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What Do We Know About Non-Native, Invasive, and Transplanted Aquatic Mollusks in South America? [PDF]
Biology (Basel)Darrigran G +13 more
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Amazonian amphibians: diversity, spatial distribution patterns, conservation and sampling deficits. [PDF]
Biodivers Data JPenhacek M +5 more
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Sporotrichosis in the Orinoco river basin of Venezuela and Colombia
Mycopathologia, 1989Six cases of sporotrichosis from the Orinoco river basin of Venezuela and Colombia are described; two are of the localized cutaneous type and four are lymphocutaneous. Diagnosis was based on the patient's clinical history and mycological culture. Epidemiology and distinctive cultural habits of the patients are discussed in connection with disease ...
Luis Yarzabal
exaly +3 more sources
Chemical Geology, 1997 Abstract We report SHRIMP UPb ages of 49 zircons from a sand sample from the lower Orinoco River, Venezuela, and Nd model ages of the fine sediment load from the main river and tributaries. The UPb ages reflect individual magmatic or metamorphic events, the SmNd model ages reflect average crustal-residence ages of the sediment sources.
N T Arndt, S L Goldstein
exaly +2 more sources
The biogeochemistry of lipids in rivers of the Orinoco Basin
Geochimica et Cosmochimica Acta, 1995Abstract Water samples from rivers in the Orinoco Basin were examined in order to assess the biogeochemistry of particle-associated and dissolved lipids. Lipid fractions were characterised so as to determine their origin, speciation, variability in individual rivers, and their flux to the lower Orinoco River. Aliphatic hydrocarbons, ketones, alcohols,
Rudolf Jaffé +3 more
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A new species of Tyttocharax (Characiformes: Characidae: Stevardiinae) from the Güejar river, Orinoco river Basin, Colombia [PDF]
Neotropical Ichthyology, 2012 A new Tyttocharax species from the Güejar River system, near the Macarena Mountains in Colombia is described. This is the first record for the genus from the Orinoco basin. The combination of the following characters distinguish Tyttocharax metae from its congeners: presence of bony hooks on the pectoral and caudal-fin rays; bony hooks on the anal-fin ...
CARLOS García-Alzate +1 more
exaly +6 more sources
Mercury in Populations of River Dolphins of the Amazon and Orinoco Basins
EcoHealth, 2019In the Amazon and Orinoco basins, mercury has been released from artisanal and industrial gold mining since the Colonial time, as well as a result of deforestation and burning of primary forest, that release natural deposits of methyl mercury, affecting the local aquatic vertebrate fauna.
F, Mosquera-Guerra +10 more
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Germanium and silicon in rivers of the Orinoco drainage basin
Nature, 1990CONTINENTAL weathering and mid-ocean-ridge hydrothermal circulation are the two main processes that release dissolved silicon to the ocean. It has been hypothesized1 that temporal variations in the relative strengths of these two processes might be estimated from the Ge/Si ratio of opal in marine sediments, because the chemistry of germanium is similar
Richard J. Murnane, Robert F. Stallard
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Fishes and aquatic habitats of the Orinoco River Basin: diversity and conservation
Journal of Fish Biology, 2016About 1000 freshwater fishes have been found so far in the Orinoco River Basin of Venezuela and Colombia. This high ichthyological diversity reflects the wide range of landscapes and aquatic ecosystems included in the basin. Mountain streams descend from the high Andes to become rapid‐flowing foothill rivers that burst out upon vast savannah flatlands ...
C A, Lasso +2 more
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