas, the ETM in them has been hardly studied. In this study, surface suspended particulate matter (SPM) determined from OLI (Operational Land Imager)-Landsat 8images was used to gain a better understanding of the spatio-temporal dynamics of the ETM of the tropical Maroni estuary (located on the Guianas coast, South America). A method to estimate the remotely-sensed ETM location and its spatiotemporal evolution between 2013 and 2019 was developed. Each ETM was defined from...
Tipo: Text
Palavras-chave: Estuarine turbidity maximum; Landsat-8; Tropical estuary; Mud banks; French Guiana.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75263/75468.pdf

Resurgence risk for malaria, and the characterization of a recent outbreak in an Amazonian border area between French Guiana and Brazil
Provedor de dados: 5
Autores: Mosnier, Emilie; Dusfour, Isabelle; Lacour, Guillaume; Saldanha, Raphael; Guidez, Amandine; Gomes, Margarete S.; Sanna, Alice; Epelboin, Yanouk; Restrepo, Johana; Davy, Damien; Demar, Magalie; Djossou, Félix; Douine, Maylis; Ardillon, Vanessa; Nacher, Mathieu; Musset, Lise; Roux, Emmanuel.
Background In 2017, inhabitants along the border between French Guiana and Brazil were affected by a malaria outbreak primarily due to Plasmodium vivax (Pv). While malaria cases have steadily declined between 2005 and 2016 in this Amazonian region, a resurgence was observed in 2017. Methods Two investigations were performed according to different spatial scales and information details: (1) a local study on the French Guiana border, which enabled a thorough investigation of malaria cases treated at a local village health center and the entomological circumstances in the most affected neighborhood, and (2) a regional and cross-border study, which enabled exploration of the regional spatiotemporal epidemic dynamic. Number and location of malaria cases were...
Tipo: Text
Palavras-chave: Plasmodium vivax; Anopheles darlingi; French Guiana; Brazil; Transnational; Outbreak investigation; Indigenous south Americans; Malaria; Amazonia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00632/74387/74081.pdf

Late quaternary paleoceanography of the French Guiana continental shelf: Clay-mineral evidence
Provedor de dados: 5
Autores: Pujos, M; Latouche, C; Maillet, N.
Marine muds deposited on the French Guiana coast mostly originate in the Amazon. Recent sediments are composed of (a) illite (33 %) and chlorite (13 %) of Andean mountain origin; and (b) kaolinite (28 %) and smectite (26 %), principally from the Amazonian lowlands but also from the Guiana Shield. In the coastal mud prism, high-resolution seismic profiles, together with sedimentological, micropaleontological and soil engineering studies, supplemented by C-14 dates, permitted a stratigraphic interpretation of eight cores. Three episodes have been determined on the basis of clay-mineral variations related to Amazonian lowland, Andean and Guiana shield sources. The older episodes 3 (3000-1700 y BP) and 2 (1700-1000 y BP) are predominantly characterized by...
Tipo: Text
Palavras-chave: Late quaternary; French Guiana; Shelf; Clay minerals; ENSO.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00094/20506/18175.pdf

Les minéraux lourds des sables du littoral de la Guyane française : bilan sur l’origine des dépôts de la plate-forme des Guyanes
Provedor de dados: 5
Autores: Pujos, M; Pons, Jc; Parra, M.
The distribution of heavy minerals on beaches and beach ridges sands of French Guiana shows three distinct suites from East to West: amphibole (largely dominant), staurolite, epidote and pyroxene off the Cayenne region, tourmaline and amphibole mainly off the Kourou-Mana, garnet, staurolite and tourmaline off the Mana-Maroni. A very good continuity exists between the assemblages of heavy minerals from the catchment area parent-rocks, the fluviatile sediments, the coastal zone and the shelf. The results of this study indicate and strengthen a local origin for the sandy sediments and do not support a possibility of an Amazonian source.
Tipo: Text
Palavras-chave: Guyane française; Plages; Cordons sableux; Minéraux lourds; French Guiana; Beaches; Beach ridges sands; Heavy minerals.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00291/40271/38643.pdf

The Amazonian Savannas of French Guiana: Cultural and Social Importance, Biodiversity, and Conservation Challenges
Provedor de dados: 5
Autores: Stier, Anna; De Carvalho, William D.; Rostain, Stephen; Catzeflis, Francois; Claessens, Olivier; Dewynter, Mael; Mckey, Doyle; Mustin, Karen; Palisse, Marianne; De Thoisy, Benoit.
The Amazonian savannas of French Guiana are rare and of high ecological and cultural value but are also highly threatened. They are socioecological systems that have been coconstructed by humans and nature and today form mosaic landscapes along the country's coast. From pre-Columbian raised fields through colonial and Creole uses to contemporary uses, they have been largely shaped and modified by human activities. They are currently threatened by changes in fire regimes, agricultural practices, invasive species, and infrastructure development. Less than 3% are protected, despite their importance for several endangered animal and plant species. A shift is required in the way we think about their conservation to create a new strategy that would be completely...
Tipo: Text
Palavras-chave: Archeology; Biodiversity; Conservation; French Guiana; Savanna; Socioecological systems.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71928/70614.pdf

Regulation of nitrogen fixation from free-living organisms in soil and leaf litter of two tropical forests of the Guiana shield
Provedor de dados: 5
Autores: Van Langenhove, Leandro; Depaepe, Thomas; Vicca, Sara; Van Den Berge, Joke; Stahl, Clement; Courtois, Elodie; Weedon, James; Urbina, Ifigenia; Grau, Oriol; Asensio, Dolores; Peñuelas, Josep; Boeckx, Pascal; Richter, Andreas; Van Der Straeten, Dominique; Janssens, Ivan A.
Background and aims Biological fixation of atmospheric nitrogen (N2) is the main pathway for introducing N into unmanaged ecosystems. While recent estimates suggest that free-living N fixation (FLNF) accounts for the majority of N fixed in mature tropical forests, the controls governing this process are not completely understood. The aim of this study was to quantify FLNF rates and determine its drivers in two tropical pristine forests of French Guiana. Methods We used the acetylene reduction assay to measure FLNF rates at two sites, in two seasons and along three topographical positions, and used regression analyses to identify which edaphic explanatory variables, including carbon (C), nitrogen (N), phosphorus (P) and molybdenum (Mo) content, pH, water...
Tipo: Text
Palavras-chave: Free-living nitrogen fixation; Tropical forest; French Guiana; Nutrients; Phosphorus; Molybdenum.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59901/63083.pdf

Géochimie du mercure dans le continuum de la retenue de Petit-Saut et de l'estuaire du Sinnamary, Guyane française
Provedor de dados: 5
Autores: Muresan Paslaru, Bogdan.
The mercury cycle was explored in the Petit-Saut reservoir / Sinnamary Estuary continuum in French Guiana. Main processes involve (i) photo-induced reduction, (ii) adsorption and desorption at the particle surfaces, (iii) methylating bacterial activity, (iv) precipitation and dissolution of iron oxyhydroxides and sulfides. Sources of mercury to the Petit-Saut reservoir consist of the partly impacted river-tributaries, the atmospheric deposition and the flooded soils or vegetation. Once into the reservoir, divalent mercury undergoes a large spectrum of transformations including speciation and phase changes. We, here, probe these processes and demonstrate that the Petit-Saut reservoir behaves as a privileged site for atmospheric recycling and in situ...
Tipo: Text
Palavras-chave: Atmosphere; Estuary; Reservoir; French Guiana; Methylmercury; Mercury; Atmosphère; Estuaire; Retenue; Guyane française; Methylmercure; Mercure.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/these-1508.pdf

Amélioration des techniques d'élevage de la chevrette Macrobrachium rosenbergii en Guyane
Provedor de dados: 5
Autores: Griessinger, Jean-michel; Gondouin, Philippe; Dutto, Gilbert; Lacroix, Denis; Pollet, Thierry; Falguiere, Jean-claude; Mer, Gilles.
En 1987, l'analyse du système d'élevage en continu menée par l' IFREMER tant sur les fermes guyanaises que sur la station expérimentale de Kourou a permis de mettre en évidence les limites et les faiblesses de ce mode d'élevage. Elle a montré la nécessité d'un meilleur contrôle du cheptel depuis l'ensemencement jusqu'à la commercialisation afin de pouvoir atteindre de manière fiable des rendements de l'ordre de 2,5 T/ha/an.
Tipo: Text
Palavras-chave: Elevage; Chevrette; Macrobrachium rosenbergii; Guyane; Zootechnie; Production; Grow-out; Freshwater prawn; Macrobrachium rseenbergii; French Guiana; Production.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00041/15266/12618.pdf

Enzymatic polymorphism study as help for constitution of initial broodstock for a new cultivated finfish species.
Provedor de dados: 5
Autores: Renno, J; Luquet, P.
Leporinus friderici is a South American promising species for fish culture. In French Guiana the "morphological species", L. friderici, L. granti, L. lebaili and L. affinis steyermarki are found. Their identification is sometimes difficult on usual criterion. To constitute an initial broodstock of L. friderici from local wild populations, the genetic structure of these species was studied. Fifteen enzyme systems, representing twenty loci, were screened.
Tipo: Text
Palavras-chave: French Guiana; Leporinus; Leporinus granti; Leporinus friderici; Anostomidae; Pisces; Embryos; Mortality; Genetics; Freshwater fish; Rearing; Breeding; Biopolymorphism; Brood stocks; Enzymatic activity.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1441.pdf

Coping with branch excision when measuring leaf net photosynthetic rates in a lowland tropical forest
Provedor de dados: 5
Autores: Verryckt, Lore T.; Van Langenhove, Leandro; Ciais, Philippe; Courtois, Elodie A.; Vicca, Sara; Peñuelas, Josep; Stahl, Clément; Coste, Sabrina; Ellsworth, David S.; Posada, Juan M.; Obersteiner, Michael; Chave, Jérôme; Janssens, Ivan A.
Measuring leaf gas exchange from canopy leaves is fundamental for our understanding of photosynthesis and for a realistic representation of carbon uptake in vegetation models. Since canopy leaves are often difficult to reach, especially in tropical forests with emergent trees up to 60 m at remote places, canopy access techniques such as canopy cranes or towers have facilitated photosynthetic measurements. These structures are expensive and therefore not very common. As an alternative, branches are often cut to enable leaf gas exchange measurements. The effect of branch excision on leaf gas exchange rates should be minimized and quantified to evaluate possible bias. We compared light‐saturated leaf net photosynthetic rates measured on excised and intact...
Tipo: Text
Palavras-chave: Branch cutting; Canopy physiology; French Guiana; Gas exchange; Photosynthesis; Rainforest; Stomatal conductance.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00613/72466/71949.pdf

A test of community assembly rules using foliar endophytes from a tropical forest canopy
Provedor de dados: 5
Autores: Donald, Julian; Roy, Mélanie; Suescun, Uxue; Iribar, Amaia; Manzi, Sophie; Péllissier, Léonie; Gaucher, Philippe; Chave, Jérôme.
1.Community assembly theory assumes that ecological communities are spatially delimited into patches. Within these patches, coexistence results from environmental filtering, competition, and immigration. Truly delineated communities exist in laboratory studies of microbial cultures in Petri dishes, yet empirical tests conducted in continuous environments often use patches defined by convention as opposed to realised boundaries. 2.Here we perform a test of ecological community assembly rules using foliar endophyte communities from a tropical rainforest, where leaves are considered as patches for both fungal and bacterial communities. We determined the diversity of fungal and bacterial endophytes using environmental DNA sequencing of 365 top‐canopy leaves,...
Tipo: Text
Palavras-chave: Bacteria; Distribution; French Guiana; Fungi; Metabarcoding; Plant–pathogen interactions; Rainforest.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00606/71808/70296.pdf

The Advantages of Landsat 8-OLI-Derived Suspended Particulate Matter Maps for Monitoring the Subtidal Extension of Amazonian Coastal Mud Banks (French Guiana)
Provedor de dados: 5
Autores: Zorrilla, Noelia Abascal; Vantrepotte, Vincent; Gensac, Erwan; Huybrechts, Nicolas; Gardel, Antoine.
The coast of French Guiana is characterised by the northwestward migration of large mud banks alongshore and by high concentrations of suspended particulate matter (SPM) resulting from the strong influence of the Amazon River outflow. Surface OLI SPM concentration, linked to the footprint of the subtidal part of mud banks due to resuspension and migration processes, was used to develop a method to estimate the location of this footprint. A comparison of the results from this method with those obtained by locating the limit of the wave damping, which characterises muddy coasts, revealed good performance of the method based on recurring SPM values. The migration rates of the mud banks in French Guiana were calculated according to the delimitation of their...
Tipo: Text
Palavras-chave: Suspended matter; Mud banks; Ocean colour; Landsat 8; French Guiana.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00638/74965/75941.pdf

Hunting in French Guiana Across Time, Space and Livelihoods
Provedor de dados: 5
Autores: Richard-hansen, Cecile; Davy, Damien; Longin, Guillaume; Gaillard, Laurent; Renoux, François; Grenand, Pierre; Rinaldo, Raphaëlle.
Hunting sustainability in Amazonian ecosystems is a key challenge for modern stakeholders. Predictive models have evolved from first mostly biological data-based to more recent modeling including human behavior. We analyze here the hunting data collected in French Guiana through a panel of indices aiming at drawing the puzzle of parameters influencing hunting activity and impact in various socio ecological conditions across the country. Data were collected from five different study sites differing in cultural origins and remoteness from market economy, and over a 10 years period. Most indices show an impact on wildlife populations, and using a full set of indicators allowed us to better understand some underlying mechanisms that lead to a community's...
Tipo: Text
Palavras-chave: Sustainable hunting; French Guiana; Indices; Livelihoods; Diachronic.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00606/71806/70294.pdf

Spatio-seasonal patterns of demersal fish communities on the French Guiana Coast
Provedor de dados: 5
Autores: Le Joncour, Anna; Blanchard, Fabian; Tagliarolo, Morgana.
Estuarine and coastal areas are often considered as hotspots due to their high diversity and ecological importance. However, communities living on those areas are often submitted to fishery and climate change pressures causing modifications on fish assemblages. French Guiana’s coastal shelf is characterised by warm waters with high turbidity and low salinity caused by the large river discharges from the Amazon and nearby estuaries. The high productivity of these areas supports fisheries and aquaculture activities. However, the structure and dynamics of coastal fish populations in French Guiana have seldom been studied. The aim of this study was to understand the effect of environmental conditions, as well as the influence of the coast and nearby estuaries...
Tipo: Text
Palavras-chave: French Guiana; Coastal community; Estuary; Diversity; Tropical waters; Fisheries management.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00607/71929/73534.pdf

Etude de la variation des paramètres biomasse (Chla) et turbidité sur plus de 10 années dans les eaux marines guyanaises par imagerie satellite. - Phase 2 : utilisation de la résolution à 300 m
Provedor de dados: 5
Autores: Lampert, Luis; Bryere, Philippe; Gohin, Francis.
On the extremely turbid waters of French Guyana, the high-resolution satellite imagery (300 m) seems a very good tool for monitoring coastal and estuarine waters. It is possible to adjust the algorithms and calculation methods to be in the range of values suggested by in-situ measurements and thus, have the long data series, where P90chla and P90turbi parameters can be calculated on the MEC.
Tipo: Text
Palavras-chave: Guyane française; Images satellite; Turbidité; Chlorophylle; P90; MEC; MET; DCE; French Guiana; Satellite imagery; Turbidity; Chlorophyll; P90; MEC; MET; DCE.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00369/47992/48020.pdf

Heavy metals distribution in mangrove sediments along the mobile coastline of French Guiana
Provedor de dados: 5
Autores: Marchand, Cyril; Lallier Verges, E; Baltzer, F; Alberic, P; Cossa, Daniel; Baillif, P.
The accumulation of nine heavy metals in fine-grained sediments from the mangrove fringed coast of French Guiana is evaluated. The dynamic features of the South American tropical coastline, from the Amazon to the Orinoco Rivers, result in mangrove sediments being alternately submitted to phases of erosion and net sedimentation a few tens of years long. This process influences the distribution of the heavy metals associated with these frequently re-mobilized deposits. Sedimentary cores and mangrove plant samples were collected, at different seasons, in various swamps characterized by different properties (content of sedimentary organic matter, distance from sea water and fresh water). The ranges of measured concentrations expressed in mu mol g(-1) were the...
Tipo: Text
Palavras-chave: French Guiana; Mangrove; Fe/Mn cycling; Heavy metals.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1041.pdf

Brachyuran crab community structure and associated sediment reworking activities in pioneer and young mangroves of French Guiana, South America
Provedor de dados: 5
Autores: Aschenbroich, Adelaide; Michaud, Emma; Stieglitz, Thomas; Fromard, Francois; Gardel, Antoine; Tavares, Marcos; Thouzeau, Gerard.
This study in French Guiana evaluates the changes of crab assemblages and their bioturbation activities between mangrove early stages (pioneer and young mangrove) and within stages by taking their spatial heterogeneity (tidal channels, flat areas, pools) into account. The results show differences in crab assemblage structure between and within the early stages of mangrove in relation to microhabitat and sediment characteristics. The sediment reworking rates are a function of the biomass or density of particular species (Ucides cordatus, Uca cumulanta) and burrower functional groups. Crab species or functional interaction mediate changes in sediment reworking rates suggesting the need to consider entire benthic communities rather than single species. This...
Tipo: Text
Palavras-chave: Mangroves; Crabs; Community composition; Bioturbation; French Guiana; Amazon.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00350/46154/45852.pdf

Mangrove‐Derived Organic and Inorganic Carbon Exchanges Between the Sinnamary Estuarine System (French Guiana, South America) and Atlantic Ocean
Provedor de dados: 5
Autores: Ray, Raghab; Thouzeau, Gerard; Walcker, Romain; Vantrepotte, Vincent; Gleixner, Gerd; Morvan, Sylvain; Devesa, Jeremy; Michaud, Emma.
There is growing evidence that a substantial fraction of the dissolved organic and inorganic carbon (DOC and DIC) and particulate organic carbon (POC) can be exported from mangroves to the ocean. Yet our understanding of C fluxes in mangrove forests is limited to only few regional studies that exclude the world's longest sediment dispersal system connected to the Amazon River. The present study aims at (1) examining tidal fluctuations of DOC, POC, and DIC; their isotopes; and optical properties such as chromophoric dissolved organic matter (CDOM) and (2) estimating their exchange fluxes between the mangroves and adjacent coastal water in the Sinnamary estuary, French Guiana. Time series observation highlighted that physical processes coupled to tides...
Tipo: Text
Palavras-chave: Organic matter; Tidal cycle; Carbon flux; Mangroves; French Guiana.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00643/75488/76339.pdf

Sustainability of tropical small-scale fisheries: Integrated assessment in French Guiana
Provedor de dados: 5
Autores: Cisse, Abdoul; Blanchard, Fabian; Guyader, Olivier.
Like many tropical small-scale fisheries, the French Guiana coastal fishery is characterized by the high fish biodiversity of its ecosystem, the weak selectivity of the fleets exploiting the resources, and the heterogeneity of the vessels in terms of size and fishing techniques. The Rapfish method is used to assess sustainability within 11 fishery systems by means of 27 attributes relating to ecological, economic, social, and technological fields. Overall results indicate an average performance in the weak sustainability range. Comparisons made among the FSs show a gradient of sustainability performance from the western portion of the coast to the eastern portion. Several recommendations are formulated to raise the current “sustainability” status, such as...
Tipo: Text
Palavras-chave: French Guiana; Small scale fishery; Sustainability; Rapfish; Ecosystem approach.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00162/27310/25662.pdf

On frogs, toxins and true friendship: an atypical case report
Provedor de dados: 80
Autores: Daniel-Ribeiro,Cláudio Tadeu; Roussilhon,Christian.
Abstract The authors report a series of events including the scientific interest for poisonous dendrobates of French Guiana, the human confrontation with the immensity of the evergreen rainforest, the fragility of the best-prepared individuals to a rough life, and the unique and very special manifestation of a solid friendship between two experts and enthusiasts of outdoor life. In the evergreen forest of South America, as in many other scientific field expeditions, everything may suddenly go wrong, and nothing can prepare researchers to accidents that may occur in a succession of uncontrollable errors once the first mistake is done. This is what happened during an expedition in search for dendrobates by an experienced forest guide and naturalist. The...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Dart frogs; Dendrobatidae; Toxins; French Guiana.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992016000100501

New species of the genera Foenomorpha Szépligeti (Cenocoeliinae) and Chelonus Panzer (Cheloninae) (Hymenoptera: Braconidae), from French Guiana, Suriname, and Brazil
Provedor de dados: 16
Autores: Braet, Y.; Achterberg, C. van.
Two new species of the genus Foenomorpha Szépligeti, 1904, are described (F. rufa spec. nov. from Brazil and F. senlura spec. nov. from French Guiana). A key to the known species is added and notes on the other two species are added. Foenomorpha filicornis (Cameron, 1887) is a new combination for Cenocoelius filicornis Cameron. An aberrant group of Chelonus with very slender antennal segments and a protuberant scutellum from French Guiana and Suriname is described and included in the new subgenus Baculonus (type species: C. pachytellus spec. nov.). Epsilogaster palenque Whitfield &amp; Mason, 1994, is reported for the first time from Costa Rica.
Tipo: Article / Letter to the editor
Palavras-chave: Braconidae; Cenocoeliinae; Cheloninae; Mendesellinae; Foenomorpha; Chelonus; Baculonus; Epsilogaster; New species; Neotropical; French Guiana; Suriname; Brazil; Costa Rica; Peru; Distribution; Key; 42.75.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/217437

Four new combinations in Chomelia and Stenostomum (Rubiaceae, Guettardeae) from Central America, the Guianas and the Amazon Basin
Provedor de dados: 16
Autores: Delprete, P.G.; Achille, F.; Mouly, A.
According to current generic delimitations, supported by wood anatomy, palynology, and recent molecular phylogenies, Antirhea, traditionally treated as a Pantropical genus, is instead restricted to the Paleotropics. At the same time, the Neotropical species traditionally positioned in Antirhea should be positioned in Stenostomum. Following these definitions, Stenostomum is a genus with most of the species present in the Caribbean Region, and two species present in the Guianas, namely S. acreanum and S. guianensis, distributed throughout the Amazon Basin. In addition, according to these new generic delimitations, two species previously positioned in Guettarda and Antirhea need to be transferred to Chomelia, as C. triflora and C. ulei.
Tipo: Article / Letter to the editor
Palavras-chave: Amazon Basin; Chomelia; Floristics; French Guiana; Guettarda; Guettardeae; Guyana; Rubiaceae; South America; Stenostomum; Taxonomy.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/525264

Notes on the genera Exasticolus van Achterberg (Homolobinae) and Orgilus Haliday (Orgilinae) (Hymenoptera: Braconidae), with the description of three new species from French Guiana
Provedor de dados: 16
Autores: Braet, Y.; Achterberg, C. van.
Among the collected material from the Kaw Montains, French Guiana, a new species of the genus Exasticolus van Achterberg, 1979 (Hymenoptera: Braconidae: Homolobinae: E. thirionae spec. nov.) and two new species of the genus Orgilus Haliday, 1833 (Hymenoptera: Braconidae: Orgilinae: O. podus spec. nov. and O. quadricolor spec. nov.) were discovered. Exasticolus thirionae spec. nov. differs from the other three known species by the reduced setosity of the fore wings. E. fuscicornis (Cameron, 1887) is for the first time reported from Belize, French Guiana, Guatemala and Venezuela, and E. nigriceps (Enderlein, 1920) from Costa Rica.  The morphological variation in the genus Orgilus in the Neotropical region is illustrated by the description of the two new...
Tipo: Article / Letter to the editor
Palavras-chave: Braconidae; Homolobinae; Orgilinae; Exasticolus; Orgilus; Podorgilus; Stantonia; New species; Neotropical; French Guiana; Distribution; Key; 42.75.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/217436

Guatteria richardii (Annonaceae) rediscovered along with two new species from French Guiana
Provedor de dados: 16
Autores: Scharf, U.; Maas, P.J.M.; Morawetz, W.
For the first time, 140 years after the collection of the first specimen and 70 years after the description of Guatteria richardii R.E. Fr. from French Guiana, more specimens that are referable to this species were discovered during a taxonomic treatment for the Flora of the Guianas project, concerning Guatteria Ruiz &amp; Pav. (Annonaceae). In addition, G. intermedia and G. montis-trinitatis, two similar species – the first widely distributed and the second endemic to the Montagne de la Trinité in French Guiana, are described as new to science.
Tipo: Article / Letter to the editor
Palavras-chave: Annonaceae; Guatteria; Tropical South America; Guayana Shield; Brazil; French Guiana; Suriname; Taxonomy.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/525900

New taxa of the subfamily Doryctinae Foerster (Hymenoptera: Braconidae) from French Guiana and Brazil
Provedor de dados: 16
Autores: Braet, Y.; Achterberg, C. van.
Three genera of the subfamily Doryctinae Foerster, 1862 (Hymenoptera: Braconidae) are treated and keyed: Ptesimogaster Marsh, 1965, Caingangia Marsh, 1993, and Leptodoryctes Barbalho &amp; Penteado- Dias, 1999. The latter genus is characterised by the presence of an apical setal comb on the hind tibia. Two new genera are described: Ptesimogastroides gen. nov. (type species: P. cerdai spec. nov. from French Guiana and Brazil) and Dicarinoryctes gen. nov. (type species: D. apicalis spec. nov. from French Guiana). A further three new species are described: Caingangia delicata spec. nov. from French Guiana, Leptodoryctes barbalhoae spec. nov. from French Guiana, and Ptesimogaster lemkoi spec. nov. from Brazil. Pseudorhoptrocentrus platyfemur (Marsh, 1993) is a...
Tipo: Article / Letter to the editor
Palavras-chave: Braconidae; Doryctinae; Caingangia; Leptodoryctes; Heterospathius; Ptesimogaster; Dicarinoryctes; Ptesimogastroides; Pseudorhoptrocentrus; Curtisella; New species; New genus; Neotropical; French Guiana; Brazil; U.S.A.; Mexico; Distribution; Keys; 42.75.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/217438

Five new species of Guatteria (Annonaceae) from French Guiana, Guyana and Suriname
Provedor de dados: 16
Autores: Scharf, U.; Maas, P.J.M.; Morawetz, W.
As a precursor to a taxonomic treatment of Annonaceae for the Flora of the Guianas project, five new species of Guatteria Ruiz &amp; Pav. from French Guiana, Guyana and Suriname (Northern South America) are described here.
Tipo: Article / Letter to the editor
Palavras-chave: Annonaceae; Guatteria; Tropical South America; French Guiana; Guyana; Suriname; Taxonomy.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/526224

Lithoxus stocki, a species new to science of ancistrin loricariid catfish from the Maroni River drainage, with a comparison of the primary type specimens of the six species of Lithoxus (syn.: Paralithoxus) (Pisces, Siluriformes, Loricariidae)
Provedor de dados: 16
Autores: Nijssen, Han; Isbrücker, Isaäc J.H.
Lithoxus stocki, a catfish species new to science from the Maroni River drainage in French Guiana and Surinam is described. A lectotype is designated for Lithoxus bovallii. Morphometric and meristic characters of the six species of the genus are provided. Paralithoxus, originally proposed as a subgenus of Lithoxus, is relegated to the synonymy of Lithoxus.
Tipo: Article / Letter to the editor
Palavras-chave: Siluriformes; Lithoxus; French Guiana; Surinam.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/504531

An unusual new species of Guatteria (Annonaceae) from French Guiana and adjacent Brazil (Amapá)
Provedor de dados: 16
Autores: Scharf, U.; Maas, P.J.M.; Prévost, M.F.
During a taxonomic treatment of Annonaceae for the Flora of the Guianas project, an unusual new species of Guatteria Ruiz &amp; Pav., G. anteridifera from French Guiana and Amapá in Brazil (Northern South America) was found and described herein.
Tipo: Article / Letter to the editor
Palavras-chave: Annonaceae; Guatteria; Tropical South America; French Guiana; Taxonomy.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/525074

Comments on the type specimen of Dracaena guianensis Daudin, 1801 (Reptilia: Sauria: Teiidae), and rediscovery of the species in French Guiana
Provedor de dados: 16
Autores: Massary, J.-C. de; Hoogmoed, M.S.; Blanc, M.
A discussion on the whereabouts of the holotype of Dracaena guianensis is given, and its rediscovery in the National Museum of Natural History, Leiden, The Netherlands (RMNH) and the Muséum national d’Histoire naturelle, Anatomie Comparée, Paris, France (MNHN-AC) is reported. The RMNH possesses a stuffed specimen, of which the left forelimb has been amputated in life and of which the skull is no longer present in the specimen. The Paris museum possesses a skull that fits the Leiden specimen. Thus, the stuffed specimen and the skull together form the complete holotype, each object can be considered a “schizotype” of the holotype. After one of us observed the species again in French Guiana and documented this with a picture, the correction of the type...
Tipo: Article / Letter to the editor
Palavras-chave: Dracaena; Holotype; Rediscovery; Type locality; Range extension; French Guiana; 42.82.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/215740

Annotated checklist of the herpetofauna of Petit Saut, Sinnamary River, French Guiana
Provedor de dados: 16
Autores: Hoogmoed, M.S.; Avila-Pires, T.C.S.
The Mission Radeau des Cimes to Petit Saut, French Guiana, offered the opportunity to study the herpetofauna of the canopy of the tropical rainforest, an area hardly studied sofar. Two localities at heights of 30 and 35 m could be studied, whereas data on a third site were obtained through information from other participants. The herpetological results of the research in the canopy were meagre. Only the frog Hyla leucophyllata (Beireis) and the lizard Mabuya bistriata (Spix) were observed in the canopy. Additionally the terrestrial herpetofauna was studied extensively and turned out to contain some species that had not been reported before from French Guiana. Also, for many species new distribution data within French Guiana were obtained. Le Mission Radeau...
Tipo: Article / Letter to the editor
Palavras-chave: Reptilia; Amphibia; Tropical rainforest; Canopy; Forest floor; Neotropics; French Guiana; 42.82.
Ano: 1991
URL: http://www.repository.naturalis.nl/record/318446

Increasing diversity in the species-rich genus Guatteria (Annonaceae)
Provedor de dados: 16
Autores: Erkens, R.H.J.; Westra, L.Y.Th.; Maas, P.J.M.
During a taxonomic treatment of Annonaceae for the Flora of the Guianas project, an unusual new species of Guatteria Ruiz &amp; Pav., G. anteridifera from French Guiana and Amapá in Brazil (Northern South America) was found and described herein.
Tipo: Article / Letter to the editor
Palavras-chave: Annonaceae; Guatteria; Tropical South America; French Guiana; Taxonomy.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/525906

The value of the D1/D2 and internal transcribed spacers (ITS) domains for the identification of yeast species belonging to the genus Yamadazyma
Provedor de dados: 16
Autores: Groenewald, M.; Robert, V.; Smith, M.Th.
In a taxonomic study of yeasts that have been isolated in French Guiana and Thailand, five yeast strains isolated from plants were found to belong to the Yamadazyma clade of Saccharomycotina. On the basis of morphology, physiology and the nucleotide divergence in the D1/D2 domain of the 26S nuclear ribosomal RNA (nrRNA) gene, as well as the internal transcribed spacers (ITS) domain of the nrRNA gene operon, these strains were identified to represent three novel species in this teleomorphic clade. An additional isolate, that is publicly available from the CBS yeast collection and isolated from Taiwan, was found to be similar to one of the novel species described from Thailand. Yeast species belonging to the Yamadazyma clade have previously been described as...
Tipo: Article / Letter to the editor
Palavras-chave: French Guiana; Systematics; Thailand; Yamadazyma.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/531615

Geographic distribution of Hemigrammus ora (Ostariophysi: Characiformes: Characidae) in the Amazon basin, Brazil
Provedor de dados: 103
Autores: Jerep,Fernando C; Carvalho,Fernando R; Bertaco,Vinicius A.
New records of Hemigrammus ora Zarske, Le Bail &amp;amp; Géry, 2006, previously believed to be endemic to the French Guiana drainages, are confirmed for Brazilian drainages. The species is reported from the Tocantins-Araguaia system and lower Amazon River. Morphometric and meristic data, previously undescribed morphological traits related to caudal-fin squamation and anal-fin hooks, and geographic variation are presented for the species.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: French Guiana; Tocantins-Araguaia River basin; Guyana shield; Brazilian shield.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000400019

Redescription and resolution of some Neotropical species of jumping spiders described by Caporiacco and description of a new species (Araneae: Salticidae)
Provedor de dados: 104
Autores: Ruiz,Gustavo R. S.; Brescovit,Antonio D.
Type specimens of some of Caporiacco's Neotropical species are revised. The taxonomy of his species from French Guiana, whose type specimens are lost, is considered. The types of Corythalia hadzji Caporiacco, 1947, Corythalia luctuosa Caporiacco 1954, Hypaeus barromachadoi Caporiacco, 1947 and Naubolus melloleitaoi Caporiacco, 1947 are redescribed.The following new synonymies are established: Freya guianensis Caporiacco,1947 = Chira spinipes (Taczanowski, 1871) syn. nov.; Hypaeus bivittatus Caporiacco, 1947 = Hypaeus barromachadoi Caporiacco, 1947 syn. nov. New combinations are:Agelista petrusewiczi Caporiacco,1947 = Noegus petrusewiczi (Caporiacco,1947) comb. nov. .;Albionella chickeringi Caporiacco, 1954 = Mago chickeringi (Caporiacco,1954) comb....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: French Guiana; Guyana; Taxonomy; Venezuela.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000300013