Floodplain
Mostrando 1-12 de 189 artigos, teses e dissertações.
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1. Evaluation of fisheries management strategies using a biotic integrity index in floodplain lakes in the lower Solimões River, Amazonas, Brazil
RESUMO A pesca é uma atividade importante na bacia amazônica e tem alto impacto potencial sobre a ictiofauna. Com o objetivo de alcançar sustentabilidade na atividade pesqueira de espécies focais, foram estabelecidas áreas protegidas no marco de um plano de manejo pesqueiro conhecido como Sistema de Manejo dos Lagos da Amazônia (ALMS). Com o objetivo d
Acta Amazonica. Publicado em: 2022
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2. Macrophyte functional composition is stable across a strong environmental gradient of a Neotropical floodplain
ABSTRACT Ecological communities are compared by the similarity or distinctness of their species. Taking into account community composition at a determined site, one could expect a similar reasoning to explain differences in both taxonomic and functional composition due to environmental gradients. We aim to evaluate spatial variation in functional composition
Acta Bot. Bras.. Publicado em: 2021-03
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3. River damming affects seedling communities of a floodplain forest in the Central Amazon
ABSTRACT The flood pulse of black water rivers in the Amazon basin determines the composition of species along the flood gradient in igapó forests. The Balbina dam, built on the Uatumã River, has altered the flood pulse and caused changes in the floristic composition of adult trees throughout the downstream area. There is a lack of studies on how communiti
Acta Bot. Bras.. Publicado em: 2020-03
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4. Restauração passiva em pastagens abandonadas a partir de núcleos de vegetação na Mata Atlântica, Brasil
Resumo Os núcleos de vegetação são estruturas formadas espontaneamente por pequenos agrupamentos de indivíduos arbustivos e arbóreos, que, ao evoluírem em pastagens perturbadas, podem contribuir na sucessão ecológica. Para compreender a evolução dos processos de restauração florestal passiva em ecossistemas tropicais, depois de paralisada a pecu
Ciênc. Florest.. Publicado em: 02/12/2019
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5. THREATS TO THE BIODIVERSITY OF THE BRAZILIAN PANTANAL DUE TO LAND USE AND OCCUPATION
Resumo O Pantanal é uma área úmida no centro da América do Sul (150.355 km2), principalmente no Brasil (140.000 km2), tocando o Paraguai e a Bolívia. Planície sazonalmente inundável, é alimentada pelo rio Paraguai e seus tributários, com suas nascentes no planalto do entorno, o qual conta apenas com 40% da vegetação natural remanescente. A relaç�
Ambient. soc.. Publicado em: 25/11/2019
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6. Molecular characterization of the invasive aquatic macrophyte Hydrilla verticillata (Hydrocharitaceae) in Brazil
Abstract: Invasive populations of macrophytes are widely distributed and have been successfully introduced and established in freshwater habitats. Hydrilla verticillata was first recorded in 2005 in the Upper Paraná River floodplain and in 2007 at the Itaipu Reservoir (Brazil-Paraguay border, ca. 300 km downstream from its first record). However, its geneti
An. Acad. Bras. Ciênc.. Publicado em: 14/10/2019
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7. Ichthyofauna from floodplain lakes of Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP), lower rio Purus
Resumo: A ictiofauna do rio Purus tem sido pouco investigada, especialmente em seu curso inferior, caracterizada pela diversidade de ambientes aquáticos, especialmente em áreas de inundação. Inventariamos a ictiofauna dos lagos de várzea com diferentes tipos de manejo na Reserva de Desenvolvimento Sustentável Piagaçu-Purus (RDS-PP), que representa imp
Biota Neotrop.. Publicado em: 15/08/2019
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8. Relationship of Neotropical otter vestiges with environmental and anthropogenic factors
RESUMO A lontra neotropical, Lontra longicaudis é um mustelídeo semiaquático que usa seu habitat de diferentes formas. Para entender a influência relativa de fatores antrópicos e ambientais sobre a distribuição de lontras neotropicais, nós conduzimos monitoramentos sistemáticos de vestígios de lontras na região do médio Rio Guamá, Pará, Amazôn
Acta Amaz.. Publicado em: 12/08/2019
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9. Richness, abundance and microhabitat use by Ardeidae (Aves: Pelecaniformes) during one seasonal cycle in the floodplain lakesof the lower Amazon River
ABSTRACT The Amazon floodplains become periodically submerged as result of seasonal changes in the water levels throughout the year. These changes influence the availability of microhabitats and consequently the abundance of organisms in these ecosystems. In this study we investigated 1) how changes in the water level affect the richness and abundance of ard
Zoologia (Curitiba). Publicado em: 08/08/2019
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10. Factors driving seed dispersal in a Neotropical river-floodplain system
ABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an e
Acta Bot. Bras.. Publicado em: 18/07/2019
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11. USE OF GROUND PENETRATING RADAR TO STUDY SPATIAL VARIABILITY AND SOIL STRATIGRAPHY
ABSTRACT Ground Penetrating Radar (GPR) is a geophysical method that uses electromagnetic waves to study subsurface structure in different fields such as geology, agriculture and civil engineering. The wave penetration in the soil is strongly controlled by the electrical conductivity of soil components such as clay, organic matter, and water. In this study,
Eng. Agríc.. Publicado em: 19/06/2019
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12. An assessment of the factors determining rotifer assemblage in river-lake systems: the effects of seasonality and habitat
ABSTRACT Zooplankton exhibit several trends of variation in space and time, and these trends can be more evident in natural environments without anthropic perturbations. Examples of anthropic factors are climate change, eutrophication and construction of reservoirs. This study evaluated the influence of three factors - seasonality, type of environment and th
Zoologia (Curitiba). Publicado em: 06/06/2019