Environmental Partitioning
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Composição isotópica e fluxos de CO2 em área de Cerrado (Parque Estadual de Vassununga, SP) / Isotopic composition and carbon dioxide fluxes in an area of Cerrado (State Park of Vassununga, SP)
The presente study was carreid out in area o Cerrado strictu senso located at the State Park of Vassununga, closed to the Santa Rita do Passa Quatro city, São Paulo State, Brazil. The aim was of the present work was to measure de CO2 fluxes released through respiration processes of the vegetation and soil (heterotrophic and autotrophic) to check the relativ
Publicado em: 2010
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14. Partição aditiva da diversidade de nematoda em lagoas costeiras : componentes espaciais e ambientais / Additive partitioning of Nematoda diversity in coastal lakes: spatial and environmental components
A partição aditiva da diversidade tem recebido cada vez mais atenção dos ecólogos, sendo utilizada como uma abordagem para fracionar a diversidade ao longo de múltiplas escalas. A abordagem permite ainda testar se a diversidade em cada uma das escalas é maior ou menor do que o esperado segundo uma distribuição de indivíduos ao acaso nas unidades am
Publicado em: 2009
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15. Geotecnologia aplicada à compartimentação ambiental da Bacia do Rio Ceará - Ce. / Environmental Geotechnology applied to the partitioning of the Ceará River Basin - Ce.
O surgimento das geotecnologias mobilizou técnicos de diferentes setores do conhecimento a aplicá-las em seus trabalhos, estudos e pesquisas. Visando aplicá-las em estudos de compartimentação ambiental elegeu-se dentre o conjunto de técnicas que a compõem o Sensoriamento Remoto e o Sistema de Informação Geográfica SIG, ratificando o uso e demonstra
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/06/2008
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16. Capacidade de regeneração da floresta tropical amazônica sob deficiência nutricional: resultados de um estudo numérico da interação biosfera-atmosfera / Amazon rainforest regrowth under nutrient stress: results from a biosphere-atmosphere interaction numerical study
This thesis investigates how the climate feedback and the nutrient feedback interact to regulate the patterns in the regrowth of the Amazon tropical forest after a large-scale deforestation. The study is performed using the fully coupled biosphere-atmosphere model CCM3-IBIS. Initially, the model was validated against observed climate and vegetation dynamics
Publicado em: 2008
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17. Cerrado assemblages of reptiles and amphibians along the drainage of Rio Tocantins and the impact of hydroelectric power plants on their conservation / Assembléias de répteis e anfíbios do Cerrado ao longo da bacia do rio Tocantins e o impacto do aproveitamento hidrelétrico da região na sua conservação
The Cerrado herpetofauna was studied along the basin of the Tocantins river using three distinct and complementary approaches. First, a fast sampling scheme, covering all the studied area, was conducted in 11 sites between the Central Plateau, in the state of Goiás, and the northern portion of the Tocantins depression, at the border of the states of Tocanti
Publicado em: 2007
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18. Trophic ecology of five flatfishes species (Actinopterygii, Pleuronectiformes) in the Sepetiba Bay, Rio de Janeiro, Brasil / Ecologia trófica de cinco espécies de linguados (Actinopterygii, Pleuronectiformes) na Baía de Sepetiba, Rio de Janeiro, Brasil
The aim of this work was to describe the trophic ecology of the five most abundant flatfishes species (Actinopterygii, Pleuronectiformes) in the Sepetiba Bay: Achirus lineatus, Trinectes paulistanus, Citharichthys spilopterus, Etropus crossotus and Symphurus tessellatus. Patterns of distribution were determined, and the feeding habits and resources partition
Publicado em: 2006
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19. Estudo da participação de metais traço em uma linha d`água de um tanque de cultivo de camarão marinho do município de Santa Rita-PB
Brazil, it is nowadays, is one of the main producing of sea shrimp of the world. Due to this position, necessary that is done there are discussions that relates this activity to the environmental preservation, aiming avoid, among others problems, irreparable damages to the mangroves ecosystem and modification in the water quality of the rivers that receive e
Publicado em: 2006
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20. Partitioning genetic effects due to embryo, cytoplasm and maternal parent for oil content in oilseed rape (Brassica napus L.)
Analysis of genetic main effects and genotype x environment (GE) interaction effects on the oil content of oilseed rape (Brassica napus L.) was conducted by using a genetic model for the quantitative traits of seeds in diploid plants. The experiments were carried out over two years with 8 parents and a diallel mating design, which produced F1 and F2 generati
Genetics and Molecular Biology. Publicado em: 2006
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21. Biometrical aspects of QTL detection in cultivated species. / Aspectos biométricos da detecção de QTL S ("Quantitative Trait Loci") em espécies cultivadas.
In general terms, QTL mapping di®ers from other research ac-tivities in genetics. Being basically a multiple test procedure, problems arise which are related to the joint level of signi¯cance of the analysis, and consequently, to its power. Using computational simulation of data, the power of simple marker analysis, carried out through multiple linear regr
Publicado em: 2001
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22. Influence of Environmental Stress on Biomass Partitioning in Transgenic Tobacco Plants Expressing the Movement Protein of Tobacco Mosaic Virus.
The influence of various environmental factors on biomass partitioning between shoots and roots in transgenic tobacco (Nicotiana tabacum) plants expressing the movement protein (MP) of tobacco mosaic virus (TMV) was investigated. TMV-MP-expressing transgenic plants exhibited a root-to-shoot ratio that was approximately 40% below that of transgenic vector con
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23. Carbon Partitioning in Eelgrass (Regulation by Photosynthesis and the Response to Daily Light-Dark Cycles).
Diel variations in rates of C export, sucrose-phosphate synthase (SPS) and sucrose synthase (SS) activity, and C reserves were investigated in Zostera marina L. (eelgrass) to elucidate the environmental regulation of sucrose formation and partitioning in this ecologically important species. Rates of C flux and SPS activity increased with leaf age, consistent
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24. Physiological Adaptations in Response to Environmental Stress During an N2-Fixing Anabaena Bloom
Anabaena spiroides has the ability to maintain intense biomass production for extensive periods in the epilimnion of a small eutrophic lake characterized by conditions shown to cause photooxidative death in a number of other phytoplankton. By the enhancement of carotenoid synthesis chlorophyll a was protected from photooxidation and prevented from catalyzing