Results 1 to 10 of about 60,499 (200)

Constraints on water activity at the Zhurong landing site in Utopia Planitia, Mars

Earth and Planetary Physics, 2023
Mineralogical evidence of water–rock interactions is a strong indicator of the presence of liquid water on ancient Mars. Previous observations have found widely distributed hydrated minerals in the southern highlands, whereas such discoveries have been ...
ChengZheng Yong, ZiYao Fang, CongCong Zhang, JunFeng Zhen, LiPing Qin   +4 more
doaj   +1 more source

Breeding records of Leptotila rufaxilla (Aves: Columbidae) in southwestern Brazilian Amazon with notes on nesting in some regions of occurrence

Revista Peruana de Biología, 2021
We present new aspects of breeding biology of Gray-fronted Dove Leptotila rufaxilla, from five nests found between 2012 and 2014 in a lowland forest fragment in southwestern Brazil.
Jônatas Lima, Railene Almeida, Edson Guilherme   +2 more
doaj   +1 more source

Soil fertility and drought interact to determine large variations in wood production for a hyperdominant Amazonian tree species

Frontiers in Forests and Global Change, 2023
IntroductionThe productivity of the Amazon Rainforest is related to climate and soil fertility. However, the degrees to which these interactions influence multiannual to decadal variations in tree diameter growth are still poorly explored.MethodsTo fill ...
Flavia Machado Durgante, Flavia Machado Durgante, Niro Higuchi, Shinta Ohashi, John Ethan Householder, Adriano José Nogueira Lima, Moriyoshi Ishizuka, Florian Wittmann, Florian Wittmann, Joaquim dos Santos, Vilany Matilla Colares Carneiro, Xiaomei Xu, Claudete Catanhede do Nascimento, Jochen Schöngart, Maria Teresa Fernandez Piedade, Adalberto Rodrigo Kossmann Schmitt, Yanka Laryssa Almeida Alves, Jennifer Lehman, Bruno Oliva Gimenez, Bruno Oliva Gimenez, Priscilla Maia Baggio, Lucas Kosvoski de Ourique, Susan Trumbore, Susan Trumbore   +23 more
doaj   +1 more source

The Epidemiologic Transition in French Guiana: Secular Trends and Setbacks, and Comparisons with Continental France and South American Countries

Tropical Medicine and Infectious Disease, 2023
There are great variations between population subgroups, notably in poorer countries, leading to substantial inconsistencies with those predicted by the classical epidemiologic transition theory.
Mathieu Nacher, Célia Basurko, Maylis Douine, Yann Lambert, Najeh Hcini, Narcisse Elenga, Paul Le Turnier, Loïc Epelboin, Félix Djossou, Pierre Couppié, Bertrand de Toffol, Kinan Drak Alsibai, Nadia Sabbah, Antoine Adenis   +13 more
doaj   +1 more source

Dry Season Transpiration and Soil Water Dynamics in the Central Amazon

Frontiers in Plant Science, 2022
With current observations and future projections of more intense and frequent droughts in the tropics, understanding the impact that extensive dry periods may have on tree and ecosystem-level transpiration and concurrent carbon uptake has become ...
Gustavo C. Spanner, Bruno O. Gimenez, Bruno O. Gimenez, Cynthia L. Wright, Valdiek Silva Menezes, Brent D. Newman, Adam D. Collins, Kolby J. Jardine, Kolby J. Jardine, Robinson I. Negrón-Juárez, Adriano José Nogueira Lima, Jardel Ramos Rodrigues, Jeffrey Q. Chambers, Jeffrey Q. Chambers, Jeffrey Q. Chambers, Niro Higuchi, Jeffrey M. Warren   +16 more
doaj   +1 more source

Minor components in oils obtained from Amazonian palm fruits

Grasas y Aceites, 2013
This study deals with the characterization of minor compounds in oils obtained from the mesocarp of fruits of the main palm species from the State of Amapá, Brazil, i.e.
M. F.G. Santos, R. E. Alves, M. V. Ruíz-Méndez   +2 more
doaj   +1 more source

Major components in oils obtained from Amazonian palm fruits

Grasas y Aceites, 2013
Native palm trees belong to the Arecaceae family and are among the most useful plant resources in the Amazons. Despite its great diversity and various uses, few species have been study in detail, which makes it necessary to perform more comprehensive ...
M. F. G. Santos, S. Marmesat, E. S. Brito, R. E. Alves, M. C. Dobarganes   +4 more
doaj   +1 more source

Molecular Characterization of the Archaeal Community in an Amazonian Wetland Soil and Culture-Dependent Isolation of Methanogenic Archaea

Diversity, 2010
Tropical wetlands are the major natural source of methane released into the atmosphere, producing about 60% of all natural emissions. The great wetland areas of the Amazon basin are the largest source of methane in this region, contributing an estimated ...
Siu M. Tsai, Rosana F. Vazoller, Jeanedy M. Pazinato, Lucas W. Mendes, Ezio N. Paulo   +4 more
doaj   +1 more source

Comparative Constructions in Murui (Witotoan, Northwest Amazonia)

Linguistic Discovery, 2018
This paper focuses on the forms and functions of various comparative constructions found in Murui, a Witotoan language of Northwest Amazonia (Colombia, Peru). It analyses different types of comparative construction, their forms and semantics.
Katarzyna I. Wojtylak
doaj   +1 more source

Soil Quality Restoration during the Natural Succession of Abandoned Cattle Pastures in Deforested Landscapes in the Colombian Amazon

Agronomy, 2021
Successional processes in abandoned pastures in the Amazon region have been well-documented for the floristic component; however, soil succession has been poorly studied. This study assessed the physical, chemical and biological responses of soils in the
Carlos H. Rodríguez-León, Clara P. Peña-Venegas, Armando Sterling, Daniel Castro, Lizeth K. Mahecha-Virguez, Yeny R. Virguez-Díaz, Adriana M. Silva-Olaya   +6 more
doaj   +1 more source