Results 21 to 30 of about 44,348 (282)

Convergent adaptations: bitter manioc cultivation systems in fertile anthropogenic dark earths and floodplain soils in central Amazonia [PDF]

open access: yes, 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   +5 more sources

Palm phytoliths of mid-elevation Andean forests [PDF]

open access: yes, 2018
Palms are one of the most common tropical plant groups. They are widespread across lowland tropical forests, but many are found in higher altitudes have more constrained environmental ranges.
Huisman, Seringe N.   +2 more
core   +16 more sources

How People Domesticated Amazonian Forests

open access: yesFrontiers in Ecology and Evolution, 2018
For millennia, Amazonian peoples have managed forest resources, modifying the natural environment in subtle and persistent ways. Legacies of past human occupation are striking near archaeological sites, yet we still lack a clear picture of how human ...
Carolina Levis   +12 more
doaj   +1 more source

Divergent chemical cues elicit seed collecting by ants in an obligate multi-species mutualism in lowland Amazonia. [PDF]

open access: yesPLoS ONE, 2010
In lowland Amazonian rainforests, specific ants collect seeds of several plant species and cultivate them in arboreal carton nests, forming species-specific symbioses called ant-gardens (AGs).
Elsa Youngsteadt   +2 more
doaj   +1 more source

Domestication of the Amazonian fruit tree cupuaçu may have stretched over the past 8000 years

open access: yesCommunications Earth & Environment, 2023
Amazonia, one of the largest and most biodiverse ecosystems on Earth, is a significant yet less-known arena for ancient plant domestication. Here, we traced the origins of cupuaçu (Theobroma grandiflorum), an Amazonian tree crop closely related to cacao (
Matheus Colli-Silva   +5 more
doaj   +1 more source

LAY USE OF AMAZONIAN PLANTS FOR THE TREATMENT OF TUBERCULOSIS [PDF]

open access: yesActa Amazonica, 1997
The Brazilian State of Amazonas has a high incidence of Tuberculosis, 91.4 in 10,000 habitants (SESAU, 1994) and resistant strains of Mycobacterium tuberculosis are frequently being found in the region (SALEM et.al, 1990).
Christine STOREY, Júlia Ignez SALEM
doaj   +1 more source

Nutritional and health status of woolly monkeys [PDF]

open access: yes, 2008
Woolly monkeys (Lagothrix lagotricha and L. flavicauda) are threatened species in the wild and in captivity. Numerous zoological institutions have historically kept Lagothrix lagotricha spp., but only a few of them have succeeded in breeding populations.
Ange-van Heugten, K.D.   +3 more
core   +2 more sources

A fábrica das plantas globais: uma geografia da globalização das plantas da Amazônia

open access: yesConfins
Far from being an under-populated, wild or pristine region, the Amazon rainforest appears on the contrary to be a maker of global plants. What are the mechanisms of the globalization of Amazonian plants?
Bastien Beaufort
doaj   +1 more source

Food Plants Eaten by Amazonian Manatees (Trichechus inunguis, Mammalia : Sirenia)

open access: yesBrazilian Archives of Biology and Technology, 2002
To determine the feeding habits of the Amazonian manatee Trichechus inunguis in some Central Amazonian rivers and lakes, we compared plant epidermis found in the stomach contents and/or faeces of animals with a reference collection of plants present in ...
Ioni G. Colares, Elton P. Colares
doaj   +1 more source

Old carbon contributes to aquatic emissions of carbon dioxide in the Amazon [PDF]

open access: yes, 2014
Knowing the rate at which carbon is cycled is crucial to understanding the dynamics of carbon transfer pathways. Recent technical developments now support measurement of the <sup>14</sup>C age of evaded CO<sub>2</sub> from fluvial
Garnett, M.H.   +3 more
core   +2 more sources

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