Spatial And Temporal Scales
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. Repeated geophysical measurements in dry and wet soil conditions to describe soil water content variability
ABSTRACT: There is an increasing interest in the application of geophysical surveys to assess the soil water content (SWC) variation in both spatial and temporal scales. In this work, a geophysical survey was carried out at an experimental farm in dry and wet conditions. We determined the SWC data measured with the gravimetric method, apparent electrical con
Sci. agric. (Piracicaba, Braz.). Publicado em: 20/12/2019
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2. Structure and dynamics of the protoplankton community in an environmentally protected urban stream
Resumo O objetivo foi investigar, em escalas espacial e temporal, a abundância das comunidades de protozoários bem como os fatores intervenientes na estruturação das mesmas em um córrego urbano. Métodos: Amostras de água para análise de comunidades biológicas (amebas testáceas, ciliados e bactérias) e para análise de variáveis limnológicas fora
Braz. J. Biol.. Publicado em: 02/12/2019
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3. SENSOR SYSTEMS FOR MAPPING SOIL FERTILITY ATTRIBUTES: CHALLENGES, ADVANCES, AND PERSPECTIVES IN BRAZILIAN TROPICAL SOILS
ABSTRACT Soil fertility attributes have different scales and forms of spatial and temporal variations in agricultural fields. Adequate spatiotemporal characterization of these attributes is fundamental to the successful development of strategies for variable rate application of fertilizers, enabling the classic benefits of precision agriculture (PA). Studies
Eng. Agríc.. Publicado em: 09/09/2019
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4. Spatial variations at different observational scales and the seasonal distributions of stream macroalgae in a Brazilian subtropical region
We examined the relationships between environmental variations in lotic ecosystems with the seasonal dynamics of macroalgae communities at different spatial scales: drainage basin of two rivers (Rio das Pedras and Rio Marrecas), shading (open and shaded stream segments), mesohabitat (riffles and pools), and microhabitats. Data collections were made on a mont
Braz. J. Bot.. Publicado em: 2012
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5. Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
This study addresses the influence of water-level fluctuations on fish distribution at two temporal scales: seasonal (dry and rainy) and interannual (low and high volume conditions). The analysis of abundance relationships among three zooplanktivore Chirostoma species at fifteen sites in Lake Chapala, Mexico, revealed the significant influence of contrasting
Neotropical Ichthyology. Publicado em: 2011
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6. The role of population movement in the epidemiology and control of schistosomiasis in Brazil: a preliminary typology of population movement
This paper examines recent developments in migration studies. It reviews literature related to the potential role of internal population movement in the occurrence of schistosomiasis in Brazil and modifies Prothero's typology of population movement for use in Brazil. This modified classification system may contribute to a better understanding of schistosome
Memórias do Instituto Oswaldo Cruz. Publicado em: 2010-07
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7. Precipitação pluvial e temperatura do ar no Estado de São Paulo: periodicidades, probabilidades associadas, tendências e variações climáticas / Rainfall and air temperature series of the State of São Paulo, Brazil: periodicities, associated probabilities, trends, and climate variations
The socio-economic relevance of São Paulo State agribusiness, and the vulnerability of agriculture atmospheric events indicate the need for constant study of the dynamics of the climate system of the State of São Paulo, Brazil. The propose of this work was to study the statistics of time series of rainfall (PRE), maximum air temperature (Tmax), and minimum
Publicado em: 2010
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8. Estudo e modelagem das dinâmicas estruturais de assembléias de formigas tropicais em diferentes escalas ecológicas
The ecological theory is built on models that can explain the relationships between organisms and their environment. However, if this is a science that integrates knowledge and benefited from interdisciplinary approaches due to the enormous complexity observed in ecosystems. In this context, the use of mathematical tools has been extremely important for the
Publicado em: 2009
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9. Analysis of spatio-temporal changes to identify the times of landscape in a coastal region : case study : São Sebastião Island, SP / Medida de mudança espaço-temporal como fonte de identificação das linhas de evolução de paisagem costeira : estudo de caso : ilha de São Sebastião, SP
Decisions about the future in environmental planning depend of the landscape changes interpretations that result from human pressures over time, occurring at different scales. The literature emphasizes we need to develop methodological paths that allows an accurate analysis of this subject. Therefore these study intents to identify, to quantify, to spatial i
Publicado em: 2009
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10. Measures of the interannual marine variability on southeast Brazilian bight and its relationship to the spawning areas of Brazilian sardine (Sardinella braziliensis) / Medidas da variabilidade interanual marinha sobre a plataforma continental sudeste do Brasil e sua relação com áreas de desova da sardinha-verdadeira (sardinella brasiliensis)
This work aims to investigate the relation of marine interannual variability in a region located in southern coast of Brazil, also known as the Southeast Brazilian Bight (SBB) and the spawning areas of the Brazilian sardine (Sardinella braziliensis) in SBB. SBB marine ecosystems are related to a strong influence of a coastal upwelling system. Variables used
Publicado em: 2009
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11. Factors structuring fish assemblages in three distinct zones (river, mixture and coastal) of the rio Mambucaba estuary, Angra dos Reis-RJ. / Fatores estruturadores das assembléias de peixes em três distintas zonas (rio, mistura e costeira) do estuário do rio Mambucaba, Angra dos Reis- RJ.
The estuarine systems influence fish assemblages, throughout their longitudinal gradients and remarkable salinity changes. Such assemblages adapt to different habitat constraints and change in spatial and temporal scales. The aim of this study was to assess the ichthyofauna composition and structure in three zones of the Mambucaba estuary (CZ coastal zone; M
Publicado em: 2009
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12. Extensões da estatística scan espacial utilizando técnicas de otimização multi-objetivo
This work presents three new extensions of Kulldorffs Spatial Scan Statistic for the detection and inference of spatial clusters. Consider a map divided into m regions with known populations at risk and number of cases of some disease. We would like to know if the cases are randomly distributed over the m regions or not; if the cases are not randomly distrib
Publicado em: 2009