Journal ArticleDOI
Micronutrient effects on cyanobacterial growth and physiology
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Overall, three trace metal dependent processes may contribute towards dominance: efficient use of limiting light, nitrogen fixation, and production of extracellular iron binding compounds.Abstract:
Trace metals play crucial roles in the carbon and nitrogen metabolism of cyanobacteria. Physiological responses to metal limitation and toxicity in culture have shown that iron is important for photosynthesis and energy distribution in the cell while both iron and molybdenum are biochemically involved in nitrate reduction and nitrogen fixation. Nitrogen fixation is also relatively sensitive to copper toxicity. Consequently, factors that affect the supply rate, chemical speciation, or the recycling of trace metals can alter patterns of primary productivity and nitrogen metabolism. Overall, three trace metal dependent processes may contribute towards dominance: efficient use of limiting light, nitrogen fixation, and production of extracellular iron binding compounds.read more
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Book
The Ecology of Phytoplankton
TL;DR: Reynolds as discussed by the authors provides basic information on composition, morphology and physiology of the main phyletic groups represented in marine and freshwater systems and reviews recent advances in community ecology, developing an appreciation of assembly processes, co-existence and competition, disturbance and diversity.
Journal ArticleDOI
Cyanobacterial dominance in lakes
Martin T. Dokulil,Katrin Teubner +1 more
TL;DR: Underlying mechanisms of cyanobacterial dominance are analyzed and discussed using both original and literature data from various shallow mixed and deep stratifying lakes from temperate and (sub)tropical regions.
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Cultivation of filamentous cyanobacteria (blue-green algae) in agro-industrial wastes and wastewaters: A review
TL;DR: The factors that affect the biomass composition of cyanob bacteria are reviewed and several studies that discuss the culture of filamentous cyanobacteria in agro-industrial wastes and wastewaters are presented, with special emphasis on Spirulina.
Journal ArticleDOI
Formation of Fe(III) oxyhydroxide colloids in freshwater and brackish seawater, with incorporation of phosphate and calcium
TL;DR: In this article, the formation of Fe(III) oxyhydroxide colloids by oxidation of Fe (II) and their subsequent aggregation to larger particles were studied in laboratory experiments with natural water from a freshwater lake and a brackish coastal sea.
Journal ArticleDOI
Blooming algae: a Canadian perspective on the rise of toxic cyanobacteria
TL;DR: The most common cyanotoxins, the hepatotoxic microcystins, are chemically diverse with some variants more toxic than others and with greater propensity for persistence and bioaccumulation.
References
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Journal ArticleDOI
Acidification and Toxicity of Metals to Aquatic Biota
P. G. C. Campbel,P. M. Stokes +1 more
TL;DR: A pH-dependent biological response is documented over a realistic range of H+ and metal concealing surfaces, and supporting experimental evidence exists for four metals.
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The influence of aqueous iron chemistry on the uptake of iron by the coastal diatom Thalassiosira weissflogii1
TL;DR: In this article, a technique that exploits the Fe(III) reducing property of ascorbate to dissolve filterable colloidal iron was used to measure the iron uptake by the coastal diatom Thalassiosira weissflogii.
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Blue-green algae: their excretion of iron-selective chelators enables them to dominate other algae.
TL;DR: During blue-green algal blooms, other algae can be completely suppressed, and iron deprivation induces the production of hydroxamate chelators, which appear to be the agent suppressing other algae.
Journal ArticleDOI
A model of physiological adaptation in unicellular algae
TL;DR: A simple growth model for unicellular algae is used to show that environmentally induced changes in cellular composition can be explained in terms of controlled adjustments acting to maximize the specific growth rate.