Tropical Streams
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Post-fire consequences for leaf breakdown in a tropical stream
Resumo Objetivo Queimadas é um distúrbio natural nas paisagens do Bioma Savana. Este estudo avalia os efeitos do pós-fogo (antes e depois) na decomposição de serapilheira na comunidade de invertebrados e biomassa de fungos em diferentes detritos e malhas (fina e grossa) em riacho em curto prazo temporal. Métodos Folhas senescentes (2 ± 0,1 g de peso
Acta Limnol. Bras.. Publicado em: 03/06/2019
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2. Effects of anthropogenic impacts on benthic macroinvertebrates assemblages in subtropical mountain streams
The nature of the riparian and surrounding landscape has been modified by anthropogenic activities, which may subsequently alter the composition and functional structure of macroinvertebrate assemblages. The effect of these changes on function of benthic fauna is difficult to assess due to the scarce knowledge on functional structures in tropical streams. In
Iheringia, Sér. Zool.. Publicado em: 2013-12
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3. Diversity and microdistribution of black fly (Diptera: Simuliidae) assemblages in the tropical savanna streams of the Brazilian cerrado
We describe the abiotic factors affecting the distribution of black flies at a microhabitat scale, rather than at the regional scale usually present in the literature on the Neotropics. Black fly larvae were sampled from the Tocantins River and three tributaries, located in the Brazilian savanna (state of Tocantins, Brazil) during six bi-monthly sampling per
Memórias do Instituto Oswaldo Cruz. Publicado em: 2012-05
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4. Study of the assemblage of macroinvertebrates in streams of Mata Atlântica, using the isotope technique of delta13C e delta15N / Estudo da assembléia de macroinvertebrados em riachos da Mata Atlântica, utilizando a técnica isotópica de delta13C e delta15N
Several studies show a strong influence of terrestrial environment on streams contained therein. On headwater streams that influence is not just related to chemical and physical variables, but also is directly linked to what the stream metabolism, regulating the direct input of nutrients in the form of litter and particulate matter and internal productivity
Publicado em: 2010
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5. ESTIMATIVA DOS PARÂMETROS GENÉTICOS DE CARACTERES MORFOMÉTRICOS EM GUPPY (Poecilia reticulata)
The invasion of new environments is related to the genetic variability of the species. The guppy (Poecilia reticulata) is a species introduced accidentally or artificially, arisen from different populations of captivity around the world. In some countries, these introductions are made repeatedly, particularly to control the growth of disease-transmitting mos
Publicado em: 2008
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6. Padrões de circulação anômala associados a episódios úmidos e secos no sul do Brasil / Anomalous circulation patterns associated with wet and dry events in southern Brazil
The characteristics of the atmospheric circulation associated with persistent wet and dry events in Southern Brazil during all seasons were studied from 1979 to 2002, using precipitation pentad data. The result shows that the dominant oscillations of rainfall variability have periods between 2 and 6 pentads. Superposition of different periods was also identi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/04/2007
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7. Padrões de diversidade e organização temporal de Chironomidae (Diptera) em um córego tropical
In this study we investigated the temporal dynamics of a chironomid assemblage in a forested stream located in southeastern Brazil. First, we analyzed some diversity patterns of this assemblage by describing two macroecological relationships (body size-species richness and body size-abundance) and by testing with they vary in an intra-annual scale. Second, w
Publicado em: 2006
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8. O sistema de plantio direto : caminhos e descaminhos no município de Cândido Mota, São Paulo
Since its implementation, the no tillage system has represented a great evolution for tropical agriculture, mainly in soil conservation, making it possible the incorporation of extensive areas in the production of grains and cereals. The increasing development of scientific knowledge and interest concerning no tillage system practices considering its environ
Publicado em: 2006
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9. Estrutura de comunidades de peixes de igarapés de terra firme na Amazônia Central: composição, distribuição e características tróficas
Stream fish assemblages are known to be strongly influenced by channel structure, microhabitat diversity and other habitat characteristics. Nevertheless, the information about these relationships in tropical systems remains scarce, especially for Amazonian streams. We studied nine streamlets located at the Biological Dynamics Forest Fragments Project (BDFFP)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/04/2005
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10. Hitchhiking behaviour in the obligatory upstream migration of amphidromous snails
Migratory animals endure high stress during long-distance travel in order to benefit from spatio-temporally fluctuating resources, including food and shelter or from colonization of unoccupied habitats. Along with some fishes and shrimps, nerite snails in tropical to temperate freshwater systems are examples of amphidromous animals that migrate upstream for
The Royal Society.