Piecewise Structural Equation Model (SEM) Disentangles the Environmental Conditions Favoring Diatom Diazotroph Associations (DDAs) in the Western Tropical North Atlantic (WTNA) by Marcus Stenegren, Carlo Berg, Cory C. Padilla, Stefan-Sebastian David, Stefan-Sebastian David, Joseph P. Montoya, Patricia L. Yager, Rachel A. Foster, Rachel A. Foster, Rachel A. Foster

“…Here, we examined abundance and distribution patterns for two DDA populations in relation to the Amazon River (AR) plume in the WTNA. Quantitative PCR assays, targeting two DDAs (het-1 and het-2) by their symbiont’s nifH gene, served as input in a piecewise structural equation model (SEM). …”
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Karyotypical Confirmation of Natural Hybridization between Two Manatee Species, <i>Trichechus manatus</i> and <i>Trichechus inunguis</i> by Edivaldo H. C. de Oliveira, Anderson J. B. Gomes, Alexandra F. Costa, Renata Emin-Lima, Cibele R. Bonvicino, Maria C. Viana, Laura M. A. Reis, Marcelo D. Vidal, Mirella V. G. Cavalcanti, Fernanda L. N. Attademo, Fábia O. Luna, Salvatore Siciliano

“…These species show a sympatric distribution in the region of the Marajó Archipelago, an estuarine area surrounding the Amazon River mouth. There is evidence of the occurrence of interspecific hybrids in this area, based on mitochondrial DNA analyses, although the use of nuclear markers has not corroborated this proposal. …”
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Drylands face potential threat of robust drought in the CMIP6 SSPs scenarios by Hongwei Li, Zhi Li, Yaning Chen, Yanyun Xiang, Yongchang Liu, Patient Mindje Kayumba, Xiaoyang Li

“…Additionally, Europe and the Amazon River Basin are also facing the threat of future drought. …”
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Low transmission rates of Equine infectious anemia virus (EIAV) in foals born to seropositive feral mares inhabiting the Amazon delta region despite climatic conditions supporting... by Cláudia Fideles Resende, Alison Miranda Santos, Richard Frank Cook, Raphael Mattoso Victor, Rebeca Jéssica Falcão Câmara, Gilberto Pereira Gonçalves, Juliana Gonçalves Lima, André Guimarães Maciel e Silva, Romulo Cerqueira Leite, Jenner Karlisson Pimenta dos Reis

“…Abstract Background Marajó Island, within in the Amazon River Delta, supports numerous bands of feral equids including the genetically distinct Marajoara horses. …”
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Estimation of the Madeira floodplain dynamics from 2008 to 2018 by Jérémy Guilhen, Jérémy Guilhen, Marie Parrens, Marie Parrens, Sabine Sauvage, William Santini, Franck Mercier, Ahmad Al Bitar, Clément Fabre, Jean-Michel Martinez, José-Miguel Sànchez-Pérez

“…The Madeira is one of the major tributaries of the Amazon River and is characterized by a large alluvial floodplain throughout the stream continuum. …”
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Near real-time surface water extraction from GOES-16 geostationary satellite ABI images by constructing and sharpening the green-like band by Xia Wang, Jian Gong, Yihang Zhang, Peter M. Atkinson

“…An additive wavelet luminance proportion (AWLP) approach in the pansharpening-then-construction strategy was applied to produce 0.5 km time-series water body maps every 10 min within a day for the main part of the Amazon River, as it produced a water body map with the greatest accuracy. …”
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Paratrichodina africana (Ciliophora: Trichodinidae) of wild and cultured Nile tilapia in the Northern Brazil Paratrichodina africana (Ciliophora: Trichodinidae) de til&#225;pia do... by Marcos Tavares-Dias, Natália da Costa Marchiori, Maurício Laterça Martins

“…Ninety fish were captured for parasitological analysis in Macap&#225;, State of Amap&#225;, from a wetland area bathed by the Amazon River commonly called &#8216;Ressaca do Zer&#227;o&#8217; (n = 52), as well as from a local fish farm (n = 38). …”
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GLOFRIM v1.0 – A globally applicable computational framework for integrated hydrological–hydrodynamic modelling by J. M. Hoch, J. M. Hoch, J. C. Neal, F. Baart, R. van Beek, H. C. Winsemius, H. C. Winsemius, P. D. Bates, M. F. P. Bierkens, M. F. P. Bierkens

“…We subsequently applied the framework to the Amazon River basin to not only test the framework thoroughly, but also to perform a first-ever benchmark of flexible and regular grids on a large-scale. …”
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Seasonal changes in the mixed and barrier layers in the western Equatorial Atlantic by Alex Silva, Moacyr Araujo, Carmen Medeiros, Marcus Silva, Bernard Bourles

“…The main process contributing to the seasonal BL formation is the discharge of low salinity waters from the Amazon river. During boreal late winter/spring (Mar-May; high river discharge), deeper isothermal (Z T) and mixed layers (Z M) prevail and the formation of a 16m-thick BL was clearly determined the formation of a salt-induced marked pycnocline within a deeper isothermal layer. …”
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Effects of anomalous climatic events on the structure of fish larvae assemblages in the eastern Amazon by Ruineris Almada Cajado, Ruineris Almada Cajado, Lucas Silva de Oliveira, Lucas Silva de Oliveira, Fabíola Katrine Souza da Silva, Diego Maia Zacardi, Marcelo Costa Andrade, Marcelo Costa Andrade

“…Thus, the results contribute to the understanding of the interactions between anomalous climatic events and the reproduction of fish with different ecological characteristics in the Amazon River.…”
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Uso dos fenóis da lignina no estudo da matéria orgânica na várzea do Lago Grande Curuái, Pará e no Lago do Caçó, Maranhão, Brasil Use of lignin phenols in the study of organic matt... by Renata Zocatelli, Fernanda Cecanho, Marcelo Amorim, Marcelo Bernardes, Patricia Moreira-Turcq, Bruno Turcq, Abdelfettah Sifeddine, Renato Campello Cordeiro

“…"Várzea do Lago Grande Curuái" floodplain is located on the right bank of the Amazon River about 850 km from the estuary. Superficial sediments samples were compared with superficial samples from Lake Caçó, located in Maranhão, the edge of the Amazon ecosystem. …”
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Bacterioplankton Communities in Dissolved Organic Carbon-Rich Amazonian Black Water by François-Étienne Sylvain, Sidki Bouslama, Aleicia Holland, Nicolas Leroux, Pierre-Luc Mercier, Adalberto Luis Val, Nicolas Derome

“…ABSTRACT The Amazon River basin sustains dramatic hydrochemical gradients defined by three water types: white, clear, and black waters. …”
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Lutzomyia reducta Feliciangeli et al., 1988, a host of Leishmania amazonensis, sympatric with two other members of the Flaviscutellata complex in southern Amazonas and Rondônia, Br... by R. A. Freitas, T. V. Barrett, R. D. Naiff

“…L. olmeca nociva was restricted to poorly drained areas not subject to flooding, whereas L. flaviscutellata was ubiquitous L. reducta has never been detected north of the Amazon river in Brazil, but absence of recosrds from western and northwestern Amazonas State may reflect lack of collecting in these areas.…”
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The invasion of five alien species in the Delta do Parnaíba Environmental Protection Area, Northeastern Brazil by Daniel Loebmann, Ana Cecília G Mai, James T Lee

“…Macrobrachium rosenbergii may be sharing natural resources with the Amazon River prawn Macrobrachium amazonicum. Omobranchus punctatus shares habit with the native redlip blenny Ophioblennius atlanticus and other fishes, such as the frillfin goby Bathigobius soporator. …”
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Pan-Genome Analysis of Brazilian Lineage A Amoebal Mimiviruses by Felipe L. Assis, Leena Bajrai, Jonatas S. Abrahao, Erna G. Kroon, Fabio P. Dornas, Kétyllen R. Andrade, Paulo V. M. Boratto, Mariana R. Pilotto, Catherine Robert, Samia Benamar, Bernard La Scola, Philippe Colson

“…Recently, we isolated using Acanthamoeba sp. three new mimiviruses, all of lineage A of amoebal mimiviruses: Kroon virus from urban lake water; Amazonia virus from the Brazilian Amazon river; and Oyster virus from farmed oysters. The aims of this work were to sequence and analyze the genome of these new Brazilian mimiviruses (mimi-BR) and update the analysis of the Samba virus genome. …”
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Assessing the impact of hydrodynamics on large-scale flood wave propagation &ndash; a case study for the Amazon Basin by J. M. Hoch, A. V. Haag, A. van Dam, H. C. Winsemius, L. P. H. van Beek, M. F. P. Bierkens

“…In this study, the global hydrologic model PCR-GLOBWB at 30 arcmin spatial resolution was one-directionally and spatially coupled with the hydrodynamic model Delft 3D Flexible Mesh (FM) for the Amazon River basin at a grid-by-grid basis and at a daily time step. …”
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Pathway-Centric Analysis of Microbial Metabolic Potential and Expression Along Nutrient and Energy Gradients in the Western Atlantic Ocean by Maria A. Cavaco, Maya P. Bhatia, Alyse K. Hawley, Monica Torres-Beltrán, Winifred M. Johnson, Krista Longnecker, Kishori Konwar, Elizabeth B. Kujawinski, Steven J. Hallam, Steven J. Hallam, Steven J. Hallam, Steven J. Hallam, Steven J. Hallam

“…For example, at a station influenced by input from the Amazon River, expression of pathways related to oxidative stress was increased. …”
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Implementing a provisional overarching intervention for COVID-19 monitoring and control in the Brazil-Colombia-Peru frontier by Matilde Contreras, Felipe Gomes Naveca, Jose Joaquin Carvajal-Cortes, Guilherme F. Faviero, Jorge Saavedra, Eduardo Ruback dos Santos, Valdinete Alves do Nascimento, Victor Costa de Souza, Fernanda Oliveira do Nascimento, Dejane Silva e Silva, Sérgio Luiz Bessa Luz, Kelly Natalia Romero Vesga, Juan Camilo Grisales Nieto, Vivian I. Avelino-Silva, Vivian I. Avelino-Silva, Adele Schwartz Benzaken, Adele Schwartz Benzaken

“…The expedition was conducted at the Port of Tabatinga, a busy terminal with an intense flux of people arriving and departing in boats of all sizes, located in the Amazon River basin. Local government, non-profit organizations, private companies, and other stakeholders supported the intervention.ResultsThe expedition was accomplished in a convergence point, where migrant workers, traders, army personnel, people living in urban areas, and people from small villages living in riversides and indigenous territories are in close and frequent contact, with widespread cross-border movement. …”
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A taxonomic review of the Dark-winged Trumpeter Psophia viridis (Aves: Gruiformes: Psophiidae) by Marina Oppenheimer, Luís Fábio Silveira

“…These taxa are allopatric in distribution along the south of the Amazon River, although the precise limits of their distribution still remain unknown. …”
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Life history and environment of Cecropia latiloba in Amazonian floodplains by Pia Parolin

“…Cecropia latiloba can be considered to be one of the most efficient colonizers of open areas in the nutrient-rich whitewater floodplains of the Amazon river. Its main strategy to be successful is the high tolerance towards waterlogging and submergence, and the fast vertical growth and reiteration capacity. …”
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