Phytoplankton Composition
Mostrando 13-24 de 59 artigos, teses e dissertações.
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13. Comunidade fitoplanctônica no monitoramento de rios do estado de São Paulo / Phytoplankton community in monitoring rivers of São Paulo state
There are few studies conducted on phytoplankton inhabiting the rivers. In São Paulo State many of the abstraction of water for public supply are located in lowland rivers and streams of low gradient and have a lot of dam built in their courses, and the presence of lateral lakes and small dams to capture water, contributing to the development of planktonic
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/10/2012
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14. A influência do fósforo na toxicidade de cobre e composição bioquímica de Chlorella vulgaris
Metal toxicity to microalgae is dependent on environmental conditions, evolutionary history of the microalgae, and previous exposure of the organism to the specific metal. Also, it is importantly influenced by the physiological condition of the algae in the moment of metal exposure. In this research we investigated several combinations of phosphorus (P) and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2011
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15. A dinâmica do fitoplâncton em uma várzea Amazônica variações sazonal e nictimeral (Várzea do Lago Grande de Curuai Pará, Brasil) / The dynamics of phytoplankton in an Amazon fllodplain - seasonal and nictemeral variations (Lago Grande de Curuai - Pará, Brasil)
The river-floodplain systems are environments submitted a lateral overflow of river channel due the rains and/or underground waters. They are controlled by the type of climate, morphology and local effects. The lowland lakes are also highly productive because of the rich sources of primary carbon. The sediments transport and suspended and dissolved matter ar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
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16. Zooplankton of an urban coastal lagoon: composition and association with environmental factors and summer fish kill
Zooplankton may be regarded as a sensitive tool for monitoring environmental variations in coastal lagoons due to their ability to immediately react to changes in the water column trophic features and salinity levels. As a coastal lagoon with a broad history of anthropic influence, Rodrigo de Freitas Lagoon (Rio de Janeiro, Brazil) is widely used for water s
Zoologia (Curitiba). Publicado em: 2011-06
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17. Efeitos do agrotóxico Vertimec no fitoplâncton: um estudo laboratorial e "in situ" / Effects of pesticide Vertimec on phytoplankton: a laboratorial and "in situ" study
Pesticides are chemical products applied to environment in order to control species which cause harm to agriculture. However, these chemicals can reach non-target species when flushed into aquatic ecosystems and even bring grave diseases to human health. Amongst many, Vertimec® stands out in a range of pesticides, being utilized in numerous agricultures, in
Publicado em: 2010
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18. Influência das frentes frias nos mecanismos de funcionamento da represa da UHE Carlos Botelho (Lobo/Broa) Itirapina SP, dos pontos de vista químico, físico e biológico
In Brazil there is a numerical predominance of river systems, which favors the construction of reservoirs. These reservoirs have great ecological, economic and social significance, so, the management, conservation and recovery of these systems are of fundamental importance with repercussions on the economy, social work and the uses of aquatic systems. Climat
Publicado em: 2010
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19. Produção e composição dos polissacarídeos extracelulares de Planktothrix agardhii (Cyanobacteria) e suas relações com bactérias no reservatório de Barra Bonita
The organism Planktothrix agardhii belongs to one of the two most abundant genera in the world among the phytoplankton (the other is Microcystis sp.). Nevertheless, the genus Planktothrix is potentially toxic, producing microcystins and anotoxinas, which makes relevant knowledge of the biology of species that produce large biomass, as the case of P. agardhii
Publicado em: 2010
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20. VariaÃÃo sazonal da composiÃÃo, densidade e biomassa da comunidade fitoplanctÃnica do Rio SÃo JoÃo, Parque Nacional do IguaÃu, ParanÃ, Brasil / Seasonal variation in composition, density and biomass of phytoplankton community of the SÃo JoÃo River, IguaÃu National Park, Paranà State, Brazil
Este trabalho objetivou analisar a variaÃÃo sazonal da estrutura da comunidade fitoplanctÃnica em um rio subtropical atravÃs dos dados de composiÃÃo, riqueza, densidade e biomassa em funÃÃo das variÃveis ambientais. As amostragens do fitoplÃncton e variÃveis abiÃticas foram realizadas entre agosto de 2008 e julho de 2009, em trÃs estaÃÃes em s
Publicado em: 2010
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21. Estudo sobre a evolução do aporte natural e antrópico de matéria orgânica para sedimentos de um sistema estuarino- lagunar tropical (Mundaú-Manguaba, Alagoas) utilizando lipídios como marcadores moleculares / Study on the evolution of natural and anthropogenic inputs of organic matter for sediments of a tropical lagoon-estuarine system (Mundaú-Manguaba, Alagoas) using lipids as molecular markers
This thesis presents a study on the accumulation of organic matter in the sediments of the complex estuarine lagoon Mundaú Manguaba (CELMM) using lipids (fatty acids, sterols and linear alcohols) as molecular markers to evaluate the sources (natural and anthropogenic) and spatial and temporal variation in the composition of sedimentary organic matter, as we
Publicado em: 2010
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22. Estudo da estrutura da comunidade zooplanctônica e sua relação com as cianobactérias em três reservatórios do médio rio Tietê, SP / Zooplankton structure and its relationships with cyanobacteria in three reservoirs of middle Tietê river, São Paulo State, Brazil
Cyanobacteria blooms are increasingly being detected in São Paulo state reservoirs, particularly in those of middle Tietê river basin. The presence of cyanobacteria can cause deterioration of water quality in these systems due to its potential toxicity to the aquatic biota, and also risks to human health. The aim of the present srtudy was to analyse the st
Publicado em: 2010
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23. O ÍNDICE DE SUSTENTABILIDADE AMBIENTAL DO USO DA ÁGUA (ISA) COMO FERRAMENTA DE CONTRIBUIÇÃO ÀS POLITICAS PÚBLICAS DE DESENVOLVIMENTO E CONSERVAÇÃO NA BACIA DO RIO BACANGA, SÃO LUÍS/ MA. / INDEX FOR ENVIRONMENTAL SUSTAINABILITY OF WATER USE (ISA) AS A TOOL FOR CONTRIBUTION TO THE POLICIES PUBLIC DEVELOPMENT AND CONSERVATION IN BACANGA RIVER BASIN, SÃO LUIS / MA.
A hydrographic basin is a complex environmental system, resulting from the interrelations between the physical-natural and socioeconomic subsystems. Its identity as the unifying of environmental processes and human interference is leading to its adoption as a research unit. It allows from the analysis of the physical-chemical, biological and socioeconomic fa
Publicado em: 2010
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24. Variability of δ13C and δ15N in three zooplankton species from the Upper Paraná River floodplain
This study evaluated the isotopic composition of three zooplankton species - Notodiaptomus amazonicus (Wright, 1935), Moina minuta Hansen, 1899 and Bosmina hagmanni Stingelin, 1904 - from the Upper Paraná River floodplain. We predicted that there would be isotopic variability among species in the different sampled environments. Samplings were conducted in t
Zoologia (Curitiba). Publicado em: 2009-12