Oligotrophy
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Cumulative changes in water quality caused by six cascading hydroelectric dams on the Jauru River, tributary of the Pantanal floodplain
RESUMO O presente estudo avalia as alterações na qualidade da água, individuais e cumulativas, de seis hidrelétricas (HPP) em cascata, que estão em operação no Rio Jauru, um afluente direto do rio Paraguai, o principal rio da planície de inundação do Pantanal, além de apresentar uma caracterização geral da qualidade da água do Rio Jauru. A qua
RBRH. Publicado em: 18/04/2019
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2. Disentangling plant establishment in sandy coastal systems: biotic and abiotic factors that determine Allagoptera arenaria (Arecaceae) germination
ABSTRACT Germination rate and establishment success of plants in harsh environments depend on the ability of seeds to withstand unfavorable environmental conditions and avoid predators. Brazilian coastal plains, known as restinga, are subject to environmental factors that seriously limit plant establishment and survival (e.g. salinity, desiccation, oligotrop
Acta Bot. Bras.. Publicado em: 19/10/2017
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3. Species assemblages of zooplanktonic crustaceans in mountain shallow ponds of Chile (Parque Cañi)
Even though the Chilean lakes are characterized by their oligotrophy, a transition from oligotrophy to mesotrophy, due human intervention, has been reported in some lakes. Nevertheless, there are still some pristine and unpolluted small lakes and ponds in mountain zones, free of human intervention and surrounded by native forests. Nine unpolluted, oligotroph
Zoologia (Curitiba). Publicado em: 2010-02
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4. Flora diatomácea do reservatório de Tanque Grande, município de Guarulhos SP como indicadora da qualidade de água
The Tanque Grande Reservoir is responsible for supplying 10% of the total population of the city of Guarulhos, State of São Paulo, Brazil. It was constructed in order to dam the Tanque Grande River waters, an affluent of the Baquirivu-Guaçu River, which flows to the Tietê River, within the Greater São Paulo Metropolitan area. The reservoir is located wit
Publicado em: 2008
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5. Survival of Enterococcus faecalis in an Oligotrophic Microcosm: Changes in Morphology, Development of General Stress Resistance, and Analysis of Protein Synthesis
The ability of Enterococcus faecalis to metabolically adapt to an oligotrophic environment has been analyzed. E. faecalis is able to survive for prolonged periods under conditions of complete starvation established by incubation in tap water. During incubation in this microcosm, cells developed a rippled cell surface with irregular shapes. Exponentially grow
American Society for Microbiology.
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6. Microbial physiology and ecology of slow growth.
The uptake capabilities of the cell have evolved to permit growth at very low external nutrient concentrations. How are these capabilities controlled when the substrate concentrations are not extremely low and the uptake systems could import substrate much more rapidly than the metabolic capabilities of the cell might be able to handle? To answer this questi
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7. Impact of Mount St. Helens Eruption on Bacteriology of Lakes in the Blast Zone
Lakes lying within the blast zone of Mount St. Helens showed dramatic increases in heterotrophic bacterial numbers after the eruption of 18 May 1980. The total microscopic counts of bacteria in some of the most severely affected lakes were more than 107 cells per ml, an order of magnitude above the counts in outlying control lakes. Likewise, the numbers of v
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8. Biochemical Basis for Whole-Cell Uptake Kinetics: Specific Affinity, Oligotrophic Capacity, and the Meaning of the Michaelis Constant
Formulations are presented that describe the concentration dependency of nutrient-limited transport and growth in molecular terms. They relate the rate of transport at steady state through a two-sequence process, transport and metabolism, to ambient concentrations according to the amounts and kinetic characteristics of the two rate-limiting proteins in these