Floodplain
Mostrando 25-36 de 189 artigos, teses e dissertações.
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25. Plant species diversity in a Neotropical wetland: patterns of similarity, effects of distance, and altitude
ABSTRACT The Brazilian Pantanal is an extensive wetland with heterogeneous habitats, primarily due to the river-floodplain system and plants with differential adaptations and reproductive strategies. Factors such as altitude, distance among plant formations, and flood pulse must be considered to better understand its diversity. Aiming to assess the influence
An. Acad. Bras. Ciênc.. Publicado em: 07/12/2017
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26. Composition, diversity and structure of vascular epiphytes in two contrasting Central Amazonian floodplain ecosystems
ABSTRACT Research focusing on assemblages of vascular epiphytes in the Amazon are scarce. This is especially true for Amazonian floodplain forests, for which only two previous studies have been published. We compared composition, richness and structure of epiphyte assemblages in white-water and black-water floodplains (várzea and igapó) in Central Amazonia
Acta Bot. Bras.. Publicado em: 2017-12
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27. Assessing the spatial variation of functional diversity estimates based on dendrograms in phytoplankton communities
ABSTRACT Variation in phytoplankton functional diversity is partioned and mapped using several indices and linkage methods based on dendrograms. The relationships between diversity metrics and major environmental predictors, including zooplankton density, were assessed in 29 phytoplankton communities of floodplain lakes distributed along the Middle Araguaia
Acta Bot. Bras.. Publicado em: 21/09/2017
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28. Organic Matter Stocks and the Interactions of Humic Substances with Metals in Araucaria Moist Forest Soil with Humic and Histic Horizons
ABSTRACT Soils with humic and histic horizons in tropical and subtropical ecosystems play an important role in determining the atmospheric C stock and its stabilization, climate regulation, water holding capacity, and environmental filtering, due to the different functions of soil organic matter (SOM). However, the processes and mechanisms that regulate SOM
Rev. Bras. Ciênc. Solo. Publicado em: 20/07/2017
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29. Is coexistence between non-native and native Erythrinidae species mediated by niche differentiation or environmental filtering? A case study in the upper Paraná River floodplain
RESUMO Teorias sobre nicho ecológico afirmam que divergência em traços funcionais entre espécies nativas e introduzidas são essenciais ao estabelecimento da espécie introduzida, pois estas devem ocupar um nicho não utilizado pelas espécies residentes. Por outro lado, a teoria de filtros ambientais afirma a convergência entre espécies introduzidas e
Neotrop. ichthyol.. Publicado em: 03/07/2017
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30. Biometry of neotropical invertebrates inhabiting floodplain rivers: unraveling bionomy
ABSTRACT Currently, it is widely recognized that invertebrates play key roles in neotropical floodplains and in many other environments worldwide. However, little information has been published concerning their biometry, in spite that it represents an essential tool for many different studies. Here, we provided length-mass and length-length relationships by
Iheringia, Sér. Zool.. Publicado em: 08/05/2017
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31. High genetic diversity among and within bitter manioc varieties cultivated in different soil types in Central Amazonia
Abstract Although manioc is well adapted to nutrient-poor Oxisols of Amazonia, ethnobotanical observations show that bitter manioc is also frequently cultivated in the highly fertile soils of the floodplains and Amazonian dark earths (ADE) along the middle Madeira River. Because different sets of varieties are grown in each soil type, and there are agronomic
Genet. Mol. Biol.. Publicado em: 10/04/2017
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32. Influence of hydrology on the fish body condition in a large subtropical floodplain
ABSTRACT With the objective of finding fluctuations on fish body condition in the Middle Paraná River floodplain in different hydrological scenarios, this attribute was analyzed in several trophic groups of a secondary floodplain channel and its associated lakes between 2010 and 2012. Standardized residuals generated by length-weight regressions were calcul
Neotrop. ichthyol.. Publicado em: 30/03/2017
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33. Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest
ABSTRACT Aggregate stability is one of the most important factors in soil conservation and maintenance of soil environmental functions. The objective of this study was to investigate the aggregate stability mechanisms related to chemical composition of organic matter in soil profiles with humic and histic horizons in a toposequence under Araucaria moist fore
Rev. Bras. Ciênc. Solo. Publicado em: 2017
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34. A new Centromochlus Kner, 1858 (Siluriformes: Auchenipteridae: Centromochlinae) from the transition between Amazon floodplain and Guiana shield, Brazil
RESUMO Espécies de Centromochlus têm ampla distribuição pela América do Sul, com registros para as principais bacias como o Amazonas e Orinoco, rios com drenagens no Escudo das Guianas como Essequibo, Corentyne, Copename, Maroni e Oiapoque, e ainda pelas drenagens do Escudo Brasileiro como Alto Paraná e São Francisco. Nos últimos quatro anos foram de
Neotrop. ichthyol.. Publicado em: 31/12/2016
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35. Body condition and energy density of juvenile streaked prochilod Prochilodus lineatus (Valenciennes, 1837) in a Neotropical floodplain
RESUMO Variações na densidade energética (E D ) e no fator de condição relativo (K n ) de juvenis de Prochilodus lineatus foram investigadas buscando identificar se estas duas variáveis respondem de forma semelhante aos fatores ambientais. Nossa hipótese é que o nível fluviométrico, em diferentes subsistemas da planície de inundação do alto ri
Neotrop. ichthyol.. Publicado em: 22/12/2016
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36. Phenology of the multi-use tree species Carapa guianensis in a floodplain forest of the Amazon Estuary
ABSTRACT Carapa guianensis is a multi-use tree species that is used for the production of timber and non-timber forest products (NTFPs) that are used and sold by rural Amazonian populations. Here we aimed to evaluate the phenophases of C. guianensis in várzea forest and relate them to climatic seasonality. Phenophases of flowering (flower buds and open flow
Acta Bot. Bras.. Publicado em: 2016-12