Biomass Temporal Variability
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Large-Scale Spatial and Temporal Variability of Larval Fish Assemblages in the Tropical Atlantic Ocean
Abstract This study investigated the large-scale spatial and temporal variability of larval fish assemblages in the west tropical Atlantic Ocean. The sampling was performed during four expeditions. Identification resulted in 100 taxa (64 families, 19 orders and 17 suborders). During the four periods, 80% of the total larvae taken represented eight characteri
An. Acad. Bras. Ciênc.. Publicado em: 14/02/2019
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2. INDEPENDÊNCIA DAS PRODUÇÕES EM EXPERIMENTOS COM CULTURAS OLERÍCOLAS / INDEPENDENCE OF PRODUCTION IN EXPERIMENTS WITH VEGETABLE CROPS
Knowledge of the variability of production among the experimental plots within the protected environment, both in space and along the different crops, it is necessary, since it allows reducing the error by increasing the reliability of the results with the experimental techniques and adoption of appropriate cultural management practices . Therefore, the aim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/12/2011
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3. Dinâmica funcional da comunidade microbiana heterotrófica em lagoa rasa subtropical
Aquatic ecosystems float around trends in which abrupt transitions can occur between persistents regimes, alterning the viability of the resources or the physical and chemical parameters. Following this trend, communities vary in time and space as a result of their interactions with the environment and other organisms. Microbial communities are important com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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4. Produção secundária e aspectos reprodutivos de copépodes pelágicos ao largo de Ubatuba (SP, Brasil) / Secondary production and reproductive aspects of pelagic copepods off Ubatuba (São Paulo, Brazil)
The present study evaluates how the pelagic copepod community structure and production from the inner shelf off Ubatuba (SP, Brazil) responded to environmental variability from July 2005 to June 2008. During these three years copepod secondary production was studied by the application of growth empirical models and weight-specific growth estimates obtained t
Publicado em: 2009
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5. Efeitos de peixes zooplanctívoros e onívoros sobre a resposta de comunidades planctônicas à fertilização por nutrientes
A teoria de cadeias alimentares prevê que a presença de onivoria pode atenuar os efeitos de cascata trófica e estabilizar as populações de autótrofos e herbívoros, as quais são desestabilizadas pela fertilização por nutrientes. Tendo em vista que muitos lagos e reservatórios tropicais encontram-se eutrofizados, estratégias que visem o controle do
Publicado em: 2009
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6. Estudo da variabilidade sazonal da profundidade óptica do aerossol em São Paulo a partir de radiômetros MFRSR / Study of the seasonal variability of the aerosol optical depth in São Paulo using MFRSR radiometers.
The evaluation of the aerosol effects to the local and global radiation budget, as well as the impact on human health, particularly in large urban centers, demands knowing accurately their concentration and spatial-temporal distribution. In this context, the accurate long term monitoring from ground based stations installed around the world has become a chal
Publicado em: 2008
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7. The role of the local and remote effects on the upwelling system variabilities along the western coast of South America, during El Niño / O papel de efeitos locais e remotos em variabilidades do sistema de ressurgência ao largo da costa oeste da América do Sul durante o El Niño
Off the western coast of South America, the coastal upwelling system presents an exceptional productivity, a result of the high efficiency of the biological ecosystem in converting the primary production into biomass. These chemical and biological processes are strongly modulated by the physical environment. For instance, during El Ni~no events the fishery p
Publicado em: 2008
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8. Aspects of the time-space variation of the phytoplankton biomass and production and related parameters in Santos Estuary and Bay / Aspectos da variação espacial e temporal da biomassa e produção fitoplanctônica e parâmetros correlatos no estuário e baía de Santos
The relationship between time-space variations of phytoplankton biomass and primary productivity and the variability in physical and chemical characteristics of the water column was investigated by monthly samplings of temperature, salinity, inorganic nutrients, seston and phytoplankton biomass in 4 oceanographic stations in Santos Bay and 3 stations in Sant
Publicado em: 2007
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9. Utilização de perfis multi-temporais do NDVI/AVHRR no acompanhamento da safra de soja no oeste do Parana / Use of NDVI/AVHRR time-series profiles for soybean crop monitoring in the west of Parana, Brazil
Crop yield forecasting systems are important sources of information for helping Governrnent and private institutions in agricultural trade matters. The traditional methods of crop yield forecasting norma1ly do not provide precise estimations, due to its subjectivity. The use of Geothecnology has been studied for the development of more efficient crop yield f
Publicado em: 2007
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10. Contribution to limnological knowledge of brazilian semi-arid reservoir that supply Fortalezas metropolitan region: Pacajus and Gavião dams (Ceará, Brazil) / Contribuição ao conhecimento limnológico de reservatórios do semi-árido brasileiro que abastecem a região metropolitana de Fortaleza: Açudes Pacajus e Gavião (Ceará, Brasil)
The main aim of this research was to investigate the influence of climatic and hydrodynamicsalterations about physical stability, resources availability, zooplankton community structure and spatial heterogeneity standard of Pacajus and Gavião dams, collected at two-month period between Nov. 1988 and Dec. 1998. In the reservoirs, the sample stations were dis
Publicado em: 2007
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11. Vertical and temporal aspectos of the variability of phytoplankton primary production and biomass at a fixed station in São Sebastião (SP) coastal region. / Simulacao da mistura vertical de massas de agua da regiao de Ubatuba (SP): Efeitos sobre a producao prima-ria e biomassa fitoplantonica , vols. I e II.
A mistura vertical de águas profundas, ricas em nutrientes e de baixas temperaturas, características da Água Central do Atlântico Sul (ACAS), com águas de baixa d;sponibilidade nutricional, baixa biomassa fitoplanctônica e de temperaturas mais elevadas, características da Água Costeira (AC), da região de Ubatuba, foi simulada através da realizaçã
Publicado em: 1993
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12. Impact of Coal-Coking Effluent on Sediment Microbial Communities: a Multivariate Approach
The functional response to and recovery from coal-coking waste effluent was evaluated for sediment microbial communities. Twenty estimates of microbial population density, biomass, and activity were measured five times during a 15-month period. Significant effects on microbial communities were observed in response to both wastewater contamination and diversi