Results 161 to 170 of about 2,044 (183)
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Physiological bases of oligotrophy of microorganisms and the concept of microbial community
Microbial Ecology, 1991Three groups of physiological processes in microorganisms are considered the physiological basis of oligotrophy: the greater substrate affinity of the oligotrophs' transport systems, efficient or "economical" metabolism, and existence of a "master reaction" or "rate-determining steps" controlling the rate of metabolism. Heterotrophic microorganisms are
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Isolation and characterization of light-driven methylotrophs featuring oligotrophy
Bioscience, Biotechnology, and BiochemistryAbstract Methylotrophs live symbiotically with plants in the phyllosphere. Because the leaf surface is a harsh environment with light, temperature, and low trophic levels, microorganisms on the leaves may have oligotrophic metabolism or use light energy to compensate for the low-carbon conditions for their growth.
Miyu Morishita +3 more
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Journal of Experimental Marine Biology and Ecology, 1980
Abstract Natural phytoplankton assemblages from the Scripps Pier were grown in two chemostats under conditions that simulated two rates of upwelling followed by oligotrophic conditions. At a moderate upwelling rate ( D = 0.3·day −1 ) centric diatoms were selected, while at a low rate ( D = 0.1·day −1 ) a mixture of species dominated. Pumping of low-
William H Thomas
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Abstract Natural phytoplankton assemblages from the Scripps Pier were grown in two chemostats under conditions that simulated two rates of upwelling followed by oligotrophic conditions. At a moderate upwelling rate ( D = 0.3·day −1 ) centric diatoms were selected, while at a low rate ( D = 0.1·day −1 ) a mixture of species dominated. Pumping of low-
William H Thomas
exaly +2 more sources
Nutrition Structure and Oligotrophy Analysis of Seawater in Liusha Bay (China)
2012 2nd International Conference on Remote Sensing, Environment and Transportation Engineering, 2012The concentrations and distribution characteristics of nutrients in seawater at Liusha Bay of China were obtained based on the field observations in February (winter), May (spring), August (summer) and November (autumn), 2008. The results showed that the content of nutrients in seawater was rather low and the water body was oligotrolic in Liusha Bay ...
Jibiao Zhang +5 more
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Marine Pollution Bulletin, 2017
The study aimed at investigating factors influencing the recovery of the canopy seaweed Cystoseira brachycarpa. A manipulative experiment was done to test if in barren patches the recovery of Cystoseira I) is enhanced by the removal of the urchins, II) is prevented by eutrophication, III) depends on the time of patch clearance and IV) decreases with ...
Piazzi, Luigi, Ceccherelli, Giulia
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The study aimed at investigating factors influencing the recovery of the canopy seaweed Cystoseira brachycarpa. A manipulative experiment was done to test if in barren patches the recovery of Cystoseira I) is enhanced by the removal of the urchins, II) is prevented by eutrophication, III) depends on the time of patch clearance and IV) decreases with ...
Piazzi, Luigi, Ceccherelli, Giulia
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Equilibrium Models for Seasonal Dynamics of Plankton Biomass in Four Oligotrophy Lakes
Canadian Journal of Fisheries and Aquatic Sciences, 1987Plankton biomass dynamics were monitored over an 11-yr period in four coastal British Columbia lakes while they were disturbed by salmonid introductions, fertilization, and zooplankton harvesting. Except for dramatic zooplankton responses to fertilization, the lakes had relatively simple and stable seasonal biomass patterns, with midsummer zooplankton
Carl J. Walters +3 more
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Chapter 8 The Physiological Ecology of Nuisance Algae in an Oligotrophy Lake
1986Abstract Periphyton growth in oligotrophic Lake Tahoe appears to be regulated by nutrient Input and provides additional evidence of cultural eutrophication. A stalked diatom community, Gomphoneis herculeana , dominates the biomass in the eulittoral (splash) zone, and it is the luxuriant growth of this alga which has caused algal biofouling problems ...
John E. Reuter +2 more
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Marine Pollution Bulletin, 1992
Abstract A statistical analysis of inorganic nutrient data (P-PO4, N-NO3, N-NO2, N-NH3) has been made for scaling aquatic systems into oligotrophic, mesotrophic and eutrophic water types. The data derived from: (a) inshore and offshore waters of Saronicos Gulf and (b) from nearshore and offshore waters of the Island of Rhodes, Aegean Sea.
L. Ignatiades, M. Karydis, P. Vounatsou
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Abstract A statistical analysis of inorganic nutrient data (P-PO4, N-NO3, N-NO2, N-NH3) has been made for scaling aquatic systems into oligotrophic, mesotrophic and eutrophic water types. The data derived from: (a) inshore and offshore waters of Saronicos Gulf and (b) from nearshore and offshore waters of the Island of Rhodes, Aegean Sea.
L. Ignatiades, M. Karydis, P. Vounatsou
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Seasonal or Aperiodic Cessation of Oligotrophy in the Tropical Pacific Ocean
1988Large regions of the tropical Pacific Ocean are probably in a permanent oligotrophic state. A monitoring of the sea surface chlorophyll concentration (SSCC) in cooperation with the crews of merchant ships shows however that the phytoplankton biomass increases in some of these regions during brief periods.
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Ecological Adaptability of Bacillus to Extreme Oligotrophy in the Cuatro Cienegas Basin
2018The genus Bacillus is known for its ability to colonize diverse environments and to take up a wide variety of resources. Both properties are linked to its spore-forming life history strategy and to its high number of rrn operon copies per genome. Experimental evidence has postulated a relationship between the number of copies of the rrn operon and the ...
Jorge Valdivia-Anistro +2 more
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