Results 61 to 70 of about 1,708 (166)
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 +4 more
wiley +1 more source
Agro@mbiente On-line, 2010 O programa de melhoramento genético da Embrapa Roraima busca lançar cultivares de arroz que possuam características agronômicas superiores em relação as cultivares comerciais em uso.
Antonio Carlos Centeno Cordeiro +1 more
doaj +1 more source
Unprotected Waters: When Protection Fails In Freshwater
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 3, March 2026.ABSTRACT Invasive species are a major driver of biodiversity loss in protected areas (PAs), yet their impacts in aquatic environments are less well documented. This study investigated the occurrence and distribution of nonnative freshwater fish in federal PAs in Brazil.
Aymar Orlandi Neto +2 more
wiley +1 more source
SISTEMA de produção para arroz em várzeas: Rio Caeté-Pará. [PDF]
, 2011 Introdução. Sistema de produção. Caracterização do agricultor. Operações que formam o sistema. Recomendações técnicas.Encontro para elaboração de "Sistema de produção para arroz em várzeas", realizado em Bragança-PA, no período de 26 a 28 de abril de ...
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Acta Scientiarum: Animal Sciences, 2006 Três hectares de várzea, situados no Campus da Universidade Federal de Santa Maria, Estado do Rio Grande do Sul (Brasil), foram cultivados com Lolium multiflorum Lam.
Jumaida Maria Rosito +4 more
doaj
Abundancia y diversidad de peces predadores en lagos de Várzea de la Amazonia Central.
Revista Colombiana de Ciencia Animal Recia, 2015 La diversidad de peces en los lagos de várzea de la Amazonia es favorecida por la alta heterogeneidad espacial y por la interconectividad entre estos lagos y el canal principal del rio, regulada por el ciclo hidrológico.
MARIA GLAUCINEY MACEDO +2 more
doaj +1 more source
Vadose Zone Journal, Volume 25, Issue 2, March/April 2026.Abstract Soil moisture regulates plant water supply and drought sensitivity in tropical forests, yet its vertical and topographic variation remains poorly characterized. We combined high‐frequency time‐domain reflectometry measurements from 5 to 100 cm across plateau, slope, and valley landforms at the Zona Florestal 2 research site north of Manaus ...
Robinson Negron‐Juarez +12 more
wiley +1 more source
A OCUPAÇÃO DAS VÁRZEAS NA CIDADE DE BELÉM: CAUSAS E CONSEQÜÊNCIAS SOCIOAMBIENTAIS. [PDF]
, 2012 Este trabalho se pauta nas consequências socioambientais decorrentes do processo de ocupação das várzeas existentes no primeiro eixo de expansão da cidade de Belém do Pará.
Silva Pimentel, Márcia Aparecida da +2 more
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Semina: Ciências Agrárias, 2012 The objective of this study was to evaluate water contamination caused by chemicals used in rice irrigated cultivation of a small part of the Environmental Protection Area of the Islands and Floodplains of the Paraná River, specifically the portion ...
Marcos Rafael Nanni +2 more
doaj +1 more source
Austral Ecology, Volume 51, Issue 3, March 2026.ABSTRACT Migration is a global phenomenon shaping bird assemblages in response to seasonal climate variations. The Streamer‐tailed Tyrant (Gubernetes yetapa) is a Neotropical bird associated with wetlands. Although considered common across most of its range, its natural history remains poorly understood, and some authors have suggested it may exhibit ...
Thuani Luísa Saldanha Wagener +2 more
wiley +1 more source