The biosonar of the boto: evidence of differences among species of river dolphins (Inia spp.) from the Amazon [PDF]
PeerJ, 2021 Echolocation clicks can reflect the anatomy of the vocalizing animal, enabling the distinction of species. River dolphins from the family Iniidae are formally represented by one species and two subspecies (Inia geoffrensis geoffrensis and I.
Jéssica F. Melo +3 more
doaj +2 more sources
Convergent adaptations: bitter manioc cultivation systems in fertile anthropogenic dark earths and floodplain soils in central Amazonia [PDF]
, 2012 Shifting cultivation in the humid tropics is incredibly diverse, yet research tends to focus on one type: long-fallow shifting cultivation. While it is a typical adaptation to the highly-weathered nutrient-poor soils of the Amazonian terra firme, fertile
Alessandro Alves-Pereira +5 more
core +13 more sources
Frontiers in Water, 2021 The Madeira River rises in the Andes, draining the southwestern Amazon basin and contributing up to 50% of the Amazon River sediment load. The Porto Velho station monitors the Upper Madeira basin and is located just downstream of the Jirau and Santo ...
Irma Ayes Rivera +9 more
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Vegetation types of the upper Madeira River in Rondônia, Brazil [PDF]
Brittonia, 2017 We characterize the vegetation types of the upper basin of the Madeira River in the Brazilan state of Rondonia, a biodiverse region with elevated rates of habitat loss. Vegetation and environmental parameters were recorded from 37 observation points distributed along and near a 160 km stretch of the Madeira River and representing the range of regional ...
Natália Alves Perigolo +2 more
openaire +1 more source
Patents and Competition in the Automobile Industry [PDF]
, 1948 Methane (CH4) fluxes from world rivers are still poorly constrained, with measurements restricted mainly to temperate climates. Additional river flux measurements, including spatio-temporal studies, are important to refine extrapolations.
Ballester, Maria V. R. +5 more
core +3 more sources
A new species of Dendropsophus (Anura, Hylidae) from southwestern Amazonia with a green bilobate vocal sac [PDF]
ZooKeys, 2020 Recent studies have shown that species diversity of the South American frog genus Dendropsophus is significantly underestimated, especially in Amazonia.
Miquéias Ferrão +3 more
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Mineralogy and chemistry of bottom sediments of the middle and lower Madeira River and its main tributaries : Amazonas - Brazil [PDF]
, 2011 This study reports the granulometric, mineralogic and chemical analyses, including Pb isotope, carried out on the bottom sediments of the Madeira River, whose headwaters are in the Andes Mountain, and its tributaries that come from the cratonic region ...
HORBE, Adriana Maria Coimbra +2 more
core +1 more source
Acta Amazonica, 2011 O objetivo deste trabalho foi investigar a variação composicional e mineralógica dos sedimentos de fundo transportados pelos grandes rios da Amazônia, com nascentes nos Andes provenientes de rochas cratônicas.
Maria Mireide Andrade Queiroz +2 more
doaj +1 more source
Silicate rock weathering and atmospheric/soil CO2 uptake in the Amazon basin estimated from river water geochemistry: seasonal and spatial variations [PDF]
, 2003 Using the data of the CAMREX project (1982–1984) on the water geochemistry of the Amazon river and its main tributaries, it was possible to assess the silicate rock weathering processes and the associated consumption of atmospheric/soil CO2, taking into
Mortatti, Jefferson, Probst, Jean-Luc
core +2 more sources
Acta Scientiarum: Biological Sciences, 2015 Biological collections preserve the biodiversity of a nation. The fish collection of the Universidade Federal de Rondônia, recently established, contains about 41% of freshwater fish species known to occur in Brazil, and 24% of South America.
Willian Massaharu Ohara +5 more
doaj +1 more source