Results 41 to 50 of about 1,719 (122)

Environmental Filtering Dominates Over Dispersal Limitation in Structuring Highly Mobile Tropical Communities

Journal of Biogeography, Volume 53, Issue 6, June 2026.
ABSTRACT Aim To disentangle the relative roles of environmental filtering (niche processes) and dispersal limitation (neutral processes) in structuring communities of a highly mobile tropical taxon, and to assess the implications for biodiversity patterns at broad spatial scales. Location Brazilian Amazon. Time Period 2011–2019.
Rafael M. Rabelo, Cristian Dambros, Márlon B. C. S. Graça, Geanne C. N. Pereira, Isabela F. Oliveira, Tarik Godoy Dangl Plaza, William E. Magnusson   +6 more
wiley   +1 more source

Feeding ecology of an Amazonian electric knifefish under altered flood‐pulse dynamics caused by hydroelectric damming

Journal of Fish Biology, Volume 108, Issue 6, Page 1778-1787, June 2026.
Abstract This study evaluated the effects of the controlled flood pulse on diet composition, trophic niche breadth and feeding intensity of Archolaemus janeae, an electric knifefish species with a restricted distribution in the Amazon Basin. Monthly samples were collected from December 2020 to November 2021 in the Volta Grande stretch of the Xingu ...
Ana F. V. N. M. Costa, Antonio A. Jardim Jr, Erival G. Prata, Rafael R. Gusmão, Angelo J. Faro Júnior, Alan S. Fonseca, Danielly T. Hashiguti, Luciano F. A. Montag, Tiago M. S. Freitas   +8 more
wiley   +1 more source

The Most Elusive Amazonian Mammal? Distribution, Survey, Ecology and Conservation of the Bushy‐Tailed Opossum Glironia venusta

Mammal Review, Volume 56, Issue 2, June 2026.
Integrating multiple data sources, we reveal a broader distribution for Glironia venusta and highlight how sampling strategies shape our understanding of rare arboreal mammals. ABSTRACT Introduction Arboreal and nocturnal mammals in the Amazon remain poorly understood due to low detectability and methodological limitations. Glironia venusta, one of the
Alexander Roldán Arévalo‐Sandi, Fernando Ferreira de Pinho, Andressa Bárbara Scabin, Fernando Trujillo, Maria Nazareth Ferreira da Silva, Wilson Roberto Spironello   +5 more
wiley   +1 more source

Spatiotemporal Patterns and Socioeconomic Determinants of Pulmonary Tuberculosis in Piauí, Northeast Brazil, 2001–2024

Tropical Medicine &International Health, Volume 31, Issue 6, Page 754-765, June 2026.
ABSTRACT Background Pulmonary tuberculosis (PTB) remains a major public health problem, strongly associated with social and territorial inequalities. This study aimed to analyse temporal trends, spatiotemporal transmission patterns and socioeconomic determinants of PTB in the state of Piauí, Northeast Brazil, from 2001 to 2024.
José Mário Nunes da Silva, Viriato Campelo, Walter Massa Ramalho   +2 more
wiley   +1 more source

Manejo integrado do fogo no Parque Nacional de Ilha Grande, Brasil

Biodiversidade Brasileira, 2019
O Parque Nacional de Ilha Grande - PNIG, localizado no bioma Mata Atlântica e designado como sítio Ramsar, inserido em território brasileiro, tem histórico de grandes incêndios em períodos de três a cinco anos.
Tersio Abel Pezenti
doaj   +3 more sources

The Flooding Gradient Affects Seed Dispersal by Fruit‐Eating Fishes in Amazonian Whitewater Floodplain Forests

Biotropica, Volume 58, Issue 3, May 2026.
This research approaches the interaction between frugivorous fish and the flooded forests in the central Amazon. We evaluated the fruit consumption by fish and the seed dispersal potential along the flood gradient. We tested the hypothesis that the role of fish as seed dispersers varies between low várzea (LV) and high várzea (HV) forests.
Gilvan Costa, Sandra Bibiana Correa, Florian Wittmann, Jochen Schöngart, Maria Teresa Fernandez Piedade, Efrem Jorge Ferreira, Leonardo Maltchik   +6 more
wiley   +1 more source

Uso e gestão do território em áreas de livre acesso no Amazonas, Brasil Use and management of territory in areas with open acess in Amazonas, Brazil

Acta Amazonica, 2009
As comunidades tradicionais da várzea amazônica ocupam uma variedade de ambientes adaptadas às variações sazonais impostas pelo pulso de inundação, o que reflete no desenvolvimento de estratégias de uso e manejo dos recursos naturais.
Samantha Aquino Pereira, Nidia Noemi Fabré   +1 more
doaj   +1 more source

Richness and Composition of Mycorrhizal Fungi Varies by Flood Level and River Basin in Oligotrophic Amazonian Seasonally Flooded Forests

Ecology and Evolution, Volume 16, Issue 4, April 2026.
Conceptual representation of topographic gradients in Amazonian igapó forests. High, medium, and low igapós differ in elevation and flood duration, with low igapós experiencing the longest periods of inundation. Fungal mycelia and DNA symbols indicate sampling of root‐associated mycorrhizal communities across the gradient, used to assess the influence ...
Maihyra Marina Pombo, Camila Duarte Ritter, Florian Wittmann, Jadson José Souza de Oliveira, Maria Teresa Fernandez Piedade, Jochen Schongart, Alexander Zizka   +6 more
wiley   +1 more source

Variáveis ambientais na modelagem do grau de saturação do concreto

Revista IBRACON de Estruturas e Materiais
Com o objetivo de facilitar o cálculo do grau de saturação do concreto, visto que é um fator influente no coeficiente de difusão de íons cloreto no interior do concreto, foram elaborados modelos matemáticos que dispensam medições locais.
M. G. T. Peraça, A. T. C. Guimarães, H. C. Piccoli   +2 more
doaj   +1 more source

Taxonomy and diversity of Marcgraviaceae, north of the São Francisco river, northeast Brazil

Nordic Journal of Botany, Volume 2026, Issue 4, April 2026.
This study provides a comprehensive assessment of Marcgraviaceae species diversity north of the São Francisco river in northeastern Brazil, analyzing species richness and distribution patterns across 384 000 km² of phytogeographic domains. Through field collections, herbarium studies (both physical and digital), and detailed morphological analyses, we ...
Thales Carvalho, D. Victor Souza e Silva, William Matzenauer, Yuri Couceiro, Marccus Alves   +4 more
wiley   +1 more source