Results 11 to 20 of about 90,560 (291)

The onset of grasses in the Amazon drainage basin, evidence from the fossil record [PDF]

open access: yes, 2020
Poaceae (the grass family) originated in the Cretaceous, but first dominate the palynological records of the Amazon drainage basin (ADB) in the Neogene (23 to 2.5 million years ago (Ma)).
Hoorn, Carina, Kirschner, Judith A.
core   +3 more sources

Molecular surveillance of the Plasmodium vivax multidrug resistance 1 gene in Peru between 2006 and 2015

open access: yesMalaria Journal, 2020
Background The high incidence of Plasmodium vivax infections associated with clinical severity and the emergence of chloroquine (CQ) resistance has posed a challenge to control efforts aimed at eliminating this disease.
Fredy E. Villena   +8 more
doaj   +1 more source

Isopods Cymothoidae ectoparasites of fish from the Amazon

open access: yesRevista Brasileira de Parasitologia Veterinária, 2020
Most freshwater species of Cymothoidae are distributed in South America. They have mainly been recorded in the eastern and western regions of the Amazon River basin.
Lucena Rocha Virgilio   +5 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]

open access: yes, 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

Ancient Amazonian populations left lasting impacts on forest structure [PDF]

open access: yes, 2017
Amazonia contains a vast expanse of contiguous tropical forest and is influential in global carbon and hydrological cycles. Whether ancient Amazonia was highly disturbed or modestly impacted, and how ancient disturbances have shaped current forest ...
Braswell, Bobby H.   +8 more
core   +7 more sources

Spatial-temporal variation of dissolved inorganic material in the Amazon basin [PDF]

open access: yesActa Amazonica, 2015
The Amazon River basin is important in the contribution of dissolved material to oceans (4% worldwide). The aim of this work was to study the spatial and the temporal variability of dissolved inorganic materials in the main rivers of the Amazon basin ...
Liz Stefanny Hidalgo SÁNCHEZ   +4 more
doaj   +1 more source

Large emissions from floodplain trees close the Amazon methane budget [PDF]

open access: yes, 2017
Wetlands are the largest global source of atmospheric methane (CH4), a potent greenhouse gas. However, methane emission inventories from the Amazon floodplain, the largest natural geographic source of CH4 in the tropics, consistently underestimate the ...
A Siegenthaler   +46 more
core   +1 more source

What drives interannual variation in tree ring oxygen isotopes in the Amazon? [PDF]

open access: yes, 2016
Oxygen isotope ratios in tree rings (δ18OTR) from northern Bolivia record local precipitation δ18O and correlate strongly with Amazon basin-wide rainfall.
Arnold, SR   +7 more
core   +2 more sources

Major changes in glacial and Holocene terrestrial temperatures and sources of organic carbon recorded in the Amazon fan by tetraether lipids [PDF]

open access: yes, 2010
The Amazon basin is a major component of the global carbon and hydrological cycles, a significant natural source of methane, and home to remarkable biodiversity and endemism.
Bendle, JA   +8 more
core   +1 more source

Patents and Competition in the Automobile Industry [PDF]

open access: yes, 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

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