Results 221 to 230 of about 2,070,775 (260)

DNA barcoding uncovers two putative new species in Trachelyopterus (Siluriformes: Auchenipteridae). [PDF]

J Fish Biol
Cerqueira FJ, da Silva M, Haerter CAG, Mariotto S, Centofante L, Feldberg E, Filho OM, Margarido VP, Blanco DR, Lui RL.   +9 more
europepmc   +1 more source

Damming the Rivers of the Amazon Basin [PDF]

Nature, 2017
More than a hundred hydropower dams have already been built in the Amazon basin and numerous proposals for further dam constructions are under consideration. The accumulated negative environmental effects of existing dams and proposed dams, if constructed, will trigger massive hydrophysical and biotic disturbances that will affect the Amazon basin's ...
Edgardo M. Latrubesse, José C Stevaux, Naziano Filizola   +2 more
exaly   +7 more sources

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Geomorphological Diversity of Rivers in the Amazon Basin

Geomorphology, 2022
The regional extent and transboundary nature of the world largest rivers accentuate the difficulty to characterize river forms and processes at a whole basin scale. We developed a framework to define a river classification protocol adapted to large rivers and further applied this protocol to elaborate a geomorphological classification of Amazonian ...
Pablo Tedesco, Thierry Oberdorff, Laurent Schmitt   +2 more
exaly   +2 more sources

Hydraulic Complexity at a Large River Confluence in the Amazon Basin

Ecohydrology, 2017
AbstractConfluences are a classic feature in riverine networks with important ecological and morphological functions. A method to characterize the hydraulic complexity of a river based on velocity gradients was applied, for high and low flow conditions, to the Negro and Solimões Rivers confluence in the Amazon basin.
Roberto Ventura Santos, Naziano Filizola, Theodore A. Endreny   +2 more
exaly   +4 more sources

The Late Miocene Paleogeography of the Amazon Basin and the Evolution of the Amazon River System

Earth-Science Reviews, 2010
Abstract On the basis of paleontological content (vertebrates and palynology) and facies analysis from river banks, road cuts, and three wells, we have assigned the uppermost levels of the Solimoes Formation in western Amazonia, Brazil, to the Late Miocene.
Edgardo M. Latrubesse, Maria Lúcia Absy, Carlos Jaramillo   +2 more
exaly   +2 more sources

Chemical and Physical Denudation in the Amazon River Basin

Chemical Geology, 1997
We present major and trace element data on the suspended and dissolved phases of the Amazon River and its main tributaries. The Sr isotopic composition of the dissolved load is also reported. Special attention is paid to the abundances of REE and to their fractionation between the dissolved and suspended phase.
Philippe Negrel, Jérôme Gaillardet, Claude J Allègre   +2 more
exaly   +3 more sources

Mercury in Populations of River Dolphins of the Amazon and Orinoco Basins

EcoHealth, 2019
In 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, F, Trujillo, D, Parks, M, Oliveira-da-Costa, P A, Van Damme, A, Echeverría, N, Franco, J D, Carvajal-Castro, H, Mantilla-Meluk, M, Marmontel, D, Armenteras-Pascual   +10 more
openaire   +2 more sources

Oropouche Virus Transmission in the Amazon River Basin of Peru

The American Journal of Tropical Medicine and Hygiene, 1997
Seroepidemiologic studies were conducted to determine the prevalence of Oropouche (ORO) viral antibody, risk factors, and the incidence of infection among residents of the Amazon region of Peru. Blood samples, as well as demographic, cultural, and medical history data, were collected from residents in a sector of the city of Iquitos and in an adjacent ...
D M, Watts, I, Phillips, J D, Callahan, W, Griebenow, K C, Hyams, C G, Hayes   +5 more
openaire   +2 more sources

Clay Mineral Composition of River Sediments in the Amazon Basin

Catena, 2007
Abstract Clay minerals are important in evaluating the maturity of suspended sediments, weathering intensity and source area. However, there are processes that can change the mineral assemblage such as river transportation, deposition, remobilization and tributary inputs.
/Guyot, Jean-Loup, Jouanneau, J. M., Soares, L., Boaventura, G. R., Maillet, N., /Lagane, Christelle   +5 more
exaly   +4 more sources