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Empirical orthogonal functions (EOF) and composites analysis were employed on pentad data in order to investigate the tropical atmospheric-ocean patterns over the Atlantic Ocean and the spatial-temporal characteristics of the rainfall in eastern Amazon during the peak of the rainy season (February to April). The EOF results evidenced that the Intertropical Convergence Zone (ITCZ) is the main rainfall-producing system in eastern Amazon during the rainy season. Conditions associated with the southward SST gradient in the intertropical Atlantic formed the dynamic patterns that favored the position of the ITCZ to south of the equator, thus explaining the predominance of positive precipitation anomalies in eastern Amazon, especially in the state of Maranhão and northeastern Pará during the February and April months.
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http://dx.doi.org/10.1155/2015/209783 | DOI Listing |
Rev Bras Parasitol Vet
September 2025
Universidade Federal Rural do Rio de Janeiro - UFRRJ, Instituto de Veterinária - IV, Departamento de Epidemiologia e Saúde Pública - DESP, Seropédica, Rio de Janeiro, Brasil.
This study investigated the presence of Rickettsia spp., Ehrlichia spp., Anaplasma spp.
View Article and Find Full Text PDFJ Helminthol
August 2025
Laboratório de Sistemática e Coevolução, Universidade Federal do Pará, Campus Universitário de Bragança, Instituto de Estudos Costeiros; Travessa Leandro Ribeiro, s/n, bairro Aldeia, 68600-000, Bragança, Pará, Brazil.
Historical reconstruction studies are important for understanding the evolutionary mechanisms associated with different parasite-host systems. Platyhelminths of the classes Monopisthocotyla and Polyopisthocotyla (formerly Monogenoidea or Monogenea) have proven to be excellent models for historical reconstruction studies due to their exceptional parasite specificity, suggesting that cospeciation events are the main pattern observed in these parasite-host systems (i.e.
View Article and Find Full Text PDFInfect Dis Rep
August 2025
Programa de Pos-Graduação em Ciências Ambientais (PPGCA), Instituto de Geociências, Universidade Federal do Pará, Belém 66075-110, PA, Brazil.
Background: The Amazon biome exhibits complex arboviral transmission dynamics influenced by accelerating deforestation, climate change, and socioeconomic inequities.
Objectives/methods: This study integrates official epidemiological records with socioeconomic, environmental, and climate variables by applying advanced geostatistical methods (Moran's I, SaTScan, kernel density estimation) combined with principal component analysis and negative binomial regression to assess the spatiotemporal dynamics of dengue incidence and its association with socio-environmental determinants across municipalities in Pará state (eastern Brazilian Amazon) from 2010 to 2024.
Results: Dengue incidence showed an overall decline but with marked epidemic peaks in 2010-2012, 2016, and 2024.
Braz J Biol
August 2025
Universidade Estadual do Maranhão - UEMA, Departamento de Química e Biologia, Caxias, MA, Brasil.
The Amazon rainforest and its rivers host a vast biodiversity, including many unique yet undiscovered species, particularly among Amazonian fish. These organisms can be susceptible to ectoparasites, such as isopod crustaceans. This study describes the presence of the isopod Braga patagonica parasitizing Hoplias malabaricus in the state of Maranhão, located in the eastern Amazon region of Brazil.
View Article and Find Full Text PDFRev Bras Parasitol Vet
August 2025
Programa de Pós-graduação em Biodiversidade Tropical, Universidade Federal do Amapá - UNIFAP, Macapá, AP, Brasil.
The genus Amblyomma has the largest number of tick species in the Neotropical region. Amblyomma ovale displays high ecological plasticity and can be found in different habitats and a variety of vertebrate hosts. Small mammals of the family Echimyidae have been identified as hosts for this species.
View Article and Find Full Text PDF